Update sensor parsing layout

ref:

.gitignore

@@ -80,10 +80,11 @@ create_feature_graphic.py
 # Tool caches and local state
 .cachebro/
 .osgrep/
+third_party/lpcnet_flutter/
 
 # Claude Code local settings (permissions, personal config)
 .claude/settings.local.json
 
 # Dart code coverage
 coverage/
-lcov.info
+lcov.info

CHANGELOG.md

@@ -0,0 +1,13 @@
+# Changelog
+
+## 2026-03-08 to 2026-03-14
+
+- Discovery and contacts: finished the discovery flow, removed artificial UI delays, added profile storage and sync, and allowed contact name overrides.
+- Messaging and channels: fixed channel sync, deduplication, overwrite and deletion issues, cleared message input after send, and added delayed-message warning tracking.
+- Voice and transport: improved voice playback quality, improved scan and advert parsing, and kept route path data visible in logs.
+- Maps and field operations: enabled iOS background GPS updates, added GPX trail import/export, introduced a fullscreen repeater map, and added live mesh traffic views.
+- Localization and UI polish: added multilingual localization coverage, updated locale strings, fixed onboarding layout issues, and refined channel and contacts presentation.
+
+## Key PRs
+
+- [#16](https://github.com/dz0ny/meshcore-sar/pull/16) Merge pull request #16 from `MGJ520/main`

ios/Runner.xcodeproj/project.pbxproj

@@ -489,7 +489,7 @@
 			buildSettings = {
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				CLANG_ENABLE_MODULES = YES;
-				CURRENT_PROJECT_VERSION = 111;
+				CURRENT_PROJECT_VERSION = 117;
 				DEVELOPMENT_TEAM = JND55328G8;
 				ENABLE_BITCODE = NO;
 				INFOPLIST_FILE = Runner/Info.plist;
@@ -511,7 +511,7 @@
 			buildSettings = {
 				BUNDLE_LOADER = "$(TEST_HOST)";
 				CODE_SIGN_STYLE = Automatic;
-				CURRENT_PROJECT_VERSION = 111;
+				CURRENT_PROJECT_VERSION = 117;
 				DEVELOPMENT_TEAM = JND55328G8;
 				GENERATE_INFOPLIST_FILE = YES;
 				MARKETING_VERSION = 1.0;
@@ -530,7 +530,7 @@
 			buildSettings = {
 				BUNDLE_LOADER = "$(TEST_HOST)";
 				CODE_SIGN_STYLE = Automatic;
-				CURRENT_PROJECT_VERSION = 111;
+				CURRENT_PROJECT_VERSION = 117;
 				DEVELOPMENT_TEAM = JND55328G8;
 				GENERATE_INFOPLIST_FILE = YES;
 				MARKETING_VERSION = 1.0;
@@ -547,7 +547,7 @@
 			buildSettings = {
 				BUNDLE_LOADER = "$(TEST_HOST)";
 				CODE_SIGN_STYLE = Automatic;
-				CURRENT_PROJECT_VERSION = 111;
+				CURRENT_PROJECT_VERSION = 117;
 				DEVELOPMENT_TEAM = JND55328G8;
 				GENERATE_INFOPLIST_FILE = YES;
 				MARKETING_VERSION = 1.0;
@@ -679,7 +679,7 @@
 			buildSettings = {
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				CLANG_ENABLE_MODULES = YES;
-				CURRENT_PROJECT_VERSION = 111;
+				CURRENT_PROJECT_VERSION = 117;
 				DEVELOPMENT_TEAM = JND55328G8;
 				ENABLE_BITCODE = NO;
 				INFOPLIST_FILE = Runner/Info.plist;
@@ -702,7 +702,7 @@
 			buildSettings = {
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				CLANG_ENABLE_MODULES = YES;
-				CURRENT_PROJECT_VERSION = 111;
+				CURRENT_PROJECT_VERSION = 117;
 				DEVELOPMENT_TEAM = JND55328G8;
 				ENABLE_BITCODE = NO;
 				INFOPLIST_FILE = Runner/Info.plist;

ios/Runner/Info.plist

@@ -43,7 +43,7 @@
 	<key>CFBundleSignature</key>
 	<string>????</string>
 	<key>CFBundleVersion</key>
-	<string>111</string>
+	<string>117</string>
 	<key>LSRequiresIPhoneOS</key>
 	<true/>
 	<key>ITSAppUsesNonExemptEncryption</key>

ios/fastlane/report.xml

@@ -5,22 +5,22 @@
     
     
       
-      <testcase classname="fastlane.lanes" name="0: default_platform" time="0.000256">
+      <testcase classname="fastlane.lanes" name="0: default_platform" time="0.00024">
         
       </testcase>
     
       
-      <testcase classname="fastlane.lanes" name="1: increment_build_number" time="0.924905">
+      <testcase classname="fastlane.lanes" name="1: increment_build_number" time="0.554978">
         
       </testcase>
     
       
-      <testcase classname="fastlane.lanes" name="2: build_app" time="113.366384">
+      <testcase classname="fastlane.lanes" name="2: build_app" time="100.17557">
         
       </testcase>
     
       
-      <testcase classname="fastlane.lanes" name="3: upload_to_app_store" time="755.542625">
+      <testcase classname="fastlane.lanes" name="3: upload_to_app_store" time="264.49426">
         
       </testcase>
     

lib/main.dart

@@ -25,6 +25,7 @@ import 'services/locale_preferences.dart';
 import 'services/mesh_map_nodes_service.dart';
 import 'services/update_checker_service.dart';
 import 'services/wizard_preferences.dart';
+import 'screens/discovery_screen.dart';
 import 'screens/home_screen.dart';
 import 'screens/welcome_wizard_screen.dart';
 import 'theme/app_theme.dart';
@@ -42,11 +43,13 @@ class MeshCoreSarApp extends StatefulWidget {
 }
 
 class _MeshCoreSarAppState extends State<MeshCoreSarApp> {
+  final GlobalKey<NavigatorState> _navigatorKey = GlobalKey<NavigatorState>();
   AppThemeMode _themeMode = AppThemeMode.system;
   Locale? _locale;
   bool _isInitialized = false;
   bool _shouldShowPermissionDialog = false;
   bool _wizardCompleted = true; // Will be updated in _initializeApp()
+  String? _pendingNotificationPayload;
 
   @override
   void initState() {
@@ -66,6 +69,7 @@ class _MeshCoreSarAppState extends State<MeshCoreSarApp> {
 
     // Set up notification tap handler for update notifications
     NotificationService().onNotificationTapped = _handleNotificationTap;
+    _pendingNotificationPayload = NotificationService().consumeLaunchPayload();
 
     // Check if we need to request location permissions
     await _checkLocationPermissions();
@@ -81,6 +85,14 @@ class _MeshCoreSarAppState extends State<MeshCoreSarApp> {
       _wizardCompleted = wizardCompleted;
       _isInitialized = true;
     });
+
+    if (_pendingNotificationPayload != null) {
+      WidgetsBinding.instance.addPostFrameCallback((_) {
+        final payload = _pendingNotificationPayload;
+        _pendingNotificationPayload = null;
+        _handleNotificationTap(payload);
+      });
+    }
   }
 
   /// Handle notification tap
@@ -89,10 +101,27 @@ class _MeshCoreSarAppState extends State<MeshCoreSarApp> {
 
     debugPrint('[Main] Notification tapped: $payload');
 
+    if (!_wizardCompleted) {
+      _pendingNotificationPayload = payload;
+      return;
+    }
+
     // Handle update notification tap
     if (payload.startsWith('update:')) {
       final downloadUrl = payload.substring(7); // Remove 'update:' prefix
       _launchUpdateDownload(downloadUrl);
+      return;
+    }
+
+    if (payload.startsWith('discovery:')) {
+      final navigator = _navigatorKey.currentState;
+      if (navigator == null) {
+        _pendingNotificationPayload = payload;
+        return;
+      }
+      navigator.push(
+        MaterialPageRoute(builder: (context) => const DiscoveryScreen()),
+      );
     }
     // SAR and message notifications handled by their respective providers
   }
@@ -304,6 +333,7 @@ class _MeshCoreSarAppState extends State<MeshCoreSarApp> {
       builder: (context) {
         final systemBrightness = MediaQuery.platformBrightnessOf(context);
         final materialApp = MaterialApp(
+          navigatorKey: _navigatorKey,
           key: ValueKey<String?>(
             '${_locale?.languageCode ?? 'system'}_${_themeMode.name}',
           ),

lib/models/contact_group.dart

@@ -0,0 +1,39 @@
+class SavedContactGroup {
+  final String id;
+  final String sectionKey;
+  final String label;
+  final String query;
+  final DateTime createdAt;
+  final List<String>? matchPrefixes;
+  final bool isAutoGroup;
+
+  const SavedContactGroup({
+    required this.id,
+    required this.sectionKey,
+    required this.label,
+    required this.query,
+    required this.createdAt,
+    this.matchPrefixes,
+    this.isAutoGroup = false,
+  });
+
+  SavedContactGroup copyWith({
+    String? id,
+    String? sectionKey,
+    String? label,
+    String? query,
+    DateTime? createdAt,
+    List<String>? matchPrefixes,
+    bool? isAutoGroup,
+  }) {
+    return SavedContactGroup(
+      id: id ?? this.id,
+      sectionKey: sectionKey ?? this.sectionKey,
+      label: label ?? this.label,
+      query: query ?? this.query,
+      createdAt: createdAt ?? this.createdAt,
+      matchPrefixes: matchPrefixes ?? this.matchPrefixes,
+      isAutoGroup: isAutoGroup ?? this.isAutoGroup,
+    );
+  }
+}

lib/models/device_info.dart

@@ -14,9 +14,6 @@ enum ConnectionMode {
   /// Direct BLE connection to MeshCore device (default)
   ble,
 
-  /// Act as SSE server - share BLE device with multiple clients
-  sseServer,
-
   /// Direct TCP/WiFi connection to MeshCore device (port 5000)
   tcp,
 }
@@ -26,8 +23,6 @@ extension ConnectionModeExtension on ConnectionMode {
     switch (this) {
       case ConnectionMode.ble:
         return 'Direct (BLE)';
-      case ConnectionMode.sseServer:
-        return 'Share Device (Server)';
       case ConnectionMode.tcp:
         return 'Direct (WiFi)';
     }
@@ -37,8 +32,6 @@ extension ConnectionModeExtension on ConnectionMode {
     switch (this) {
       case ConnectionMode.ble:
         return 'Direct BLE connection to MeshCore device';
-      case ConnectionMode.sseServer:
-        return 'Share BLE device with multiple clients over network';
       case ConnectionMode.tcp:
         return 'Direct WiFi/TCP connection to MeshCore device';
     }
@@ -66,6 +59,11 @@ class DeviceInfo {
   final int? advLat;
   final int? advLon;
   final bool? manualAddContacts;
+  final bool? autoAddUsers;
+  final bool? autoAddRepeaters;
+  final bool? autoAddRoomServers;
+  final bool? autoAddSensors;
+  final bool? autoAddOverwriteOldest;
   final int? radioFreq;
   final int? radioBw;
   final int? radioSf;
@@ -113,6 +111,11 @@ class DeviceInfo {
     this.advLat,
     this.advLon,
     this.manualAddContacts,
+    this.autoAddUsers,
+    this.autoAddRepeaters,
+    this.autoAddRoomServers,
+    this.autoAddSensors,
+    this.autoAddOverwriteOldest,
     this.radioFreq,
     this.radioBw,
     this.radioSf,
@@ -239,6 +242,11 @@ class DeviceInfo {
     int? advLat,
     int? advLon,
     bool? manualAddContacts,
+    bool? autoAddUsers,
+    bool? autoAddRepeaters,
+    bool? autoAddRoomServers,
+    bool? autoAddSensors,
+    bool? autoAddOverwriteOldest,
     int? radioFreq,
     int? radioBw,
     int? radioSf,
@@ -278,6 +286,12 @@ class DeviceInfo {
       advLat: advLat ?? this.advLat,
       advLon: advLon ?? this.advLon,
       manualAddContacts: manualAddContacts ?? this.manualAddContacts,
+      autoAddUsers: autoAddUsers ?? this.autoAddUsers,
+      autoAddRepeaters: autoAddRepeaters ?? this.autoAddRepeaters,
+      autoAddRoomServers: autoAddRoomServers ?? this.autoAddRoomServers,
+      autoAddSensors: autoAddSensors ?? this.autoAddSensors,
+      autoAddOverwriteOldest:
+          autoAddOverwriteOldest ?? this.autoAddOverwriteOldest,
       radioFreq: radioFreq ?? this.radioFreq,
       radioBw: radioBw ?? this.radioBw,
       radioSf: radioSf ?? this.radioSf,

lib/models/message_reception_details.dart

@@ -30,6 +30,7 @@ class MessageReceptionDetails {
   final int? senderToReceiptMs;
   final int? estimatedTransmitMs;
   final int? postTransmitDelayMs;
+  final int receivedCopies;
 
   const MessageReceptionDetails({
     required this.capturedAt,
@@ -40,6 +41,7 @@ class MessageReceptionDetails {
     this.senderToReceiptMs,
     this.estimatedTransmitMs,
     this.postTransmitDelayMs,
+    this.receivedCopies = 1,
   });
 
   String? get pathBytesHex => pathBytes == null || pathBytes!.isEmpty
@@ -56,9 +58,60 @@ class MessageReceptionDetails {
       'senderToReceiptMs': senderToReceiptMs,
       'estimatedTransmitMs': estimatedTransmitMs,
       'postTransmitDelayMs': postTransmitDelayMs,
+      'receivedCopies': receivedCopies,
     };
   }
 
+  MessageReceptionDetails copyWith({
+    DateTime? capturedAt,
+    DateTime? packetLoggedAt,
+    int? rssiDbm,
+    double? snrDb,
+    List<int>? pathBytes,
+    int? senderToReceiptMs,
+    int? estimatedTransmitMs,
+    int? postTransmitDelayMs,
+    int? receivedCopies,
+  }) {
+    return MessageReceptionDetails(
+      capturedAt: capturedAt ?? this.capturedAt,
+      packetLoggedAt: packetLoggedAt ?? this.packetLoggedAt,
+      rssiDbm: rssiDbm ?? this.rssiDbm,
+      snrDb: snrDb ?? this.snrDb,
+      pathBytes: pathBytes ?? this.pathBytes,
+      senderToReceiptMs: senderToReceiptMs ?? this.senderToReceiptMs,
+      estimatedTransmitMs: estimatedTransmitMs ?? this.estimatedTransmitMs,
+      postTransmitDelayMs: postTransmitDelayMs ?? this.postTransmitDelayMs,
+      receivedCopies: receivedCopies ?? this.receivedCopies,
+    );
+  }
+
+  static MessageReceptionDetails mergeDuplicate({
+    MessageReceptionDetails? existing,
+    MessageReceptionDetails? incoming,
+  }) {
+    final base =
+        existing ??
+        incoming ??
+        MessageReceptionDetails(capturedAt: DateTime.now());
+
+    return base.copyWith(
+      capturedAt: incoming?.capturedAt ?? existing?.capturedAt,
+      packetLoggedAt: incoming?.packetLoggedAt ?? existing?.packetLoggedAt,
+      rssiDbm: incoming?.rssiDbm ?? existing?.rssiDbm,
+      snrDb: incoming?.snrDb ?? existing?.snrDb,
+      pathBytes: incoming?.pathBytes ?? existing?.pathBytes,
+      senderToReceiptMs:
+          incoming?.senderToReceiptMs ?? existing?.senderToReceiptMs,
+      estimatedTransmitMs:
+          incoming?.estimatedTransmitMs ?? existing?.estimatedTransmitMs,
+      postTransmitDelayMs:
+          incoming?.postTransmitDelayMs ?? existing?.postTransmitDelayMs,
+      receivedCopies:
+          (existing?.receivedCopies ?? 1) + (incoming?.receivedCopies ?? 1),
+    );
+  }
+
   static MessageReceptionDetails? fromJson(Map<String, dynamic> json) {
     final capturedAtMillis = json['capturedAtMillis'];
     if (capturedAtMillis is! int) {
@@ -81,6 +134,7 @@ class MessageReceptionDetails {
       senderToReceiptMs: json['senderToReceiptMs'] as int?,
       estimatedTransmitMs: json['estimatedTransmitMs'] as int?,
       postTransmitDelayMs: json['postTransmitDelayMs'] as int?,
+      receivedCopies: json['receivedCopies'] as int? ?? 1,
     );
   }
 }

lib/models/path_history.dart

@@ -1,7 +1,10 @@
+enum PathRecordSource { learned, observed }
+
 class PathRecord {
   final List<int> pathBytes;
   final int hopCount;
   final int hashSize;
+  final PathRecordSource source;
   final int successCount;
   final int failureCount;
   final int lastRoundTripTimeMs;
@@ -11,6 +14,7 @@ class PathRecord {
     required this.pathBytes,
     required this.hopCount,
     required this.hashSize,
+    required this.source,
     required this.successCount,
     required this.failureCount,
     required this.lastRoundTripTimeMs,
@@ -27,6 +31,7 @@ class PathRecord {
     List<int>? pathBytes,
     int? hopCount,
     int? hashSize,
+    PathRecordSource? source,
     int? successCount,
     int? failureCount,
     int? lastRoundTripTimeMs,
@@ -36,6 +41,7 @@ class PathRecord {
       pathBytes: pathBytes ?? this.pathBytes,
       hopCount: hopCount ?? this.hopCount,
       hashSize: hashSize ?? this.hashSize,
+      source: source ?? this.source,
       successCount: successCount ?? this.successCount,
       failureCount: failureCount ?? this.failureCount,
       lastRoundTripTimeMs: lastRoundTripTimeMs ?? this.lastRoundTripTimeMs,
@@ -48,6 +54,7 @@ class PathRecord {
       'path_bytes': pathBytes,
       'hop_count': hopCount,
       'hash_size': hashSize,
+      'source': source.name,
       'success_count': successCount,
       'failure_count': failureCount,
       'last_round_trip_time_ms': lastRoundTripTimeMs,
@@ -62,6 +69,10 @@ class PathRecord {
           .toList(),
       hopCount: json['hop_count'] as int? ?? 0,
       hashSize: json['hash_size'] as int? ?? 1,
+      source: PathRecordSource.values.firstWhere(
+        (value) => value.name == (json['source'] as String? ?? 'learned'),
+        orElse: () => PathRecordSource.learned,
+      ),
       successCount: json['success_count'] as int? ?? 0,
       failureCount: json['failure_count'] as int? ?? 0,
       lastRoundTripTimeMs: json['last_round_trip_time_ms'] as int? ?? 0,
@@ -163,6 +174,10 @@ class ContactPathHistory {
     };
   }
 
+  List<PathRecord> get observedPaths => directPaths
+      .where((record) => record.source == PathRecordSource.observed)
+      .toList();
+
   factory ContactPathHistory.fromJson(
     String contactPublicKeyHex,
     Map<String, dynamic> json,

lib/models/sse_server_config.dart

@@ -1,71 +0,0 @@
-/// SSE Server Configuration Model
-///
-/// Configuration for the SSE (Server-Sent Events) web server that enables
-/// multiple app instances to share a single MeshCore BLE device.
-class SseServerConfig {
-  /// Server bind address (e.g., "0.0.0.0" for all interfaces, "127.0.0.1" for localhost)
-  final String host;
-
-  /// Server port (default: 12929)
-  final int port;
-
-  /// Whether the SSE server is enabled
-  final bool enabled;
-
-  /// Optional authentication token for basic security
-  /// Clients must include this token in Authorization header
-  final String? authToken;
-
-  const SseServerConfig({
-    this.host = '0.0.0.0',
-    this.port = 12929,
-    this.enabled = false,
-    this.authToken,
-  });
-
-  /// Create a copy with updated fields
-  SseServerConfig copyWith({
-    String? host,
-    int? port,
-    bool? enabled,
-    String? authToken,
-  }) {
-    return SseServerConfig(
-      host: host ?? this.host,
-      port: port ?? this.port,
-      enabled: enabled ?? this.enabled,
-      authToken: authToken ?? this.authToken,
-    );
-  }
-
-  /// Get server URL for clients to connect to
-  String getServerUrl({String? ipAddress}) {
-    final ip = ipAddress ?? host;
-    return 'http://$ip:$port';
-  }
-
-  /// Convert to JSON for persistence
-  Map<String, dynamic> toJson() {
-    return {
-      'host': host,
-      'port': port,
-      'enabled': enabled,
-      'authToken': authToken,
-    };
-  }
-
-  /// Create from JSON
-  factory SseServerConfig.fromJson(Map<String, dynamic> json) {
-    return SseServerConfig(
-      host: json['host'] as String? ?? '0.0.0.0',
-      port: json['port'] as int? ?? 12929,
-      enabled: json['enabled'] as bool? ?? false,
-      authToken: json['authToken'] as String?,
-    );
-  }
-
-  @override
-  String toString() {
-    return 'SseServerConfig(host: $host, port: $port, enabled: $enabled, hasAuth: ${authToken != null})';
-  }
-}

lib/providers/drawing_provider.dart

@@ -11,6 +11,8 @@ enum DrawingMode { none, line, rectangle, measure }
 /// Provider for managing map drawings
 class DrawingProvider with ChangeNotifier {
   static const String _storageKey = 'map_drawings';
+  static const String _showReceivedDrawingsKey = 'map_show_received_drawings';
+  static const String _showSarMarkersKey = 'map_show_sar_markers';
 
   // Drawing state
   DrawingMode _drawingMode = DrawingMode.none;
@@ -20,6 +22,7 @@ class DrawingProvider with ChangeNotifier {
 
   // Completed drawings
   final List<MapDrawing> _drawings = [];
+  bool _isInitialized = false;
 
   // In-progress drawing
   MapDrawing? _currentDrawing;
@@ -51,13 +54,16 @@ class DrawingProvider with ChangeNotifier {
   List<LatLng> get currentLinePoints => List.unmodifiable(_currentLinePoints);
   LatLng? get rectangleStartPoint => _rectangleStartPoint;
   bool get isDrawing => _drawingMode != DrawingMode.none;
+  bool get isInitialized => _isInitialized;
   LatLng? get measurementPoint1 => _measurementPoint1;
   LatLng? get measurementPoint2 => _measurementPoint2;
   double? get measuredDistance => _measuredDistance;
 
   /// Initialize and load saved drawings
   Future<void> initialize() async {
+    await _loadPreferences();
     await _loadDrawings();
+    _isInitialized = true;
   }
 
   /// Set drawing mode
@@ -77,15 +83,30 @@ class DrawingProvider with ChangeNotifier {
   }
 
   /// Toggle visibility of received drawings
-  void toggleReceivedDrawings() {
+  Future<void> toggleReceivedDrawings() async {
     _showReceivedDrawings = !_showReceivedDrawings;
     notifyListeners();
+    await _savePreferences();
   }
 
   /// Toggle visibility of SAR markers
-  void toggleSarMarkers() {
+  Future<void> toggleSarMarkers() async {
     _showSarMarkers = !_showSarMarkers;
     notifyListeners();
+    await _savePreferences();
+  }
+
+  Future<void> _loadPreferences() async {
+    final prefs = await SharedPreferences.getInstance();
+    _showReceivedDrawings = prefs.getBool(_showReceivedDrawingsKey) ?? true;
+    _showSarMarkers = prefs.getBool(_showSarMarkersKey) ?? true;
+    notifyListeners();
+  }
+
+  Future<void> _savePreferences() async {
+    final prefs = await SharedPreferences.getInstance();
+    await prefs.setBool(_showReceivedDrawingsKey, _showReceivedDrawings);
+    await prefs.setBool(_showSarMarkersKey, _showSarMarkers);
   }
 
   /// Start drawing a line

lib/providers/helpers/message_delivery_tracker.dart

@@ -1,3 +1,4 @@
+import 'dart:async';
 import 'dart:typed_data';
 
 /// Message delivery tracking helper
@@ -30,6 +31,9 @@ class MessageDeliveryTracker {
   /// Map of ACK tag to timestamp for timeout cleanup
   final Map<int, DateTime> _ackTagTimestamps = {};
 
+  /// Completer signalled when a pending ACK slot is freed (delivery or removal).
+  Completer<void>? _slotFreedCompleter;
+
   /// Track a pending message ID before sending
   ///
   /// This is called BEFORE sending the message. When RESP_CODE_SENT
@@ -112,6 +116,7 @@ class MessageDeliveryTracker {
       _messageIdToAckTag.remove(messageId);
     }
     _ackTagTimestamps.remove(ackCode);
+    _notifySlotFreed();
   }
 
   /// Remove ACK tag mapping by message ID
@@ -122,6 +127,7 @@ class MessageDeliveryTracker {
     if (ackTag != null) {
       _ackTagToMessageId.remove(ackTag);
       _ackTagTimestamps.remove(ackTag);
+      _notifySlotFreed();
     }
     _pendingMessageIds.remove(messageId);
     final emptyKeys = <String>[];
@@ -166,6 +172,7 @@ class MessageDeliveryTracker {
     _ackTagToMessageId.clear();
     _messageIdToAckTag.clear();
     _ackTagTimestamps.clear();
+    _notifySlotFreed();
   }
 
   /// Get count of pending ACK tags
@@ -179,6 +186,27 @@ class MessageDeliveryTracker {
   /// Returns true if >= 7 pending ACKs (stay under firmware limit of 8)
   bool get shouldRateLimit => pendingCount >= 7;
 
+  /// Wait until a pending ACK slot is freed, or [timeout] elapses.
+  ///
+  /// Returns immediately if not at the rate limit.
+  Future<void> waitForSlot({
+    Duration timeout = const Duration(milliseconds: 500),
+  }) async {
+    if (!shouldRateLimit) return;
+    _slotFreedCompleter ??= Completer<void>();
+    await _slotFreedCompleter!.future.timeout(
+      timeout,
+      onTimeout: () {},
+    );
+  }
+
+  void _notifySlotFreed() {
+    if (_slotFreedCompleter != null && !_slotFreedCompleter!.isCompleted) {
+      _slotFreedCompleter!.complete();
+    }
+    _slotFreedCompleter = null;
+  }
+
   /// Get oldest pending ACK timestamp (for debugging)
   DateTime? get oldestPendingTimestamp {
     if (_ackTagTimestamps.isEmpty) return null;

lib/providers/map_provider.dart

@@ -1,3 +1,5 @@
+import 'dart:async';
+
 import 'package:flutter/foundation.dart';
 import 'package:flutter_map/flutter_map.dart';
 import 'package:latlong2/latlong.dart';
@@ -6,6 +8,10 @@ import '../models/location_trail.dart';
 import '../models/map_drawing.dart';
 
 class MapProvider with ChangeNotifier {
+  MapProvider() {
+    unawaited(_loadInitialState());
+  }
+
   LatLng? _targetLocation;
   double? _targetZoom;
   bool _shouldAnimate = false;
@@ -33,6 +39,7 @@ class MapProvider with ChangeNotifier {
 
   // Contact trail toggles
   bool _showAllContactTrails = true; // Default to showing all contact trails
+  bool _hideRepeatersOnMap = false;
 
   // Imported trail (from GPX)
   LocationTrail? _importedTrail;
@@ -67,6 +74,7 @@ class MapProvider with ChangeNotifier {
 
   // Contact trail getters
   bool get showAllContactTrails => _showAllContactTrails;
+  bool get hideRepeatersOnMap => _hideRepeatersOnMap;
 
   // Imported trail getters
   LocationTrail? get importedTrail => _importedTrail;
@@ -350,6 +358,11 @@ class MapProvider with ChangeNotifier {
     notifyListeners();
   }
 
+  Future<void> _loadInitialState() async {
+    await Future.wait([loadOverlayState(), loadTrailSettings()]);
+    await loadRepeaterVisibilitySettings();
+  }
+
   /// Save overlay state to SharedPreferences
   Future<void> _saveOverlayState() async {
     final prefs = await SharedPreferences.getInstance();
@@ -386,6 +399,20 @@ class MapProvider with ChangeNotifier {
     await prefs.setBool('map_show_all_contact_trails', _showAllContactTrails);
   }
 
+  Future<void> setHideRepeatersOnMap(bool hide) async {
+    if (_hideRepeatersOnMap == hide) return;
+    _hideRepeatersOnMap = hide;
+    notifyListeners();
+    final prefs = await SharedPreferences.getInstance();
+    await prefs.setBool('map_hide_repeaters', _hideRepeatersOnMap);
+  }
+
+  Future<void> loadRepeaterVisibilitySettings() async {
+    final prefs = await SharedPreferences.getInstance();
+    _hideRepeatersOnMap = prefs.getBool('map_hide_repeaters') ?? false;
+    notifyListeners();
+  }
+
   /// Set imported trail (from GPX import)
   void setImportedTrail(LocationTrail trail) {
     _importedTrail = trail;

lib/providers/messages_provider.dart

@@ -18,13 +18,20 @@ import '../utils/image_message_parser.dart';
 import '../l10n/app_localizations.dart';
 import 'helpers/message_retry_manager.dart';
 
+typedef DisplayMessageEntry = ({Message message, int occurrenceCount});
+
 /// Messages Provider - manages message history and SAR markers
 class MessagesProvider with ChangeNotifier {
+  static const Duration _channelEchoWarningDelay = Duration(seconds: 12);
+
   final List<Message> _messages = [];
   final Map<String, SarMarker> _sarMarkers = {};
+  final Set<String> _removedSarMarkerIds = <String>{};
   final MessageStorageService _storageService = MessageStorageService();
   final NotificationService _notificationService = NotificationService();
   bool _isInitialized = false;
+  bool _isPersisting = false;
+  bool _persistRequested = false;
   AppLocalizations? _localizations;
   final Map<String, MessageContactLocation> _messageContactLocations = {};
   final Map<String, MessageReceptionDetails> _messageReceptionDetails = {};
@@ -37,6 +44,8 @@ class MessagesProvider with ChangeNotifier {
   // Track timeout timers for pending messages
   // Key: message ID (not ACK tag, since multiple messages can share same ACK)
   final Map<String, Timer> _timeoutTimers = {};
+  final Map<String, Timer> _channelEchoWarningTimers = {};
+  final Set<String> _channelEchoWarningMessageIds = <String>{};
 
   // Recently completed ACKs are kept briefly to ignore duplicate confirms.
   final Map<int, DateTime> _completedAckHistory = {};
@@ -86,6 +95,7 @@ class MessagesProvider with ChangeNotifier {
 
   Future<void> Function({required Contact contact, required int failureStreak})?
   onDirectPathFailedCallback;
+  void Function(String messageId)? onManualRetryPreparedCallback;
   Future<bool> Function({
     required String messageId,
     required Contact contact,
@@ -124,6 +134,7 @@ class MessagesProvider with ChangeNotifier {
       _messages.where((m) => m.isSystemMessage).toList();
 
   List<SarMarker> get sarMarkers => _sarMarkers.values.toList();
+  Set<String> get removedSarMarkerIds => Set.unmodifiable(_removedSarMarkerIds);
 
   List<SarMarker> get foundPersonMarkers =>
       sarMarkers.where((m) => m.type == SarMarkerType.foundPerson).toList();
@@ -153,6 +164,9 @@ class MessagesProvider with ChangeNotifier {
   MessageRouteMetadata? getMessageRouteMetadata(String messageId) =>
       _messageRouteMetadata[messageId];
 
+  bool hasChannelSendWarning(String messageId) =>
+      _channelEchoWarningMessageIds.contains(messageId);
+
   void updateMessageRouteSelection(
     String messageId,
     PathSelection selection, {
@@ -165,8 +179,12 @@ class MessagesProvider with ChangeNotifier {
 
     final index = _messages.indexWhere((message) => message.id == messageId);
     if (index != -1) {
+      final nextPathLen = selection.hopCount > 0
+          ? selection.hopCount
+          : _messages[index].pathLen;
       _messages[index] = _messages[index].copyWith(
         usedFloodFallback: selection.usesFlood,
+        pathLen: nextPathLen,
       );
     }
 
@@ -239,6 +257,17 @@ class MessagesProvider with ChangeNotifier {
       )
       .length;
 
+  int getUnreadCountForChannel(int channelIdx) => _messages
+      .where(
+        (message) =>
+            message.isChannelMessage &&
+            (message.channelIdx ?? 0) == channelIdx &&
+            !message.isRead &&
+            !message.isSentMessage &&
+            !message.isSystemMessage,
+      )
+      .length;
+
   bool _isMessageForDestination(Message message, Contact contact) {
     if (message.isSystemMessage) return false;
 
@@ -293,6 +322,8 @@ class MessagesProvider with ChangeNotifier {
           .loadMessageTransferDetails();
       final storedRouteMetadata = await _storageService
           .loadMessageRouteMetadata();
+      final storedRemovedSarMarkerIds = await _storageService
+          .loadRemovedSarMarkerIds();
       _messageContactLocations
         ..clear()
         ..addAll(storedContactLocations);
@@ -305,6 +336,9 @@ class MessagesProvider with ChangeNotifier {
       _messageRouteMetadata
         ..clear()
         ..addAll(storedRouteMetadata);
+      _removedSarMarkerIds
+        ..clear()
+        ..addAll(storedRemovedSarMarkerIds);
 
       // Add stored messages with enhancement to ensure SAR detection
       for (final message in storedMessages) {
@@ -352,7 +386,7 @@ class MessagesProvider with ChangeNotifier {
         // Extract SAR markers
         if (enhancedMessage.isSarMarker) {
           final marker = enhancedMessage.toSarMarker();
-          if (marker != null) {
+          if (marker != null && !_removedSarMarkerIds.contains(marker.id)) {
             _sarMarkers[marker.id] = marker;
           }
         }
@@ -493,6 +527,7 @@ class MessagesProvider with ChangeNotifier {
         );
       }
     }
+    enhancedMessage = _resolveSenderNameIfNeeded(enhancedMessage);
 
     // For channel messages with sender name, try to link with contact
     Message finalMessage = enhancedMessage;
@@ -518,6 +553,15 @@ class MessagesProvider with ChangeNotifier {
       }
     }
 
+    final incomingPathBytes = receptionDetailsSnapshot?.pathBytes;
+    if (incomingPathBytes != null &&
+        incomingPathBytes.isNotEmpty &&
+        finalMessage.pathBytes == null) {
+      finalMessage = finalMessage.copyWith(
+        pathBytes: Uint8List.fromList(incomingPathBytes),
+      );
+    }
+
     // Debug: Check if message is SAR
     if (message.text.startsWith('S:')) {
       debugPrint(
@@ -532,29 +576,40 @@ class MessagesProvider with ChangeNotifier {
     // - Mesh network retransmissions
     // - Multiple paths in the network
     // - Syncing messages from device queue
-    if (_isDuplicate(finalMessage)) {
+    final duplicateIndex = _findDuplicateMessageIndex(finalMessage);
+    if (duplicateIndex != -1) {
       debugPrint(
         '⚠️ [MessagesProvider] Duplicate message detected, skipping: ${finalMessage.id}',
       );
       debugPrint(
         '   Text: ${finalMessage.text.substring(0, finalMessage.text.length > 50 ? 50 : finalMessage.text.length)}...',
       );
-      final existingIndex = _messages.indexWhere(
-        (existing) =>
-            existing.messageType == finalMessage.messageType &&
-            existing.senderTimestamp == finalMessage.senderTimestamp &&
-            existing.text == finalMessage.text,
-      );
-      if (existingIndex != -1) {
-        final existingId = _messages[existingIndex].id;
-        if (contactLocationSnapshot != null) {
-          _messageContactLocations[existingId] = contactLocationSnapshot;
-        }
-        if (receptionDetailsSnapshot != null) {
-          _messageReceptionDetails[existingId] = receptionDetailsSnapshot;
-        }
-        _persistMessages();
+      final existingId = _messages[duplicateIndex].id;
+      if (finalMessage.isChannelMessage &&
+          !finalMessage.isSentMessage &&
+          _messages[duplicateIndex].isSentMessage) {
+        _clearChannelSendWarning(existingId);
       }
+      if (contactLocationSnapshot != null) {
+        _messageContactLocations[existingId] = contactLocationSnapshot;
+      }
+      _messageReceptionDetails[existingId] =
+          MessageReceptionDetails.mergeDuplicate(
+            existing: _messageReceptionDetails[existingId],
+            incoming: receptionDetailsSnapshot,
+          );
+      if (receptionDetailsSnapshot != null) {
+        final existingMessage = _messages[duplicateIndex];
+        final duplicatePathBytes = receptionDetailsSnapshot.pathBytes;
+        if (existingMessage.pathBytes == null &&
+            duplicatePathBytes != null &&
+            duplicatePathBytes.isNotEmpty) {
+          _messages[duplicateIndex] = existingMessage.copyWith(
+            pathBytes: Uint8List.fromList(duplicatePathBytes),
+          );
+        }
+      }
+      _persistMessages();
       return; // Skip duplicate
     }
 
@@ -569,7 +624,7 @@ class MessagesProvider with ChangeNotifier {
     // If it's a SAR marker message, extract and store the marker
     if (finalMessage.isSarMarker) {
       final marker = finalMessage.toSarMarker();
-      if (marker != null) {
+      if (marker != null && !_removedSarMarkerIds.contains(marker.id)) {
         _sarMarkers[marker.id] = marker;
 
         // Trigger urgent notification for received SAR messages (not sent by user)
@@ -593,50 +648,101 @@ class MessagesProvider with ChangeNotifier {
   /// Messages are considered duplicates if they have:
   /// 1. Same sender public key prefix (for contact messages)
   /// 2. Same channel index (for channel messages)
-  /// 3. Same sender timestamp
-  /// 4. Same text content
+  /// 3. Same text content
   ///
   /// Note: Sent messages (isSentMessage=true) are NEVER duplicates
   /// because they can be retried with different message IDs
-  bool _isDuplicate(Message message) {
+  int _findDuplicateMessageIndex(Message message) {
     // Sent messages (our own messages) should never be considered duplicates
     // They can be retried multiple times with different IDs
     if (message.isSentMessage) {
+      return -1;
+    }
+
+    for (int index = 0; index < _messages.length; index++) {
+      final existing = _messages[index];
+      if (!_matchesDuplicateScope(existing, message) ||
+          existing.text != message.text) {
+        continue;
+      }
+      if (message.isChannelMessage) {
+        debugPrint(
+          '🔁 [MessagesProvider] Channel duplicate match: '
+          'incoming(id=${message.id}, senderName=${message.senderName ?? "-"}, senderKey=${message.senderKeyShort ?? "-"}, pathLen=${message.pathLen}, ts=${message.senderTimestamp}) '
+          'existing(id=${existing.id}, sent=${existing.isSentMessage}, senderName=${existing.senderName ?? "-"}, senderKey=${existing.senderKeyShort ?? "-"}, pathLen=${existing.pathLen}, ts=${existing.senderTimestamp})',
+        );
+      }
+      return index;
+    }
+
+    return -1;
+  }
+
+  bool _matchesDuplicateScope(Message existing, Message message) {
+    if (existing.messageType != message.messageType) {
       return false;
     }
 
-    return _messages.any((existing) {
-      // Check message type matches
-      if (existing.messageType != message.messageType) {
+    if (message.isContactMessage) {
+      return existing.senderKeyShort == message.senderKeyShort;
+    }
+
+    if (message.isChannelMessage) {
+      if (existing.channelIdx != message.channelIdx) {
         return false;
       }
 
-      // Check sender matches
-      if (message.isContactMessage) {
-        // For contact messages, compare sender public key prefix
-        if (existing.senderKeyShort != message.senderKeyShort) {
+      final withinChannelRepeatWindow =
+          (existing.senderTimestamp - message.senderTimestamp).abs() <= 30;
+
+      final existingSenderKey = existing.senderKeyShort;
+      final incomingSenderKey = message.senderKeyShort;
+      if (existingSenderKey != null &&
+          incomingSenderKey != null &&
+          existingSenderKey == incomingSenderKey &&
+          withinChannelRepeatWindow) {
+        return true;
+      }
+
+      final existingSenderName = _normalizedResolvedSenderName(existing);
+      final incomingSenderName = _normalizedResolvedSenderName(message);
+      if (existing.isChannelMessage && message.isChannelMessage) {
+        debugPrint(
+          '🧪 [MessagesProvider] Channel dedupe check: '
+          'existing(id=${existing.id}, sent=${existing.isSentMessage}, senderName=${existing.senderName ?? "-"}, resolvedSender=${existingSenderName ?? "-"}, senderKey=${existing.senderKeyShort ?? "-"}, ts=${existing.senderTimestamp}, pathLen=${existing.pathLen}) '
+          'incoming(id=${message.id}, sent=${message.isSentMessage}, senderName=${message.senderName ?? "-"}, resolvedSender=${incomingSenderName ?? "-"}, senderKey=${message.senderKeyShort ?? "-"}, ts=${message.senderTimestamp}, pathLen=${message.pathLen}) '
+          'withinWindow=$withinChannelRepeatWindow',
+        );
+      }
+      if (existingSenderName != null &&
+          incomingSenderName != null &&
+          existingSenderName == incomingSenderName) {
+        if (!existing.isSentMessage && !message.isSentMessage) {
+          return withinChannelRepeatWindow;
+        }
+
+        if (!withinChannelRepeatWindow) {
           return false;
         }
-      } else if (message.isChannelMessage) {
-        // For channel messages, compare channel index
-        if (existing.channelIdx != message.channelIdx) {
-          return false;
+
+        // Mirror meshcore-open behavior for self-authored channel messages:
+        // zero-hop self replays are dropped earlier in AppProvider, while
+        // routed self replays should fold into the local sent bubble when the
+        // public sender name matches within a short window.
+        if (existing.isSentMessage &&
+            !message.isSentMessage &&
+            existingSenderName == incomingSenderName) {
+          return true;
         }
+
+        return true;
       }
 
-      // Check timestamp matches (sender timestamp is the unique identifier from the sender)
-      if (existing.senderTimestamp != message.senderTimestamp) {
-        return false;
-      }
+      return false;
+    }
 
-      // Check text content matches
-      if (existing.text != message.text) {
-        return false;
-      }
-
-      // All criteria match - this is a duplicate
-      return true;
-    });
+    // System messages and other types: never deduplicate by scope alone.
+    return false;
   }
 
   /// Add multiple messages
@@ -646,10 +752,42 @@ class MessagesProvider with ChangeNotifier {
 
     for (final message in messages) {
       // Always enhance message with SAR parser to detect SAR markers
-      final enhancedMessage = SarMessageParser.enhanceMessage(message);
+      var enhancedMessage = SarMessageParser.enhanceMessage(message);
+
+      // Check if it's a drawing message (D:...) and not already marked
+      if (DrawingMessageParser.isDrawingMessage(enhancedMessage.text) &&
+          !enhancedMessage.isDrawing) {
+        final drawing = DrawingMessageParser.parseDrawingMessage(
+          enhancedMessage.text,
+          senderName: enhancedMessage.senderName,
+          messageId: enhancedMessage.id,
+        );
+        enhancedMessage = enhancedMessage.copyWith(
+          isDrawing: true,
+          drawingId: drawing?.id,
+        );
+      }
+
+      // Check if it's a voice message and not already marked
+      if (!enhancedMessage.isVoice) {
+        final envelope = VoiceEnvelope.tryParseText(enhancedMessage.text);
+        if (envelope != null) {
+          enhancedMessage = enhancedMessage.copyWith(
+            isVoice: true,
+            voiceId: envelope.sessionId,
+          );
+        }
+      }
+      enhancedMessage = _resolveSenderNameIfNeeded(enhancedMessage);
 
       // Check for duplicates
-      if (_isDuplicate(enhancedMessage)) {
+      final duplicateIndex = _findDuplicateMessageIndex(enhancedMessage);
+      if (duplicateIndex != -1) {
+        final existingId = _messages[duplicateIndex].id;
+        _messageReceptionDetails[existingId] =
+            MessageReceptionDetails.mergeDuplicate(
+              existing: _messageReceptionDetails[existingId],
+            );
         duplicateCount++;
         continue; // Skip duplicate
       }
@@ -659,7 +797,7 @@ class MessagesProvider with ChangeNotifier {
 
       if (enhancedMessage.isSarMarker) {
         final marker = enhancedMessage.toSarMarker();
-        if (marker != null) {
+        if (marker != null && !_removedSarMarkerIds.contains(marker.id)) {
           _sarMarkers[marker.id] = marker;
         }
       }
@@ -675,6 +813,80 @@ class MessagesProvider with ChangeNotifier {
     notifyListeners();
   }
 
+  String? _normalizeSenderName(String? value) {
+    final trimmed = value?.trim();
+    if (trimmed == null || trimmed.isEmpty) {
+      return null;
+    }
+
+    var normalized = trimmed.toLowerCase();
+    if (normalized.startsWith('meshcore-')) {
+      normalized = normalized.substring('meshcore-'.length).trim();
+    }
+
+    return normalized.isEmpty ? null : normalized;
+  }
+
+  Message _resolveSenderNameIfNeeded(Message message) {
+    if (message.senderName != null || message.senderPublicKeyPrefix == null) {
+      return message;
+    }
+
+    final resolvedSenderName = resolveContactNameCallback?.call(
+      message.senderPublicKeyPrefix,
+    );
+    if (resolvedSenderName == null || resolvedSenderName.trim().isEmpty) {
+      return message;
+    }
+
+    return message.copyWith(senderName: resolvedSenderName.trim());
+  }
+
+  String? _normalizedResolvedSenderName(Message message) {
+    final directName = _normalizeSenderName(message.senderName);
+    if (directName != null) {
+      return directName;
+    }
+
+    if (message.senderPublicKeyPrefix == null) {
+      return null;
+    }
+
+    final resolved = resolveContactNameCallback?.call(
+      message.senderPublicKeyPrefix,
+    );
+    return _normalizeSenderName(resolved);
+  }
+
+  void _scheduleChannelEchoWarning(String messageId) {
+    _channelEchoWarningTimers[messageId]?.cancel();
+    _channelEchoWarningMessageIds.remove(messageId);
+    _channelEchoWarningTimers[messageId] = Timer(_channelEchoWarningDelay, () {
+      final index = _messages.indexWhere((m) => m.id == messageId);
+      _channelEchoWarningTimers.remove(messageId);
+      if (index == -1) {
+        return;
+      }
+
+      final message = _messages[index];
+      if (!message.isChannelMessage ||
+          !message.isSentMessage ||
+          message.deliveryStatus != MessageDeliveryStatus.sent ||
+          message.echoCount > 0) {
+        return;
+      }
+
+      _channelEchoWarningMessageIds.add(messageId);
+      notifyListeners();
+    });
+  }
+
+  void _clearChannelSendWarning(String messageId) {
+    _channelEchoWarningTimers[messageId]?.cancel();
+    _channelEchoWarningTimers.remove(messageId);
+    _channelEchoWarningMessageIds.remove(messageId);
+  }
+
   /// Trigger urgent notification for SAR marker
   Future<void> _triggerSarNotification(
     Message message,
@@ -820,18 +1032,31 @@ class MessagesProvider with ChangeNotifier {
     return '${mib.toStringAsFixed(mib >= 10 ? 0 : 1)} MB';
   }
 
-  /// Persist messages to storage (async, non-blocking)
+  /// Persist messages to storage (async, non-blocking, coalescing).
+  ///
+  /// Multiple rapid calls are coalesced into a single write to avoid
+  /// overlapping serialization and redundant SharedPreferences writes.
   Future<void> _persistMessages() async {
+    _persistRequested = true;
+    if (_isPersisting) {
+      return; // A write is in flight; it will pick up our changes.
+    }
+    _isPersisting = true;
     try {
-      await _storageService.saveMessages(
-        _messages,
-        messageContactLocations: _messageContactLocations,
-        messageReceptionDetails: _messageReceptionDetails,
-        messageTransferDetails: _messageTransferDetails,
-        messageRouteMetadata: _messageRouteMetadata,
-      );
+      while (_persistRequested) {
+        _persistRequested = false;
+        await _storageService.saveMessages(
+          _messages,
+          messageContactLocations: _messageContactLocations,
+          messageReceptionDetails: _messageReceptionDetails,
+          messageTransferDetails: _messageTransferDetails,
+          messageRouteMetadata: _messageRouteMetadata,
+        );
+      }
     } catch (e) {
       debugPrint('❌ [MessagesProvider] Error persisting messages: $e');
+    } finally {
+      _isPersisting = false;
     }
   }
 
@@ -854,6 +1079,55 @@ class MessagesProvider with ChangeNotifier {
         .toList();
   }
 
+  /// Remove all messages associated with a specific channel.
+  void clearChannelMessages(int channelIdx) {
+    final messageIdsToRemove = _messages
+        .where(
+          (message) =>
+              message.isChannelMessage && message.channelIdx == channelIdx,
+        )
+        .map((message) => message.id)
+        .toList();
+
+    if (messageIdsToRemove.isEmpty) {
+      return;
+    }
+
+    _messages.removeWhere(
+      (message) => message.isChannelMessage && message.channelIdx == channelIdx,
+    );
+
+    for (final messageId in messageIdsToRemove) {
+      _timeoutTimers[messageId]?.cancel();
+      _timeoutTimers.remove(messageId);
+      _clearChannelSendWarning(messageId);
+      _messageContactMap.remove(messageId);
+      _groupedMessageMapping.remove(messageId);
+      _messageContactLocations.remove(messageId);
+      _messageReceptionDetails.remove(messageId);
+      _messageTransferDetails.remove(messageId);
+      _messageRouteMetadata.remove(messageId);
+    }
+
+    _pendingSentMessages.removeWhere(
+      (_, message) =>
+          message.isChannelMessage && message.channelIdx == channelIdx,
+    );
+    _messageAckHistory.removeWhere(
+      (messageId, _) => messageIdsToRemove.contains(messageId),
+    );
+    _ackHistoryLookup.removeWhere(
+      (_, value) => messageIdsToRemove.contains(value.$1),
+    );
+
+    debugPrint(
+      '🗑️ [MessagesProvider] Cleared ${messageIdsToRemove.length} message(s) for channel $channelIdx',
+    );
+
+    _persistMessages();
+    notifyListeners();
+  }
+
   /// Get recent messages (last N messages)
   List<Message> getRecentMessages({int count = 50}) {
     final sorted = List<Message>.from(_messages)
@@ -861,6 +1135,35 @@ class MessagesProvider with ChangeNotifier {
     return sorted.take(count).toList();
   }
 
+  List<DisplayMessageEntry> buildDisplayMessages(Iterable<Message> messages) {
+    final entries = <DisplayMessageEntry>[];
+
+    for (final message in messages) {
+      final occurrenceCount = _messageOccurrenceCount(message);
+      final existingIndex = entries.indexWhere(
+        (entry) =>
+            entry.message.text == message.text &&
+            _matchesDuplicateScope(entry.message, message),
+      );
+
+      if (existingIndex == -1) {
+        entries.add((message: message, occurrenceCount: occurrenceCount));
+        continue;
+      }
+
+      final existingEntry = entries[existingIndex];
+      entries[existingIndex] = (
+        message: existingEntry.message,
+        occurrenceCount: existingEntry.occurrenceCount + occurrenceCount,
+      );
+    }
+
+    return entries;
+  }
+
+  int _messageOccurrenceCount(Message message) =>
+      _messageReceptionDetails[message.id]?.receivedCopies ?? 1;
+
   /// Get messages from last N hours
   List<Message> getMessagesSince(Duration duration) {
     final cutoff = DateTime.now().subtract(duration);
@@ -881,17 +1184,35 @@ class MessagesProvider with ChangeNotifier {
     return _sarMarkers[id];
   }
 
+  Message? getMessageById(String id) {
+    final index = _messages.indexWhere((message) => message.id == id);
+    if (index == -1) return null;
+    return _messages[index];
+  }
+
   /// Get recent SAR markers (within last hour)
   List<SarMarker> getRecentSarMarkers() {
     return sarMarkers.where((m) => m.isRecent).toList();
   }
 
   /// Remove a SAR marker
-  void removeSarMarker(String id) {
+  Future<void> removeSarMarker(String id) async {
     _sarMarkers.remove(id);
+    _removedSarMarkerIds.add(id);
+    await _storageService.saveRemovedSarMarkerIds(_removedSarMarkerIds);
     notifyListeners();
   }
 
+  Future<void> removeSarMarkerPermanently(String id) async {
+    final hasBackingMessage = _messages.any((message) => message.id == id);
+    if (hasBackingMessage) {
+      deleteMessage(id);
+      return;
+    }
+
+    await removeSarMarker(id);
+  }
+
   /// Mark all messages as read
   void markAllAsRead() {
     bool hasChanges = false;
@@ -979,6 +1300,7 @@ class MessagesProvider with ChangeNotifier {
         final marker = message.toSarMarker();
         if (marker != null) {
           _sarMarkers.remove(marker.id);
+          _removedSarMarkerIds.add(marker.id);
         }
       }
 
@@ -988,6 +1310,7 @@ class MessagesProvider with ChangeNotifier {
       // Cancel timeout timer if it exists
       _timeoutTimers[message.id]?.cancel();
       _timeoutTimers.remove(message.id);
+      _clearChannelSendWarning(message.id);
       if (message.expectedAckTag != null) {
         _pendingSentMessages.remove(message.expectedAckTag);
       }
@@ -1001,6 +1324,7 @@ class MessagesProvider with ChangeNotifier {
       debugPrint('🗑️ [MessagesProvider] Message $messageId deleted');
 
       _persistMessages();
+      unawaited(_storageService.saveRemovedSarMarkerIds(_removedSarMarkerIds));
       notifyListeners();
     }
   }
@@ -1023,31 +1347,55 @@ class MessagesProvider with ChangeNotifier {
 
   /// Clear all messages
   void clearMessages() {
+    _cancelAllTimers();
     _messages.clear();
     _sarMarkers.clear();
+    _removedSarMarkerIds.clear();
     _messageContactLocations.clear();
     _messageReceptionDetails.clear();
     _messageTransferDetails.clear();
     _messageRouteMetadata.clear();
+    _pendingSentMessages.clear();
+    _messageContactMap.clear();
+    _groupedMessageMapping.clear();
+    _ackTagToRecipients.clear();
+    _messageAckHistory.clear();
+    _ackHistoryLookup.clear();
+    _completedAckHistory.clear();
+    _retryManager.clearAll();
     _persistMessages();
+    unawaited(_storageService.saveRemovedSarMarkerIds(_removedSarMarkerIds));
     notifyListeners();
   }
 
   /// Clear all SAR markers
-  void clearSarMarkers() {
+  Future<void> clearSarMarkers() async {
+    _removedSarMarkerIds.addAll(_sarMarkers.keys);
     _sarMarkers.clear();
+    await _storageService.saveRemovedSarMarkerIds(_removedSarMarkerIds);
     notifyListeners();
   }
 
   /// Clear all data
   void clearAll() {
+    _cancelAllTimers();
     _messages.clear();
     _sarMarkers.clear();
+    _removedSarMarkerIds.clear();
     _messageContactLocations.clear();
     _messageReceptionDetails.clear();
     _messageTransferDetails.clear();
     _messageRouteMetadata.clear();
+    _pendingSentMessages.clear();
+    _messageContactMap.clear();
+    _groupedMessageMapping.clear();
+    _ackTagToRecipients.clear();
+    _messageAckHistory.clear();
+    _ackHistoryLookup.clear();
+    _completedAckHistory.clear();
+    _retryManager.clearAll();
     _persistMessages();
+    unawaited(_storageService.saveRemovedSarMarkerIds(_removedSarMarkerIds));
     notifyListeners();
   }
 
@@ -1206,9 +1554,10 @@ class MessagesProvider with ChangeNotifier {
         );
       }
     }
+    enhancedMessage = _resolveSenderNameIfNeeded(enhancedMessage);
 
     // Check for duplicates (shouldn't happen for sent messages, but be safe)
-    if (_isDuplicate(enhancedMessage)) {
+    if (_findDuplicateMessageIndex(enhancedMessage) != -1) {
       debugPrint(
         '⚠️ [MessagesProvider] Duplicate sent message detected, skipping: ${enhancedMessage.id}',
       );
@@ -1233,7 +1582,7 @@ class MessagesProvider with ChangeNotifier {
     // If it's a SAR marker message, extract and store the marker
     if (sendingMessage.isSarMarker) {
       final marker = sendingMessage.toSarMarker();
-      if (marker != null) {
+      if (marker != null && !_removedSarMarkerIds.contains(marker.id)) {
         debugPrint('  ✅ SAR Marker created:');
         debugPrint('     marker.id: ${marker.id}');
         debugPrint('     marker.notes: "${marker.notes}"');
@@ -1452,6 +1801,9 @@ class MessagesProvider with ChangeNotifier {
         debugPrint(
           '  ℹ️ Channel message (no ACK tracking) - marked as sent immediately',
         );
+        if (message.isChannelMessage) {
+          _scheduleChannelEchoWarning(messageId);
+        }
       }
 
       debugPrint('  Calling notifyListeners() to update UI with "sent" status');
@@ -1500,6 +1852,7 @@ class MessagesProvider with ChangeNotifier {
         lastEchoAt: DateTime.now(),
       );
       _messages[index] = updatedMessage;
+      _clearChannelSendWarning(messageId);
 
       debugPrint('  Updated echo count to: $echoCount');
       _persistMessages();
@@ -1721,7 +2074,7 @@ class MessagesProvider with ChangeNotifier {
       debugPrint('  Message index in list: $index');
 
       if (index != -1) {
-        final updatedMessage = message.copyWith(
+        final updatedMessage = _messages[index].copyWith(
           deliveryStatus: MessageDeliveryStatus.delivered,
           roundTripTimeMs: roundTripTimeMs,
           deliveredAt: DateTime.now(),
@@ -1875,6 +2228,7 @@ class MessagesProvider with ChangeNotifier {
     }
 
     final message = _messages[index];
+    _clearChannelSendWarning(messageId);
     final contact = _messageContactMap[messageId];
 
     debugPrint('❌ [MessagesProvider] Message $messageId timeout/failed');
@@ -1914,6 +2268,7 @@ class MessagesProvider with ChangeNotifier {
         deliveryStatus: MessageDeliveryStatus.sending,
         lastRetryAt: DateTime.now(),
       );
+      _clearChannelSendWarning(messageId);
 
       // Cancel old timeout timer
       _timeoutTimers[message.id]?.cancel();
@@ -1979,6 +2334,7 @@ class MessagesProvider with ChangeNotifier {
         deliveryStatus: MessageDeliveryStatus.sending,
         lastRetryAt: DateTime.now(),
       );
+      _clearChannelSendWarning(messageId);
 
       _timeoutTimers[message.id]?.cancel();
       _timeoutTimers.remove(message.id);
@@ -2069,6 +2425,7 @@ class MessagesProvider with ChangeNotifier {
     _clearAckHistoryForMessage(messageId);
     _retryManager.clearRetry(messageId);
     _messageRouteMetadata.remove(messageId);
+    onManualRetryPreparedCallback?.call(messageId);
 
     _messages[index] = Message(
       id: message.id,
@@ -2076,6 +2433,7 @@ class MessagesProvider with ChangeNotifier {
       senderPublicKeyPrefix: message.senderPublicKeyPrefix,
       channelIdx: message.channelIdx,
       pathLen: message.pathLen,
+      pathBytes: message.pathBytes,
       textType: message.textType,
       senderTimestamp: message.senderTimestamp,
       text: message.text,
@@ -2104,6 +2462,7 @@ class MessagesProvider with ChangeNotifier {
       isVoice: message.isVoice,
       voiceId: message.voiceId,
     );
+    _clearChannelSendWarning(messageId);
 
     _persistMessages();
     notifyListeners();
@@ -2162,11 +2521,7 @@ class MessagesProvider with ChangeNotifier {
 
   @override
   void dispose() {
-    // Cancel all pending timeout timers
-    for (final timer in _timeoutTimers.values) {
-      timer.cancel();
-    }
-    _timeoutTimers.clear();
+    _cancelAllTimers();
     _completedAckHistory.clear();
     _messageAckHistory.clear();
     _ackHistoryLookup.clear();
@@ -2177,6 +2532,19 @@ class MessagesProvider with ChangeNotifier {
     super.dispose();
   }
 
+  /// Cancel all pending timers (timeout + echo warning).
+  void _cancelAllTimers() {
+    for (final timer in _timeoutTimers.values) {
+      timer.cancel();
+    }
+    _timeoutTimers.clear();
+    for (final timer in _channelEchoWarningTimers.values) {
+      timer.cancel();
+    }
+    _channelEchoWarningTimers.clear();
+    _channelEchoWarningMessageIds.clear();
+  }
+
   void _rememberCompletedAck(int ackCode) {
     _completedAckHistory[ackCode] = DateTime.now();
     _cleanupCompletedAckHistory();

lib/providers/sensors_provider.dart

@@ -5,6 +5,7 @@ import 'package:flutter/foundation.dart';
 import 'package:shared_preferences/shared_preferences.dart';
 
 import '../models/contact.dart';
+import '../widgets/sensors/sensor_telemetry_card.dart';
 import 'connection_provider.dart';
 import 'contacts_provider.dart';
 
@@ -15,6 +16,19 @@ class SensorsProvider with ChangeNotifier {
   static const String _watchedSensorsKey = 'watched_sensor_keys';
   static const String _visibleSensorMetricsKey = 'visible_sensor_metrics';
   static const String _fieldSpanKey = 'sensor_field_spans';
+  static const String _metricLabelKey = 'sensor_metric_labels';
+  static const String _metricOrderKey = 'sensor_metric_order';
+  static const String _autoRefreshMinutesKey = 'sensor_auto_refresh_minutes';
+  static const List<int> supportedAutoRefreshIntervals = <int>[
+    0,
+    5,
+    15,
+    30,
+    60,
+    360,
+    720,
+    1440,
+  ];
   static const Set<String> _defaultVisibleFields = <String>{
     'voltage',
     'battery',
@@ -23,6 +37,14 @@ class SensorsProvider with ChangeNotifier {
     'pressure',
     'gps',
   };
+  static const List<String> _defaultMetricOrder = <String>[
+    'voltage',
+    'battery',
+    'temperature',
+    'humidity',
+    'pressure',
+    'gps',
+  ];
 
   final List<String> _watchedSensorKeys = <String>[];
   final Map<String, SensorRefreshState> _refreshStates =
@@ -32,8 +54,15 @@ class SensorsProvider with ChangeNotifier {
       <String, Set<String>>{};
   final Map<String, Map<String, int>> _fieldSpansBySensor =
       <String, Map<String, int>>{};
+  final Map<String, Map<String, String>> _metricLabelsBySensor =
+      <String, Map<String, String>>{};
+  final Map<String, List<String>> _metricOrderBySensor =
+      <String, List<String>>{};
+  final Map<String, int> _autoRefreshMinutesBySensor = <String, int>{};
+  final Map<String, DateTime> _lastRefreshAttemptAt = <String, DateTime>{};
   bool _isLoaded = false;
   bool _isRefreshingAll = false;
+  bool _isRunningAutoRefreshTick = false;
 
   SensorsProvider() {
     unawaited(_loadWatchedSensors());
@@ -52,11 +81,17 @@ class SensorsProvider with ChangeNotifier {
       final stored = prefs.getStringList(_watchedSensorsKey) ?? <String>[];
       final storedMetricsJson = prefs.getString(_visibleSensorMetricsKey);
       final storedSpansJson = prefs.getString(_fieldSpanKey);
+      final storedLabelsJson = prefs.getString(_metricLabelKey);
+      final storedOrderJson = prefs.getString(_metricOrderKey);
+      final storedAutoRefreshJson = prefs.getString(_autoRefreshMinutesKey);
       _watchedSensorKeys
         ..clear()
         ..addAll(stored);
       _visibleFieldsBySensor.clear();
       _fieldSpansBySensor.clear();
+      _metricLabelsBySensor.clear();
+      _metricOrderBySensor.clear();
+      _autoRefreshMinutesBySensor.clear();
       if (storedMetricsJson != null && storedMetricsJson.isNotEmpty) {
         final decoded = jsonDecode(storedMetricsJson) as Map<String, dynamic>;
         for (final entry in decoded.entries) {
@@ -72,12 +107,49 @@ class SensorsProvider with ChangeNotifier {
               .map((key, value) => MapEntry(key, value as int));
         }
       }
+      if (storedLabelsJson != null && storedLabelsJson.isNotEmpty) {
+        final decoded = jsonDecode(storedLabelsJson) as Map<String, dynamic>;
+        for (final entry in decoded.entries) {
+          _metricLabelsBySensor[entry.key] =
+              (entry.value as Map<String, dynamic>).map(
+                (key, value) => MapEntry(key, value as String),
+              );
+        }
+      }
+      if (storedOrderJson != null && storedOrderJson.isNotEmpty) {
+        final decoded = jsonDecode(storedOrderJson) as Map<String, dynamic>;
+        for (final entry in decoded.entries) {
+          _metricOrderBySensor[entry.key] = (entry.value as List<dynamic>)
+              .cast<String>()
+              .toList();
+        }
+      }
+      if (storedAutoRefreshJson != null && storedAutoRefreshJson.isNotEmpty) {
+        final decoded =
+            jsonDecode(storedAutoRefreshJson) as Map<String, dynamic>;
+        for (final entry in decoded.entries) {
+          final minutes = _normalizeAutoRefreshMinutes(
+            (entry.value as num).toInt(),
+          );
+          if (minutes > 0) {
+            _autoRefreshMinutesBySensor[entry.key] = minutes;
+          }
+        }
+      }
+      _autoRefreshMinutesBySensor.removeWhere(
+        (key, _) => !_watchedSensorKeys.contains(key),
+      );
       for (final key in _watchedSensorKeys) {
         _visibleFieldsBySensor.putIfAbsent(
           key,
           () => Set<String>.from(_defaultVisibleFields),
         );
         _fieldSpansBySensor.putIfAbsent(key, () => <String, int>{});
+        _metricLabelsBySensor.putIfAbsent(key, () => <String, String>{});
+        _metricOrderBySensor.putIfAbsent(
+          key,
+          () => List<String>.from(_defaultMetricOrder),
+        );
       }
     } catch (e) {
       debugPrint('Error loading watched sensors: $e');
@@ -118,10 +190,56 @@ class SensorsProvider with ChangeNotifier {
     }
   }
 
+  Future<void> _persistMetricLabels() async {
+    try {
+      final prefs = await SharedPreferences.getInstance();
+      await prefs.setString(_metricLabelKey, jsonEncode(_metricLabelsBySensor));
+    } catch (e) {
+      debugPrint('Error saving sensor metric labels: $e');
+    }
+  }
+
+  Future<void> _persistMetricOrder() async {
+    try {
+      final prefs = await SharedPreferences.getInstance();
+      await prefs.setString(_metricOrderKey, jsonEncode(_metricOrderBySensor));
+    } catch (e) {
+      debugPrint('Error saving sensor metric order: $e');
+    }
+  }
+
+  Future<void> _persistAutoRefreshMinutes() async {
+    try {
+      final prefs = await SharedPreferences.getInstance();
+      await prefs.setString(
+        _autoRefreshMinutesKey,
+        jsonEncode(_autoRefreshMinutesBySensor),
+      );
+    } catch (e) {
+      debugPrint('Error saving sensor auto refresh minutes: $e');
+    }
+  }
+
   Set<String> visibleFieldsFor(String publicKeyHex) => Set<String>.unmodifiable(
     _visibleFieldsBySensor[publicKeyHex] ?? _defaultVisibleFields,
   );
 
+  Set<String> effectiveVisibleFieldsFor(
+    String publicKeyHex,
+    Iterable<String> availableFieldKeys,
+  ) {
+    final storedVisibleFields =
+        _visibleFieldsBySensor[publicKeyHex] ?? _defaultVisibleFields;
+    if (!_shouldAutoIncludeAvailableFields(publicKeyHex, storedVisibleFields)) {
+      return Set<String>.unmodifiable(storedVisibleFields);
+    }
+
+    return Set<String>.unmodifiable(<String>{
+      ...storedVisibleFields,
+      ...availableFieldKeys,
+    });
+  }
+
   bool showsField(String publicKeyHex, String fieldKey) =>
       visibleFieldsFor(publicKeyHex).contains(fieldKey);
 
@@ -131,6 +249,104 @@ class SensorsProvider with ChangeNotifier {
     return span == 2 ? 2 : 1;
   }
 
+  List<String> metricOrderFor(
+    String publicKeyHex,
+    Iterable<String> availableFieldKeys,
+  ) {
+    final available = availableFieldKeys.toList();
+    final availableSet = available.toSet();
+    final ordered = <String>[];
+    final seen = <String>{};
+    final stored =
+        _metricOrderBySensor[publicKeyHex] ??
+        List<String>.from(_defaultMetricOrder);
+
+    for (final fieldKey in stored) {
+      if (availableSet.contains(fieldKey) && seen.add(fieldKey)) {
+        ordered.add(fieldKey);
+      }
+    }
+    for (final fieldKey in available) {
+      if (seen.add(fieldKey)) {
+        ordered.add(fieldKey);
+      }
+    }
+    return List<String>.unmodifiable(ordered);
+  }
+
+  Map<String, String> labelOverridesFor(String publicKeyHex) =>
+      Map<String, String>.unmodifiable(
+        _metricLabelsBySensor[publicKeyHex] ?? const <String, String>{},
+      );
+
+  String? labelOverrideFor(String publicKeyHex, String fieldKey) =>
+      _metricLabelsBySensor[publicKeyHex]?[fieldKey];
+
+  int autoRefreshMinutesFor(String publicKeyHex) =>
+      _autoRefreshMinutesBySensor[publicKeyHex] ?? 0;
+
+  Future<void> setAutoRefreshMinutes(String publicKeyHex, int minutes) async {
+    final normalizedMinutes = _normalizeAutoRefreshMinutes(minutes);
+    final currentMinutes = autoRefreshMinutesFor(publicKeyHex);
+    if (currentMinutes == normalizedMinutes) {
+      return;
+    }
+
+    if (normalizedMinutes == 0) {
+      _autoRefreshMinutesBySensor.remove(publicKeyHex);
+    } else {
+      _autoRefreshMinutesBySensor[publicKeyHex] = normalizedMinutes;
+    }
+    await _persistAutoRefreshMinutes();
+    notifyListeners();
+  }
+
+  static int _normalizeAutoRefreshMinutes(int minutes) {
+    if (minutes <= 0) {
+      return 0;
+    }
+
+    if (supportedAutoRefreshIntervals.contains(minutes)) {
+      return minutes;
+    }
+
+    final positiveIntervals = supportedAutoRefreshIntervals.where(
+      (value) => value > 0,
+    );
+    var bestMatch = positiveIntervals.first;
+    var bestDistance = (minutes - bestMatch).abs();
+
+    for (final interval in positiveIntervals.skip(1)) {
+      final distance = (minutes - interval).abs();
+      if (distance < bestDistance) {
+        bestMatch = interval;
+        bestDistance = distance;
+      }
+    }
+
+    return bestMatch;
+  }
+
+  List<String> dueAutoRefreshSensorKeys({DateTime? now}) {
+    final refreshTime = now ?? DateTime.now();
+    final dueKeys = <String>[];
+
+    for (final key in _watchedSensorKeys) {
+      final minutes = autoRefreshMinutesFor(key);
+      if (minutes <= 0) {
+        continue;
+      }
+
+      final lastRefreshAt = _lastRefreshAttemptAt[key];
+      if (lastRefreshAt == null ||
+          refreshTime.difference(lastRefreshAt) >= Duration(minutes: minutes)) {
+        dueKeys.add(key);
+      }
+    }
+
+    return List<String>.unmodifiable(dueKeys);
+  }
+
   Future<void> toggleMetric(
     String publicKeyHex,
     String fieldKey,
@@ -140,8 +356,17 @@ class SensorsProvider with ChangeNotifier {
       publicKeyHex,
       () => Set<String>.from(_defaultVisibleFields),
     );
+    final metricOrder = _metricOrderBySensor.putIfAbsent(
+      publicKeyHex,
+      () => List<String>.from(_defaultMetricOrder),
+    );
+    var shouldPersistOrder = false;
     if (visible) {
       visibleFields.add(fieldKey);
+      if (!metricOrder.contains(fieldKey)) {
+        metricOrder.add(fieldKey);
+        shouldPersistOrder = true;
+      }
     } else {
       if (visibleFields.length == 1 && visibleFields.contains(fieldKey)) {
         return;
@@ -149,6 +374,9 @@ class SensorsProvider with ChangeNotifier {
       visibleFields.remove(fieldKey);
     }
     await _persistVisibleMetrics();
+    if (shouldPersistOrder) {
+      await _persistMetricOrder();
+    }
     notifyListeners();
   }
 
@@ -166,11 +394,62 @@ class SensorsProvider with ChangeNotifier {
     notifyListeners();
   }
 
+  Future<void> setMetricLabel(
+    String publicKeyHex,
+    String fieldKey,
+    String? label,
+  ) async {
+    final sensorLabels = _metricLabelsBySensor.putIfAbsent(
+      publicKeyHex,
+      () => <String, String>{},
+    );
+    final trimmed = label?.trim();
+    if (trimmed == null || trimmed.isEmpty) {
+      sensorLabels.remove(fieldKey);
+    } else {
+      sensorLabels[fieldKey] = trimmed;
+    }
+    if (sensorLabels.isEmpty) {
+      _metricLabelsBySensor.remove(publicKeyHex);
+    }
+    await _persistMetricLabels();
+    notifyListeners();
+  }
+
+  Future<void> moveMetric(
+    String publicKeyHex, {
+    required List<String> availableFieldKeys,
+    required int oldIndex,
+    required int newIndex,
+  }) async {
+    if (oldIndex < 0 ||
+        newIndex < 0 ||
+        oldIndex >= availableFieldKeys.length ||
+        newIndex >= availableFieldKeys.length ||
+        oldIndex == newIndex) {
+      return;
+    }
+
+    final reordered = List<String>.from(
+      metricOrderFor(publicKeyHex, availableFieldKeys),
+    );
+    final fieldKey = reordered.removeAt(oldIndex);
+    reordered.insert(newIndex, fieldKey);
+
+    final storedTail =
+        (_metricOrderBySensor[publicKeyHex] ?? _defaultMetricOrder).where(
+          (key) => !reordered.contains(key),
+        );
+    _metricOrderBySensor[publicKeyHex] = <String>[...reordered, ...storedTail];
+    await _persistMetricOrder();
+    notifyListeners();
+  }
+
   bool isWatched(String publicKeyHex) =>
       _watchedSensorKeys.contains(publicKeyHex);
 
   Future<void> addSensor(Contact contact) async {
-    if (!contact.isChat && !contact.isRepeater) {
+    if (!contact.isChat && !contact.isRepeater && !contact.isSensor) {
       return;
     }
     if (_watchedSensorKeys.contains(contact.publicKeyHex)) {
@@ -178,25 +457,69 @@ class SensorsProvider with ChangeNotifier {
     }
 
     _watchedSensorKeys.add(contact.publicKeyHex);
+    final initialVisibleFields = _initialVisibleFieldsForContact(contact);
     await _persistWatchedSensors();
-    _visibleFieldsBySensor[contact.publicKeyHex] = Set<String>.from(
-      _defaultVisibleFields,
-    );
+    _visibleFieldsBySensor[contact.publicKeyHex] = initialVisibleFields;
     _fieldSpansBySensor[contact.publicKeyHex] = <String, int>{'gps': 2};
+    _metricLabelsBySensor[contact.publicKeyHex] = <String, String>{};
+    _metricOrderBySensor[contact.publicKeyHex] = metricOrderFor(
+      contact.publicKeyHex,
+      initialVisibleFields,
+    );
     await _persistVisibleMetrics();
     await _persistFieldSpans();
+    await _persistMetricLabels();
+    await _persistMetricOrder();
     notifyListeners();
   }
 
+  bool _shouldAutoIncludeAvailableFields(
+    String publicKeyHex,
+    Set<String> storedVisibleFields,
+  ) {
+    if (!setEquals(storedVisibleFields, _defaultVisibleFields)) {
+      return false;
+    }
+
+    final storedOrder = _metricOrderBySensor[publicKeyHex];
+    if (storedOrder != null && !listEquals(storedOrder, _defaultMetricOrder)) {
+      return false;
+    }
+
+    final storedLabels = _metricLabelsBySensor[publicKeyHex];
+    if (storedLabels != null && storedLabels.isNotEmpty) {
+      return false;
+    }
+
+    final storedSpans = _fieldSpansBySensor[publicKeyHex];
+    if (storedSpans != null &&
+        !(storedSpans.length == 1 && storedSpans['gps'] == 2)) {
+      return false;
+    }
+
+    return true;
+  }
+
+  Set<String> _initialVisibleFieldsForContact(Contact contact) {
+    return <String>{..._defaultVisibleFields, ...sensorMetricKeysFor(contact)};
+  }
+
   Future<void> removeSensor(String publicKeyHex) async {
     _watchedSensorKeys.remove(publicKeyHex);
     _refreshStates.remove(publicKeyHex);
     _refreshStateUpdatedAt.remove(publicKeyHex);
     _visibleFieldsBySensor.remove(publicKeyHex);
     _fieldSpansBySensor.remove(publicKeyHex);
+    _metricLabelsBySensor.remove(publicKeyHex);
+    _metricOrderBySensor.remove(publicKeyHex);
+    _autoRefreshMinutesBySensor.remove(publicKeyHex);
+    _lastRefreshAttemptAt.remove(publicKeyHex);
     await _persistWatchedSensors();
     await _persistVisibleMetrics();
     await _persistFieldSpans();
+    await _persistMetricLabels();
+    await _persistMetricOrder();
+    await _persistAutoRefreshMinutes();
     notifyListeners();
   }
 
@@ -204,6 +527,7 @@ class SensorsProvider with ChangeNotifier {
     final candidates = <Contact>[
       ...contactsProvider.chatContacts,
       ...contactsProvider.repeaters,
+      ...contactsProvider.sensorContacts,
     ];
     candidates.removeWhere((contact) => isWatched(contact.publicKeyHex));
     candidates.sort((a, b) => b.lastSeenTime.compareTo(a.lastSeenTime));
@@ -239,7 +563,14 @@ class SensorsProvider with ChangeNotifier {
     required String publicKeyHex,
     required ContactsProvider contactsProvider,
     required ConnectionProvider connectionProvider,
+    DateTime? requestedAt,
   }) async {
+    if (stateFor(publicKeyHex) == SensorRefreshState.refreshing) {
+      return;
+    }
+
+    _lastRefreshAttemptAt[publicKeyHex] = requestedAt ?? DateTime.now();
+
     Contact? contact;
     for (final entry in contactsProvider.contacts) {
       if (entry.publicKeyHex == publicKeyHex) {
@@ -266,6 +597,38 @@ class SensorsProvider with ChangeNotifier {
     );
   }
 
+  Future<void> refreshDueSensors({
+    required ContactsProvider contactsProvider,
+    required ConnectionProvider connectionProvider,
+    DateTime? now,
+  }) async {
+    if (!connectionProvider.deviceInfo.isConnected ||
+        _isRefreshingAll ||
+        _isRunningAutoRefreshTick) {
+      return;
+    }
+
+    final refreshTime = now ?? DateTime.now();
+    final dueKeys = dueAutoRefreshSensorKeys(now: refreshTime);
+    if (dueKeys.isEmpty) {
+      return;
+    }
+
+    _isRunningAutoRefreshTick = true;
+    try {
+      for (final key in dueKeys) {
+        await refreshSensor(
+          publicKeyHex: key,
+          contactsProvider: contactsProvider,
+          connectionProvider: connectionProvider,
+          requestedAt: refreshTime,
+        );
+      }
+    } finally {
+      _isRunningAutoRefreshTick = false;
+    }
+  }
+
   void clearExpiredRefreshStates({DateTime? now}) {
     final cutoff = (now ?? DateTime.now()).subtract(_successStateRetention);
     final keysToClear = <String>[];

lib/providers/voice_provider.dart

@@ -1,5 +1,6 @@
 import 'dart:async';
 import 'dart:convert';
+import 'dart:typed_data';
 import 'package:flutter/foundation.dart';
 import 'package:shared_preferences/shared_preferences.dart';
 import '../models/contact.dart';
@@ -299,11 +300,15 @@ class VoiceProvider with ChangeNotifier {
     );
 
     try {
-      final pcm = await _codec.decodePackets(session.packets, session.mode);
+      final decodedPcm = await _codec.decodePackets(
+        session.packets,
+        session.mode,
+      );
+      final pcm = _preparePlaybackPcm(decodedPcm, session.mode);
       debugPrint('🎙️ [VoiceProvider] decoded ${pcm.length} PCM samples');
       _playingSessionId = sessionId;
       notifyListeners();
-      await _player.play(pcm);
+      await _player.play(pcm, sampleRateHz: session.mode.sampleRateHz);
     } catch (e, st) {
       debugPrint('❌ [VoiceProvider] Playback error: $e\n$st');
       if (_playingSessionId == sessionId) {
@@ -319,6 +324,10 @@ class VoiceProvider with ChangeNotifier {
     notifyListeners();
   }
 
+  Int16List _preparePlaybackPcm(Int16List pcm, VoicePacketMode mode) {
+    return pcm;
+  }
+
   Future<void> clearStoredVoiceData() async {
     _sessions.clear();
     _outgoingSessions.clear();

lib/screens/add_contact_screen.dart

@@ -0,0 +1,259 @@
+import 'package:flutter/material.dart';
+import 'package:flutter/services.dart';
+import 'package:provider/provider.dart';
+
+import '../providers/connection_provider.dart';
+
+class AddContactScreen extends StatefulWidget {
+  const AddContactScreen({super.key});
+
+  @override
+  State<AddContactScreen> createState() => _AddContactScreenState();
+}
+
+class _AddContactScreenState extends State<AddContactScreen> {
+  final TextEditingController _advertController = TextEditingController();
+  bool _isImporting = false;
+  bool _importSucceeded = false;
+  String? _validationError;
+
+  @override
+  void initState() {
+    super.initState();
+    _loadClipboardIfPresent();
+  }
+
+  @override
+  void dispose() {
+    _advertController.dispose();
+    super.dispose();
+  }
+
+  Future<void> _loadClipboardIfPresent() async {
+    final clipboardData = await Clipboard.getData(Clipboard.kTextPlain);
+    final text = clipboardData?.text?.trim();
+    if (!mounted || text == null || text.isEmpty) {
+      return;
+    }
+    if (_normalizeAdvertText(text) == null) {
+      return;
+    }
+    _advertController.text = text;
+  }
+
+  String? _normalizeAdvertText(String value) {
+    final trimmed = value.trim();
+    if (trimmed.isEmpty) {
+      return null;
+    }
+
+    var normalized = trimmed;
+    if (normalized.startsWith('meshcore://')) {
+      normalized = normalized.substring('meshcore://'.length);
+    }
+
+    normalized = normalized.replaceAll(RegExp(r'\s+'), '');
+    if (normalized.isEmpty) {
+      return null;
+    }
+
+    final isHex = RegExp(r'^[0-9a-fA-F]+$').hasMatch(normalized);
+    if (!isHex || normalized.length.isOdd) {
+      return null;
+    }
+
+    return normalized.toLowerCase();
+  }
+
+  Uint8List _hexToBytes(String hex) {
+    final bytes = <int>[];
+    for (var i = 0; i < hex.length; i += 2) {
+      bytes.add(int.parse(hex.substring(i, i + 2), radix: 16));
+    }
+    return Uint8List.fromList(bytes);
+  }
+
+  Future<void> _pasteFromClipboard() async {
+    final clipboardData = await Clipboard.getData(Clipboard.kTextPlain);
+    final text = clipboardData?.text;
+    if (text == null || text.trim().isEmpty) {
+      if (!mounted) return;
+      ScaffoldMessenger.of(
+        context,
+      ).showSnackBar(const SnackBar(content: Text('Clipboard is empty')));
+      return;
+    }
+
+    setState(() {
+      _advertController.text = text.trim();
+      _importSucceeded = false;
+      _validationError = null;
+    });
+  }
+
+  Future<void> _importContact() async {
+    final normalized = _normalizeAdvertText(_advertController.text);
+    if (normalized == null) {
+      setState(() {
+        _validationError =
+            'Enter a valid meshcore:// advert or raw hexadecimal contact advert.';
+      });
+      return;
+    }
+
+    final advertBytes = _hexToBytes(normalized);
+    if (advertBytes.length < 98) {
+      setState(() {
+        _validationError =
+            'Advert is too short. Expected exported contact data.';
+      });
+      return;
+    }
+
+    setState(() {
+      _isImporting = true;
+      _importSucceeded = false;
+      _validationError = null;
+    });
+
+    final connectionProvider = context.read<ConnectionProvider>();
+    await connectionProvider.importContactAdvert(advertBytes);
+    final importError = connectionProvider.error;
+
+    if (importError == null) {
+      await connectionProvider.getContacts();
+    }
+
+    if (!mounted) {
+      return;
+    }
+
+    setState(() {
+      _isImporting = false;
+    });
+
+    if (importError != null) {
+      ScaffoldMessenger.of(
+        context,
+      ).showSnackBar(SnackBar(content: Text(importError)));
+      return;
+    }
+
+    ScaffoldMessenger.of(
+      context,
+    ).showSnackBar(const SnackBar(content: Text('Contact imported')));
+    setState(() {
+      _importSucceeded = true;
+    });
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    final theme = Theme.of(context);
+    final normalized = _normalizeAdvertText(_advertController.text);
+
+    return Scaffold(
+      appBar: AppBar(title: const Text('Add Contact')),
+      body: ListView(
+        padding: const EdgeInsets.all(16),
+        children: [
+          Text(
+            'Import an exported contact advert, like meshcore-open.',
+            style: theme.textTheme.titleMedium,
+          ),
+          const SizedBox(height: 8),
+          Text(
+            'Paste a `meshcore://...` link or raw hex advert from the clipboard.',
+            style: theme.textTheme.bodyMedium?.copyWith(
+              color: theme.colorScheme.onSurfaceVariant,
+            ),
+          ),
+          const SizedBox(height: 16),
+          TextField(
+            controller: _advertController,
+            minLines: 4,
+            maxLines: 8,
+            onChanged: (_) {
+              if (_validationError != null || _importSucceeded) {
+                setState(() {
+                  _importSucceeded = false;
+                  _validationError = null;
+                });
+              }
+            },
+            decoration: InputDecoration(
+              labelText: 'Contact advert',
+              hintText: 'meshcore://...',
+              alignLabelWithHint: true,
+              border: const OutlineInputBorder(),
+              errorText: _validationError,
+            ),
+          ),
+          const SizedBox(height: 12),
+          if (normalized != null)
+            Text(
+              'Advert size: ${normalized.length ~/ 2} bytes',
+              style: theme.textTheme.bodySmall?.copyWith(
+                color: theme.colorScheme.onSurfaceVariant,
+              ),
+            ),
+          const SizedBox(height: 20),
+          Row(
+            children: [
+              Expanded(
+                child: OutlinedButton.icon(
+                  onPressed: _isImporting ? null : _pasteFromClipboard,
+                  icon: const Icon(Icons.content_paste_go_outlined),
+                  label: const Text('Paste'),
+                ),
+              ),
+              const SizedBox(width: 12),
+              Expanded(
+                child: FilledButton.icon(
+                  onPressed: (_isImporting || _importSucceeded)
+                      ? null
+                      : _importContact,
+                  icon: _isImporting
+                      ? const SizedBox(
+                          width: 16,
+                          height: 16,
+                          child: CircularProgressIndicator(strokeWidth: 2),
+                        )
+                      : _importSucceeded
+                      ? const Icon(Icons.check_circle_outline)
+                      : const Icon(Icons.person_add_alt_1_outlined),
+                  label: Text(
+                    _isImporting
+                        ? 'Importing...'
+                        : _importSucceeded
+                        ? 'Added'
+                        : 'Add Contact',
+                  ),
+                ),
+              ),
+            ],
+          ),
+          if (_importSucceeded) ...[
+            const SizedBox(height: 12),
+            Row(
+              children: [
+                Icon(
+                  Icons.check_circle,
+                  size: 18,
+                  color: theme.colorScheme.primary,
+                ),
+                const SizedBox(width: 8),
+                Text(
+                  'Contact added. Paste or edit another advert to import again.',
+                  style: theme.textTheme.bodySmall?.copyWith(
+                    color: theme.colorScheme.onSurfaceVariant,
+                  ),
+                ),
+              ],
+            ),
+          ],
+        ],
+      ),
+    );
+  }
+}

lib/screens/discovery_screen.dart

@@ -0,0 +1,701 @@
+import 'package:flutter/material.dart';
+import 'package:provider/provider.dart';
+import 'dart:typed_data';
+
+import '../l10n/app_localizations.dart';
+import '../models/contact.dart';
+import '../providers/connection_provider.dart';
+import '../providers/contacts_provider.dart';
+import '../services/mesh_map_nodes_service.dart';
+import '../widgets/compact_signal_indicator.dart' show SignalMetric;
+
+enum _DiscoveryMenuAction { repeaters, sensors }
+
+class DiscoveryScreen extends StatefulWidget {
+  const DiscoveryScreen({super.key});
+
+  @override
+  State<DiscoveryScreen> createState() => _DiscoveryScreenState();
+}
+
+class _DiscoveryScreenState extends State<DiscoveryScreen> {
+  static const int _repeaterAdvertType = 2;
+  static const int _sensorAdvertType = 4;
+  final Set<String> _resolvingAdvertKeys = <String>{};
+  final Set<int> _runningDiscoveryTypes = <int>{};
+  bool _isResolvingAll = false;
+  late final Future<List<MeshMapNode>> _cachedNodesFuture;
+
+  @override
+  void initState() {
+    super.initState();
+    _cachedNodesFuture = MeshMapNodesService.loadCachedNodes(
+      cacheTtl: MeshMapNodesService.traceCacheTtl,
+    );
+  }
+
+  Future<void> _handleMenuAction(_DiscoveryMenuAction action) async {
+    switch (action) {
+      case _DiscoveryMenuAction.repeaters:
+        await _discoverNodeType(_repeaterAdvertType);
+        break;
+      case _DiscoveryMenuAction.sensors:
+        await _discoverNodeType(_sensorAdvertType);
+        break;
+    }
+  }
+
+  Future<void> _clearAllDiscoveries() async {
+    final pendingCount = context.read<ContactsProvider>().pendingAdverts.length;
+    if (pendingCount == 0) {
+      return;
+    }
+
+    final confirmed = await showDialog<bool>(
+      context: context,
+      builder: (dialogContext) => AlertDialog(
+        title: const Text('Clear discoveries'),
+        content: Text(
+          'Remove all $pendingCount pending discover${pendingCount == 1 ? 'y' : 'ies'} from this device?',
+        ),
+        actions: [
+          TextButton(
+            onPressed: () => Navigator.of(dialogContext).pop(false),
+            child: const Text('Cancel'),
+          ),
+          FilledButton(
+            onPressed: () => Navigator.of(dialogContext).pop(true),
+            child: const Text('Clear all'),
+          ),
+        ],
+      ),
+    );
+
+    if (confirmed != true || !mounted) {
+      return;
+    }
+
+    await context.read<ContactsProvider>().clearPendingAdverts();
+    if (!mounted) {
+      return;
+    }
+    ScaffoldMessenger.of(context).showSnackBar(
+      const SnackBar(content: Text('Cleared pending discoveries.')),
+    );
+  }
+
+  Future<void> _discoverNodeType(int advertType) async {
+    if (_runningDiscoveryTypes.contains(advertType)) return;
+
+    setState(() {
+      _runningDiscoveryTypes.add(advertType);
+    });
+
+    try {
+      await context.read<ConnectionProvider>().discoverNodeType(
+        advertType: advertType,
+      );
+      if (!mounted) return;
+      final label = switch (advertType) {
+        _repeaterAdvertType => 'Repeater discovery sent',
+        _sensorAdvertType => 'Sensor discovery sent',
+        _ => 'Discovery sent',
+      };
+      ScaffoldMessenger.of(
+        context,
+      ).showSnackBar(SnackBar(content: Text(label)));
+    } finally {
+      if (mounted) {
+        setState(() {
+          _runningDiscoveryTypes.remove(advertType);
+        });
+      }
+    }
+  }
+
+  Future<void> _resolveAdvert(PendingAdvert advert) async {
+    final keyHex = advert.publicKeyHex;
+    if (_resolvingAdvertKeys.contains(keyHex)) return;
+
+    setState(() {
+      _resolvingAdvertKeys.add(keyHex);
+    });
+
+    try {
+      final connectionProvider = context.read<ConnectionProvider>();
+      final contactsProvider = context.read<ContactsProvider>();
+
+      final canAddDirectly = _canAddPendingAdvertDirectly(advert);
+      if (canAddDirectly) {
+        final added = await _addPendingAdvertToRadio(
+          advert,
+          connectionProvider: connectionProvider,
+          contactsProvider: contactsProvider,
+        );
+        if (!added) {
+          return;
+        }
+      } else {
+        await connectionProvider.getContact(advert.publicKey);
+        if (connectionProvider.error == 'Not found') {
+          connectionProvider.clearError();
+          final added = await _addPendingAdvertToRadio(
+            advert,
+            connectionProvider: connectionProvider,
+            contactsProvider: contactsProvider,
+          );
+          if (!added) {
+            return;
+          }
+        }
+      }
+      if ((advert.typeValue ?? 0) == _sensorAdvertType) {
+        await connectionProvider.requestTelemetry(advert.publicKey);
+      }
+    } finally {
+      if (mounted) {
+        setState(() {
+          _resolvingAdvertKeys.remove(keyHex);
+        });
+      }
+    }
+  }
+
+  Future<void> _resolveAll(List<PendingAdvert> adverts) async {
+    if (_isResolvingAll || adverts.isEmpty) return;
+
+    setState(() {
+      _isResolvingAll = true;
+    });
+
+    try {
+      for (final advert in adverts) {
+        if (!mounted) break;
+        await _resolveAdvert(advert);
+      }
+    } finally {
+      if (mounted) {
+        setState(() {
+          _isResolvingAll = false;
+        });
+      }
+    }
+  }
+
+  String _formatRelativeTime(BuildContext context, DateTime when) {
+    final l10n = AppLocalizations.of(context)!;
+    final diff = DateTime.now().difference(when);
+    if (diff.inMinutes < 1) return l10n.justNow;
+    if (diff.inMinutes < 60) return l10n.minutesAgo(diff.inMinutes);
+    if (diff.inHours < 24) return l10n.hoursAgo(diff.inHours);
+    return l10n.daysAgo(diff.inDays);
+  }
+
+  Contact _contactFromPendingAdvert(PendingAdvert advert) {
+    final lastAdvert =
+        advert.lastAdvert ?? (advert.receivedAt.millisecondsSinceEpoch ~/ 1000);
+    final advName = advert.advName?.trim().isNotEmpty == true
+        ? advert.advName!.trim()
+        : advert.shortDisplayKey;
+
+    return Contact(
+      publicKey: Uint8List.fromList(advert.publicKey),
+      type: ContactType.fromValue(advert.typeValue ?? 0),
+      flags: advert.flags ?? 0,
+      outPathLen: advert.signedEncodedPathLen ?? -1,
+      outPath: advert.paddedPathBytes == null
+          ? Uint8List(64)
+          : Uint8List.fromList(advert.paddedPathBytes!),
+      advName: advName,
+      lastAdvert: lastAdvert,
+      advLat: advert.advLat ?? 0,
+      advLon: advert.advLon ?? 0,
+      lastMod: lastAdvert,
+    );
+  }
+
+  bool _canAddPendingAdvertDirectly(PendingAdvert advert) {
+    return advert.publicKey.length == 32 &&
+        advert.typeValue != null &&
+        advert.typeValue != 0;
+  }
+
+  Future<bool> _addPendingAdvertToRadio(
+    PendingAdvert advert, {
+    required ConnectionProvider connectionProvider,
+    required ContactsProvider contactsProvider,
+  }) async {
+    final contact = _contactFromPendingAdvert(advert);
+    await connectionProvider.addOrUpdateContact(contact);
+
+    final addError = connectionProvider.error;
+    if (addError != null) {
+      if (mounted) {
+        ScaffoldMessenger.of(context).showSnackBar(
+          SnackBar(content: Text('Failed to add contact: $addError')),
+        );
+      }
+      return false;
+    }
+
+    contactsProvider.addOrUpdateContact(
+      contact,
+      devicePublicKey: connectionProvider.deviceInfo.publicKey,
+    );
+    return true;
+  }
+
+  String _displayNameForAdvert(
+    PendingAdvert advert,
+    ContactsProvider contactsProvider,
+    List<MeshMapNode> cachedNodes,
+  ) {
+    final advertisedName = advert.advName?.trim();
+    if (advertisedName != null && advertisedName.isNotEmpty) {
+      return advertisedName;
+    }
+
+    Contact? existingMatch;
+    for (final contact in contactsProvider.contacts) {
+      if (contact.publicKeyHex == advert.publicKeyHex) {
+        existingMatch = contact;
+        break;
+      }
+    }
+    if (existingMatch != null && existingMatch.displayName.trim().isNotEmpty) {
+      return existingMatch.displayName;
+    }
+
+    MeshMapNode? cachedMatch;
+    for (final node in cachedNodes) {
+      if (node.publicKey == advert.publicKeyHex.toLowerCase()) {
+        cachedMatch = node;
+        break;
+      }
+    }
+    if (cachedMatch != null && cachedMatch.name.trim().isNotEmpty) {
+      return cachedMatch.name;
+    }
+
+    return advert.shortDisplayKey;
+  }
+
+  IconData _iconForAdvert(PendingAdvert advert) {
+    return switch (advert.typeValue) {
+      _repeaterAdvertType => Icons.router_outlined,
+      _sensorAdvertType => Icons.sensors_outlined,
+      _ => Icons.campaign_outlined,
+    };
+  }
+
+  String? _typeLabelForAdvert(PendingAdvert advert) {
+    return switch (advert.typeValue) {
+      _repeaterAdvertType => 'Repeater',
+      _sensorAdvertType => 'Sensor',
+      3 => 'Room',
+      1 => 'Chat',
+      _ => null,
+    };
+  }
+
+  String? _resolvedTypeLabelForAdvert(
+    PendingAdvert advert,
+    List<MeshMapNode> cachedNodes,
+  ) {
+    final directType = _typeLabelForAdvert(advert);
+    if (directType != null) {
+      return directType;
+    }
+
+    for (final node in cachedNodes) {
+      if (node.publicKey == advert.publicKeyHex.toLowerCase()) {
+        return switch (node.type) {
+          1 => 'Repeater',
+          4 => 'Sensor',
+          3 => 'Room',
+          2 => 'Chat',
+          _ => null,
+        };
+      }
+    }
+
+    return null;
+  }
+
+  Widget _buildAdvertTitle(
+    BuildContext context, {
+    required String displayName,
+    String? subtitle,
+  }) {
+    return Column(
+      crossAxisAlignment: CrossAxisAlignment.start,
+      mainAxisSize: MainAxisSize.min,
+      children: [
+        Text(
+          displayName,
+          maxLines: 1,
+          overflow: TextOverflow.ellipsis,
+          style: const TextStyle(fontWeight: FontWeight.bold),
+        ),
+        if (subtitle != null && subtitle.isNotEmpty) ...[
+          const SizedBox(height: 2),
+          Text(
+            subtitle,
+            maxLines: 1,
+            overflow: TextOverflow.ellipsis,
+            style: Theme.of(context).textTheme.bodySmall?.copyWith(
+              color: Theme.of(context).colorScheme.onSurfaceVariant,
+            ),
+          ),
+        ],
+      ],
+    );
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    final l10n = AppLocalizations.of(context)!;
+
+    return Scaffold(
+      appBar: AppBar(
+        title: const Text('Discovery'),
+        actions: [
+          Consumer<ConnectionProvider>(
+            builder: (context, connectionProvider, child) {
+              final isConnected = connectionProvider.deviceInfo.isConnected;
+              final repeatersBusy = _runningDiscoveryTypes.contains(
+                _repeaterAdvertType,
+              );
+              final sensorsBusy = _runningDiscoveryTypes.contains(
+                _sensorAdvertType,
+              );
+
+              return PopupMenuButton<_DiscoveryMenuAction>(
+                tooltip: 'Discovery tools',
+                onSelected: _handleMenuAction,
+                itemBuilder: (context) => [
+                  PopupMenuItem<_DiscoveryMenuAction>(
+                    value: _DiscoveryMenuAction.repeaters,
+                    enabled: isConnected && !repeatersBusy,
+                    child: Row(
+                      children: [
+                        repeatersBusy
+                            ? const SizedBox(
+                                width: 18,
+                                height: 18,
+                                child: CircularProgressIndicator(
+                                  strokeWidth: 2,
+                                ),
+                              )
+                            : const Icon(Icons.router_outlined),
+                        const SizedBox(width: 12),
+                        const Text('Discover repeaters'),
+                      ],
+                    ),
+                  ),
+                  PopupMenuItem<_DiscoveryMenuAction>(
+                    value: _DiscoveryMenuAction.sensors,
+                    enabled: isConnected && !sensorsBusy,
+                    child: Row(
+                      children: [
+                        sensorsBusy
+                            ? const SizedBox(
+                                width: 18,
+                                height: 18,
+                                child: CircularProgressIndicator(
+                                  strokeWidth: 2,
+                                ),
+                              )
+                            : const Icon(Icons.sensors_outlined),
+                        const SizedBox(width: 12),
+                        const Text('Discover sensors'),
+                      ],
+                    ),
+                  ),
+                ],
+              );
+            },
+          ),
+        ],
+      ),
+      body: FutureBuilder<List<MeshMapNode>>(
+        future: _cachedNodesFuture,
+        builder: (context, nodesSnapshot) => Consumer2<ContactsProvider, ConnectionProvider>(
+          builder: (context, contactsProvider, connectionProvider, child) {
+            final pendingAdverts = contactsProvider.pendingAdverts;
+            final isConnected = connectionProvider.deviceInfo.isConnected;
+            final cachedNodes = nodesSnapshot.data ?? const <MeshMapNode>[];
+
+            return ListView(
+              padding: const EdgeInsets.all(16),
+              children: [
+                Card(
+                  child: Padding(
+                    padding: const EdgeInsets.all(16),
+                    child: Column(
+                      crossAxisAlignment: CrossAxisAlignment.start,
+                      children: [
+                        Row(
+                          crossAxisAlignment: CrossAxisAlignment.center,
+                          children: [
+                            const Icon(Icons.person_search),
+                            const SizedBox(width: 12),
+                            Expanded(
+                              child: Text(
+                                'Pending discoveries (${pendingAdverts.length})',
+                                style: Theme.of(context).textTheme.titleMedium,
+                              ),
+                            ),
+                          ],
+                        ),
+                        const SizedBox(height: 12),
+                        Text(
+                          'Resolve entries manually so they do not auto-populate contacts.',
+                          style: Theme.of(context).textTheme.bodyMedium,
+                        ),
+                        const SizedBox(height: 14),
+                        Row(
+                          children: [
+                            Expanded(
+                              child: OutlinedButton.icon(
+                                onPressed:
+                                    isConnected &&
+                                        pendingAdverts.isNotEmpty &&
+                                        !_isResolvingAll
+                                    ? () => _resolveAll(pendingAdverts)
+                                    : null,
+                                icon: _isResolvingAll
+                                    ? const SizedBox(
+                                        width: 16,
+                                        height: 16,
+                                        child: CircularProgressIndicator(
+                                          strokeWidth: 2,
+                                        ),
+                                      )
+                                    : const Icon(
+                                        Icons.download_for_offline_outlined,
+                                      ),
+                                label: const Text('Resolve all'),
+                              ),
+                            ),
+                            const SizedBox(width: 10),
+                            Expanded(
+                              child: OutlinedButton.icon(
+                                onPressed: pendingAdverts.isNotEmpty
+                                    ? _clearAllDiscoveries
+                                    : null,
+                                icon: const Icon(Icons.clear_all_rounded),
+                                label: const Text('Clear all'),
+                              ),
+                            ),
+                          ],
+                        ),
+                      ],
+                    ),
+                  ),
+                ),
+                const SizedBox(height: 16),
+                if (pendingAdverts.isEmpty)
+                  Padding(
+                    padding: const EdgeInsets.symmetric(vertical: 48),
+                    child: Column(
+                      children: [
+                        Icon(
+                          Icons.person_search_outlined,
+                          size: 64,
+                          color: Theme.of(context).disabledColor,
+                        ),
+                        const SizedBox(height: 16),
+                        Text(
+                          'No pending discoveries',
+                          style: Theme.of(context).textTheme.titleLarge,
+                        ),
+                        const SizedBox(height: 8),
+                        Text(
+                          'Unknown adverts will appear here until you choose to resolve them.',
+                          textAlign: TextAlign.center,
+                          style: Theme.of(context).textTheme.bodyMedium,
+                        ),
+                      ],
+                    ),
+                  ),
+                ...pendingAdverts.map((advert) {
+                  final isResolving = _resolvingAdvertKeys.contains(
+                    advert.publicKeyHex,
+                  );
+                  final displayName = _displayNameForAdvert(
+                    advert,
+                    contactsProvider,
+                    cachedNodes,
+                  );
+                  final typeLabel = _resolvedTypeLabelForAdvert(
+                    advert,
+                    cachedNodes,
+                  );
+                  final downMetric = SignalMetric.fromValues(
+                    rssiDbm: advert.rxRssiDbm,
+                    snrDb: advert.rxSnr,
+                  );
+                  final upMetric = SignalMetric.fromValues(
+                    rssiDbm: advert.repeaterLastRssi,
+                    snrDb: advert.repeaterLastSnr,
+                  );
+                  final detailLines = <String>[
+                    '${l10n.publicKey}: ${advert.shortDisplayKey}',
+                  ];
+                  final summaryParts = <String>[];
+                  final battery = advert.repeaterBatteryPercent;
+                  if (battery != null) {
+                    summaryParts.add('Battery ${battery.round()}%');
+                  }
+                  if (advert.repeaterQueueLen != null) {
+                    summaryParts.add('Queue ${advert.repeaterQueueLen}');
+                  }
+                  if (summaryParts.isNotEmpty) {
+                    detailLines.add(summaryParts.join(' • '));
+                  }
+                  detailLines.add(
+                    '${l10n.lastSeen}: ${_formatRelativeTime(context, advert.receivedAt)}',
+                  );
+                  return Card(
+                    margin: const EdgeInsets.only(bottom: 8),
+                    child: Padding(
+                      padding: const EdgeInsets.all(14),
+                      child: Column(
+                        crossAxisAlignment: CrossAxisAlignment.start,
+                        children: [
+                          Row(
+                            crossAxisAlignment: CrossAxisAlignment.center,
+                            children: [
+                              CircleAvatar(child: Icon(_iconForAdvert(advert))),
+                              const SizedBox(width: 12),
+                              Expanded(
+                                child: _buildAdvertTitle(
+                                  context,
+                                  displayName: displayName,
+                                  subtitle: typeLabel,
+                                ),
+                              ),
+                              if (downMetric != null || upMetric != null) ...[
+                                const SizedBox(width: 12),
+                                _buildSignalSummary(
+                                  context,
+                                  downMetric: downMetric,
+                                  upMetric: upMetric,
+                                ),
+                              ],
+                              const SizedBox(width: 8),
+                              isResolving
+                                  ? const SizedBox(
+                                      width: 18,
+                                      height: 18,
+                                      child: CircularProgressIndicator(
+                                        strokeWidth: 2,
+                                      ),
+                                    )
+                                  : IconButton(
+                                      visualDensity: VisualDensity.compact,
+                                      icon: const Icon(Icons.person_add_alt_1),
+                                      tooltip: 'Resolve contact',
+                                      onPressed: isConnected
+                                          ? () => _resolveAdvert(advert)
+                                          : null,
+                                    ),
+                            ],
+                          ),
+                          const SizedBox(height: 10),
+                          Text(
+                            detailLines.join('\n'),
+                            style: Theme.of(context).textTheme.bodyMedium,
+                          ),
+                        ],
+                      ),
+                    ),
+                  );
+                }),
+              ],
+            );
+          },
+        ),
+      ),
+    );
+  }
+
+  Widget _buildSignalSummary(
+    BuildContext context, {
+    SignalMetric? downMetric,
+    SignalMetric? upMetric,
+  }) {
+    if (downMetric == null && upMetric == null) {
+      return const SizedBox.shrink();
+    }
+
+    return Column(
+      mainAxisSize: MainAxisSize.min,
+      crossAxisAlignment: CrossAxisAlignment.end,
+      children: [
+        if (downMetric != null)
+          _buildDirectionalSignal(
+            context,
+            icon: Icons.south_west_rounded,
+            metric: downMetric,
+          ),
+        if (downMetric != null && upMetric != null) const SizedBox(height: 6),
+        if (upMetric != null)
+          _buildDirectionalSignal(
+            context,
+            icon: Icons.north_east_rounded,
+            metric: upMetric,
+          ),
+      ],
+    );
+  }
+
+  Widget _buildDirectionalSignal(
+    BuildContext context, {
+    required IconData icon,
+    required SignalMetric metric,
+  }) {
+    return Row(
+      mainAxisSize: MainAxisSize.min,
+      crossAxisAlignment: CrossAxisAlignment.center,
+      children: [
+        Icon(
+          icon,
+          size: 11,
+          color: Theme.of(context).colorScheme.onSurfaceVariant,
+        ),
+        const SizedBox(width: 3),
+        _buildMiniSignalBars(context, metric),
+        const SizedBox(width: 4),
+        Text(
+          metric.valueLabel,
+          style: Theme.of(
+            context,
+          ).textTheme.labelSmall?.copyWith(fontWeight: FontWeight.w700),
+        ),
+      ],
+    );
+  }
+
+  Widget _buildMiniSignalBars(BuildContext context, SignalMetric metric) {
+    final inactive = Theme.of(context).colorScheme.outlineVariant;
+    return Row(
+      mainAxisSize: MainAxisSize.min,
+      crossAxisAlignment: CrossAxisAlignment.end,
+      children: [
+        for (var index = 0; index < 3; index++) ...[
+          if (index > 0) const SizedBox(width: 2),
+          Container(
+            width: 3,
+            height: 6.0 + (index * 4),
+            decoration: BoxDecoration(
+              color: index < metric.activeBars ? metric.color : inactive,
+              borderRadius: BorderRadius.circular(2),
+            ),
+          ),
+        ],
+      ],
+    );
+  }
+}

lib/screens/home_screen.dart

@@ -12,12 +12,14 @@ import '../providers/contacts_provider.dart';
 import '../theme/app_theme.dart';
 import 'messages_tab.dart';
 import 'contacts_tab.dart';
+import 'discovery_screen.dart';
 import 'sensors_tab.dart';
 import 'map_tab.dart';
 import 'repeaters_map_screen.dart';
 import 'settings_screen.dart';
 import 'device_config_screen.dart';
 import 'packet_log_screen.dart';
+import 'live_traffic_screen.dart';
 import 'spectrum_scan_screen.dart';
 import '../utils/toast_logger.dart';
 import '../l10n/app_localizations.dart';
@@ -218,6 +220,10 @@ class _HomeScreenState extends State<HomeScreen>
     );
   }
 
+  void _openLiveTraffic(ConnectionProvider provider) {
+    openLiveTrafficScreen(context, provider);
+  }
+
   @override
   void didChangeAppLifecycleState(AppLifecycleState state) {
     _lifecycleState = state;
@@ -647,6 +653,41 @@ class _HomeScreenState extends State<HomeScreen>
                       );
                     }
 
+                    items.add(
+                      PopupMenuItem(
+                        child: const Row(
+                          children: [
+                            Icon(Icons.radar_outlined),
+                            SizedBox(width: 8),
+                            Text('Live Traffic'),
+                          ],
+                        ),
+                        onTap: () {
+                          final navigator = Navigator.of(context);
+                          final provider = context.read<ConnectionProvider>();
+                          Future.delayed(Duration.zero, () {
+                            if (!mounted) return;
+                            navigator.push(
+                              MaterialPageRoute(
+                                builder: (_) => LiveTrafficScreen.fromProvider(
+                                  provider,
+                                  openPacketLogs: () {
+                                    navigator.push(
+                                      MaterialPageRoute(
+                                        builder: (_) => PacketLogScreen(
+                                          bleService: provider.bleService,
+                                        ),
+                                      ),
+                                    );
+                                  },
+                                ),
+                              ),
+                            );
+                          });
+                        },
+                      ),
+                    );
+
                     items.add(
                       PopupMenuItem(
                         child: const Row(
@@ -672,6 +713,39 @@ class _HomeScreenState extends State<HomeScreen>
                       ),
                     );
 
+                    items.add(
+                      PopupMenuItem(
+                        child: Row(
+                          children: [
+                            const Icon(Icons.person_search),
+                            const SizedBox(width: 8),
+                            Consumer<ContactsProvider>(
+                              builder: (context, contactsProvider, child) {
+                                final pendingCount =
+                                    contactsProvider.pendingAdverts.length;
+                                return Text(
+                                  pendingCount > 0
+                                      ? 'Discovery ($pendingCount)'
+                                      : 'Discovery',
+                                );
+                              },
+                            ),
+                          ],
+                        ),
+                        onTap: () {
+                          final navigator = Navigator.of(context);
+                          Future.delayed(Duration.zero, () {
+                            if (!mounted) return;
+                            navigator.push(
+                              MaterialPageRoute(
+                                builder: (context) => const DiscoveryScreen(),
+                              ),
+                            );
+                          });
+                        },
+                      ),
+                    );
+
                     items.add(
                       PopupMenuItem(
                         child: Row(
@@ -713,6 +787,9 @@ class _HomeScreenState extends State<HomeScreen>
           switch (tab) {
             case _HomeTab.messages:
               return MessagesTab(
+                isActive:
+                    _currentTab == _HomeTab.messages &&
+                    _lifecycleState == AppLifecycleState.resumed,
                 onNavigateToMap: _isMapEnabled
                     ? () => _navigateToTab(_HomeTab.map)
                     : null,
@@ -725,7 +802,11 @@ class _HomeScreenState extends State<HomeScreen>
                 onNavigateToMessages: () => _navigateToTab(_HomeTab.messages),
               );
             case _HomeTab.sensors:
-              return const SensorsTab();
+              return SensorsTab(
+                isActive:
+                    _currentTab == _HomeTab.sensors &&
+                    _lifecycleState == AppLifecycleState.resumed,
+              );
             case _HomeTab.map:
               return MapTab(
                 onFullscreenChanged: (isFullscreen) {
@@ -1056,6 +1137,7 @@ class _HomeScreenState extends State<HomeScreen>
                 SizedBox(width: isTight ? 8 : 12),
                 if (_showRxTxIndicators)
                   GestureDetector(
+                    onTap: () => _openLiveTraffic(provider),
                     onLongPress: () {
                       Navigator.push(
                         context,

lib/screens/map_tab.dart

@@ -22,6 +22,7 @@ import '../models/message.dart';
 import '../services/background_location_service.dart';
 import '../services/location_tracking_service.dart';
 import '../services/map_marker_service.dart';
+import '../services/message_destination_preferences.dart';
 import '../services/trail_color_service.dart';
 import '../widgets/map_debug_info.dart';
 import '../widgets/map/compass_widget.dart';
@@ -816,6 +817,174 @@ class _MapTabState extends State<MapTab> with AutomaticKeepAliveClientMixin {
     }
   }
 
+  Future<void> _showSarMarkerActions(
+    SarMarker marker,
+    MessagesProvider messagesProvider,
+    ContactsProvider contactsProvider,
+  ) async {
+    final message = messagesProvider.getMessageById(marker.id);
+
+    await showModalBottomSheet<void>(
+      context: context,
+      showDragHandle: true,
+      builder: (sheetContext) {
+        final theme = Theme.of(sheetContext);
+        return SafeArea(
+          child: Padding(
+            padding: const EdgeInsets.fromLTRB(20, 8, 20, 20),
+            child: Column(
+              mainAxisSize: MainAxisSize.min,
+              crossAxisAlignment: CrossAxisAlignment.start,
+              children: [
+                Row(
+                  children: [
+                    Text(marker.emoji, style: const TextStyle(fontSize: 24)),
+                    const SizedBox(width: 10),
+                    Expanded(
+                      child: Text(
+                        marker.displayName,
+                        style: theme.textTheme.titleMedium,
+                      ),
+                    ),
+                  ],
+                ),
+                const SizedBox(height: 12),
+                Text(
+                  '${marker.location.latitude.toStringAsFixed(6)}, ${marker.location.longitude.toStringAsFixed(6)}',
+                  style: theme.textTheme.bodyMedium,
+                ),
+                const SizedBox(height: 4),
+                Text(
+                  marker.senderName != null
+                      ? '${marker.timeAgo} • ${marker.senderName}'
+                      : marker.timeAgo,
+                  style: theme.textTheme.bodySmall,
+                ),
+                if (marker.notes != null && marker.notes!.isNotEmpty) ...[
+                  const SizedBox(height: 12),
+                  Text(marker.notes!),
+                ],
+                const SizedBox(height: 16),
+                if (message != null)
+                  ListTile(
+                    contentPadding: EdgeInsets.zero,
+                    leading: const Icon(Icons.chat_bubble_outline),
+                    title: const Text('Open message'),
+                    subtitle: const Text('Jump to the related SAR message'),
+                    onTap: () async {
+                      Navigator.pop(sheetContext);
+                      await _openSarMarkerMessage(
+                        message,
+                        messagesProvider,
+                        contactsProvider,
+                      );
+                    },
+                  ),
+                ListTile(
+                  contentPadding: EdgeInsets.zero,
+                  leading: const Icon(Icons.delete_outline, color: Colors.red),
+                  title: Text(
+                    'Remove marker',
+                    style: TextStyle(color: theme.colorScheme.error),
+                  ),
+                  subtitle: Text(
+                    message != null
+                        ? 'This also removes the linked SAR message.'
+                        : 'Hide this marker from the map.',
+                  ),
+                  onTap: () async {
+                    final confirmed = await _confirmSarMarkerRemoval(
+                      hasMessage: message != null,
+                    );
+                    if (!mounted ||
+                        !sheetContext.mounted ||
+                        confirmed != true) {
+                      return;
+                    }
+                    Navigator.pop(sheetContext);
+                    await messagesProvider.removeSarMarkerPermanently(
+                      marker.id,
+                    );
+                  },
+                ),
+              ],
+            ),
+          ),
+        );
+      },
+    );
+  }
+
+  Future<bool?> _confirmSarMarkerRemoval({required bool hasMessage}) {
+    return showDialog<bool>(
+      context: context,
+      builder: (dialogContext) => AlertDialog(
+        title: const Text('Remove SAR marker'),
+        content: Text(
+          hasMessage
+              ? 'This will remove the marker and its linked chat message.'
+              : 'This will hide the marker from the map, even if it is not visible in chat.',
+        ),
+        actions: [
+          TextButton(
+            onPressed: () => Navigator.pop(dialogContext, false),
+            child: Text(AppLocalizations.of(dialogContext)!.cancel),
+          ),
+          TextButton(
+            onPressed: () => Navigator.pop(dialogContext, true),
+            style: TextButton.styleFrom(foregroundColor: Colors.red),
+            child: Text(AppLocalizations.of(dialogContext)!.delete),
+          ),
+        ],
+      ),
+    );
+  }
+
+  Future<void> _openSarMarkerMessage(
+    Message message,
+    MessagesProvider messagesProvider,
+    ContactsProvider contactsProvider,
+  ) async {
+    if (message.isChannelMessage) {
+      final channelContact = contactsProvider.channels.where((contact) {
+        return contact.publicKey.length > 1 &&
+            contact.publicKey[1] == (message.channelIdx ?? 0);
+      }).firstOrNull;
+
+      messagesProvider.navigateToDestination(
+        MessageDestinationPreferences.destinationTypeChannel,
+        recipientPublicKeyHex: channelContact?.publicKeyHex,
+      );
+    } else {
+      Contact? destinationContact;
+
+      if (message.recipientPublicKey != null) {
+        destinationContact = contactsProvider.contacts.where((contact) {
+          return contact.publicKey.length >=
+                  message.recipientPublicKey!.length &&
+              contact.publicKey.matches(message.recipientPublicKey!);
+        }).firstOrNull;
+      } else if (message.senderPublicKeyPrefix != null &&
+          message.senderPublicKeyPrefix!.length >= 6) {
+        destinationContact = contactsProvider.findContactByPrefix(
+          message.senderPublicKeyPrefix!,
+        );
+      }
+
+      if (destinationContact != null) {
+        messagesProvider.navigateToDestination(
+          destinationContact.isRoom
+              ? MessageDestinationPreferences.destinationTypeRoom
+              : MessageDestinationPreferences.destinationTypeContact,
+          recipientPublicKeyHex: destinationContact.publicKeyHex,
+        );
+      }
+    }
+
+    messagesProvider.navigateToMessage(message.id);
+    widget.onNavigateToMessages?.call();
+  }
+
   /// Show SAR dialog with pre-populated location from map long press
   void _showSarDialogWithLocation(LatLng location) {
     // Create a Position object from the LatLng coordinates
@@ -1119,9 +1288,26 @@ class _MapTabState extends State<MapTab> with AutomaticKeepAliveClientMixin {
   Widget build(BuildContext context) {
     super.build(context); // Required for AutomaticKeepAliveClientMixin
 
-    return Consumer3<ContactsProvider, MessagesProvider, DrawingProvider>(
-      builder: (context, contactsProvider, messagesProvider, drawingProvider, child) {
-        final contactsWithLocation = contactsProvider.contactsWithLocation;
+    return Consumer4<
+      ContactsProvider,
+      MessagesProvider,
+      DrawingProvider,
+      MapProvider
+    >(
+      builder: (
+        context,
+        contactsProvider,
+        messagesProvider,
+        drawingProvider,
+        mapProvider,
+        child,
+      ) {
+        final allContactsWithLocation = contactsProvider.contactsWithLocation;
+        final contactsWithLocation = mapProvider.hideRepeatersOnMap
+            ? allContactsWithLocation
+                .where((contact) => !contact.isRepeater)
+                .toList()
+            : allContactsWithLocation;
         // Filter SAR markers based on visibility toggle
         final allSarMarkers = messagesProvider.sarMarkers;
         final sarMarkers = drawingProvider.showSarMarkers
@@ -1719,7 +1905,7 @@ class _MapTabState extends State<MapTab> with AutomaticKeepAliveClientMixin {
                         onTap: (contact) {
                           _showDetailedCompassWithContact(
                             context,
-                            contactsProvider.contactsWithLocation,
+                            contactsWithLocation,
                             messagesProvider.sarMarkers,
                             contact,
                           );
@@ -1731,9 +1917,11 @@ class _MapTabState extends State<MapTab> with AutomaticKeepAliveClientMixin {
                         context: context,
                         mapRotation: _getMapRotation(),
                         onTap: (marker) {
-                          // Navigate to the corresponding message in Messages tab
-                          messagesProvider.navigateToMessage(marker.id);
-                          widget.onNavigateToMessages?.call();
+                          _showSarMarkerActions(
+                            marker,
+                            messagesProvider,
+                            contactsProvider,
+                          );
                         },
                       ),
                       // User location marker with directional pointer
@@ -2021,7 +2209,7 @@ class _MapTabState extends State<MapTab> with AutomaticKeepAliveClientMixin {
                 child: GestureDetector(
                   onTap: () => _showDetailedCompass(
                     context,
-                    contactsProvider.contactsWithLocation,
+                    contactsWithLocation,
                     messagesProvider.sarMarkers,
                   ),
                   child: CompassWidget(

lib/screens/messages_tab.dart

@@ -39,8 +39,9 @@ import '../l10n/app_localizations.dart';
 
 class MessagesTab extends StatefulWidget {
   final VoidCallback? onNavigateToMap;
+  final bool isActive;
 
-  const MessagesTab({super.key, this.onNavigateToMap});
+  const MessagesTab({super.key, this.onNavigateToMap, this.isActive = true});
 
   @override
   State<MessagesTab> createState() => _MessagesTabState();
@@ -50,6 +51,7 @@ class _MessagesTabState extends State<MessagesTab> {
   static const int _maxContactMessageBytes = 156;
   static const int _maxChannelMessageBytes = 127;
   static const double _composerOverlayHeight = 148;
+  static const Duration _channelAutoReadDelay = Duration(seconds: 5);
 
   final TextEditingController _textController = TextEditingController();
   final FocusNode _focusNode = FocusNode();
@@ -57,6 +59,12 @@ class _MessagesTabState extends State<MessagesTab> {
   int _messageByteCount = 0;
   String? _highlightedMessageId;
   Timer? _highlightTimer; // Timer for clearing message highlight
+  Timer? _channelReadTimer;
+  String? _pendingChannelReadKey;
+  bool _suppressMentionTrigger = false;
+  TextRange? _activeMentionRange;
+  String _mentionQuery = '';
+  List<Contact> _mentionSuggestions = const [];
 
   // Message destination state
   String _destinationType =
@@ -71,7 +79,7 @@ class _MessagesTabState extends State<MessagesTab> {
   final VoiceRecorderService _voiceRecorder = VoiceRecorderService();
   bool _isRecording = false;
   bool _isSendingVoice = false;
-  static const int _maxVoicePackets = 10;
+  static const Duration _maxVoiceRecordingDuration = Duration(seconds: 30);
   static const double _silenceRmsThreshold = 500.0;
   static const double _silencePeakThreshold = 1400.0;
   static const int _maxInteriorSilentChunks = 2;
@@ -85,16 +93,17 @@ class _MessagesTabState extends State<MessagesTab> {
   @override
   void initState() {
     super.initState();
-    _textController.addListener(_updateCharacterCount);
+    _textController.addListener(_handleComposerChanged);
+    _focusNode.addListener(_handleFocusChanged);
     // Load saved message destination
     _loadSavedDestination();
-    _loadVoiceBitrate();
+    _loadVoiceSettings();
     WidgetsBinding.instance.addPostFrameCallback((_) {
       _checkForNavigationRequest();
     });
   }
 
-  Future<void> _loadVoiceBitrate() async {
+  Future<void> _loadVoiceSettings() async {
     final bitrate = await VoiceBitratePreferences.getBitrate();
     if (!mounted) return;
     setState(() {
@@ -115,14 +124,24 @@ class _MessagesTabState extends State<MessagesTab> {
   @override
   void dispose() {
     _highlightTimer?.cancel();
+    _channelReadTimer?.cancel();
     _voiceStreamSub?.cancel();
     _voiceRecorder.dispose();
+    _focusNode.removeListener(_handleFocusChanged);
     _textController.dispose();
     _focusNode.dispose();
     _scrollController.dispose();
     super.dispose();
   }
 
+  @override
+  void didUpdateWidget(covariant MessagesTab oldWidget) {
+    super.didUpdateWidget(oldWidget);
+    if (oldWidget.isActive != widget.isActive) {
+      _syncChannelAutoReadTimer(context.read<MessagesProvider>());
+    }
+  }
+
   void _checkForNavigationRequest() {
     final messagesProvider = context.read<MessagesProvider>();
     final targetMessageId = messagesProvider.targetMessageId;
@@ -144,9 +163,13 @@ class _MessagesTabState extends State<MessagesTab> {
 
   void _scrollToMessage(String messageId) {
     final messagesProvider = context.read<MessagesProvider>();
-    final messages = _getFilteredMessages(messagesProvider);
+    final messages = messagesProvider.buildDisplayMessages(
+      _getFilteredMessages(messagesProvider),
+    );
 
-    final messageIndex = messages.indexWhere((m) => m.id == messageId);
+    final messageIndex = messages.indexWhere(
+      (entry) => entry.message.id == messageId,
+    );
 
     if (messageIndex != -1 && _scrollController.hasClients) {
       // Calculate position - accounting for reverse list
@@ -177,12 +200,130 @@ class _MessagesTabState extends State<MessagesTab> {
     }
   }
 
+  void _handleComposerChanged() {
+    _updateCharacterCount();
+
+    if (_suppressMentionTrigger) {
+      return;
+    }
+
+    _updateMentionSuggestions(_textController.value);
+  }
+
   void _updateCharacterCount() {
     setState(() {
       _messageByteCount = utf8.encode(_textController.text).length;
     });
   }
 
+  void _handleFocusChanged() {
+    if (!_focusNode.hasFocus) {
+      _clearMentionSuggestions();
+      return;
+    }
+
+    if (_suppressMentionTrigger) {
+      return;
+    }
+
+    _updateMentionSuggestions(_textController.value);
+  }
+
+  void _updateMentionSuggestions(TextEditingValue value) {
+    final triggerRange = _getMentionTriggerRange(value);
+    if (triggerRange == null) {
+      _clearMentionSuggestions();
+      return;
+    }
+
+    final query = value.text.substring(
+      triggerRange.start + 1,
+      triggerRange.end,
+    );
+    final contacts = _buildMentionSuggestions(query);
+    if (!mounted) {
+      return;
+    }
+
+    setState(() {
+      _activeMentionRange = triggerRange;
+      _mentionQuery = query;
+      _mentionSuggestions = contacts;
+    });
+  }
+
+  void _clearMentionSuggestions() {
+    if (_activeMentionRange == null &&
+        _mentionQuery.isEmpty &&
+        _mentionSuggestions.isEmpty) {
+      return;
+    }
+
+    setState(() {
+      _activeMentionRange = null;
+      _mentionQuery = '';
+      _mentionSuggestions = const [];
+    });
+  }
+
+  TextRange? _getMentionTriggerRange(TextEditingValue value) {
+    if (!value.selection.isValid || !value.selection.isCollapsed) {
+      return null;
+    }
+
+    final cursorOffset = value.selection.baseOffset;
+    if (cursorOffset <= 0) {
+      return null;
+    }
+
+    final text = value.text;
+    final triggerStart = text.lastIndexOf('@', cursorOffset - 1);
+    if (triggerStart == -1) {
+      return null;
+    }
+
+    final leadingChar = triggerStart > 0 ? text[triggerStart - 1] : null;
+    if (leadingChar != null && !RegExp(r'[\s\(\[\{]').hasMatch(leadingChar)) {
+      return null;
+    }
+
+    final query = text.substring(triggerStart + 1, cursorOffset);
+    if (query.contains(RegExp(r'[\s@\[\]\n\r]'))) {
+      return null;
+    }
+
+    return TextRange(start: triggerStart, end: cursorOffset);
+  }
+
+  List<Contact> _buildMentionSuggestions(String query) {
+    final contactsProvider = context.read<ContactsProvider>();
+    final normalizedQuery = query.trim().toLowerCase();
+    final contacts =
+        contactsProvider.contacts
+            .where((contact) => contact.type == ContactType.chat)
+            .where((contact) {
+              if (normalizedQuery.isEmpty) return true;
+              return contact.displayName.toLowerCase().contains(
+                normalizedQuery,
+              );
+            })
+            .toList()
+          ..sort((a, b) {
+            final aName = a.displayName.toLowerCase();
+            final bName = b.displayName.toLowerCase();
+            final aStarts =
+                normalizedQuery.isNotEmpty && aName.startsWith(normalizedQuery);
+            final bStarts =
+                normalizedQuery.isNotEmpty && bName.startsWith(normalizedQuery);
+            if (aStarts != bStarts) {
+              return aStarts ? -1 : 1;
+            }
+            return aName.compareTo(bName);
+          });
+
+    return contacts.take(8).toList(growable: false);
+  }
+
   int get _maxMessageBytes =>
       _destinationType == MessageDestinationPreferences.destinationTypeChannel
       ? _maxChannelMessageBytes
@@ -338,13 +479,13 @@ class _MessagesTabState extends State<MessagesTab> {
     _focusNode.requestFocus();
   }
 
-  void _insertReplyMention(String displayName) {
+  void _insertReplyMention(String displayName, {TextRange? replacementRange}) {
     final trimmedName = displayName.trim();
     if (trimmedName.isEmpty) return;
 
     final mention = '@[$trimmedName] ';
     final value = _textController.value;
-    final selection = value.selection;
+    final selection = replacementRange ?? value.selection;
     final hasSelection =
         selection.isValid &&
         selection.start >= 0 &&
@@ -355,18 +496,30 @@ class _MessagesTabState extends State<MessagesTab> {
     final nextText = value.text.replaceRange(start, end, mention);
     final nextOffset = start + mention.length;
 
+    _suppressMentionTrigger = true;
     _textController.value = value.copyWith(
       text: nextText,
       selection: TextSelection.collapsed(offset: nextOffset),
       composing: TextRange.empty,
     );
+    _suppressMentionTrigger = false;
+    _clearMentionSuggestions();
     _enforceMessageByteLimit();
   }
 
+  void _selectMention(Contact contact) {
+    _insertReplyMention(
+      contact.displayName,
+      replacementRange: _activeMentionRange,
+    );
+    _focusNode.requestFocus();
+  }
+
   Future<void> _replyToMessage(Message message) async {
     final l10n = AppLocalizations.of(context)!;
     final contactsProvider = context.read<ContactsProvider>();
     Contact? senderContact;
+    String? senderDisplayName;
 
     String destinationType;
     Contact? recipient;
@@ -391,28 +544,48 @@ class _MessagesTabState extends State<MessagesTab> {
       if (senderPrefix != null && senderPrefix.length >= 6) {
         senderContact = contactsProvider.findContactByPrefix(senderPrefix);
       }
+      senderDisplayName =
+          senderContact?.displayName ?? message.senderName?.trim();
     } else {
-      final senderPrefix = message.senderPublicKeyPrefix;
-      if (senderPrefix == null || senderPrefix.length < 6) {
-        ToastLogger.error(context, l10n.cannotReplySenderMissing);
-        return;
-      }
+      final roomRecipient = message.recipientPublicKey == null
+          ? null
+          : contactsProvider.findContactByKey(message.recipientPublicKey!);
 
-      recipient = contactsProvider.findContactByPrefix(senderPrefix);
-      if (recipient == null) {
-        ToastLogger.error(context, l10n.cannotReplyContactNotFound);
-        return;
-      }
+      if (roomRecipient?.isRoom == true) {
+        destinationType = MessageDestinationPreferences.destinationTypeRoom;
+        recipient = roomRecipient;
 
-      destinationType = recipient.isRoom
-          ? MessageDestinationPreferences.destinationTypeRoom
-          : MessageDestinationPreferences.destinationTypeContact;
+        final senderPrefix = message.senderPublicKeyPrefix;
+        if (senderPrefix != null && senderPrefix.length >= 6) {
+          senderContact = contactsProvider.findContactByPrefix(senderPrefix);
+        }
+        senderDisplayName =
+            senderContact?.displayName ?? message.senderName?.trim();
+      } else {
+        final senderPrefix = message.senderPublicKeyPrefix;
+        if (senderPrefix == null || senderPrefix.length < 6) {
+          ToastLogger.error(context, l10n.cannotReplySenderMissing);
+          return;
+        }
+
+        recipient = contactsProvider.findContactByPrefix(senderPrefix);
+        if (recipient == null) {
+          ToastLogger.error(context, l10n.cannotReplyContactNotFound);
+          return;
+        }
+
+        destinationType = recipient.isRoom
+            ? MessageDestinationPreferences.destinationTypeRoom
+            : MessageDestinationPreferences.destinationTypeContact;
+      }
     }
 
     await _onRecipientSelected(destinationType, recipient);
     if (!mounted) return;
-    if (message.isChannelMessage && senderContact != null) {
-      _insertReplyMention(senderContact.displayName);
+    if ((message.isChannelMessage || recipient?.isRoom == true) &&
+        senderDisplayName != null &&
+        senderDisplayName.isNotEmpty) {
+      _insertReplyMention(senderDisplayName);
     }
     _focusNode.requestFocus();
   }
@@ -467,6 +640,9 @@ class _MessagesTabState extends State<MessagesTab> {
       return;
     }
 
+    _textController.clear();
+    _focusNode.unfocus();
+
     try {
       // Check destination type and send accordingly
       if (_destinationType ==
@@ -497,13 +673,18 @@ class _MessagesTabState extends State<MessagesTab> {
         await _sendToChannel(text, connectionProvider, messagesProvider, 0);
       }
 
-      _textController.clear();
-      _focusNode.unfocus();
       _markCurrentDestinationAsRead();
 
       if (!mounted) return;
     } catch (e) {
       if (!mounted) return;
+      if (_textController.text.isEmpty) {
+        _textController.text = text;
+        _textController.selection = TextSelection.collapsed(
+          offset: _textController.text.length,
+        );
+        _focusNode.requestFocus();
+      }
       ToastLogger.error(context, 'Failed to send: $e');
     }
   }
@@ -817,7 +998,7 @@ class _MessagesTabState extends State<MessagesTab> {
   Future<void> _startVoiceRecording() async {
     if (_isSendingVoice || _isRecording) return;
     debugPrint('🎙️ [Voice] _startVoiceRecording called');
-    // Read fresh bitrate preference so settings changes apply immediately.
+    // Read fresh voice preferences so settings changes apply immediately.
     final selectedBitrate = await VoiceBitratePreferences.getBitrate();
     if (mounted) {
       setState(() {
@@ -856,11 +1037,12 @@ class _MessagesTabState extends State<MessagesTab> {
       _selectedVoiceBitrate,
     );
     final packetDuration = Duration(
-      milliseconds: codec2ModeFor(_activeVoiceMode!).packetDurationMs,
+      milliseconds: _activeVoiceMode!.packetDurationMs,
     );
+    final maxVoicePackets = _maxVoicePacketsForMode(_activeVoiceMode!);
 
     debugPrint(
-      '🎙️ [Voice] session=$_currentVoiceSessionId mode=$_activeVoiceMode chunkDuration=${packetDuration.inMilliseconds}ms',
+      '🎙️ [Voice] session=$_currentVoiceSessionId mode=$_activeVoiceMode chunkDuration=${packetDuration.inMilliseconds}ms maxPackets=$maxVoicePackets',
     );
 
     _recordedChunks.clear();
@@ -869,9 +1051,13 @@ class _MessagesTabState extends State<MessagesTab> {
     try {
       final stream = _voiceRecorder.startCapture(
         chunkDuration: packetDuration,
+        sampleRateHz: _activeVoiceMode!.sampleRateHz,
         enableBandPassFilter: appProvider.isVoiceBandPassFilterEnabled,
         enableCompressor: appProvider.isVoiceCompressorEnabled,
         enableLimiter: appProvider.isVoiceLimiterEnabled,
+        enableAutoGain: appProvider.isVoiceAutoGainEnabled,
+        enableEchoCancellation: appProvider.isVoiceEchoCancellationEnabled,
+        enableNoiseSuppression: appProvider.isVoiceNoiseSuppressionEnabled,
       );
       debugPrint('🎙️ [Voice] capture started, listening for chunks...');
       _voiceStreamSub = stream.listen(
@@ -882,7 +1068,7 @@ class _MessagesTabState extends State<MessagesTab> {
             '🎙️ [Voice] chunk #${_recordedChunks.length} received: ${pcmChunk.length} samples',
           );
           setState(() {});
-          if (_recordedChunks.length >= _maxVoicePackets) {
+          if (_recordedChunks.length >= maxVoicePackets) {
             debugPrint('🎙️ [Voice] max packets reached, stopping');
             _stopAndSendVoice();
           }
@@ -899,6 +1085,12 @@ class _MessagesTabState extends State<MessagesTab> {
     }
   }
 
+  int _maxVoicePacketsForMode(VoicePacketMode mode) {
+    final packets =
+        _maxVoiceRecordingDuration.inMilliseconds ~/ mode.packetDurationMs;
+    return packets < 1 ? 1 : packets;
+  }
+
   Future<void> _stopAndSendVoice() async {
     if (!_isRecording) return;
     final trimSilenceEnabled = context
@@ -913,9 +1105,14 @@ class _MessagesTabState extends State<MessagesTab> {
     await _voiceRecorder.stopCapture();
 
     final rawChunks = List<Int16List>.from(_recordedChunks);
-    final chunks = trimSilenceEnabled ? _trimSilence(rawChunks) : rawChunks;
+    final trimmedChunks = trimSilenceEnabled
+        ? _trimSilence(rawChunks)
+        : rawChunks;
     final sessionId = _currentVoiceSessionId;
     final mode = _activeVoiceMode;
+    final chunks = mode == null
+        ? trimmedChunks
+        : _prepareChunksForSending(trimmedChunks, mode);
     _recordedChunks.clear();
 
     debugPrint(
@@ -1104,6 +1301,13 @@ class _MessagesTabState extends State<MessagesTab> {
     messagesProvider.markMessageSent(msgId, 0, 0);
   }
 
+  List<Int16List> _prepareChunksForSending(
+    List<Int16List> chunks,
+    VoicePacketMode mode,
+  ) {
+    return chunks;
+  }
+
   List<Int16List> _trimSilence(List<Int16List> chunks) {
     if (chunks.isEmpty) return chunks;
 
@@ -1133,16 +1337,28 @@ class _MessagesTabState extends State<MessagesTab> {
   bool _isSilentChunk(Int16List chunk) {
     if (chunk.isEmpty) return true;
 
+    final rms = _chunkRms(chunk);
+    final peak = _chunkPeak(chunk);
+    return rms < _silenceRmsThreshold && peak < _silencePeakThreshold;
+  }
+
+  double _chunkRms(Int16List chunk) {
     var sumSquares = 0.0;
+    for (final sample in chunk) {
+      sumSquares += sample * sample;
+    }
+    return math.sqrt(sumSquares / chunk.length);
+  }
+
+  int _chunkPeak(Int16List chunk) {
     var peak = 0;
     for (final sample in chunk) {
       final absSample = sample.abs();
-      if (absSample > peak) peak = absSample;
-      sumSquares += sample * sample;
+      if (absSample > peak) {
+        peak = absSample;
+      }
     }
-
-    final rms = math.sqrt(sumSquares / chunk.length);
-    return rms < _silenceRmsThreshold && peak < _silencePeakThreshold;
+    return peak;
   }
 
   bool _isPublicChannelSelected() {
@@ -1677,12 +1893,64 @@ class _MessagesTabState extends State<MessagesTab> {
   }
 
   void _markCurrentDestinationAsRead() {
+    _channelReadTimer?.cancel();
+    _pendingChannelReadKey = null;
     context.read<MessagesProvider>().markDestinationAsRead(
       destinationType: _destinationType,
       contact: _selectedRecipient,
     );
   }
 
+  void _syncChannelAutoReadTimer(MessagesProvider messagesProvider) {
+    if (!widget.isActive ||
+        _destinationType !=
+            MessageDestinationPreferences.destinationTypeChannel) {
+      _channelReadTimer?.cancel();
+      _pendingChannelReadKey = null;
+      return;
+    }
+
+    final channelIdx = _selectedRecipient?.publicKey[1] ?? 0;
+    final unreadCount = messagesProvider.getUnreadCountForChannel(channelIdx);
+
+    if (unreadCount <= 0) {
+      _channelReadTimer?.cancel();
+      _pendingChannelReadKey = null;
+      return;
+    }
+
+    final nextKey = '$channelIdx:$unreadCount';
+    if (_pendingChannelReadKey == nextKey &&
+        _channelReadTimer?.isActive == true) {
+      return;
+    }
+
+    _channelReadTimer?.cancel();
+    _pendingChannelReadKey = nextKey;
+    _channelReadTimer = Timer(_channelAutoReadDelay, () {
+      if (!mounted || !widget.isActive) {
+        return;
+      }
+
+      if (_destinationType !=
+          MessageDestinationPreferences.destinationTypeChannel) {
+        return;
+      }
+
+      final currentChannelIdx = _selectedRecipient?.publicKey[1] ?? 0;
+      if (currentChannelIdx != channelIdx) {
+        return;
+      }
+
+      final latestProvider = context.read<MessagesProvider>();
+      if (latestProvider.getUnreadCountForChannel(channelIdx) <= 0) {
+        return;
+      }
+
+      _markCurrentDestinationAsRead();
+    });
+  }
+
   List<Message> _getFilteredMessages(MessagesProvider messagesProvider) {
     // Get all recent messages
     final allMessages = messagesProvider.getRecentMessages(count: 100);
@@ -1775,7 +2043,10 @@ class _MessagesTabState extends State<MessagesTab> {
   Widget build(BuildContext context) {
     return Consumer<MessagesProvider>(
       builder: (context, messagesProvider, child) {
-        final messages = _getFilteredMessages(messagesProvider);
+        _syncChannelAutoReadTimer(messagesProvider);
+        final messages = messagesProvider.buildDisplayMessages(
+          _getFilteredMessages(messagesProvider),
+        );
         final bottomInset = MediaQuery.of(context).viewPadding.bottom;
         final composerBottomPadding = bottomInset > 0 ? 2.0 : 10.0;
 
@@ -1813,6 +2084,9 @@ class _MessagesTabState extends State<MessagesTab> {
                   bottomPadding: composerBottomPadding,
                   destinationLabel: _getDestinationLabel(),
                   destinationAvatar: _buildDestinationAvatar(context),
+                  mentionSuggestions: _mentionSuggestions,
+                  mentionQuery: _mentionQuery,
+                  onMentionSelected: _selectMention,
                   onShowComposerActions: _showComposerActions,
                   onShowRecipientSelector: _showRecipientSelector,
                   onStartVoiceRecording: _startVoiceRecording,

lib/screens/packet_log_screen.dart

@@ -777,13 +777,7 @@ class _DecodedRouteSection extends StatelessWidget {
               ),
             )
             .toList();
-        final originalSender = resolvedPath.isEmpty ? null : resolvedPath.first;
-
-        return _RouteSection(
-          route: decodedRoute,
-          path: resolvedPath,
-          originalSender: originalSender,
-        );
+        return _RouteSection(route: decodedRoute, path: resolvedPath);
       },
     );
   }
@@ -827,13 +821,8 @@ class _DecodedRouteSection extends StatelessWidget {
 class _RouteSection extends StatelessWidget {
   final DecodedLogRxRoute route;
   final List<ResolvedNodeHash> path;
-  final ResolvedNodeHash? originalSender;
 
-  const _RouteSection({
-    required this.route,
-    required this.path,
-    required this.originalSender,
-  });
+  const _RouteSection({required this.route, required this.path});
 
   @override
   Widget build(BuildContext context) {
@@ -879,12 +868,6 @@ class _RouteSection extends StatelessWidget {
                 value:
                     '${route.hashSize} byte${route.hashSize == 1 ? '' : 's'}',
               ),
-              if (originalSender != null)
-                _FactCard(
-                  icon: Icons.person_pin_circle,
-                  label: 'Original sender',
-                  value: _nodeLabel(originalSender!),
-                ),
             ],
           ),
           const SizedBox(height: 12),

lib/screens/settings_screen.dart

@@ -14,22 +14,23 @@ import '../providers/contacts_provider.dart';
 import '../providers/messages_provider.dart';
 import '../providers/app_provider.dart';
 import '../providers/connection_provider.dart';
+import '../providers/drawing_provider.dart';
+import '../providers/map_provider.dart';
 import '../services/location_tracking_service.dart';
 import '../services/locale_preferences.dart';
 import '../services/mesh_map_nodes_service.dart';
 import '../services/update_checker_service.dart';
-import '../services/voice_codec_service.dart';
 import '../services/voice_bitrate_preferences.dart';
 import '../services/image_preferences.dart';
 import '../services/route_hash_preferences.dart';
 import '../services/image_codec_service.dart';
 import '../services/developer_mode_service.dart';
+import '../services/notification_service.dart';
 import '../utils/sample_data_generator.dart';
 import '../utils/image_message_parser.dart';
 import '../utils/voice_message_parser.dart';
 import '../theme/app_theme.dart';
 import '../l10n/app_localizations.dart';
-import '../widgets/connection_mode_selector.dart';
 import '../widgets/update_dialog.dart';
 import 'sar_template_management_screen.dart';
 import 'welcome_wizard_screen.dart';
@@ -73,6 +74,14 @@ class _SettingsScreenState extends State<SettingsScreen> {
   bool _fastLocationUpdatesEnabled = false;
   double _fastLocationMovementThresholdMeters = 10.0;
   int _fastLocationActiveCadenceSeconds = 10;
+  bool _rotateMapWithHeading = false;
+  bool _showMapDebugInfo = false;
+  bool _openMapInFullscreen = false;
+  bool _messageNotificationsEnabled = true;
+  bool _sarNotificationsEnabled = true;
+  bool _discoveryNotificationsEnabled = true;
+  bool _updateNotificationsEnabled = true;
+  bool _muteForegroundNotifications = true;
   bool _isDeveloperModeEnabled = false;
   DateTime? _onlineTraceCacheUpdatedAt;
   bool _isClearingOnlineTraceCache = false;
@@ -88,12 +97,14 @@ class _SettingsScreenState extends State<SettingsScreen> {
     _loadPackageInfo();
     _initializeLocationService();
     _loadRxTxPreference();
-    _loadVoiceBitratePreference();
+    _loadVoicePreferences();
     _loadRouteHashSizePreference();
     _loadImagePreferences();
     _loadFastLocationSettings();
     _loadDeveloperMode();
     _loadOnlineTraceCacheStatus();
+    _loadMapPreferences();
+    _loadNotificationPreferences();
   }
 
   @override
@@ -131,6 +142,19 @@ class _SettingsScreenState extends State<SettingsScreen> {
     });
   }
 
+  Future<void> _loadNotificationPreferences() async {
+    final service = NotificationService();
+    await service.initialize();
+    if (!mounted) return;
+    setState(() {
+      _messageNotificationsEnabled = service.messageNotificationsEnabled;
+      _sarNotificationsEnabled = service.sarNotificationsEnabled;
+      _discoveryNotificationsEnabled = service.discoveryNotificationsEnabled;
+      _updateNotificationsEnabled = service.updateNotificationsEnabled;
+      _muteForegroundNotifications = service.muteForegroundNotifications;
+    });
+  }
+
   Future<void> _loadOnlineTraceCacheStatus() async {
     final cachedAt = await MeshMapNodesService.cachedAt();
     if (!mounted) return;
@@ -178,7 +202,22 @@ class _SettingsScreenState extends State<SettingsScreen> {
     await prefs.setBool('show_rx_tx_indicators', value);
   }
 
-  Future<void> _loadVoiceBitratePreference() async {
+  Future<void> _loadMapPreferences() async {
+    final prefs = await SharedPreferences.getInstance();
+    if (!mounted) return;
+    setState(() {
+      _rotateMapWithHeading = prefs.getBool('map_rotate_with_heading') ?? false;
+      _showMapDebugInfo = prefs.getBool('map_show_debug_info') ?? false;
+      _openMapInFullscreen = prefs.getBool('map_fullscreen') ?? false;
+    });
+  }
+
+  Future<void> _saveMapPreference(String key, bool value) async {
+    final prefs = await SharedPreferences.getInstance();
+    await prefs.setBool(key, value);
+  }
+
+  Future<void> _loadVoicePreferences() async {
     final value = await VoiceBitratePreferences.getBitrate();
     if (!mounted) return;
     setState(() {
@@ -981,6 +1020,88 @@ class _SettingsScreenState extends State<SettingsScreen> {
             ),
           ]),
 
+          _buildSectionHeader('Notifications'),
+          _buildSettingsCard([
+            SwitchListTile(
+              secondary: const Icon(Icons.chat_bubble_outline),
+              title: const Text('Message notifications'),
+              subtitle: const Text(
+                'Notify for incoming direct and channel messages',
+              ),
+              value: _messageNotificationsEnabled,
+              onChanged: (value) async {
+                setState(() {
+                  _messageNotificationsEnabled = value;
+                });
+                await NotificationService().setMessageNotificationsEnabled(
+                  value,
+                );
+              },
+            ),
+            SwitchListTile(
+              secondary: const Icon(Icons.warning_amber_outlined),
+              title: const Text('SAR alerts'),
+              subtitle: const Text(
+                'Notify for incoming SAR markers such as found person or fire',
+              ),
+              value: _sarNotificationsEnabled,
+              onChanged: (value) async {
+                setState(() {
+                  _sarNotificationsEnabled = value;
+                });
+                await NotificationService().setSarNotificationsEnabled(value);
+              },
+            ),
+            SwitchListTile(
+              secondary: const Icon(Icons.contact_page_outlined),
+              title: const Text('Discovery notifications'),
+              subtitle: const Text(
+                'Notify when new contacts appear in Discovery',
+              ),
+              value: _discoveryNotificationsEnabled,
+              onChanged: (value) async {
+                setState(() {
+                  _discoveryNotificationsEnabled = value;
+                });
+                await NotificationService().setDiscoveryNotificationsEnabled(
+                  value,
+                );
+              },
+            ),
+            SwitchListTile(
+              secondary: const Icon(Icons.system_update),
+              title: const Text('Update notifications'),
+              subtitle: const Text(
+                'Notify when a newer app version is available',
+              ),
+              value: _updateNotificationsEnabled,
+              onChanged: (value) async {
+                setState(() {
+                  _updateNotificationsEnabled = value;
+                });
+                await NotificationService().setUpdateNotificationsEnabled(
+                  value,
+                );
+              },
+            ),
+            SwitchListTile(
+              secondary: const Icon(Icons.visibility_off_outlined),
+              title: const Text('Mute while app is open'),
+              subtitle: const Text(
+                'Do not show local notifications while the app is in the foreground',
+              ),
+              value: _muteForegroundNotifications,
+              onChanged: (value) async {
+                setState(() {
+                  _muteForegroundNotifications = value;
+                });
+                await NotificationService().setMuteForegroundNotifications(
+                  value,
+                );
+              },
+            ),
+          ]),
+
           _buildSectionHeader('Navigation'),
           _buildSettingsCard([
             Consumer<AppProvider>(
@@ -1026,19 +1147,6 @@ class _SettingsScreenState extends State<SettingsScreen> {
 
           _buildSectionHeader('Messaging'),
           _buildSettingsCard([
-            Consumer<AppProvider>(
-              builder: (context, appProvider, child) => SwitchListTile(
-                secondary: const Icon(Icons.person_add_alt_1),
-                title: const Text('Auto-add discovered contacts'),
-                subtitle: const Text(
-                  'Automatically fetch and add new contacts when they are discovered',
-                ),
-                value: appProvider.autoAddDiscoveredContacts,
-                onChanged: (value) async {
-                  await appProvider.toggleAutoAddDiscoveredContacts(value);
-                },
-              ),
-            ),
             ListTile(
               leading: const Icon(Icons.alt_route),
               title: const Text('Route path byte size'),
@@ -1155,6 +1263,88 @@ class _SettingsScreenState extends State<SettingsScreen> {
             ),
           ]),
 
+          _buildSectionHeader('Map'),
+          _buildSettingsCard([
+            SwitchListTile(
+              secondary: const Icon(Icons.explore),
+              title: const Text('Rotate map with heading'),
+              subtitle: const Text(
+                'Rotate the map based on your compass or movement heading',
+              ),
+              value: _rotateMapWithHeading,
+              onChanged: (value) async {
+                setState(() {
+                  _rotateMapWithHeading = value;
+                });
+                await _saveMapPreference('map_rotate_with_heading', value);
+              },
+            ),
+            SwitchListTile(
+              secondary: const Icon(Icons.bug_report_outlined),
+              title: const Text('Show map debug info'),
+              subtitle: const Text(
+                'Display extra map diagnostics and internal state overlays',
+              ),
+              value: _showMapDebugInfo,
+              onChanged: (value) async {
+                setState(() {
+                  _showMapDebugInfo = value;
+                });
+                await _saveMapPreference('map_show_debug_info', value);
+              },
+            ),
+            SwitchListTile(
+              secondary: const Icon(Icons.fullscreen),
+              title: const Text('Open map in fullscreen'),
+              subtitle: const Text(
+                'Start the map tab in fullscreen mode by default',
+              ),
+              value: _openMapInFullscreen,
+              onChanged: (value) async {
+                setState(() {
+                  _openMapInFullscreen = value;
+                });
+                await _saveMapPreference('map_fullscreen', value);
+              },
+            ),
+            Consumer<DrawingProvider>(
+              builder: (context, drawingProvider, child) => SwitchListTile(
+                secondary: const Icon(Icons.fmd_good_outlined),
+                title: const Text('Show SAR markers'),
+                subtitle: const Text('Display SAR markers on the main map'),
+                value: drawingProvider.showSarMarkers,
+                onChanged: (value) {
+                  drawingProvider.toggleSarMarkers();
+                },
+              ),
+            ),
+            Consumer<MapProvider>(
+              builder: (context, mapProvider, child) => SwitchListTile(
+                secondary: const Icon(Icons.timeline),
+                title: const Text('Show all contact trails'),
+                subtitle: const Text(
+                  'Display location trails for all contacts that have history',
+                ),
+                value: mapProvider.showAllContactTrails,
+                onChanged: (value) async {
+                  await mapProvider.toggleAllContactTrails();
+                },
+              ),
+            ),
+            Consumer<MapProvider>(
+              builder: (context, mapProvider, child) => SwitchListTile(
+                secondary: const Icon(Icons.router_outlined),
+                title: const Text('Hide repeaters on map'),
+                subtitle: const Text(
+                  'Hide repeater contacts from the main map view',
+                ),
+                value: mapProvider.hideRepeatersOnMap,
+                onChanged: (value) async {
+                  await mapProvider.setHideRepeatersOnMap(value);
+                },
+              ),
+            ),
+          ]),
           _buildSectionHeader('Voice'),
           Consumer2<AppProvider, ConnectionProvider>(
             builder: (context, appProvider, connectionProvider, child) =>
@@ -1164,6 +1354,11 @@ class _SettingsScreenState extends State<SettingsScreen> {
                   bandPassEnabled: appProvider.isVoiceBandPassFilterEnabled,
                   compressorEnabled: appProvider.isVoiceCompressorEnabled,
                   limiterEnabled: appProvider.isVoiceLimiterEnabled,
+                  autoGainEnabled: appProvider.isVoiceAutoGainEnabled,
+                  echoCancellationEnabled:
+                      appProvider.isVoiceEchoCancellationEnabled,
+                  noiseSuppressionEnabled:
+                      appProvider.isVoiceNoiseSuppressionEnabled,
                   silenceTrimEnabled: appProvider.isVoiceSilenceTrimmingEnabled,
                 ),
           ),
@@ -1210,6 +1405,43 @@ class _SettingsScreenState extends State<SettingsScreen> {
                 },
               ),
             ),
+            Consumer<AppProvider>(
+              builder: (context, appProvider, child) => SwitchListTile(
+                secondary: const Icon(Icons.auto_fix_high),
+                title: const Text('Mic auto gain'),
+                subtitle: const Text('Lets the recorder adjust input level'),
+                value: appProvider.isVoiceAutoGainEnabled,
+                onChanged: (value) async {
+                  await appProvider.toggleVoiceAutoGainEnabled(value);
+                },
+              ),
+            ),
+            Consumer<AppProvider>(
+              builder: (context, appProvider, child) => SwitchListTile(
+                secondary: const Icon(Icons.hearing_disabled),
+                title: const Text('Echo cancellation'),
+                subtitle: const Text(
+                  'Uses recorder echo cancellation if available',
+                ),
+                value: appProvider.isVoiceEchoCancellationEnabled,
+                onChanged: (value) async {
+                  await appProvider.toggleVoiceEchoCancellationEnabled(value);
+                },
+              ),
+            ),
+            Consumer<AppProvider>(
+              builder: (context, appProvider, child) => SwitchListTile(
+                secondary: const Icon(Icons.noise_control_off),
+                title: const Text('Noise suppression'),
+                subtitle: const Text(
+                  'Uses recorder noise suppression if available',
+                ),
+                value: appProvider.isVoiceNoiseSuppressionEnabled,
+                onChanged: (value) async {
+                  await appProvider.toggleVoiceNoiseSuppressionEnabled(value);
+                },
+              ),
+            ),
             Consumer<AppProvider>(
               builder: (context, appProvider, child) => SwitchListTile(
                 secondary: const Icon(Icons.content_cut),
@@ -1321,11 +1553,6 @@ class _SettingsScreenState extends State<SettingsScreen> {
             ),
           ]),
 
-          if (!kIsWeb) ...[
-            _buildSectionHeader('Network Sharing'),
-            const ConnectionModeSelector(),
-          ],
-
           _buildSectionHeader(AppLocalizations.of(context)!.permissionsSection),
           _buildSettingsCard([
             SwitchListTile(
@@ -1648,7 +1875,7 @@ class _SettingsScreenState extends State<SettingsScreen> {
                     style: Theme.of(context).textTheme.bodySmall,
                   ),
                 ),
-                Switch.adaptive(
+                Switch(
                   value: _showCurrentImagePreview,
                   onChanged: (value) {
                     setState(() => _showCurrentImagePreview = value);
@@ -1729,6 +1956,9 @@ class _SettingsScreenState extends State<SettingsScreen> {
     required bool bandPassEnabled,
     required bool compressorEnabled,
     required bool limiterEnabled,
+    required bool autoGainEnabled,
+    required bool echoCancellationEnabled,
+    required bool noiseSuppressionEnabled,
     required bool silenceTrimEnabled,
   }) {
     final supported = VoiceBitratePreferences.supportedBitrates;
@@ -1741,6 +1971,9 @@ class _SettingsScreenState extends State<SettingsScreen> {
         (bandPassEnabled ? 1 : 0) +
         (compressorEnabled ? 1 : 0) +
         (limiterEnabled ? 1 : 0) +
+        (autoGainEnabled ? 1 : 0) +
+        (echoCancellationEnabled ? 1 : 0) +
+        (noiseSuppressionEnabled ? 1 : 0) +
         (silenceTrimEnabled ? 1 : 0);
     final radioBw = connectionProvider.deviceInfo.radioBw;
     final radioSf = connectionProvider.deviceInfo.radioSf;
@@ -1748,7 +1981,7 @@ class _SettingsScreenState extends State<SettingsScreen> {
     final bwHz = _resolveBandwidthHz(radioBw);
     final voiceMode = VoiceBitratePreferences.toVoiceMode(bitrate);
     const voicePreviewMs = 10000; // 10-second reference clip
-    final packetDurationMs = codec2ModeFor(voiceMode).packetDurationMs;
+    final packetDurationMs = voiceMode.packetDurationMs;
     final voicePacketCount =
         (voicePreviewMs + packetDurationMs - 1) ~/ packetDurationMs;
     final voiceDirect = estimateVoiceTransmitDuration(
@@ -1783,7 +2016,7 @@ class _SettingsScreenState extends State<SettingsScreen> {
             ),
             const SizedBox(height: 8),
             Text(
-              'Bitrate: $bitrate bps',
+              'Codec: ${voiceMode.label} · $bitrate bps',
               style: Theme.of(context).textTheme.bodySmall,
             ),
             const SizedBox(height: 4),
@@ -1830,6 +2063,31 @@ class _SettingsScreenState extends State<SettingsScreen> {
               ],
             ),
             const SizedBox(height: 8),
+            Row(
+              children: [
+                Expanded(
+                  child: _voiceStatChip(
+                    label: 'Auto gain',
+                    enabled: autoGainEnabled,
+                  ),
+                ),
+                const SizedBox(width: 8),
+                Expanded(
+                  child: _voiceStatChip(
+                    label: 'Echo cancel',
+                    enabled: echoCancellationEnabled,
+                  ),
+                ),
+                const SizedBox(width: 8),
+                Expanded(
+                  child: _voiceStatChip(
+                    label: 'Noise suppress',
+                    enabled: noiseSuppressionEnabled,
+                  ),
+                ),
+              ],
+            ),
+            const SizedBox(height: 8),
             Row(
               children: [
                 Expanded(
@@ -1842,7 +2100,7 @@ class _SettingsScreenState extends State<SettingsScreen> {
             ),
             const SizedBox(height: 8),
             Text(
-              'Processing enabled: $enabledCount/4',
+              'Processing enabled: $enabledCount/7',
               style: Theme.of(context).textTheme.bodySmall,
             ),
           ],

lib/services/cayenne_lpp_parser.dart

@@ -5,6 +5,76 @@ import 'package:meshcore_client/meshcore_client.dart';
 /// Cayenne LPP (Low Power Payload) data parser
 /// Used for decoding telemetry sensor data from MeshCore devices
 class CayenneLppParser {
+  static const int _selfTelemetryChannel = 1;
+  static const int _lppGenericSensor = 100;
+  static const int _lppCurrent = 117;
+  static const int _lppFrequency = 118;
+  static const int _lppPercentage = 120;
+  static const int _lppAltitude = 121;
+  static const int _lppConcentration = 125;
+  static const int _lppPower = 128;
+  static const int _lppSpeed = 129;
+  static const int _lppDistance = 130;
+  static const int _lppEnergy = 131;
+  static const int _lppDirection = 132;
+  static const int _lppUnixTime = 133;
+  static const int _lppColour = 135;
+  static const int _lppGust = 137;
+  static const int _lppDewPoint = 138;
+  static const int _lppRain = 139;
+  static const int _lppSwitch = 142;
+  static const int _lppBinaryBool = 143;
+  static const int _lppBinaryPowerSwitch = 144;
+  static const int _lppBinaryOpen = 145;
+  static const int _lppBinaryBatteryLow = 146;
+  static const int _lppBinaryCharging = 147;
+  static const int _lppBinaryCarbonMonoxide = 148;
+  static const int _lppBinaryCold = 149;
+  static const int _lppBinaryConnectivity = 150;
+  static const int _lppBinaryDoor = 151;
+  static const int _lppBinaryGarageDoor = 152;
+  static const int _lppBinaryGas = 153;
+  static const int _lppBinaryHeat = 154;
+  static const int _lppBinaryLight = 155;
+  static const int _lppBinaryLock = 156;
+  static const int _lppBinaryMoisture = 157;
+  static const int _lppBinaryMotion = 158;
+  static const int _lppBinaryMoving = 159;
+  static const int _lppBinaryOccupancy = 160;
+  static const int _lppBinaryPlug = 161;
+  static const int _lppBinaryPresence = 162;
+  static const int _lppBinaryProblem = 163;
+  static const int _lppBinaryRunning = 164;
+  static const int _lppBinarySafety = 165;
+  static const int _lppBinarySmoke = 166;
+  static const int _lppBinarySound = 167;
+  static const int _lppBinaryTamper = 168;
+  static const int _lppBinaryVibration = 169;
+  static const int _lppBinaryWindow = 170;
+  static const int _lppButtonEvent = 171;
+  static const int _lppDimmer = 172;
+  static const int _lppUv = 173;
+  static const int _lppLightLevel = 174;
+  static const int _lppPm25 = 175;
+  static const int _lppPm10 = 176;
+  static const int _lppCo2 = 177;
+  static const int _lppTvoc = 178;
+  static const int _lppRpm = 179;
+  static const int _lppConductivity = 180;
+  static const int _lppRotation = 181;
+  static const int _lppDuration = 182;
+  static const int _lppAcceleration = 183;
+  static const int _lppGyroRate = 184;
+  static const int _lppVolume = 185;
+  static const int _lppFlowRate = 186;
+  static const int _lppVolumeStorage = 187;
+  static const int _lppWater = 188;
+  static const int _lppGasVolume = 189;
+  static const int _lppMass = 190;
+  static const int _lppSignedSpeed = 191;
+  static const int _lppSignedPower = 192;
+  static const int _lppSignedCurrent = 193;
+
   /// Parse Cayenne LPP data into ContactTelemetry
   static ContactTelemetry parse(Uint8List data) {
     debugPrint('  [CayenneLPP] Parsing LPP data...');
@@ -25,7 +95,8 @@ class CayenneLppParser {
 
     int fieldCount = 0;
     while (reader.hasRemaining) {
-      if (fieldCount > 0 && _isZeroPaddedTail(data, reader.remainingBytesCount)) {
+      if (fieldCount > 0 &&
+          _isZeroPaddedTail(data, reader.remainingBytesCount)) {
         debugPrint(
           '    Detected zero-padded telemetry tail, stopping parse at position '
           '${data.length - reader.remainingBytesCount}',
@@ -65,14 +136,16 @@ class CayenneLppParser {
             final value = rawValue / 100.0;
             debugPrint('      Analog Input (raw): $rawValue');
             debugPrint('      Analog Input (volts): ${value}V');
-            extraSensorData['analog_input_$channel'] = value;
-            // If this is a battery reading
-            if (channel == 0 || channel == 1) {
+            if (_isBatteryChannel(channel)) {
               batteryMilliVolts = value * 1000;
               batteryPercentage = _calculateBatteryPercentage(value);
+              extraSensorData[_sourceChannelKey('battery')] = channel;
+              extraSensorData[_sourceChannelKey('voltage')] = channel;
               debugPrint(
                 '      → Battery: ${batteryPercentage.toStringAsFixed(1)}% (${batteryMilliVolts.toStringAsFixed(0)}mV)',
               );
+            } else {
+              extraSensorData['analog_input_$channel'] = value;
             }
             break;
 
@@ -85,7 +158,7 @@ class CayenneLppParser {
             break;
 
           case MeshCoreConstants.lppIlluminanceSensor:
-            final value = reader.readUInt16BE();
+            final value = reader.readUInt16BE().toDouble();
             debugPrint('      Illuminance: $value lux');
             extraSensorData['illuminance_$channel'] = value;
             break;
@@ -98,18 +171,36 @@ class CayenneLppParser {
 
           case MeshCoreConstants.lppTemperatureSensor:
             final rawValue = reader.readInt16BE();
-            temperature = rawValue / 10.0;
+            final value = rawValue / 10.0;
             debugPrint('      Temperature (raw): $rawValue');
-            debugPrint(
-              '      Temperature: ${temperature.toStringAsFixed(1)}°C',
-            );
+            debugPrint('      Temperature: ${value.toStringAsFixed(1)}°C');
+            if (channel == _selfTelemetryChannel) {
+              temperature = value;
+              extraSensorData[_sourceChannelKey('temperature')] = channel;
+            } else {
+              extraSensorData['temperature_$channel'] = value;
+              if (temperature == null) {
+                temperature = value;
+                extraSensorData[_sourceChannelKey('temperature')] = channel;
+              }
+            }
             break;
 
           case MeshCoreConstants.lppHumiditySensor:
             final rawValue = reader.readByte();
-            humidity = rawValue / 2.0;
+            final value = rawValue / 2.0;
             debugPrint('      Humidity (raw): $rawValue');
-            debugPrint('      Humidity: ${humidity.toStringAsFixed(1)}%');
+            debugPrint('      Humidity: ${value.toStringAsFixed(1)}%');
+            if (channel == _selfTelemetryChannel) {
+              humidity = value;
+              extraSensorData[_sourceChannelKey('humidity')] = channel;
+            } else {
+              extraSensorData['humidity_$channel'] = value;
+              if (humidity == null) {
+                humidity = value;
+                extraSensorData[_sourceChannelKey('humidity')] = channel;
+              }
+            }
             break;
 
           case MeshCoreConstants.lppAccelerometer:
@@ -126,9 +217,19 @@ class CayenneLppParser {
 
           case MeshCoreConstants.lppBarometer:
             final rawValue = reader.readUInt16BE();
-            pressure = rawValue / 10.0;
+            final value = rawValue / 10.0;
             debugPrint('      Barometer (raw): $rawValue');
-            debugPrint('      Barometer: ${pressure.toStringAsFixed(1)} hPa');
+            debugPrint('      Barometer: ${value.toStringAsFixed(1)} hPa');
+            if (channel == _selfTelemetryChannel) {
+              pressure = value;
+              extraSensorData[_sourceChannelKey('pressure')] = channel;
+            } else {
+              extraSensorData['pressure_$channel'] = value;
+              if (pressure == null) {
+                pressure = value;
+                extraSensorData[_sourceChannelKey('pressure')] = channel;
+              }
+            }
             break;
 
           case MeshCoreConstants.lppVoltageSensor:
@@ -136,12 +237,17 @@ class CayenneLppParser {
             final value = rawValue / 100.0;
             debugPrint('      Voltage (raw): $rawValue');
             debugPrint('      Voltage: ${value}V');
-            // Treat voltage sensor as battery reading
-            batteryMilliVolts = value * 1000;
-            batteryPercentage = _calculateBatteryPercentage(value);
-            debugPrint(
-              '      → Battery: ${batteryPercentage.toStringAsFixed(1)}% (${batteryMilliVolts.toStringAsFixed(0)}mV)',
-            );
+            if (_isBatteryChannel(channel)) {
+              batteryMilliVolts = value * 1000;
+              batteryPercentage = _calculateBatteryPercentage(value);
+              extraSensorData[_sourceChannelKey('battery')] = channel;
+              extraSensorData[_sourceChannelKey('voltage')] = channel;
+              debugPrint(
+                '      → Battery: ${batteryPercentage.toStringAsFixed(1)}% (${batteryMilliVolts.toStringAsFixed(0)}mV)',
+              );
+            } else {
+              extraSensorData['voltage_$channel'] = value;
+            }
             break;
 
           case MeshCoreConstants.lppGyrometer:
@@ -194,15 +300,328 @@ class CayenneLppParser {
             }
 
             gpsLocation = LatLng(lat, lon);
+            extraSensorData[_sourceChannelKey('gps')] = channel;
             extraSensorData['altitude_$channel'] = alt;
             break;
 
+          case _lppGenericSensor:
+            final value = _readUInt32BE(reader).toDouble();
+            debugPrint('      Generic Sensor: $value');
+            extraSensorData['generic_sensor_$channel'] = value;
+            break;
+
+          case _lppCurrent:
+            final rawValue = reader.readInt16BE();
+            final value = rawValue / 1000.0;
+            debugPrint('      Current (raw): $rawValue');
+            debugPrint('      Current: ${value}A');
+            extraSensorData['current_$channel'] = value;
+            break;
+
+          case _lppFrequency:
+            final value = _readUInt32BE(reader).toDouble();
+            debugPrint('      Frequency: ${value}Hz');
+            extraSensorData['frequency_$channel'] = value;
+            break;
+
+          case _lppPercentage:
+            final value = reader.readByte().toDouble();
+            debugPrint('      Percentage: $value%');
+            if (_isBatteryChannel(channel)) {
+              batteryPercentage = value;
+              extraSensorData[_sourceChannelKey('battery')] = channel;
+            } else {
+              extraSensorData['percentage_$channel'] = value;
+            }
+            break;
+
+          case _lppAltitude:
+            final rawValue = reader.readInt16BE();
+            final value = rawValue.toDouble();
+            debugPrint('      Altitude: ${value}m');
+            extraSensorData['altitude_$channel'] = value;
+            break;
+
+          case _lppConcentration:
+            final value = reader.readUInt16BE().toDouble();
+            debugPrint('      Concentration: ${value}ppm');
+            extraSensorData['concentration_$channel'] = value;
+            break;
+
+          case _lppPower:
+            final value = reader.readUInt16BE().toDouble();
+            debugPrint('      Power: ${value}W');
+            extraSensorData['power_$channel'] = value;
+            break;
+
+          case _lppSpeed:
+            final rawValue = reader.readUInt16BE();
+            final value = rawValue / 100.0;
+            debugPrint('      Speed: ${value}m/s');
+            extraSensorData['speed_$channel'] = value;
+            break;
+
+          case _lppDistance:
+            final rawValue = _readUInt32BE(reader);
+            final value = rawValue / 1000.0;
+            debugPrint('      Distance: ${value}m');
+            extraSensorData['distance_$channel'] = value;
+            break;
+
+          case _lppEnergy:
+            final rawValue = _readUInt32BE(reader);
+            final value = rawValue / 1000.0;
+            debugPrint('      Energy: ${value}kWh');
+            extraSensorData['energy_$channel'] = value;
+            break;
+
+          case _lppDirection:
+            final value = reader.readUInt16BE().toDouble();
+            debugPrint('      Direction: $value°');
+            extraSensorData['direction_$channel'] = value;
+            break;
+
+          case _lppUnixTime:
+            final value = _readUInt32BE(reader);
+            debugPrint('      Unix time: $value');
+            extraSensorData['unixtime_$channel'] = value;
+            break;
+
+          case _lppColour:
+            final red = reader.readByte();
+            final green = reader.readByte();
+            final blue = reader.readByte();
+            debugPrint('      Colour: r=$red, g=$green, b=$blue');
+            extraSensorData['colour_$channel'] = {
+              'r': red,
+              'g': green,
+              'b': blue,
+            };
+            break;
+
+          case _lppGust:
+            final rawValue = reader.readUInt16BE();
+            final value = rawValue / 100.0;
+            debugPrint('      Gust: ${value}m/s');
+            extraSensorData['gust_$channel'] = value;
+            break;
+
+          case _lppDewPoint:
+            final rawValue = reader.readInt16BE();
+            final value = rawValue / 10.0;
+            debugPrint('      Dew point: ${value.toStringAsFixed(1)}°C');
+            extraSensorData['dew_$channel'] = value;
+            break;
+
+          case _lppRain:
+            final rawValue = reader.readUInt16BE();
+            final value = rawValue / 10.0;
+            debugPrint('      Rain: ${value}mm');
+            extraSensorData['rain_$channel'] = value;
+            break;
+
+          case _lppBinaryBool:
+          case _lppBinaryPowerSwitch:
+          case _lppBinaryOpen:
+          case _lppBinaryBatteryLow:
+          case _lppBinaryCharging:
+          case _lppBinaryCarbonMonoxide:
+          case _lppBinaryCold:
+          case _lppBinaryConnectivity:
+          case _lppBinaryDoor:
+          case _lppBinaryGarageDoor:
+          case _lppBinaryGas:
+          case _lppBinaryHeat:
+          case _lppBinaryLight:
+          case _lppBinaryLock:
+          case _lppBinaryMoisture:
+          case _lppBinaryMotion:
+          case _lppBinaryMoving:
+          case _lppBinaryOccupancy:
+          case _lppBinaryPlug:
+          case _lppBinaryPresence:
+          case _lppBinaryProblem:
+          case _lppBinaryRunning:
+          case _lppBinarySafety:
+          case _lppBinarySmoke:
+          case _lppBinarySound:
+          case _lppBinaryTamper:
+          case _lppBinaryVibration:
+          case _lppBinaryWindow:
+            final value = reader.readByte();
+            debugPrint('      Binary state: $value');
+            extraSensorData['${_binaryMetricKeyForType(type)}_$channel'] =
+                value;
+            break;
+
+          case _lppButtonEvent:
+            final value = reader.readByte();
+            debugPrint('      Button event: $value');
+            extraSensorData['button_event_$channel'] = value;
+            break;
+
+          case _lppDimmer:
+            final value = _readInt8(reader);
+            debugPrint('      Dimmer: $value');
+            extraSensorData['dimmer_$channel'] = value;
+            break;
+
+          case _lppUv:
+            final value = reader.readByte() / 10.0;
+            debugPrint('      UV index: $value');
+            extraSensorData['uv_$channel'] = value;
+            break;
+
+          case _lppLightLevel:
+            final value = reader.readByte();
+            debugPrint('      Light level: $value');
+            extraSensorData['light_level_$channel'] = value;
+            break;
+
+          case _lppPm25:
+            final value = reader.readUInt16BE().toDouble();
+            debugPrint('      PM2.5: $value');
+            extraSensorData['pm25_$channel'] = value;
+            break;
+
+          case _lppPm10:
+            final value = reader.readUInt16BE().toDouble();
+            debugPrint('      PM10: $value');
+            extraSensorData['pm10_$channel'] = value;
+            break;
+
+          case _lppCo2:
+            final value = reader.readUInt16BE().toDouble();
+            debugPrint('      CO2: $value');
+            extraSensorData['co2_$channel'] = value;
+            break;
+
+          case _lppTvoc:
+            final value = reader.readUInt16BE().toDouble();
+            debugPrint('      TVOC: $value');
+            extraSensorData['tvoc_$channel'] = value;
+            break;
+
+          case _lppRpm:
+            final value = reader.readUInt16BE().toDouble();
+            debugPrint('      RPM: $value');
+            extraSensorData['rpm_$channel'] = value;
+            break;
+
+          case _lppConductivity:
+            final value = reader.readUInt16BE().toDouble();
+            debugPrint('      Conductivity: $value');
+            extraSensorData['conductivity_$channel'] = value;
+            break;
+
+          case _lppRotation:
+            final rawValue = reader.readInt16BE();
+            final value = rawValue / 10.0;
+            debugPrint('      Rotation: $value');
+            extraSensorData['rotation_$channel'] = value;
+            break;
+
+          case _lppDuration:
+            final rawValue = _readUInt32BE(reader);
+            final value = rawValue / 1000.0;
+            debugPrint('      Duration: $value s');
+            extraSensorData['duration_$channel'] = value;
+            break;
+
+          case _lppAcceleration:
+            final rawValue = _readInt32BE(reader);
+            final value = rawValue / 1000000.0;
+            debugPrint('      Acceleration: $value');
+            extraSensorData['acceleration_$channel'] = value;
+            break;
+
+          case _lppGyroRate:
+            final rawValue = _readInt32BE(reader);
+            final value = rawValue / 1000.0;
+            debugPrint('      Gyro rate: $value');
+            extraSensorData['gyro_rate_$channel'] = value;
+            break;
+
+          case _lppVolume:
+            final rawValue = _readUInt32BE(reader);
+            final value = rawValue / 1000.0;
+            debugPrint('      Volume: $value');
+            extraSensorData['volume_$channel'] = value;
+            break;
+
+          case _lppFlowRate:
+            final rawValue = _readUInt32BE(reader);
+            final value = rawValue / 1000.0;
+            debugPrint('      Flow rate: $value');
+            extraSensorData['flow_rate_$channel'] = value;
+            break;
+
+          case _lppVolumeStorage:
+            final rawValue = _readUInt32BE(reader);
+            final value = rawValue / 1000.0;
+            debugPrint('      Storage volume: $value');
+            extraSensorData['volume_storage_$channel'] = value;
+            break;
+
+          case _lppWater:
+            final rawValue = _readUInt32BE(reader);
+            final value = rawValue / 1000.0;
+            debugPrint('      Water: $value');
+            extraSensorData['water_$channel'] = value;
+            break;
+
+          case _lppGasVolume:
+            final rawValue = _readUInt32BE(reader);
+            final value = rawValue / 1000.0;
+            debugPrint('      Gas volume: $value');
+            extraSensorData['gas_volume_$channel'] = value;
+            break;
+
+          case _lppMass:
+            final rawValue = _readUInt32BE(reader);
+            final value = rawValue / 1000.0;
+            debugPrint('      Mass: $value');
+            extraSensorData['mass_$channel'] = value;
+            break;
+
+          case _lppSignedSpeed:
+            final rawValue = _readInt32BE(reader);
+            final value = rawValue / 1000000.0;
+            debugPrint('      Signed speed: $value');
+            extraSensorData['signed_speed_$channel'] = value;
+            break;
+
+          case _lppSignedPower:
+            final rawValue = _readInt32BE(reader);
+            final value = rawValue / 100.0;
+            debugPrint('      Signed power: $value');
+            extraSensorData['signed_power_$channel'] = value;
+            break;
+
+          case _lppSignedCurrent:
+            final rawValue = _readInt32BE(reader);
+            final value = rawValue / 1000.0;
+            debugPrint('      Signed current: $value');
+            extraSensorData['signed_current_$channel'] = value;
+            break;
+
+          case _lppSwitch:
+            final value = reader.readByte();
+            debugPrint('      Switch: $value');
+            extraSensorData['switch_$channel'] = value;
+            break;
+
           default:
-            debugPrint(
-              '      ⚠️ Unknown type, skipping remaining ${reader.remainingBytesCount} bytes',
-            );
-            // Unknown type, skip remaining to avoid parsing errors
-            reader.skip(reader.remainingBytesCount);
+            final size = _payloadSizeForType(type);
+            if (size == null || reader.remainingBytesCount < size) {
+              debugPrint(
+                '      ⚠️ Unknown type $type with unsupported size, stopping parse',
+              );
+              reader.skip(reader.remainingBytesCount);
+              break;
+            }
+            debugPrint('      ⚠️ Unknown type $type, skipping $size bytes');
+            reader.skip(size);
             break;
         }
       } catch (e) {
@@ -258,6 +677,163 @@ class CayenneLppParser {
     return ((voltage - 3.0) / 1.2) * 100.0;
   }
 
+  static bool _isBatteryChannel(int channel) =>
+      channel == 0 || channel == _selfTelemetryChannel;
+
+  static int _readUInt32BE(BufferReader reader) {
+    final bytes = reader.readBytes(4);
+    return (bytes[0] << 24) | (bytes[1] << 16) | (bytes[2] << 8) | bytes[3];
+  }
+
+  static int _readInt32BE(BufferReader reader) {
+    final value = _readUInt32BE(reader);
+    if ((value & 0x80000000) != 0) {
+      return value - 0x100000000;
+    }
+    return value;
+  }
+
+  static int _readInt8(BufferReader reader) {
+    final value = reader.readByte();
+    if ((value & 0x80) != 0) {
+      return value - 0x100;
+    }
+    return value;
+  }
+
+  static String _sourceChannelKey(String fieldKey) =>
+      '__source_channel:$fieldKey';
+
+  static String _binaryMetricKeyForType(int type) {
+    switch (type) {
+      case _lppBinaryBool:
+        return 'binary_bool';
+      case _lppBinaryPowerSwitch:
+        return 'binary_power_switch';
+      case _lppBinaryOpen:
+        return 'binary_open';
+      case _lppBinaryBatteryLow:
+        return 'binary_battery_low';
+      case _lppBinaryCharging:
+        return 'binary_charging';
+      case _lppBinaryCarbonMonoxide:
+        return 'binary_carbon_monoxide';
+      case _lppBinaryCold:
+        return 'binary_cold';
+      case _lppBinaryConnectivity:
+        return 'binary_connectivity';
+      case _lppBinaryDoor:
+        return 'binary_door';
+      case _lppBinaryGarageDoor:
+        return 'binary_garage_door';
+      case _lppBinaryGas:
+        return 'binary_gas';
+      case _lppBinaryHeat:
+        return 'binary_heat';
+      case _lppBinaryLight:
+        return 'binary_light';
+      case _lppBinaryLock:
+        return 'binary_lock';
+      case _lppBinaryMoisture:
+        return 'binary_moisture';
+      case _lppBinaryMotion:
+        return 'binary_motion';
+      case _lppBinaryMoving:
+        return 'binary_moving';
+      case _lppBinaryOccupancy:
+        return 'binary_occupancy';
+      case _lppBinaryPlug:
+        return 'binary_plug';
+      case _lppBinaryPresence:
+        return 'binary_presence';
+      case _lppBinaryProblem:
+        return 'binary_problem';
+      case _lppBinaryRunning:
+        return 'binary_running';
+      case _lppBinarySafety:
+        return 'binary_safety';
+      case _lppBinarySmoke:
+        return 'binary_smoke';
+      case _lppBinarySound:
+        return 'binary_sound';
+      case _lppBinaryTamper:
+        return 'binary_tamper';
+      case _lppBinaryVibration:
+        return 'binary_vibration';
+      case _lppBinaryWindow:
+        return 'binary_window';
+    }
+    return 'binary_state';
+  }
+
+  static int? _payloadSizeForType(int type) {
+    if (type >= _lppBinaryBool && type <= _lppBinaryWindow) {
+      return 1;
+    }
+    switch (type) {
+      case MeshCoreConstants.lppDigitalInput:
+      case MeshCoreConstants.lppDigitalOutput:
+      case MeshCoreConstants.lppPresenceSensor:
+      case MeshCoreConstants.lppHumiditySensor:
+      case _lppPercentage:
+      case _lppSwitch:
+      case _lppButtonEvent:
+      case _lppDimmer:
+      case _lppUv:
+      case _lppLightLevel:
+        return 1;
+      case MeshCoreConstants.lppAnalogInput:
+      case MeshCoreConstants.lppAnalogOutput:
+      case MeshCoreConstants.lppIlluminanceSensor:
+      case MeshCoreConstants.lppTemperatureSensor:
+      case MeshCoreConstants.lppBarometer:
+      case MeshCoreConstants.lppVoltageSensor:
+      case _lppCurrent:
+      case _lppAltitude:
+      case _lppConcentration:
+      case _lppPower:
+      case _lppSpeed:
+      case _lppDirection:
+      case _lppGust:
+      case _lppDewPoint:
+      case _lppRain:
+      case _lppPm25:
+      case _lppPm10:
+      case _lppCo2:
+      case _lppTvoc:
+      case _lppRpm:
+      case _lppConductivity:
+      case _lppRotation:
+        return 2;
+      case MeshCoreConstants.lppAccelerometer:
+      case MeshCoreConstants.lppGyrometer:
+        return 6;
+      case MeshCoreConstants.lppGps:
+        return 9;
+      case _lppGenericSensor:
+      case _lppFrequency:
+      case _lppDistance:
+      case _lppEnergy:
+      case _lppUnixTime:
+      case _lppDuration:
+      case _lppAcceleration:
+      case _lppGyroRate:
+      case _lppVolume:
+      case _lppFlowRate:
+      case _lppVolumeStorage:
+      case _lppWater:
+      case _lppGasVolume:
+      case _lppMass:
+      case _lppSignedSpeed:
+      case _lppSignedPower:
+      case _lppSignedCurrent:
+        return 4;
+      case _lppColour:
+        return 3;
+    }
+    return null;
+  }
+
   static bool _isZeroPaddedTail(Uint8List data, int remainingBytes) {
     final start = data.length - remainingBytes;
     for (int i = start; i < data.length; i++) {

lib/services/contact_route_resolver.dart

@@ -0,0 +1,336 @@
+import 'dart:math' as math;
+
+import 'package:latlong2/latlong.dart';
+
+import '../models/contact.dart';
+
+class ResolvedContactRoutePlan {
+  final List<String> tokens;
+  final List<Contact> selectedContacts;
+  final String summary;
+
+  const ResolvedContactRoutePlan({
+    required this.tokens,
+    required this.selectedContacts,
+    required this.summary,
+  });
+
+  String get canonicalText => tokens.join(',');
+}
+
+class ContactRouteResolver {
+  static const Distance _distance = Distance();
+
+  const ContactRouteResolver._();
+
+  static ResolvedContactRoutePlan? resolveAutomaticRoute({
+    required LatLng senderLocation,
+    required Contact recipient,
+    required List<Contact> availableContacts,
+    required int hashSize,
+  }) {
+    final recipientLocation = recipient.displayLocation;
+    if (recipientLocation == null) return null;
+
+    final repeaters = availableContacts
+        .where(
+          (contact) =>
+              contact.isRepeater &&
+              contact.displayLocation != null &&
+              contact.publicKeyHex != recipient.publicKeyHex,
+        )
+        .toList();
+    if (repeaters.isEmpty) return null;
+
+    final recipientLatLng = LatLng(
+      recipientLocation.latitude,
+      recipientLocation.longitude,
+    );
+
+    final routedCandidates =
+        repeaters
+            .where(
+              (contact) =>
+                  contact.routeHasPath && contact.routeHashSize == hashSize,
+            )
+            .toList()
+          ..sort(
+            (a, b) =>
+                _scoreKnownRouteRepeater(
+                  senderLocation: senderLocation,
+                  recipientLocation: recipientLatLng,
+                  repeater: a,
+                  availableContacts: repeaters,
+                  hashSize: hashSize,
+                ).compareTo(
+                  _scoreKnownRouteRepeater(
+                    senderLocation: senderLocation,
+                    recipientLocation: recipientLatLng,
+                    repeater: b,
+                    availableContacts: repeaters,
+                    hashSize: hashSize,
+                  ),
+                ),
+          );
+
+    if (routedCandidates.isNotEmpty) {
+      final anchor = routedCandidates.first;
+      final tokens = <String>[
+        ...anchor.routeCanonicalText
+            .split(',')
+            .where((token) => token.isNotEmpty)
+            .map((token) => token.toUpperCase()),
+        _tokenFor(anchor, hashSize),
+      ];
+      final selectedContacts = _matchContactsForTokens(
+        tokens,
+        availableContacts: repeaters,
+      );
+      return ResolvedContactRoutePlan(
+        tokens: _dedupeTokens(tokens),
+        selectedContacts: selectedContacts,
+        summary: 'Resolved via known repeater route',
+      );
+    }
+
+    final corridorRepeaters = List<Contact>.from(repeaters)
+      ..sort((a, b) {
+        final progressA = _progressAlongSegment(
+          point: LatLng(
+            a.displayLocation!.latitude,
+            a.displayLocation!.longitude,
+          ),
+          start: senderLocation,
+          end: recipientLatLng,
+        );
+        final progressB = _progressAlongSegment(
+          point: LatLng(
+            b.displayLocation!.latitude,
+            b.displayLocation!.longitude,
+          ),
+          start: senderLocation,
+          end: recipientLatLng,
+        );
+        final progressCompare = progressA.compareTo(progressB);
+        if (progressCompare != 0) return progressCompare;
+        return _scoreRepeater(
+          senderLocation: senderLocation,
+          recipientLocation: recipientLatLng,
+          repeater: a,
+        ).compareTo(
+          _scoreRepeater(
+            senderLocation: senderLocation,
+            recipientLocation: recipientLatLng,
+            repeater: b,
+          ),
+        );
+      });
+
+    final selected = <Contact>[];
+    var currentPoint = senderLocation;
+    var currentDistanceToRecipient = _distance.as(
+      LengthUnit.Meter,
+      senderLocation,
+      recipientLatLng,
+    );
+    final maxCorridorDistance = math.max(
+      1500.0,
+      currentDistanceToRecipient * 0.22,
+    );
+
+    for (final repeater in corridorRepeaters) {
+      if (selected.length >= 4) break;
+      final repeaterPoint = LatLng(
+        repeater.displayLocation!.latitude,
+        repeater.displayLocation!.longitude,
+      );
+      final distanceToSegment = _distanceToSegmentMeters(
+        repeaterPoint,
+        senderLocation,
+        recipientLatLng,
+      );
+      if (distanceToSegment > maxCorridorDistance) {
+        continue;
+      }
+
+      final nextDistanceToRecipient = _distance.as(
+        LengthUnit.Meter,
+        repeaterPoint,
+        recipientLatLng,
+      );
+      if (nextDistanceToRecipient >= currentDistanceToRecipient - 300) {
+        continue;
+      }
+
+      final distanceFromCurrent = _distance.as(
+        LengthUnit.Meter,
+        currentPoint,
+        repeaterPoint,
+      );
+      if (distanceFromCurrent < 100) {
+        continue;
+      }
+
+      selected.add(repeater);
+      currentPoint = repeaterPoint;
+      currentDistanceToRecipient = nextDistanceToRecipient;
+
+      if (currentDistanceToRecipient < 2500) {
+        break;
+      }
+    }
+
+    if (selected.isEmpty) {
+      return null;
+    }
+
+    return ResolvedContactRoutePlan(
+      tokens: selected.map((contact) => _tokenFor(contact, hashSize)).toList(),
+      selectedContacts: selected,
+      summary: 'Resolved from repeater locations',
+    );
+  }
+
+  static List<Contact> _matchContactsForTokens(
+    List<String> tokens, {
+    required List<Contact> availableContacts,
+  }) {
+    final matches = <Contact>[];
+    final seen = <String>{};
+    for (final token in tokens) {
+      final match = availableContacts
+          .where(
+            (contact) => contact.publicKeyHex.toUpperCase().startsWith(token),
+          )
+          .firstOrNull;
+      if (match != null && seen.add(match.publicKeyHex)) {
+        matches.add(match);
+      }
+    }
+    return matches;
+  }
+
+  static List<String> _dedupeTokens(List<String> tokens) {
+    final result = <String>[];
+    for (final token in tokens) {
+      if (result.isEmpty || result.last != token) {
+        result.add(token);
+      }
+    }
+    return result;
+  }
+
+  static String _tokenFor(Contact contact, int hashSize) {
+    final hex = contact.publicKeyHex.toUpperCase();
+    final length = hashSize * 2;
+    return hex.length < length ? hex : hex.substring(0, length);
+  }
+
+  static double _scoreRepeater({
+    required LatLng senderLocation,
+    required LatLng recipientLocation,
+    required Contact repeater,
+  }) {
+    final point = LatLng(
+      repeater.displayLocation!.latitude,
+      repeater.displayLocation!.longitude,
+    );
+    final toRecipient = _distance.as(
+      LengthUnit.Meter,
+      point,
+      recipientLocation,
+    );
+    final corridor = _distanceToSegmentMeters(
+      point,
+      senderLocation,
+      recipientLocation,
+    );
+    return (toRecipient * 0.75) + (corridor * 0.25);
+  }
+
+  static double _scoreKnownRouteRepeater({
+    required LatLng senderLocation,
+    required LatLng recipientLocation,
+    required Contact repeater,
+    required List<Contact> availableContacts,
+    required int hashSize,
+  }) {
+    final baseScore = _scoreRepeater(
+      senderLocation: senderLocation,
+      recipientLocation: recipientLocation,
+      repeater: repeater,
+    );
+    final repeaterPoint = LatLng(
+      repeater.displayLocation!.latitude,
+      repeater.displayLocation!.longitude,
+    );
+
+    final chainContacts = repeater.routeCanonicalText
+        .split(',')
+        .where((token) => token.isNotEmpty)
+        .map(
+          (token) => availableContacts
+              .where(
+                (contact) =>
+                    contact.displayLocation != null &&
+                    contact.publicKeyHex.toUpperCase().startsWith(
+                      token.toUpperCase(),
+                    ),
+              )
+              .firstOrNull,
+        )
+        .whereType<Contact>()
+        .toList();
+
+    final chainEnd = chainContacts.isNotEmpty
+        ? LatLng(
+            chainContacts.last.displayLocation!.latitude,
+            chainContacts.last.displayLocation!.longitude,
+          )
+        : senderLocation;
+    final chainGap = _distance.as(LengthUnit.Meter, chainEnd, repeaterPoint);
+    final senderGap = _distance.as(
+      LengthUnit.Meter,
+      senderLocation,
+      repeaterPoint,
+    );
+
+    return (chainGap * 0.55) + (baseScore * 0.35) + (senderGap * 0.10);
+  }
+
+  static double _progressAlongSegment({
+    required LatLng point,
+    required LatLng start,
+    required LatLng end,
+  }) {
+    final dx = end.longitude - start.longitude;
+    final dy = end.latitude - start.latitude;
+    final lengthSquared = (dx * dx) + (dy * dy);
+    if (lengthSquared == 0) return 0;
+    return (((point.longitude - start.longitude) * dx) +
+            ((point.latitude - start.latitude) * dy)) /
+        lengthSquared;
+  }
+
+  static double _distanceToSegmentMeters(LatLng p, LatLng a, LatLng b) {
+    final ax = a.longitude;
+    final ay = a.latitude;
+    final bx = b.longitude;
+    final by = b.latitude;
+    final px = p.longitude;
+    final py = p.latitude;
+
+    final abx = bx - ax;
+    final aby = by - ay;
+    final apx = px - ax;
+    final apy = py - ay;
+    final ab2 = abx * abx + aby * aby;
+    if (ab2 == 0) {
+      return _distance.as(LengthUnit.Meter, a, p);
+    }
+    var t = (apx * abx + apy * aby) / ab2;
+    t = t.clamp(0.0, 1.0);
+    final closest = LatLng(ay + aby * t, ax + abx * t);
+    return _distance.as(LengthUnit.Meter, closest, p);
+  }
+}

lib/services/contact_storage_service.dart

@@ -2,13 +2,17 @@ import 'dart:convert';
 import 'package:flutter/foundation.dart';
 import 'package:shared_preferences/shared_preferences.dart';
 import '../models/contact.dart';
+import '../models/contact_group.dart';
 import '../utils/key_comparison.dart';
 import 'package:latlong2/latlong.dart';
 
 /// Service for persisting contacts to local storage
 class ContactStorageService {
   static const String _contactsKey = 'stored_contacts';
+  static const String _contactGroupsKey = 'stored_contact_groups';
+  static const String _pendingAdvertsKey = 'stored_pending_adverts';
   static const int _maxStoredContacts = 500; // Store up to 500 contacts
+  static const int _maxStoredPendingAdverts = 500;
 
   /// Save contacts to persistent storage
   Future<void> saveContacts(List<Contact> contacts) async {
@@ -90,6 +94,81 @@ class ContactStorageService {
     }
   }
 
+  Future<void> saveContactGroups(List<SavedContactGroup> groups) async {
+    try {
+      final prefs = await SharedPreferences.getInstance();
+      final jsonString = jsonEncode(
+        groups.map((group) => _contactGroupToJson(group)).toList(),
+      );
+      await prefs.setString(_contactGroupsKey, jsonString);
+      debugPrint(
+        '✅ [ContactStorage] Saved ${groups.length} contact groups to storage',
+      );
+    } catch (e) {
+      debugPrint('❌ [ContactStorage] Error saving contact groups: $e');
+    }
+  }
+
+  Future<List<SavedContactGroup>> loadContactGroups() async {
+    try {
+      final prefs = await SharedPreferences.getInstance();
+      final jsonString = prefs.getString(_contactGroupsKey);
+      if (jsonString == null || jsonString.isEmpty) {
+        return [];
+      }
+
+      final jsonList = jsonDecode(jsonString) as List<dynamic>;
+      return jsonList
+          .map((json) => _contactGroupFromJson(json as Map<String, dynamic>))
+          .whereType<SavedContactGroup>()
+          .toList();
+    } catch (e) {
+      debugPrint('❌ [ContactStorage] Error loading contact groups: $e');
+      return [];
+    }
+  }
+
+  Future<void> savePendingAdverts(List<Map<String, dynamic>> adverts) async {
+    try {
+      final prefs = await SharedPreferences.getInstance();
+      final limitedList = adverts.length > _maxStoredPendingAdverts
+          ? adverts.sublist(adverts.length - _maxStoredPendingAdverts)
+          : adverts;
+      await prefs.setString(_pendingAdvertsKey, jsonEncode(limitedList));
+      debugPrint(
+        '✅ [ContactStorage] Saved ${limitedList.length} pending adverts to storage',
+      );
+    } catch (e) {
+      debugPrint('❌ [ContactStorage] Error saving pending adverts: $e');
+    }
+  }
+
+  Future<List<Map<String, dynamic>>> loadPendingAdverts() async {
+    try {
+      final prefs = await SharedPreferences.getInstance();
+      final jsonString = prefs.getString(_pendingAdvertsKey);
+      if (jsonString == null || jsonString.isEmpty) {
+        return const [];
+      }
+
+      final jsonList = jsonDecode(jsonString) as List<dynamic>;
+      return jsonList.whereType<Map<String, dynamic>>().toList();
+    } catch (e) {
+      debugPrint('❌ [ContactStorage] Error loading pending adverts: $e');
+      return const [];
+    }
+  }
+
+  Future<void> clearPendingAdverts() async {
+    try {
+      final prefs = await SharedPreferences.getInstance();
+      await prefs.remove(_pendingAdvertsKey);
+      debugPrint('✅ [ContactStorage] Cleared all stored pending adverts');
+    } catch (e) {
+      debugPrint('❌ [ContactStorage] Error clearing pending adverts: $e');
+    }
+  }
+
   /// Get storage statistics
   Future<Map<String, dynamic>> getStorageStats() async {
     try {
@@ -123,6 +202,7 @@ class ContactStorageService {
       'outPathLen': contact.outPathLen,
       'outPath': base64Encode(contact.outPath),
       'advName': contact.advName,
+      'nameOverride': contact.nameOverride,
       'lastAdvert': contact.lastAdvert,
       'advLat': contact.advLat,
       'advLon': contact.advLon,
@@ -130,6 +210,15 @@ class ContactStorageService {
       'telemetry': contact.telemetry != null
           ? _telemetryToJson(contact.telemetry!)
           : null,
+      'advertHistory': contact.advertHistory
+          .map(
+            (point) => {
+              'lat': point.location.latitude,
+              'lon': point.location.longitude,
+              'tsMillis': point.timestamp.millisecondsSinceEpoch,
+            },
+          )
+          .toList(),
     };
   }
 
@@ -145,6 +234,7 @@ class ContactStorageService {
         outPathLen: json['outPathLen'] as int,
         outPath: Uint8List.fromList(base64Decode(json['outPath'] as String)),
         advName: json['advName'] as String,
+        nameOverride: json['nameOverride'] as String?,
         lastAdvert: json['lastAdvert'] as int,
         advLat: json['advLat'] as int,
         advLon: json['advLon'] as int,
@@ -152,6 +242,7 @@ class ContactStorageService {
         telemetry: json['telemetry'] != null
             ? _telemetryFromJson(json['telemetry'] as Map<String, dynamic>)
             : null,
+        advertHistory: _advertHistoryFromJson(json['advertHistory']),
       );
     } catch (e) {
       debugPrint('❌ [ContactStorage] Error parsing contact from JSON: $e');
@@ -203,4 +294,56 @@ class ContactStorageService {
       return null;
     }
   }
+
+  List<AdvertLocation> _advertHistoryFromJson(dynamic json) {
+    if (json is! List) return [];
+    final result = <AdvertLocation>[];
+    for (final item in json) {
+      if (item is! Map<String, dynamic>) continue;
+      final lat = item['lat'];
+      final lon = item['lon'];
+      final tsMillis = item['tsMillis'];
+      if (lat is! num || lon is! num || tsMillis is! int) continue;
+      result.add(
+        AdvertLocation(
+          location: LatLng(lat.toDouble(), lon.toDouble()),
+          timestamp: DateTime.fromMillisecondsSinceEpoch(tsMillis),
+        ),
+      );
+    }
+    return result;
+  }
+
+  Map<String, dynamic> _contactGroupToJson(SavedContactGroup group) {
+    return {
+      'id': group.id,
+      'sectionKey': group.sectionKey,
+      'label': group.label,
+      'query': group.query,
+      'createdAtMillis': group.createdAt.millisecondsSinceEpoch,
+      'matchPrefixes': group.matchPrefixes,
+      'isAutoGroup': group.isAutoGroup,
+    };
+  }
+
+  SavedContactGroup? _contactGroupFromJson(Map<String, dynamic> json) {
+    try {
+      return SavedContactGroup(
+        id: json['id'] as String,
+        sectionKey: json['sectionKey'] as String,
+        label: json['label'] as String,
+        query: json['query'] as String,
+        createdAt: DateTime.fromMillisecondsSinceEpoch(
+          json['createdAtMillis'] as int,
+        ),
+        matchPrefixes: (json['matchPrefixes'] as List<dynamic>?)
+            ?.map((value) => value as String)
+            .toList(),
+        isAutoGroup: json['isAutoGroup'] as bool? ?? false,
+      );
+    } catch (e) {
+      debugPrint('❌ [ContactStorage] Error parsing contact group: $e');
+      return null;
+    }
+  }
 }

lib/services/live_traffic_summary.dart

@@ -0,0 +1,247 @@
+import '../models/ble_packet_log.dart';
+import '../utils/log_rx_route_decoder.dart';
+
+enum LiveTrafficBusyness { quiet, active, busy }
+
+class LiveTrafficEntry {
+  final BlePacketLog log;
+  final DecodedLogRxRoute? route;
+
+  const LiveTrafficEntry({required this.log, required this.route});
+
+  bool get isMultiHop => (route?.hopCount ?? 0) > 1;
+
+  int? get hopCount => route?.hopCount;
+
+  String get payloadLabel {
+    final decodedRoute = route;
+    if (decodedRoute == null) {
+      return log.responseCode != null ? log.opcodeName : 'Unknown';
+    }
+    return payloadTypeLabel(decodedRoute.payloadType);
+  }
+
+  String? get payloadMeaning {
+    final decodedRoute = route;
+    if (decodedRoute == null) return null;
+    return payloadTypeMeaning(decodedRoute.payloadType);
+  }
+
+  String get routePreview {
+    final decodedRoute = route;
+    if (decodedRoute == null || decodedRoute.hopHashes.isEmpty) {
+      return 'Direct packet';
+    }
+    return decodedRoute.hopHashes
+        .map((hashHex) => '0x${hashHex.toUpperCase()}')
+        .join(' -> ');
+  }
+
+  static String payloadTypeLabel(int payloadType) {
+    switch (payloadType) {
+      case 0x00:
+        return 'Request';
+      case 0x01:
+        return 'Response';
+      case 0x02:
+        return 'Text message';
+      case 0x03:
+        return 'Ack';
+      case 0x04:
+        return 'Advertisement';
+      case 0x05:
+        return 'Group text';
+      case 0x06:
+        return 'Group datagram';
+      case 0x07:
+        return 'Anonymous request';
+      case 0x08:
+        return 'Returned path';
+      case 0x09:
+        return 'Trace path';
+      case 0x0A:
+        return 'Multipart packet';
+      case 0x0B:
+        return 'Control packet';
+      default:
+        return '0x${payloadType.toRadixString(16).padLeft(2, '0')}';
+    }
+  }
+
+  static String payloadTypeMeaning(int payloadType) {
+    switch (payloadType) {
+      case 0x00:
+        return 'Request (destination/source hashes + MAC)';
+      case 0x01:
+        return 'Response to Request or Anonymous request';
+      case 0x02:
+        return 'Plain text message';
+      case 0x03:
+        return 'Simple acknowledgement';
+      case 0x04:
+        return 'Node advertisement';
+      case 0x05:
+        return 'Unverified group text message';
+      case 0x06:
+        return 'Unverified group datagram';
+      case 0x07:
+        return 'Generic anonymous request';
+      case 0x08:
+        return 'Returned path payload';
+      case 0x09:
+        return 'Trace path collecting hop SNR';
+      case 0x0A:
+        return 'One packet from a multipart set';
+      case 0x0B:
+        return 'Control or discovery packet';
+      default:
+        return 'protocol payload';
+    }
+  }
+}
+
+class LiveTrafficSnapshot {
+  final DateTime windowStart;
+  final Duration windowDuration;
+  final int packetsPerMinute;
+  final int rxCount;
+  final int txCount;
+  final int totalCount;
+  final double? avgSnrDb;
+  final double? latestSnrDb;
+  final double? avgRssiDbm;
+  final int? latestRssiDbm;
+  final int multiHopCount;
+  final double? avgHopCount;
+  final List<LiveTrafficEntry> visibleEntries;
+  final LiveTrafficBusyness busyness;
+
+  const LiveTrafficSnapshot({
+    required this.windowStart,
+    required this.windowDuration,
+    required this.packetsPerMinute,
+    required this.rxCount,
+    required this.txCount,
+    required this.totalCount,
+    required this.avgSnrDb,
+    required this.latestSnrDb,
+    required this.avgRssiDbm,
+    required this.latestRssiDbm,
+    required this.multiHopCount,
+    required this.avgHopCount,
+    required this.visibleEntries,
+    required this.busyness,
+  });
+}
+
+class LiveTrafficSummary {
+  static const Duration rollingWindow = Duration(seconds: 60);
+  static const int maxVisibleEntries = 120;
+  static const int logRxDataResponseCode = 0x88;
+
+  const LiveTrafficSummary._();
+
+  static LiveTrafficSnapshot fromLogs(
+    Iterable<BlePacketLog> logs, {
+    required DateTime now,
+    DateTime? clearedAt,
+    int? preferredHashSize,
+    Duration window = rollingWindow,
+    String? packetTypeFilter,
+  }) {
+    final windowStart = now.subtract(window);
+    final effectiveStart = clearedAt != null && clearedAt.isAfter(windowStart)
+        ? clearedAt
+        : windowStart;
+
+    final recentLogs = logs
+        .where(
+          (log) =>
+              log.direction == PacketDirection.rx &&
+              log.responseCode == logRxDataResponseCode &&
+              !log.timestamp.isBefore(effectiveStart),
+        )
+        .toList()
+      ..sort((a, b) => a.timestamp.compareTo(b.timestamp));
+
+    final entries = <LiveTrafficEntry>[];
+    for (final log in recentLogs) {
+      final route = LogRxRouteDecoder.decode(
+        log.rawData,
+        preferredHashSize: preferredHashSize,
+      );
+      entries.add(LiveTrafficEntry(log: log, route: route));
+    }
+
+    final filteredEntries = packetTypeFilter == null
+        ? entries
+        : entries
+              .where((entry) => entry.payloadLabel == packetTypeFilter)
+              .toList();
+
+    var rxCount = 0;
+    var snrCount = 0;
+    var snrSum = 0.0;
+    var rssiCount = 0;
+    var rssiSum = 0.0;
+    double? latestSnrDb;
+    int? latestRssiDbm;
+    var multiHopCount = 0;
+    var hopCountTotal = 0;
+    var hopCountSamples = 0;
+
+    for (final entry in filteredEntries) {
+      rxCount += 1;
+
+      final rxInfo = entry.log.logRxDataInfo;
+      if (rxInfo?.snrDb != null) {
+        snrCount += 1;
+        snrSum += rxInfo!.snrDb!;
+        latestSnrDb = rxInfo.snrDb!;
+      }
+      if (rxInfo?.rssiDbm != null) {
+        rssiCount += 1;
+        rssiSum += rxInfo!.rssiDbm!.toDouble();
+        latestRssiDbm = rxInfo.rssiDbm!;
+      }
+
+      final route = entry.route;
+      if (route != null && route.hopCount > 0) {
+        hopCountSamples += 1;
+        hopCountTotal += route.hopCount;
+        if (route.hopCount > 1) {
+          multiHopCount += 1;
+        }
+      }
+    }
+
+    final visibleEntries = filteredEntries.reversed.take(maxVisibleEntries).toList();
+    const txCount = 0;
+    final totalCount = rxCount;
+    final packetsPerMinute =
+        ((totalCount * Duration.secondsPerMinute) / window.inSeconds).round();
+
+    return LiveTrafficSnapshot(
+      windowStart: effectiveStart,
+      windowDuration: window,
+      packetsPerMinute: packetsPerMinute,
+      rxCount: rxCount,
+      txCount: txCount,
+      totalCount: totalCount,
+      avgSnrDb: snrCount == 0 ? null : snrSum / snrCount,
+      latestSnrDb: latestSnrDb,
+      avgRssiDbm: rssiCount == 0 ? null : rssiSum / rssiCount,
+      latestRssiDbm: latestRssiDbm,
+      multiHopCount: multiHopCount,
+      avgHopCount: hopCountSamples == 0 ? null : hopCountTotal / hopCountSamples,
+      visibleEntries: visibleEntries,
+      busyness: _busynessForPacketsPerMinute(packetsPerMinute),
+    );
+  }
+
+  static LiveTrafficBusyness _busynessForPacketsPerMinute(int ppm) {
+    if (ppm <= 5) return LiveTrafficBusyness.quiet;
+    if (ppm <= 20) return LiveTrafficBusyness.active;
+    return LiveTrafficBusyness.busy;
+  }
+}

lib/services/map_marker_service.dart

@@ -42,89 +42,100 @@ class MapMarkerService {
     double mapRotation = 0,
     Position? userPosition,
   }) {
-    return contacts.map((contact) {
-      final location = contact.displayLocation;
-      if (location == null) return null;
+    return contacts
+        .map((contact) {
+          final location = contact.displayLocation;
+          if (location == null) return null;
 
-      return Marker(
-        point: location,
-        width: 80,
-        height: 100,
-        rotate: false, // Don't rotate the entire marker with map
-        child: Transform.rotate(
-          angle: -mapRotation * pi / 180,
-          child: GestureDetector(
-            onTap: onTap != null ? () => onTap(contact) : null,
-            child: Column(
-              mainAxisSize: MainAxisSize.min,
-              children: [
-                // Location update time indicator
-                Container(
-                  padding: const EdgeInsets.symmetric(horizontal: 4, vertical: 1),
-                  decoration: BoxDecoration(
-                    color: getLocationAgeColor(contact),
-                    borderRadius: BorderRadius.circular(3),
-                  ),
-                  child: Text(
-                    contact.timeSinceLocationUpdate,
-                    style: const TextStyle(
-                      color: Colors.white,
-                      fontSize: 9,
-                      fontWeight: FontWeight.bold,
-                    ),
-                  ),
-                ),
-                const SizedBox(height: 2),
-                // Marker icon
-                Container(
-                  decoration: BoxDecoration(
-                    color: Colors.white,
-                    shape: contact.type == ContactType.channel ||
-                            contact.type == ContactType.room
-                        ? BoxShape.rectangle
-                        : BoxShape.circle,
-                    borderRadius: contact.type == ContactType.channel ||
-                            contact.type == ContactType.room
-                        ? BorderRadius.circular(14)
-                        : null,
-                    boxShadow: [
-                      BoxShadow(
-                        color: Colors.black.withValues(alpha: 0.3),
-                        blurRadius: 4,
-                        offset: const Offset(0, 2),
+          return Marker(
+            point: location,
+            width: 80,
+            height: 100,
+            rotate: false, // Don't rotate the entire marker with map
+            child: Transform.rotate(
+              angle: -mapRotation * pi / 180,
+              child: GestureDetector(
+                onTap: onTap != null ? () => onTap(contact) : null,
+                child: Column(
+                  mainAxisSize: MainAxisSize.min,
+                  children: [
+                    // Location update time indicator
+                    Container(
+                      padding: const EdgeInsets.symmetric(
+                        horizontal: 4,
+                        vertical: 1,
+                      ),
+                      decoration: BoxDecoration(
+                        color: getLocationAgeColor(contact),
+                        borderRadius: BorderRadius.circular(3),
+                      ),
+                      child: Text(
+                        contact.timeSinceLocationUpdate,
+                        style: const TextStyle(
+                          color: Colors.white,
+                          fontSize: 9,
+                          fontWeight: FontWeight.bold,
+                        ),
                       ),
-                    ],
-                  ),
-                  padding: const EdgeInsets.all(2),
-                  child: ContactAvatar(contact: contact, radius: 16),
-                ),
-                const SizedBox(height: 2),
-                // Name label (without emoji)
-                Container(
-                  constraints: const BoxConstraints(maxWidth: 80),
-                  padding: const EdgeInsets.symmetric(horizontal: 4, vertical: 1),
-                  decoration: BoxDecoration(
-                    color: Colors.black.withValues(alpha: 0.7),
-                    borderRadius: BorderRadius.circular(3),
-                  ),
-                  child: Text(
-                    contact.displayName,
-                    style: const TextStyle(
-                      color: Colors.white,
-                      fontSize: 9,
-                      fontWeight: FontWeight.bold,
                     ),
-                    overflow: TextOverflow.ellipsis,
-                    maxLines: 1,
-                    textAlign: TextAlign.center,
-                  ),
+                    const SizedBox(height: 2),
+                    // Marker icon
+                    Container(
+                      decoration: BoxDecoration(
+                        color: Colors.white,
+                        shape:
+                            contact.type == ContactType.channel ||
+                                contact.type == ContactType.room
+                            ? BoxShape.rectangle
+                            : BoxShape.circle,
+                        borderRadius:
+                            contact.type == ContactType.channel ||
+                                contact.type == ContactType.room
+                            ? BorderRadius.circular(14)
+                            : null,
+                        boxShadow: [
+                          BoxShadow(
+                            color: Colors.black.withValues(alpha: 0.3),
+                            blurRadius: 4,
+                            offset: const Offset(0, 2),
+                          ),
+                        ],
+                      ),
+                      padding: const EdgeInsets.all(2),
+                      child: ContactAvatar(contact: contact, radius: 16),
+                    ),
+                    const SizedBox(height: 2),
+                    // Name label (without emoji)
+                    Container(
+                      constraints: const BoxConstraints(maxWidth: 80),
+                      padding: const EdgeInsets.symmetric(
+                        horizontal: 4,
+                        vertical: 1,
+                      ),
+                      decoration: BoxDecoration(
+                        color: Colors.black.withValues(alpha: 0.7),
+                        borderRadius: BorderRadius.circular(3),
+                      ),
+                      child: Text(
+                        contact.displayName,
+                        style: const TextStyle(
+                          color: Colors.white,
+                          fontSize: 9,
+                          fontWeight: FontWeight.bold,
+                        ),
+                        overflow: TextOverflow.ellipsis,
+                        maxLines: 1,
+                        textAlign: TextAlign.center,
+                      ),
+                    ),
+                  ],
                 ),
-              ],
+              ),
             ),
-          ),
-        ),
-      );
-    }).whereType<Marker>().toList();
+          );
+        })
+        .whereType<Marker>()
+        .toList();
   }
 
   /// Generate markers for SAR events.
@@ -157,7 +168,10 @@ class MapMarkerService {
               children: [
                 // Time ago label
                 Container(
-                  padding: const EdgeInsets.symmetric(horizontal: 4, vertical: 1),
+                  padding: const EdgeInsets.symmetric(
+                    horizontal: 4,
+                    vertical: 1,
+                  ),
                   decoration: BoxDecoration(
                     color: getSarMarkerColor(marker.type),
                     borderRadius: BorderRadius.circular(3),
@@ -188,7 +202,7 @@ class MapMarkerService {
                   ),
                   padding: const EdgeInsets.all(6),
                   child: Text(
-                    marker.emoji,  // Use custom emoji if available
+                    marker.emoji, // Use custom emoji if available
                     style: const TextStyle(fontSize: 18),
                   ),
                 ),
@@ -196,13 +210,17 @@ class MapMarkerService {
                 // Type label
                 Container(
                   constraints: const BoxConstraints(maxWidth: 90),
-                  padding: const EdgeInsets.symmetric(horizontal: 4, vertical: 1),
+                  padding: const EdgeInsets.symmetric(
+                    horizontal: 4,
+                    vertical: 1,
+                  ),
                   decoration: BoxDecoration(
                     color: Colors.black.withValues(alpha: 0.7),
                     borderRadius: BorderRadius.circular(3),
                   ),
                   child: Text(
-                    marker.displayName,  // Uses notes if available, otherwise type.displayName
+                    marker
+                        .displayName, // Uses notes if available, otherwise type.displayName
                     style: const TextStyle(
                       color: Colors.white,
                       fontSize: 9,
@@ -269,7 +287,8 @@ class MapMarkerService {
     final dLat = (lat2 - lat1) * pi / 180;
     final dLon = (lon2 - lon1) * pi / 180;
 
-    final a = sin(dLat / 2) * sin(dLat / 2) +
+    final a =
+        sin(dLat / 2) * sin(dLat / 2) +
         cos(lat1 * pi / 180) *
             cos(lat2 * pi / 180) *
             sin(dLon / 2) *
@@ -299,8 +318,8 @@ class MapMarkerService {
     final lat2Rad = lat2 * pi / 180;
 
     final y = sin(dLon) * cos(lat2Rad);
-    final x = cos(lat1Rad) * sin(lat2Rad) -
-        sin(lat1Rad) * cos(lat2Rad) * cos(dLon);
+    final x =
+        cos(lat1Rad) * sin(lat2Rad) - sin(lat1Rad) * cos(lat2Rad) * cos(dLon);
 
     final bearing = atan2(y, x) * 180 / pi;
     return (bearing + 360) % 360;
@@ -368,6 +387,8 @@ class MapMarkerService {
         return Colors.deepPurple; // Purple for repeaters
       case ContactType.room:
         return Colors.teal; // Teal for rooms
+      case ContactType.sensor:
+        return Colors.green; // Green for sensors
       case ContactType.channel:
         return Colors.orange; // Orange for channels
       case ContactType.none:
@@ -389,6 +410,8 @@ class MapMarkerService {
         return Icons.router; // Router icon for repeaters
       case ContactType.room:
         return Icons.forum; // Forum/chat icon for rooms
+      case ContactType.sensor:
+        return Icons.sensors; // Sensors icon for sensor nodes
       case ContactType.channel:
         return Icons.public; // Public icon for channels
       case ContactType.none:
@@ -466,7 +489,8 @@ class MapMarkerService {
     }
 
     if (allPoints.isEmpty) {
-      return defaultCenter ?? const LatLng(46.0569, 14.5058); // Ljubljana, Slovenia
+      return defaultCenter ??
+          const LatLng(46.0569, 14.5058); // Ljubljana, Slovenia
     }
 
     double lat = 0, lng = 0;

lib/services/message_storage_service.dart

@@ -11,6 +11,7 @@ import 'package:latlong2/latlong.dart';
 /// Service for persisting messages to local storage
 class MessageStorageService {
   static const String _messagesKey = 'stored_messages';
+  static const String _removedSarMarkerIdsKey = 'removed_sar_marker_ids';
   static const String _messageContactLocationsKey =
       'stored_message_contact_locations';
   static const String _messageReceptionDetailsKey =
@@ -19,6 +20,8 @@ class MessageStorageService {
       'stored_message_transfer_details';
   static const String _messageRouteMetadataKey =
       'stored_message_route_metadata';
+  static const String _embeddedReceptionDetailsKey = 'storedReceptionDetails';
+  static const String _legacyPathBytesKey = 'storedPathBytes';
   static const int _maxStoredMessages = 1000; // Store up to 1000 messages
 
   /// Save messages to persistent storage
@@ -32,8 +35,16 @@ class MessageStorageService {
     try {
       final prefs = await SharedPreferences.getInstance();
 
-      // Convert messages to JSON
-      final jsonList = messages.map((msg) => _messageToJson(msg)).toList();
+      // Convert messages to JSON and embed path bytes as a fallback so they
+      // survive restore even if the sidecar reception-details entry is absent.
+      final jsonList = messages
+          .map(
+            (msg) => _messageToJson(
+              msg,
+              receptionDetails: messageReceptionDetails[msg.id],
+            ),
+          )
+          .toList();
 
       // Limit to max stored messages (keep most recent)
       final limitedList = jsonList.length > _maxStoredMessages
@@ -129,24 +140,36 @@ class MessageStorageService {
     try {
       final prefs = await SharedPreferences.getInstance();
       final jsonString = prefs.getString(_messageReceptionDetailsKey);
-      if (jsonString == null || jsonString.isEmpty) {
-        return const {};
-      }
-
-      final decoded = jsonDecode(jsonString);
-      if (decoded is! Map<String, dynamic>) {
-        return const {};
-      }
-
       final result = <String, MessageReceptionDetails>{};
-      for (final entry in decoded.entries) {
-        final value = entry.value;
-        if (value is! Map<String, dynamic>) continue;
-        final snapshot = MessageReceptionDetails.fromJson(value);
-        if (snapshot != null) {
-          result[entry.key] = snapshot;
+      if (jsonString != null && jsonString.isNotEmpty) {
+        final decoded = jsonDecode(jsonString);
+        if (decoded is Map<String, dynamic>) {
+          for (final entry in decoded.entries) {
+            final value = entry.value;
+            if (value is! Map<String, dynamic>) continue;
+            final snapshot = MessageReceptionDetails.fromJson(value);
+            if (snapshot != null) {
+              result[entry.key] = snapshot;
+            }
+          }
         }
       }
+
+      final embeddedReceptionDetails = await _loadEmbeddedReceptionDetails();
+      embeddedReceptionDetails.forEach((messageId, snapshot) {
+        result.putIfAbsent(messageId, () => snapshot);
+      });
+
+      final fallbackPathBytes = await _loadLegacyPathBytesFromMessages();
+      fallbackPathBytes.forEach((messageId, pathBytes) {
+        result.putIfAbsent(
+          messageId,
+          () => MessageReceptionDetails(
+            capturedAt: DateTime.fromMillisecondsSinceEpoch(0),
+            pathBytes: pathBytes,
+          ),
+        );
+      });
       return result;
     } catch (e) {
       debugPrint('❌ [MessageStorage] Error loading reception details: $e');
@@ -247,12 +270,36 @@ class MessageStorageService {
       await prefs.remove(_messageReceptionDetailsKey);
       await prefs.remove(_messageTransferDetailsKey);
       await prefs.remove(_messageRouteMetadataKey);
+      await prefs.remove(_removedSarMarkerIdsKey);
       debugPrint('✅ [MessageStorage] Cleared all stored messages');
     } catch (e) {
       debugPrint('❌ [MessageStorage] Error clearing messages: $e');
     }
   }
 
+  Future<Set<String>> loadRemovedSarMarkerIds() async {
+    try {
+      final prefs = await SharedPreferences.getInstance();
+      final ids = prefs.getStringList(_removedSarMarkerIdsKey) ?? const [];
+      return ids.toSet();
+    } catch (e) {
+      debugPrint('❌ [MessageStorage] Error loading removed SAR marker IDs: $e');
+      return const <String>{};
+    }
+  }
+
+  Future<void> saveRemovedSarMarkerIds(Set<String> ids) async {
+    try {
+      final prefs = await SharedPreferences.getInstance();
+      await prefs.setStringList(_removedSarMarkerIdsKey, ids.toList()..sort());
+      debugPrint(
+        '✅ [MessageStorage] Saved ${ids.length} removed SAR marker IDs',
+      );
+    } catch (e) {
+      debugPrint('❌ [MessageStorage] Error saving removed SAR marker IDs: $e');
+    }
+  }
+
   /// Get storage statistics
   Future<Map<String, dynamic>> getStorageStats() async {
     try {
@@ -278,7 +325,12 @@ class MessageStorageService {
   }
 
   /// Convert Message to JSON
-  Map<String, dynamic> _messageToJson(Message message) {
+  Map<String, dynamic> _messageToJson(
+    Message message, {
+    MessageReceptionDetails? receptionDetails,
+  }) {
+    final persistedPathBytes =
+        message.pathBytes ?? _pathBytesFromSnapshot(receptionDetails);
     return {
       'id': message.id,
       'messageType': message.messageType.name,
@@ -287,6 +339,7 @@ class MessageStorageService {
           : null,
       'channelIdx': message.channelIdx,
       'pathLen': message.pathLen,
+      'pathBytes': persistedPathBytes?.toList(),
       'textType': message.textType.value,
       'senderTimestamp': message.senderTimestamp,
       'text': message.text,
@@ -338,9 +391,67 @@ class MessageStorageService {
             },
           )
           .toList(),
+      if (receptionDetails != null)
+        _embeddedReceptionDetailsKey: receptionDetails.toJson(),
+      if (receptionDetails?.pathBytes case final pathBytes?)
+        _legacyPathBytesKey: List<int>.from(pathBytes),
     };
   }
 
+  Future<Map<String, MessageReceptionDetails>>
+  _loadEmbeddedReceptionDetails() async {
+    final prefs = await SharedPreferences.getInstance();
+    final jsonString = prefs.getString(_messagesKey);
+    if (jsonString == null || jsonString.isEmpty) {
+      return const {};
+    }
+
+    final decoded = jsonDecode(jsonString);
+    if (decoded is! List) {
+      return const {};
+    }
+
+    final result = <String, MessageReceptionDetails>{};
+    for (final entry in decoded) {
+      if (entry is! Map<String, dynamic>) continue;
+      final messageId = entry['id'];
+      final embedded = entry[_embeddedReceptionDetailsKey];
+      if (messageId is! String || embedded is! Map<String, dynamic>) continue;
+      final snapshot = MessageReceptionDetails.fromJson(embedded);
+      if (snapshot == null) continue;
+      result[messageId] = snapshot;
+    }
+    return result;
+  }
+
+  Future<Map<String, List<int>>> _loadLegacyPathBytesFromMessages() async {
+    final prefs = await SharedPreferences.getInstance();
+    final jsonString = prefs.getString(_messagesKey);
+    if (jsonString == null || jsonString.isEmpty) {
+      return const {};
+    }
+
+    final decoded = jsonDecode(jsonString);
+    if (decoded is! List) {
+      return const {};
+    }
+
+    final result = <String, List<int>>{};
+    for (final entry in decoded) {
+      if (entry is! Map<String, dynamic>) continue;
+      final messageId = entry['id'];
+      final pathBytes = entry[_legacyPathBytesKey];
+      if (messageId is! String || pathBytes is! List) continue;
+      final normalized = pathBytes
+          .whereType<num>()
+          .map((b) => b.toInt())
+          .toList();
+      if (normalized.isEmpty) continue;
+      result[messageId] = normalized;
+    }
+    return result;
+  }
+
   /// Convert JSON to Message
   Message? _messageFromJson(Map<String, dynamic> json) {
     try {
@@ -357,6 +468,14 @@ class MessageStorageService {
             : null,
         channelIdx: json['channelIdx'] as int?,
         pathLen: json['pathLen'] as int,
+        pathBytes: json['pathBytes'] is List
+            ? Uint8List.fromList(
+                (json['pathBytes'] as List<dynamic>)
+                    .whereType<num>()
+                    .map((b) => b.toInt())
+                    .toList(),
+              )
+            : null,
         textType: MessageTextType.fromValue(json['textType'] as int),
         senderTimestamp: json['senderTimestamp'] as int,
         text: json['text'] as String,
@@ -454,4 +573,12 @@ class MessageStorageService {
       return null;
     }
   }
+
+  Uint8List? _pathBytesFromSnapshot(MessageReceptionDetails? receptionDetails) {
+    final pathBytes = receptionDetails?.pathBytes;
+    if (pathBytes == null || pathBytes.isEmpty) {
+      return null;
+    }
+    return Uint8List.fromList(pathBytes);
+  }
 }

lib/services/notification_service.dart

@@ -1,5 +1,6 @@
 import 'package:flutter/material.dart';
 import 'package:flutter_local_notifications/flutter_local_notifications.dart';
+import 'package:shared_preferences/shared_preferences.dart';
 import 'package:timezone/data/latest_all.dart' as tz;
 import '../models/sar_marker.dart';
 import '../l10n/app_localizations.dart';
@@ -13,14 +14,28 @@ class NotificationService {
 
   final FlutterLocalNotificationsPlugin _notificationsPlugin =
       FlutterLocalNotificationsPlugin();
+  static const String _prefMessagesEnabled = 'notifications_messages_enabled';
+  static const String _prefSarEnabled = 'notifications_sar_enabled';
+  static const String _prefDiscoveryEnabled = 'notifications_discovery_enabled';
+  static const String _prefUpdatesEnabled = 'notifications_updates_enabled';
+  static const String _prefMuteForeground = 'notifications_mute_foreground';
 
   bool _isInitialized = false;
   bool _permissionGranted = false;
+  bool _messageNotificationsEnabled = true;
+  bool _sarNotificationsEnabled = true;
+  bool _discoveryNotificationsEnabled = true;
+  bool _updateNotificationsEnabled = true;
+  bool _muteForegroundNotifications = true;
+  AppLifecycleState _lifecycleState = AppLifecycleState.resumed;
+  String? _launchPayload;
 
   // Notification IDs
   static const int _sarNotificationId = 1000;
   static const int _messageNotificationId = 2000;
   static const int _updateNotificationId = 3000;
+  static const int _batteryNotificationId = 4000;
+  static const int _discoveryNotificationId = 5000;
 
   // Notification channels
   static const String _urgentChannelId = 'sar_urgent';
@@ -38,12 +53,32 @@ class NotificationService {
   static const String _updateChannelDescription =
       'Notifications for available app updates';
 
+  static const String _batteryChannelId = 'battery_alerts';
+  static const String _batteryChannelName = 'Battery Alerts';
+  static const String _batteryChannelDescription =
+      'Notifications when a device or contact battery is low';
+
+  static const String _discoveryChannelId = 'discovery_alerts';
+  static const String _discoveryChannelName = 'Discovery Alerts';
+  static const String _discoveryChannelDescription =
+      'Notifications when new contacts are discovered';
+
+  bool get messageNotificationsEnabled => _messageNotificationsEnabled;
+  bool get sarNotificationsEnabled => _sarNotificationsEnabled;
+  bool get discoveryNotificationsEnabled => _discoveryNotificationsEnabled;
+  bool get updateNotificationsEnabled => _updateNotificationsEnabled;
+  bool get muteForegroundNotifications => _muteForegroundNotifications;
+  bool get isAppInForeground => _lifecycleState == AppLifecycleState.resumed;
+
   /// Initialize notification service
   Future<void> initialize() async {
     if (_isInitialized) return;
 
     try {
       debugPrint('📬 [NotificationService] Initializing...');
+      WidgetsBinding.instance.addObserver(_LifecycleObserver(this));
+      _lifecycleState =
+          WidgetsBinding.instance.lifecycleState ?? AppLifecycleState.resumed;
 
       // Initialize timezone data
       tz.initializeTimeZones();
@@ -72,8 +107,15 @@ class NotificationService {
         onDidReceiveNotificationResponse: _onNotificationResponse,
       );
 
+      final launchDetails = await _notificationsPlugin
+          .getNotificationAppLaunchDetails();
+      if (launchDetails?.didNotificationLaunchApp ?? false) {
+        _launchPayload = launchDetails?.notificationResponse?.payload;
+      }
+
       // Request permissions
       await _requestPermissions();
+      await _loadPreferences();
 
       // Create notification channels (Android)
       await _createNotificationChannels();
@@ -132,6 +174,54 @@ class NotificationService {
     }
   }
 
+  Future<void> _loadPreferences() async {
+    final prefs = await SharedPreferences.getInstance();
+    _messageNotificationsEnabled = prefs.getBool(_prefMessagesEnabled) ?? true;
+    _sarNotificationsEnabled = prefs.getBool(_prefSarEnabled) ?? true;
+    _discoveryNotificationsEnabled =
+        prefs.getBool(_prefDiscoveryEnabled) ?? true;
+    _updateNotificationsEnabled = prefs.getBool(_prefUpdatesEnabled) ?? true;
+    _muteForegroundNotifications = prefs.getBool(_prefMuteForeground) ?? true;
+  }
+
+  Future<void> setMessageNotificationsEnabled(bool value) async {
+    _messageNotificationsEnabled = value;
+    final prefs = await SharedPreferences.getInstance();
+    await prefs.setBool(_prefMessagesEnabled, value);
+  }
+
+  Future<void> setSarNotificationsEnabled(bool value) async {
+    _sarNotificationsEnabled = value;
+    final prefs = await SharedPreferences.getInstance();
+    await prefs.setBool(_prefSarEnabled, value);
+  }
+
+  Future<void> setDiscoveryNotificationsEnabled(bool value) async {
+    _discoveryNotificationsEnabled = value;
+    final prefs = await SharedPreferences.getInstance();
+    await prefs.setBool(_prefDiscoveryEnabled, value);
+  }
+
+  Future<void> setUpdateNotificationsEnabled(bool value) async {
+    _updateNotificationsEnabled = value;
+    final prefs = await SharedPreferences.getInstance();
+    await prefs.setBool(_prefUpdatesEnabled, value);
+  }
+
+  Future<void> setMuteForegroundNotifications(bool value) async {
+    _muteForegroundNotifications = value;
+    final prefs = await SharedPreferences.getInstance();
+    await prefs.setBool(_prefMuteForeground, value);
+  }
+
+  void handleAppLifecycleStateChanged(AppLifecycleState state) {
+    _lifecycleState = state;
+  }
+
+  bool _shouldSuppressForegroundNotifications() {
+    return _muteForegroundNotifications && isAppInForeground;
+  }
+
   /// Create notification channels for Android
   Future<void> _createNotificationChannels() async {
     try {
@@ -177,9 +267,31 @@ class NotificationService {
         showBadge: true,
       );
 
+      const batteryChannel = AndroidNotificationChannel(
+        _batteryChannelId,
+        _batteryChannelName,
+        description: _batteryChannelDescription,
+        importance: Importance.high,
+        playSound: true,
+        enableVibration: true,
+        showBadge: true,
+      );
+
+      const discoveryChannel = AndroidNotificationChannel(
+        _discoveryChannelId,
+        _discoveryChannelName,
+        description: _discoveryChannelDescription,
+        importance: Importance.high,
+        playSound: true,
+        enableVibration: true,
+        showBadge: true,
+      );
+
       await androidPlugin.createNotificationChannel(urgentChannel);
       await androidPlugin.createNotificationChannel(messagesChannel);
       await androidPlugin.createNotificationChannel(updateChannel);
+      await androidPlugin.createNotificationChannel(batteryChannel);
+      await androidPlugin.createNotificationChannel(discoveryChannel);
       debugPrint('✅ [NotificationService] Created notification channels');
     } catch (e) {
       debugPrint('⚠️ [NotificationService] Error creating channels: $e');
@@ -201,6 +313,12 @@ class NotificationService {
     }
   }
 
+  String? consumeLaunchPayload() {
+    final payload = _launchPayload;
+    _launchPayload = null;
+    return payload;
+  }
+
   /// Show urgent notification for SAR marker
   Future<void> showSarNotification({
     required SarMarkerType type,
@@ -222,6 +340,16 @@ class NotificationService {
       );
       return;
     }
+    if (!_sarNotificationsEnabled) {
+      debugPrint('ℹ️ [NotificationService] SAR notifications disabled');
+      return;
+    }
+    if (_shouldSuppressForegroundNotifications()) {
+      debugPrint(
+        'ℹ️ [NotificationService] App in foreground, skipping SAR notification',
+      );
+      return;
+    }
 
     try {
       // Generate unique notification ID based on timestamp
@@ -394,6 +522,16 @@ class NotificationService {
       );
       return;
     }
+    if (!_messageNotificationsEnabled) {
+      debugPrint('ℹ️ [NotificationService] Message notifications disabled');
+      return;
+    }
+    if (_shouldSuppressForegroundNotifications()) {
+      debugPrint(
+        'ℹ️ [NotificationService] App in foreground, skipping message notification',
+      );
+      return;
+    }
 
     try {
       // Generate unique notification ID based on timestamp
@@ -547,6 +685,16 @@ class NotificationService {
       );
       return;
     }
+    if (!_updateNotificationsEnabled) {
+      debugPrint('ℹ️ [NotificationService] Update notifications disabled');
+      return;
+    }
+    if (_shouldSuppressForegroundNotifications()) {
+      debugPrint(
+        'ℹ️ [NotificationService] App in foreground, skipping update notification',
+      );
+      return;
+    }
 
     try {
       // Build notification title and body
@@ -617,4 +765,169 @@ class NotificationService {
       );
     }
   }
+
+  Future<bool> showLowBatteryNotification({
+    required String nodeId,
+    required String nodeName,
+    required double batteryPercent,
+    required bool isCurrentDevice,
+  }) async {
+    if (!_isInitialized) {
+      debugPrint(
+        '⚠️ [NotificationService] Not initialized, skipping notification',
+      );
+      return false;
+    }
+
+    if (!_permissionGranted) {
+      debugPrint(
+        '⚠️ [NotificationService] Permission not granted, skipping notification',
+      );
+      return false;
+    }
+    if (!_messageNotificationsEnabled) {
+      debugPrint('ℹ️ [NotificationService] Message notifications disabled');
+      return false;
+    }
+    if (_shouldSuppressForegroundNotifications()) {
+      debugPrint(
+        'ℹ️ [NotificationService] App in foreground, skipping low battery notification',
+      );
+      return false;
+    }
+
+    final roundedPercent = batteryPercent.round().clamp(0, 100);
+    final title = isCurrentDevice
+        ? 'Device battery low'
+        : 'Contact battery low';
+    final body = isCurrentDevice
+        ? '$nodeName battery is at $roundedPercent%.'
+        : '$nodeName is at $roundedPercent% battery.';
+    final notificationId =
+        _batteryNotificationId + ((nodeId.hashCode & 0x7fffffff) % 1000);
+
+    try {
+      final androidDetails = AndroidNotificationDetails(
+        _batteryChannelId,
+        _batteryChannelName,
+        channelDescription: _batteryChannelDescription,
+        importance: Importance.high,
+        priority: Priority.high,
+        ticker: title,
+        playSound: true,
+        enableVibration: true,
+        showWhen: true,
+        when: DateTime.now().millisecondsSinceEpoch,
+        styleInformation: BigTextStyleInformation(
+          body,
+          contentTitle: title,
+          summaryText: '$roundedPercent%',
+        ),
+      );
+
+      final darwinDetails = DarwinNotificationDetails(
+        presentAlert: true,
+        presentBadge: true,
+        presentSound: true,
+        sound: 'default',
+        threadIdentifier: 'battery_alerts',
+        subtitle: '$roundedPercent%',
+      );
+
+      final notificationDetails = NotificationDetails(
+        android: androidDetails,
+        iOS: darwinDetails,
+      );
+
+      await _notificationsPlugin.show(
+        id: notificationId,
+        title: title,
+        body: body,
+        notificationDetails: notificationDetails,
+        payload: 'battery:$nodeId',
+      );
+
+      debugPrint(
+        '✅ [NotificationService] Showed low battery notification for $nodeName ($roundedPercent%)',
+      );
+      return true;
+    } catch (e) {
+      debugPrint(
+        '❌ [NotificationService] Error showing low battery notification: $e',
+      );
+      return false;
+    }
+  }
+
+  Future<bool> showContactDiscoveredNotification({
+    required String contactKey,
+    String? contactName,
+  }) async {
+    if (!_isInitialized) return false;
+    if (!_permissionGranted) return false;
+    if (!_discoveryNotificationsEnabled) return false;
+    if (_shouldSuppressForegroundNotifications()) return false;
+
+    final shortKey = contactKey.length > 12
+        ? contactKey.substring(0, 12).toUpperCase()
+        : contactKey.toUpperCase();
+    final title = 'New contact discovered';
+    final resolvedName = contactName?.trim();
+    final body = resolvedName != null && resolvedName.isNotEmpty
+        ? '$resolvedName is available in Discovery.'
+        : 'New contact $shortKey is available in Discovery.';
+    final notificationId =
+        _discoveryNotificationId + ((contactKey.hashCode & 0x7fffffff) % 1000);
+
+    try {
+      final androidDetails = AndroidNotificationDetails(
+        _discoveryChannelId,
+        _discoveryChannelName,
+        channelDescription: _discoveryChannelDescription,
+        importance: Importance.high,
+        priority: Priority.high,
+        ticker: title,
+        playSound: true,
+        enableVibration: true,
+        showWhen: true,
+        when: DateTime.now().millisecondsSinceEpoch,
+      );
+
+      final darwinDetails = DarwinNotificationDetails(
+        presentAlert: true,
+        presentBadge: true,
+        presentSound: true,
+        sound: 'default',
+        threadIdentifier: 'discovery_alerts',
+      );
+
+      await _notificationsPlugin.show(
+        id: notificationId,
+        title: title,
+        body: body,
+        notificationDetails: NotificationDetails(
+          android: androidDetails,
+          iOS: darwinDetails,
+        ),
+        payload: 'discovery:$contactKey',
+      );
+      return true;
+    } catch (e) {
+      debugPrint(
+        '❌ [NotificationService] Error showing discovery notification: $e',
+      );
+      return false;
+    }
+  }
+}
+
+class _LifecycleObserver with WidgetsBindingObserver {
+  _LifecycleObserver(this._service);
+
+  final NotificationService _service;
+
+  @override
+  void didChangeAppLifecycleState(AppLifecycleState state) {
+    _service.handleAppLifecycleStateChanged(state);
+  }
 }

lib/services/path_history_service.dart

@@ -6,6 +6,7 @@ import 'package:shared_preferences/shared_preferences.dart';
 import '../models/contact.dart';
 import '../models/path_history.dart';
 import '../models/path_selection.dart';
+import '../utils/log_rx_route_decoder.dart';
 
 class PathHistoryService {
   static const String _storageKey = 'contact_path_history_v1';
@@ -53,6 +54,7 @@ class PathHistoryService {
       pathBytes: contact.routePathBytes.toList(),
       hopCount: contact.routeHopCount,
       hashSize: contact.routeHashSize,
+      source: existing?.source ?? PathRecordSource.learned,
       successCount: existing?.successCount ?? 0,
       failureCount: existing?.failureCount ?? 0,
       lastRoundTripTimeMs: existing?.lastRoundTripTimeMs ?? 0,
@@ -83,15 +85,21 @@ class PathHistoryService {
       return;
     }
 
+    final normalizedPathBytes = LogRxRouteDecoder.reverseHopBytes(
+      pathBytes,
+      hashSize: hashSize,
+    );
+
     final history = _historyFor(contactPublicKeyHex);
-    final signature = pathBytes
+    final signature = normalizedPathBytes
         .map((byte) => byte.toRadixString(16).padLeft(2, '0'))
         .join();
     final existing = _findDirectPath(history.directPaths, signature);
     final updated = PathRecord(
-      pathBytes: List<int>.from(pathBytes),
-      hopCount: pathBytes.length ~/ hashSize,
+      pathBytes: normalizedPathBytes,
+      hopCount: normalizedPathBytes.length ~/ hashSize,
       hashSize: hashSize,
+      source: PathRecordSource.observed,
       successCount: existing?.successCount ?? 0,
       failureCount: existing?.failureCount ?? 0,
       lastRoundTripTimeMs: existing?.lastRoundTripTimeMs ?? 0,
@@ -191,6 +199,7 @@ class PathHistoryService {
       pathBytes: selection.pathBytes.toList(),
       hopCount: selection.hopCount,
       hashSize: selection.hashSize,
+      source: existing?.source ?? PathRecordSource.learned,
       successCount: (existing?.successCount ?? 0) + (success ? 1 : 0),
       failureCount: (existing?.failureCount ?? 0) + (success ? 0 : 1),
       lastRoundTripTimeMs: success

lib/services/sse_server_service.dart

@@ -1,785 +0,0 @@
-import 'dart:async';
-import 'dart:convert';
-import 'dart:io';
-import 'package:flutter/foundation.dart';
-import 'package:shelf/shelf.dart' as shelf;
-import 'package:shelf/shelf_io.dart' as io;
-import 'package:nsd/nsd.dart';
-import '../models/message.dart';
-import '../models/contact.dart';
-import '../models/sse_server_config.dart';
-import 'network_scanner_service.dart';
-
-/// SSE Server Service
-///
-/// Provides a web server with SSE (Server-Sent Events) endpoints for
-/// real-time message and contact updates, enabling multiple app instances
-/// to share a single MeshCore BLE device.
-///
-/// Endpoints:
-/// - GET /sse/messages - SSE stream for message updates
-/// - GET /sse/contacts - SSE stream for contact updates
-/// - POST /api/messages - Send message
-/// - POST /api/messages/channel - Send channel message
-/// - POST /api/contacts/sync - Trigger contact sync
-/// - GET /api/messages/history - Get all messages
-/// - GET /api/contacts - Get all contacts
-/// - GET /api/status - Server health check
-class SseServerService {
-  HttpServer? _server;
-  SseServerConfig? _config;
-  Registration? _bonjourRegistration;
-
-  /// Active SSE connections for messages
-  final Set<StreamController<String>> _messageStreams = {};
-
-  /// Active SSE connections for contacts
-  final Set<StreamController<String>> _contactStreams = {};
-
-  /// Message history (for new clients)
-  final List<Message> _messageHistory = [];
-
-  /// Contact list (for new clients)
-  final Map<String, Contact> _contacts = {};
-
-  /// Timer for cleaning up dead connections
-  Timer? _cleanupTimer;
-
-  /// Device name (for status endpoint)
-  String? _deviceName;
-
-  /// Set device name
-  void setDeviceName(String? name) {
-    _deviceName = name;
-    debugPrint('📝 [SseServer] Device name set to: $name');
-  }
-
-  /// Callback for when a client requests to send a message
-  Future<bool> Function(String recipientPublicKey, String text)? onSendMessage;
-
-  /// Callback for when a client requests to send a channel message
-  Future<void> Function(int channelIdx, String text)? onSendChannelMessage;
-
-  /// Callback for when a client requests contact sync
-  Future<void> Function()? onSyncContacts;
-
-  /// Check if server is running
-  bool get isRunning => _server != null;
-
-  /// Get current configuration
-  SseServerConfig? get config => _config;
-
-  /// Get number of connected clients
-  int get connectedClients => _messageStreams.length;
-
-  /// CORS middleware
-  static shelf.Middleware get _corsHeaders {
-    return shelf.createMiddleware(
-      responseHandler: (shelf.Response response) {
-        return response.change(
-          headers: {
-            'Access-Control-Allow-Origin': '*',
-            'Access-Control-Allow-Methods': 'GET, POST, OPTIONS',
-            'Access-Control-Allow-Headers':
-                'Origin, Content-Type, Authorization',
-          },
-        );
-      },
-    );
-  }
-
-  /// Start the SSE server
-  Future<void> startServer(SseServerConfig config) async {
-    if (_server != null) {
-      debugPrint('⚠️ [SseServer] Server already running');
-      return;
-    }
-
-    _config = config;
-
-    try {
-      debugPrint(
-        '🚀 [SseServer] Starting server on ${config.host}:${config.port}',
-      );
-
-      // Create shelf handler with CORS support
-      final handler = const shelf.Pipeline()
-          .addMiddleware(_corsHeaders)
-          .addMiddleware(shelf.logRequests())
-          .addHandler(_handleRequest);
-
-      // Start HTTP server
-      _server = await io.serve(handler, config.host, config.port);
-
-      debugPrint('✅ [SseServer] Server started on ${config.getServerUrl()}');
-
-      // Start cleanup timer for dead connections
-      _startCleanupTimer();
-
-      // Register Bonjour/mDNS service
-      await _registerBonjourService(config);
-    } catch (e) {
-      debugPrint('❌ [SseServer] Failed to start server: $e');
-      _server = null;
-      rethrow;
-    }
-  }
-
-  /// Register Bonjour/mDNS service for network discovery
-  Future<void> _registerBonjourService(SseServerConfig config) async {
-    try {
-      debugPrint(
-        '📡 [SseServer] Registering Bonjour service ${NetworkScannerService.serviceType}...',
-      );
-
-      _bonjourRegistration = await register(
-        const Service(
-          name: 'MeshCore SSE Server',
-          type: NetworkScannerService.serviceType,
-          port: 0, // Will be set dynamically
-        ),
-      );
-
-      // Update with actual port
-      if (_bonjourRegistration != null) {
-        // Unregister and re-register with correct port
-        await unregister(_bonjourRegistration!);
-        _bonjourRegistration = await register(
-          Service(
-            name: 'MeshCore SSE Server',
-            type: NetworkScannerService.serviceType,
-            port: config.port,
-          ),
-        );
-        debugPrint(
-          '✅ [SseServer] Bonjour service registered on port ${config.port}',
-        );
-      }
-    } catch (e) {
-      debugPrint('⚠️ [SseServer] Failed to register Bonjour service: $e');
-      // Don't throw - server can still work without Bonjour
-    }
-  }
-
-  /// Start cleanup timer to remove dead connections
-  void _startCleanupTimer() {
-    _cleanupTimer?.cancel();
-    _cleanupTimer = Timer.periodic(const Duration(seconds: 60), (timer) {
-      _cleanupDeadConnections();
-    });
-    debugPrint('🧹 [SseServer] Cleanup timer started (60s interval)');
-  }
-
-  /// Clean up dead/closed connections
-  void _cleanupDeadConnections() {
-    // Clean up message streams
-    final deadMessageStreams = _messageStreams
-        .where((s) => s.isClosed)
-        .toList();
-    for (final stream in deadMessageStreams) {
-      _messageStreams.remove(stream);
-    }
-
-    // Clean up contact streams
-    final deadContactStreams = _contactStreams
-        .where((s) => s.isClosed)
-        .toList();
-    for (final stream in deadContactStreams) {
-      _contactStreams.remove(stream);
-    }
-
-    if (deadMessageStreams.isNotEmpty || deadContactStreams.isNotEmpty) {
-      debugPrint(
-        '🧹 [SseServer] Cleaned up ${deadMessageStreams.length} dead message streams, ${deadContactStreams.length} dead contact streams',
-      );
-      debugPrint(
-        '   Active: ${_messageStreams.length} message clients, ${_contactStreams.length} contact clients',
-      );
-    }
-  }
-
-  /// Stop the SSE server
-  Future<void> stopServer() async {
-    if (_server == null) {
-      return;
-    }
-
-    debugPrint('🛑 [SseServer] Stopping server...');
-
-    // Stop cleanup timer
-    _cleanupTimer?.cancel();
-    _cleanupTimer = null;
-
-    // Close all SSE streams
-    for (final stream in _messageStreams) {
-      await stream.close();
-    }
-    _messageStreams.clear();
-
-    for (final stream in _contactStreams) {
-      await stream.close();
-    }
-    _contactStreams.clear();
-
-    // Unregister Bonjour service
-    if (_bonjourRegistration != null) {
-      try {
-        await unregister(_bonjourRegistration!);
-        debugPrint('✅ [SseServer] Bonjour service unregistered');
-      } catch (e) {
-        debugPrint('⚠️ [SseServer] Failed to unregister Bonjour service: $e');
-      }
-      _bonjourRegistration = null;
-    }
-
-    // Close HTTP server
-    await _server!.close(force: true);
-    _server = null;
-    _config = null;
-
-    debugPrint('✅ [SseServer] Server stopped');
-  }
-
-  /// Main request handler
-  Future<shelf.Response> _handleRequest(shelf.Request request) async {
-    // Check authentication if token is configured
-    if (_config?.authToken != null) {
-      final authHeader = request.headers['authorization'];
-      if (authHeader != 'Bearer ${_config!.authToken}') {
-        return shelf.Response.forbidden('Invalid authentication token');
-      }
-    }
-
-    final path = request.url.path;
-    final method = request.method;
-
-    debugPrint('📨 [SseServer] $method /$path');
-
-    // Route requests
-    if (method == 'GET' && path == 'sse/messages') {
-      return _handleSseMessages(request);
-    } else if (method == 'GET' && path == 'sse/contacts') {
-      return _handleSseContacts(request);
-    } else if (method == 'POST' && path == 'api/messages') {
-      return _handlePostMessage(request);
-    } else if (method == 'POST' && path == 'api/messages/channel') {
-      return _handlePostChannelMessage(request);
-    } else if (method == 'POST' && path == 'api/contacts/sync') {
-      return _handlePostContactsSync(request);
-    } else if (method == 'GET' && path == 'api/messages/history') {
-      return _handleGetMessageHistory(request);
-    } else if (method == 'GET' && path == 'api/contacts') {
-      return _handleGetContacts(request);
-    } else if (method == 'GET' && path == 'api/status') {
-      return _handleGetStatus(request);
-    } else if (method == 'GET' && path == '') {
-      return _handleRoot(request);
-    }
-
-    return shelf.Response.notFound('Not found');
-  }
-
-  /// Handle SSE messages stream
-  shelf.Response _handleSseMessages(shelf.Request request) {
-    return request.hijack((channel) async {
-      debugPrint(
-        '📥 [SseServer] New SSE client connected (messages) via hijack',
-      );
-
-      // Set up the sink for sending data
-      final sink = utf8.encoder.startChunkedConversion(channel.sink);
-
-      // Send SSE headers
-      sink.add('HTTP/1.1 200 OK\r\n');
-      sink.add('Content-Type: text/event-stream\r\n');
-      sink.add('Cache-Control: no-cache\r\n');
-      sink.add('Connection: keep-alive\r\n');
-      sink.add('\r\n');
-
-      // Create controller for this connection
-      final controller = StreamController<String>();
-      _messageStreams.add(controller);
-
-      debugPrint('   Total clients: ${_messageStreams.length}');
-
-      // Send initial connection event
-      sink.add(': connected\n\n');
-
-      // Send initial message history
-      for (final message in _messageHistory) {
-        final event = _formatSseEvent('message', _messageToJson(message));
-        sink.add(event);
-      }
-
-      // Start keep-alive timer
-      final keepAliveTimer = Timer.periodic(const Duration(seconds: 30), (
-        timer,
-      ) {
-        try {
-          sink.add(': keepalive\n\n');
-        } catch (e) {
-          debugPrint('⚠️ [SseServer] Keep-alive failed: $e');
-          timer.cancel();
-        }
-      });
-
-      // Listen to controller for new messages to broadcast
-      final subscription = controller.stream.listen(
-        (data) {
-          try {
-            sink.add(data);
-          } catch (e) {
-            debugPrint('⚠️ [SseServer] Failed to send data: $e');
-          }
-        },
-        onDone: () {
-          debugPrint('📤 [SseServer] Controller stream closed');
-        },
-      );
-
-      // Wait for channel to close
-      await channel.stream.drain();
-
-      // Cleanup
-      keepAliveTimer.cancel();
-      await subscription.cancel();
-      _messageStreams.remove(controller);
-      await controller.close();
-
-      debugPrint('📤 [SseServer] SSE client disconnected (messages)');
-      debugPrint('   Total clients: ${_messageStreams.length}');
-    });
-  }
-
-  /// Handle SSE contacts stream
-  shelf.Response _handleSseContacts(shelf.Request request) {
-    return request.hijack((channel) async {
-      debugPrint(
-        '📥 [SseServer] New SSE client connected (contacts) via hijack',
-      );
-
-      // Set up the sink for sending data
-      final sink = utf8.encoder.startChunkedConversion(channel.sink);
-
-      // Send SSE headers
-      sink.add('HTTP/1.1 200 OK\r\n');
-      sink.add('Content-Type: text/event-stream\r\n');
-      sink.add('Cache-Control: no-cache\r\n');
-      sink.add('Connection: keep-alive\r\n');
-      sink.add('\r\n');
-
-      // Create controller for this connection
-      final controller = StreamController<String>();
-      _contactStreams.add(controller);
-
-      debugPrint('   Total clients: ${_contactStreams.length}');
-
-      // Send initial connection event
-      sink.add(': connected\n\n');
-
-      // Send initial contact list
-      for (final contact in _contacts.values) {
-        final event = _formatSseEvent('contact', _contactToJson(contact));
-        sink.add(event);
-      }
-
-      // Start keep-alive timer
-      final keepAliveTimer = Timer.periodic(const Duration(seconds: 30), (
-        timer,
-      ) {
-        try {
-          sink.add(': keepalive\n\n');
-        } catch (e) {
-          debugPrint('⚠️ [SseServer] Keep-alive failed: $e');
-          timer.cancel();
-        }
-      });
-
-      // Listen to controller for new messages to broadcast
-      final subscription = controller.stream.listen(
-        (data) {
-          try {
-            sink.add(data);
-          } catch (e) {
-            debugPrint('⚠️ [SseServer] Failed to send data: $e');
-          }
-        },
-        onDone: () {
-          debugPrint('📤 [SseServer] Controller stream closed');
-        },
-      );
-
-      // Wait for channel to close
-      await channel.stream.drain();
-
-      // Cleanup
-      keepAliveTimer.cancel();
-      await subscription.cancel();
-      _contactStreams.remove(controller);
-      await controller.close();
-
-      debugPrint('📤 [SseServer] SSE client disconnected (contacts)');
-      debugPrint('   Total clients: ${_contactStreams.length}');
-    });
-  }
-
-  /// Handle POST message request
-  Future<shelf.Response> _handlePostMessage(shelf.Request request) async {
-    try {
-      final body = await request.readAsString();
-      final json = jsonDecode(body) as Map<String, dynamic>;
-
-      final recipientPublicKey = json['recipientPublicKey'] as String;
-      final text = json['text'] as String;
-
-      if (onSendMessage == null) {
-        return shelf.Response.internalServerError(
-          body: jsonEncode({'error': 'Send message callback not configured'}),
-        );
-      }
-
-      final success = await onSendMessage!(recipientPublicKey, text);
-
-      return shelf.Response.ok(
-        jsonEncode({'success': success}),
-        headers: {'content-type': 'application/json'},
-      );
-    } catch (e) {
-      debugPrint('❌ [SseServer] Error handling POST message: $e');
-      return shelf.Response.internalServerError(
-        body: jsonEncode({'error': e.toString()}),
-      );
-    }
-  }
-
-  /// Handle POST channel message request
-  Future<shelf.Response> _handlePostChannelMessage(
-    shelf.Request request,
-  ) async {
-    try {
-      final body = await request.readAsString();
-      final json = jsonDecode(body) as Map<String, dynamic>;
-
-      final channelIdx = json['channelIdx'] as int;
-      final text = json['text'] as String;
-
-      if (onSendChannelMessage == null) {
-        return shelf.Response.internalServerError(
-          body: jsonEncode({
-            'error': 'Send channel message callback not configured',
-          }),
-        );
-      }
-
-      await onSendChannelMessage!(channelIdx, text);
-
-      return shelf.Response.ok(
-        jsonEncode({'success': true}),
-        headers: {'content-type': 'application/json'},
-      );
-    } catch (e) {
-      debugPrint('❌ [SseServer] Error handling POST channel message: $e');
-      return shelf.Response.internalServerError(
-        body: jsonEncode({'error': e.toString()}),
-      );
-    }
-  }
-
-  /// Handle POST contacts sync request
-  Future<shelf.Response> _handlePostContactsSync(shelf.Request request) async {
-    try {
-      if (onSyncContacts == null) {
-        return shelf.Response.internalServerError(
-          body: jsonEncode({'error': 'Sync contacts callback not configured'}),
-        );
-      }
-
-      await onSyncContacts!();
-
-      return shelf.Response.ok(
-        jsonEncode({'success': true}),
-        headers: {'content-type': 'application/json'},
-      );
-    } catch (e) {
-      debugPrint('❌ [SseServer] Error handling POST contacts sync: $e');
-      return shelf.Response.internalServerError(
-        body: jsonEncode({'error': e.toString()}),
-      );
-    }
-  }
-
-  /// Handle GET message history request
-  shelf.Response _handleGetMessageHistory(shelf.Request request) {
-    final messages = _messageHistory.map(_messageToJson).toList();
-    return shelf.Response.ok(
-      jsonEncode({'messages': messages}),
-      headers: {'content-type': 'application/json'},
-    );
-  }
-
-  /// Handle GET contacts request
-  shelf.Response _handleGetContacts(shelf.Request request) {
-    final contacts = _contacts.values.map(_contactToJson).toList();
-    return shelf.Response.ok(
-      jsonEncode({'contacts': contacts}),
-      headers: {'content-type': 'application/json'},
-    );
-  }
-
-  /// Handle GET status request
-  shelf.Response _handleGetStatus(shelf.Request request) {
-    return shelf.Response.ok(
-      jsonEncode({
-        'status': 'running',
-        'connectedClients': connectedClients,
-        'messageCount': _messageHistory.length,
-        'contactCount': _contacts.length,
-        'deviceName': _deviceName,
-      }),
-      headers: {'content-type': 'application/json'},
-    );
-  }
-
-  /// Handle root request (landing page)
-  shelf.Response _handleRoot(shelf.Request request) {
-    final html = '''
-<!DOCTYPE html>
-<html>
-<head>
-  <title>MeshCore SAR - SSE Server</title>
-  <meta name="viewport" content="width=device-width, initial-scale=1">
-  <style>
-    body { font-family: sans-serif; margin: 40px; background: #f5f5f5; }
-    .container { max-width: 600px; margin: 0 auto; background: white; padding: 30px; border-radius: 8px; box-shadow: 0 2px 4px rgba(0,0,0,0.1); }
-    h1 { color: #333; }
-    .status { background: #4CAF50; color: white; padding: 10px; border-radius: 4px; margin: 20px 0; }
-    .endpoint { background: #f9f9f9; padding: 10px; margin: 10px 0; border-left: 3px solid #2196F3; font-family: monospace; }
-    code { background: #eee; padding: 2px 6px; border-radius: 3px; }
-  </style>
-</head>
-<body>
-  <div class="container">
-    <h1>🚀 MeshCore SAR Server</h1>
-    <div class="status">✅ Server is running</div>
-    <p>This server enables multiple MeshCore SAR clients to share a single BLE device.</p>
-
-    <h2>📡 SSE Endpoints</h2>
-    <div class="endpoint">GET /sse/messages</div>
-    <div class="endpoint">GET /sse/contacts</div>
-
-    <h2>🔧 API Endpoints</h2>
-    <div class="endpoint">POST /api/messages</div>
-    <div class="endpoint">POST /api/messages/channel</div>
-    <div class="endpoint">POST /api/contacts/sync</div>
-    <div class="endpoint">GET /api/messages/history</div>
-    <div class="endpoint">GET /api/contacts</div>
-    <div class="endpoint">GET /api/status</div>
-
-    <h2>📊 Stats</h2>
-    <p>Connected clients: <strong id="clients">Loading...</strong></p>
-    <p>Messages: <strong id="messages">Loading...</strong></p>
-    <p>Contacts: <strong id="contacts">Loading...</strong></p>
-  </div>
-
-  <script>
-    async function updateStats() {
-      try {
-        const res = await fetch('/api/status');
-        const data = await res.json();
-        document.getElementById('clients').textContent = data.connectedClients;
-        document.getElementById('messages').textContent = data.messageCount;
-        document.getElementById('contacts').textContent = data.contactCount;
-      } catch (e) {
-        console.error('Failed to fetch stats:', e);
-      }
-    }
-    updateStats();
-    setInterval(updateStats, 5000);
-  </script>
-</body>
-</html>
-''';
-    return shelf.Response.ok(html, headers: {'content-type': 'text/html'});
-  }
-
-  /// Broadcast a new message to all SSE clients
-  void broadcastMessage(Message message) {
-    // Add to history (limit to 1000 messages)
-    _messageHistory.add(message);
-    if (_messageHistory.length > 1000) {
-      _messageHistory.removeAt(0);
-    }
-
-    // Broadcast to all connected clients
-    final event = _formatSseEvent('message', _messageToJson(message));
-    final deadStreams = <StreamController<String>>[];
-
-    for (final stream in _messageStreams) {
-      if (stream.isClosed) {
-        deadStreams.add(stream);
-      } else {
-        try {
-          stream.add(event);
-        } catch (e) {
-          debugPrint(
-            '⚠️ [SseServer] Failed to send to stream, marking as dead: $e',
-          );
-          deadStreams.add(stream);
-        }
-      }
-    }
-
-    // Remove dead streams
-    for (final stream in deadStreams) {
-      _messageStreams.remove(stream);
-      stream.close().catchError(
-        (e) => debugPrint('⚠️ [SseServer] Error closing dead stream: $e'),
-      );
-    }
-
-    if (deadStreams.isNotEmpty) {
-      debugPrint(
-        '🧹 [SseServer] Removed ${deadStreams.length} dead message streams during broadcast',
-      );
-    }
-
-    debugPrint(
-      '📢 [SseServer] Broadcasted message to ${_messageStreams.length} clients',
-    );
-  }
-
-  /// Broadcast a new or updated contact to all SSE clients
-  void broadcastContact(Contact contact) {
-    // Update contact list
-    _contacts[contact.publicKeyHex] = contact;
-
-    // Broadcast to all connected clients
-    final event = _formatSseEvent('contact', _contactToJson(contact));
-    final deadStreams = <StreamController<String>>[];
-
-    for (final stream in _contactStreams) {
-      if (stream.isClosed) {
-        deadStreams.add(stream);
-      } else {
-        try {
-          stream.add(event);
-        } catch (e) {
-          debugPrint(
-            '⚠️ [SseServer] Failed to send to stream, marking as dead: $e',
-          );
-          deadStreams.add(stream);
-        }
-      }
-    }
-
-    // Remove dead streams
-    for (final stream in deadStreams) {
-      _contactStreams.remove(stream);
-      stream.close().catchError(
-        (e) => debugPrint('⚠️ [SseServer] Error closing dead stream: $e'),
-      );
-    }
-
-    if (deadStreams.isNotEmpty) {
-      debugPrint(
-        '🧹 [SseServer] Removed ${deadStreams.length} dead contact streams during broadcast',
-      );
-    }
-
-    debugPrint(
-      '📢 [SseServer] Broadcasted contact to ${_contactStreams.length} clients',
-    );
-  }
-
-  /// Format SSE event
-  String _formatSseEvent(String eventType, Map<String, dynamic> data) {
-    final jsonData = jsonEncode(data);
-    return 'event: $eventType\ndata: $jsonData\n\n';
-  }
-
-  /// Convert Message to JSON
-  Map<String, dynamic> _messageToJson(Message message) {
-    return {
-      'id': message.id,
-      'messageType': message.messageType.name,
-      'senderPublicKeyPrefix': message.senderPublicKeyPrefix?.toList(),
-      'channelIdx': message.channelIdx,
-      'pathLen': message.pathLen,
-      'textType': message.textType.value,
-      'senderTimestamp': message.senderTimestamp,
-      'text': message.text,
-      'isSarMarker': message.isSarMarker,
-      'sarGpsCoordinates': message.sarGpsCoordinates != null
-          ? {
-              'latitude': message.sarGpsCoordinates!.latitude,
-              'longitude': message.sarGpsCoordinates!.longitude,
-            }
-          : null,
-      'sarNotes': message.sarNotes,
-      'sarCustomEmoji': message.sarCustomEmoji,
-      'sarColorIndex': message.sarColorIndex,
-      'receivedAt': message.receivedAt.toIso8601String(),
-      'senderName': message.senderName,
-      'deliveryStatus': message.deliveryStatus.name,
-      'expectedAckTag': message.expectedAckTag,
-      'suggestedTimeoutMs': message.suggestedTimeoutMs,
-      'roundTripTimeMs': message.roundTripTimeMs,
-      'deliveredAt': message.deliveredAt?.toIso8601String(),
-      'recipientPublicKey': message.recipientPublicKey?.toList(),
-      'retryAttempt': message.retryAttempt,
-      'lastRetryAt': message.lastRetryAt?.toIso8601String(),
-      'usedFloodFallback': message.usedFloodFallback,
-      'isRead': message.isRead,
-      'echoCount': message.echoCount,
-      'firstEchoAt': message.firstEchoAt?.toIso8601String(),
-      'lastEchoSnrRaw': message.lastEchoSnrRaw,
-      'lastEchoRssiDbm': message.lastEchoRssiDbm,
-      'lastEchoAt': message.lastEchoAt?.toIso8601String(),
-      'isDrawing': message.isDrawing,
-      'drawingId': message.drawingId,
-    };
-  }
-
-  /// Convert Contact to JSON
-  Map<String, dynamic> _contactToJson(Contact contact) {
-    return {
-      'publicKey': contact.publicKey.toList(),
-      'publicKeyHex': contact.publicKeyHex,
-      'type': contact.type.value,
-      'flags': contact.flags,
-      'outPathLen': contact.outPathLen,
-      'outPath': contact.outPath.toList(),
-      'advName': contact.advName,
-      'lastAdvert': contact.lastAdvert,
-      'advLat': contact.advLat,
-      'advLon': contact.advLon,
-      'lastMod': contact.lastMod,
-      'telemetry': contact.telemetry != null
-          ? {
-              'batteryPercentage': contact.telemetry!.batteryPercentage,
-              'batteryMilliVolts': contact.telemetry!.batteryMilliVolts,
-              'temperature': contact.telemetry!.temperature,
-              'humidity': contact.telemetry!.humidity,
-              'pressure': contact.telemetry!.pressure,
-              'gpsLocation': contact.telemetry!.gpsLocation != null
-                  ? {
-                      'latitude': contact.telemetry!.gpsLocation!.latitude,
-                      'longitude': contact.telemetry!.gpsLocation!.longitude,
-                    }
-                  : null,
-              'timestamp': contact.telemetry!.timestamp.toIso8601String(),
-            }
-          : null,
-    };
-  }
-
-  /// Clear message history
-  void clearMessageHistory() {
-    _messageHistory.clear();
-  }
-
-  /// Clear contact list
-  void clearContacts() {
-    _contacts.clear();
-  }
-}

lib/services/voice_codec_service_io.dart

@@ -3,18 +3,22 @@ import 'package:codec2_flutter/codec2_flutter.dart';
 import 'package:flutter/foundation.dart';
 import '../utils/voice_message_parser.dart';
 
-export 'package:codec2_flutter/codec2_flutter.dart' show Codec2Mode;
-
-/// Maps [VoicePacketMode] to the [Codec2Mode] enum from the FFI plugin.
 Codec2Mode codec2ModeFor(VoicePacketMode pktMode) {
   switch (pktMode) {
-    case VoicePacketMode.mode3200: return Codec2Mode.mode3200;
-    case VoicePacketMode.mode1600: return Codec2Mode.mode1600;
-    case VoicePacketMode.mode1400: return Codec2Mode.mode1400;
-    case VoicePacketMode.mode700c: return Codec2Mode.mode700c;
-    case VoicePacketMode.mode1200: return Codec2Mode.mode1200;
-    case VoicePacketMode.mode1300: return Codec2Mode.mode1300;
-    case VoicePacketMode.mode2400: return Codec2Mode.mode2400;
+    case VoicePacketMode.mode3200:
+      return Codec2Mode.mode3200;
+    case VoicePacketMode.mode1600:
+      return Codec2Mode.mode1600;
+    case VoicePacketMode.mode1400:
+      return Codec2Mode.mode1400;
+    case VoicePacketMode.mode700c:
+      return Codec2Mode.mode700c;
+    case VoicePacketMode.mode1200:
+      return Codec2Mode.mode1200;
+    case VoicePacketMode.mode1300:
+      return Codec2Mode.mode1300;
+    case VoicePacketMode.mode2400:
+      return Codec2Mode.mode2400;
   }
 }
 
@@ -39,14 +43,11 @@ class VoiceCodecService {
     }
   }
 
-  /// Encode [pcm] (Int16 samples, 8000 Hz mono) with [mode].
-  /// Returns the raw Codec2-encoded bytes.
   Future<Uint8List> encode(Int16List pcm, VoicePacketMode mode) {
     _ensureCodec2Supported();
     return Codec2.encodeInIsolate(pcm, codec2ModeFor(mode));
   }
 
-  /// Decode [codec2Bytes] back to Int16 PCM (8000 Hz mono) with [mode].
   Future<Int16List> decode(Uint8List codec2Bytes, VoicePacketMode mode) {
     _ensureCodec2Supported();
     return Codec2.decodeInIsolate(codec2Bytes, codec2ModeFor(mode));
@@ -59,24 +60,14 @@ class VoiceCodecService {
     VoicePacketMode mode,
   ) async {
     _ensureCodec2Supported();
-    final c2Mode = codec2ModeFor(mode);
-    final c2 = Codec2.create(c2Mode);
-    final spf = c2.samplesPerFrame;
-    c2.destroy();
-
-    // Estimate total samples (use actual data or silence per missing packet)
     final all = <Int16List>[];
     for (final pkt in packets) {
       if (pkt == null || pkt.codec2Data.isEmpty) {
-        // Silence for missing packet — duration approximated by mode
-        final silenceSamples = (codec2ModeFor(mode).framesPerSecond) * spf;
-        all.add(Int16List(silenceSamples));
+        all.add(Int16List(mode.samplesPerPacket));
       } else {
-        final decoded = await Codec2.decodeInIsolate(pkt.codec2Data, c2Mode);
-        all.add(decoded);
+        all.add(await decode(pkt.codec2Data, mode));
       }
     }
-
     final total = all.fold<int>(0, (sum, l) => sum + l.length);
     final result = Int16List(total);
     var offset = 0;

lib/services/voice_codec_service_stub.dart

@@ -1,7 +1,6 @@
 import 'dart:typed_data';
 import '../utils/voice_message_parser.dart';
 
-/// Web/unsupported platform stub — Codec2 FFI is not available.
 enum Codec2Mode {
   mode3200(0),
   mode2400(1),
@@ -19,13 +18,20 @@ enum Codec2Mode {
 
   int get bytesPerSecond {
     switch (this) {
-      case mode3200: return 400;
-      case mode700c: return 100;
-      case mode1200: return 150;
-      case mode1300: return 175;
-      case mode1400: return 175;
-      case mode1600: return 200;
-      case mode2400: return 300;
+      case mode3200:
+        return 400;
+      case mode700c:
+        return 100;
+      case mode1200:
+        return 150;
+      case mode1300:
+        return 175;
+      case mode1400:
+        return 175;
+      case mode1600:
+        return 200;
+      case mode2400:
+        return 300;
     }
   }
 
@@ -40,13 +46,20 @@ enum Codec2Mode {
 
 Codec2Mode codec2ModeFor(VoicePacketMode pktMode) {
   switch (pktMode) {
-    case VoicePacketMode.mode3200: return Codec2Mode.mode3200;
-    case VoicePacketMode.mode1600: return Codec2Mode.mode1600;
-    case VoicePacketMode.mode1400: return Codec2Mode.mode1400;
-    case VoicePacketMode.mode700c: return Codec2Mode.mode700c;
-    case VoicePacketMode.mode1200: return Codec2Mode.mode1200;
-    case VoicePacketMode.mode1300: return Codec2Mode.mode1300;
-    case VoicePacketMode.mode2400: return Codec2Mode.mode2400;
+    case VoicePacketMode.mode3200:
+      return Codec2Mode.mode3200;
+    case VoicePacketMode.mode1600:
+      return Codec2Mode.mode1600;
+    case VoicePacketMode.mode1400:
+      return Codec2Mode.mode1400;
+    case VoicePacketMode.mode700c:
+      return Codec2Mode.mode700c;
+    case VoicePacketMode.mode1200:
+      return Codec2Mode.mode1200;
+    case VoicePacketMode.mode1300:
+      return Codec2Mode.mode1300;
+    case VoicePacketMode.mode2400:
+      return Codec2Mode.mode2400;
   }
 }
 
@@ -66,6 +79,5 @@ class VoiceCodecService {
   Future<Int16List> decodePackets(
     List<VoicePacket?> packets,
     VoicePacketMode mode,
-  ) =>
-      Future.error(UnsupportedError('Voice not supported on web'));
+  ) => Future.error(UnsupportedError('Voice not supported on web'));
 }

lib/services/voice_player_service.dart

@@ -5,7 +5,7 @@ import 'package:audioplayers/audioplayers.dart';
 import 'package:flutter/foundation.dart';
 import 'package:path_provider/path_provider.dart';
 
-/// Plays decoded 8000 Hz / 16-bit mono PCM samples by writing a WAV file
+/// Plays decoded mono PCM samples by writing a WAV file
 /// to the system temp directory and using [AudioPlayer].
 class VoicePlayerService {
   final AudioPlayer _player = AudioPlayer();
@@ -49,16 +49,17 @@ class VoicePlayerService {
     });
   }
 
-  /// Play [pcmSamples] (Int16, 8000 Hz, mono).
-  Future<void> play(Int16List pcmSamples) async {
+  Future<void> play(Int16List pcmSamples, {required int sampleRateHz}) async {
     debugPrint('🔊 [VoicePlayer] play() called, ${pcmSamples.length} samples');
     if (_isPlaying) await stop();
     _position = Duration.zero;
-    _duration = Duration(milliseconds: (pcmSamples.length * 1000) ~/ 8000);
+    _duration = Duration(
+      milliseconds: (pcmSamples.length * 1000) ~/ sampleRateHz,
+    );
     _playbackStartedAt = DateTime.now();
     _events.add(null);
 
-    final wavBytes = _buildWav(pcmSamples, sampleRate: 8000);
+    final wavBytes = _buildWav(pcmSamples, sampleRate: sampleRateHz);
     final tmpDir = await getTemporaryDirectory();
     final file = File('${tmpDir.path}/vc_voice.wav');
     await file.writeAsBytes(wavBytes);

lib/services/voice_recorder_service.dart

@@ -4,7 +4,7 @@ import 'dart:typed_data';
 import 'package:flutter/foundation.dart';
 import 'package:record/record.dart';
 
-/// Captures raw PCM audio at 8000 Hz, 16-bit mono.
+/// Captures raw PCM audio at a codec-selected sample rate, 16-bit mono.
 ///
 /// [startCapture] returns a [Stream<Int16List>] that emits chunks of PCM
 /// samples every [chunkDuration].  Call [stopCapture] to end recording.
@@ -27,12 +27,16 @@ class VoiceRecorderService {
   /// [enableBandPassFilter] applies voice-tuned band-pass filtering when true.
   /// [enableCompressor] normalizes speech dynamics before encoding.
   /// [enableLimiter] protects against clipping peaks before encoding.
-  /// The returned stream emits [Int16List] chunks that are ready for Codec2 encoding.
+  /// The returned stream emits [Int16List] chunks that are ready for voice encoding.
   Stream<Int16List> startCapture({
     Duration chunkDuration = const Duration(seconds: 1),
+    int sampleRateHz = 8000,
     bool enableBandPassFilter = true,
     bool enableCompressor = true,
     bool enableLimiter = true,
+    bool enableAutoGain = false,
+    bool enableEchoCancellation = false,
+    bool enableNoiseSuppression = false,
   }) {
     if (_isRecording) {
       throw StateError('VoiceRecorderService: already recording');
@@ -43,39 +47,59 @@ class VoiceRecorderService {
 
     _startRecording(
       chunkDuration,
+      sampleRateHz: sampleRateHz,
       enableBandPassFilter: enableBandPassFilter,
       enableCompressor: enableCompressor,
       enableLimiter: enableLimiter,
+      enableAutoGain: enableAutoGain,
+      enableEchoCancellation: enableEchoCancellation,
+      enableNoiseSuppression: enableNoiseSuppression,
     );
     return _controller!.stream;
   }
 
   Future<void> _startRecording(
     Duration chunkDuration, {
+    required int sampleRateHz,
     required bool enableBandPassFilter,
     required bool enableCompressor,
     required bool enableLimiter,
+    required bool enableAutoGain,
+    required bool enableEchoCancellation,
+    required bool enableNoiseSuppression,
   }) async {
-    final config = const RecordConfig(
+    final useBandPassFilter = enableBandPassFilter;
+    final useCompressor = enableCompressor;
+    final useLimiter = enableLimiter;
+    final config = RecordConfig(
       encoder: AudioEncoder.pcm16bits,
-      sampleRate: 8000,
+      sampleRate: sampleRateHz,
       numChannels: 1,
       bitRate: 128000, // ignored for PCM, but required by API
+      autoGain: enableAutoGain,
+      echoCancel: enableEchoCancellation,
+      noiseSuppress: enableNoiseSuppression,
     );
 
     try {
       final stream = await _recorder.startStream(config);
       final voiceFilter = _VoiceBandPassFilter(
-        sampleRate: 8000,
+        sampleRate: sampleRateHz,
         lowCutHz: 250.0,
         highCutHz: 3400.0,
       );
       final dynamics = _VoiceDynamicsProcessor(
-        sampleRate: 8000,
-        enableCompressor: enableCompressor,
-        enableLimiter: enableLimiter,
+        sampleRate: sampleRateHz,
+        thresholdDb: -18.0,
+        ratio: 2.5,
+        attackMs: 8.0,
+        releaseMs: 120.0,
+        makeupGainDb: 4.0,
+        enableCompressor: useCompressor,
+        enableLimiter: useLimiter,
       );
-      final chunkBytes = 8000 * 2 * chunkDuration.inMilliseconds ~/ 1000;
+      final chunkBytes =
+          sampleRateHz * 2 * chunkDuration.inMilliseconds ~/ 1000;
       final buffer = <int>[];
 
       _sub = stream.listen(
@@ -85,9 +109,7 @@ class VoiceRecorderService {
             final chunk = buffer.sublist(0, chunkBytes);
             buffer.removeRange(0, chunkBytes);
             final pcm = _bytesToInt16(Uint8List.fromList(chunk));
-            final filtered = enableBandPassFilter
-                ? voiceFilter.process(pcm)
-                : pcm;
+            final filtered = useBandPassFilter ? voiceFilter.process(pcm) : pcm;
             _controller?.add(dynamics.process(filtered));
           }
         },
@@ -95,9 +117,7 @@ class VoiceRecorderService {
           if (buffer.isNotEmpty) {
             final padded = _padToEven(buffer);
             final pcm = _bytesToInt16(Uint8List.fromList(padded));
-            final filtered = enableBandPassFilter
-                ? voiceFilter.process(pcm)
-                : pcm;
+            final filtered = useBandPassFilter ? voiceFilter.process(pcm) : pcm;
             _controller?.add(dynamics.process(filtered));
           }
           _controller?.close();
@@ -163,17 +183,22 @@ class _VoiceDynamicsProcessor {
 
   _VoiceDynamicsProcessor({
     required int sampleRate,
+    required double thresholdDb,
+    required double ratio,
+    required double attackMs,
+    required double releaseMs,
+    required double makeupGainDb,
     required bool enableCompressor,
     required bool enableLimiter,
   }) : _enableCompressor = enableCompressor,
        _enableLimiter = enableLimiter,
        _compressor = _SimpleCompressor(
          sampleRate: sampleRate.toDouble(),
-         thresholdDb: -18.0,
-         ratio: 2.5,
-         attackMs: 8.0,
-         releaseMs: 120.0,
-         makeupGainDb: 4.0,
+         thresholdDb: thresholdDb,
+         ratio: ratio,
+         attackMs: attackMs,
+         releaseMs: releaseMs,
+         makeupGainDb: makeupGainDb,
        ),
        _limiter = _PeakLimiter(ceilingDb: -1.0);
 

lib/theme/app_theme.dart

@@ -1,123 +1,141 @@
 import 'package:flutter/material.dart';
 
-enum AppThemeMode {
-  light,
-  dark,
-  sarRed,
-  sarGreen,
-  sarNavyBlue,
-  system,
-}
+enum AppThemeMode { light, dark, sarRed, sarGreen, sarNavyBlue, system }
 
 class AppTheme {
+  static ThemeData _withSharedControls(ThemeData theme) {
+    final colorScheme = theme.colorScheme;
+    return theme.copyWith(
+      switchTheme: SwitchThemeData(
+        thumbColor: WidgetStateProperty.resolveWith((states) {
+          if (states.contains(WidgetState.disabled)) {
+            return colorScheme.onSurface.withValues(alpha: 0.38);
+          }
+          if (states.contains(WidgetState.selected)) {
+            return colorScheme.onPrimary;
+          }
+          return colorScheme.outline;
+        }),
+        trackColor: WidgetStateProperty.resolveWith((states) {
+          if (states.contains(WidgetState.disabled)) {
+            return colorScheme.onSurface.withValues(alpha: 0.12);
+          }
+          if (states.contains(WidgetState.selected)) {
+            return colorScheme.primary;
+          }
+          return colorScheme.surfaceContainerHighest;
+        }),
+        trackOutlineColor: WidgetStateProperty.resolveWith((states) {
+          if (states.contains(WidgetState.selected)) {
+            return colorScheme.primary;
+          }
+          return colorScheme.outlineVariant;
+        }),
+      ),
+    );
+  }
+
   // Light theme (Blue)
   static ThemeData get lightTheme {
-    return ThemeData(
-      useMaterial3: true,
-      colorScheme: ColorScheme.fromSeed(
-        seedColor: Colors.blue,
-        brightness: Brightness.light,
-      ),
-      appBarTheme: const AppBarTheme(
-        centerTitle: true,
-        elevation: 0,
-      ),
-      cardTheme: CardThemeData(
-        elevation: 2,
-        shape: RoundedRectangleBorder(
-          borderRadius: BorderRadius.circular(12),
+    return _withSharedControls(
+      ThemeData(
+        useMaterial3: true,
+        colorScheme: ColorScheme.fromSeed(
+          seedColor: Colors.blue,
+          brightness: Brightness.light,
         ),
-      ),
-      inputDecorationTheme: InputDecorationTheme(
-        border: OutlineInputBorder(
-          borderRadius: BorderRadius.circular(12),
+        appBarTheme: const AppBarTheme(centerTitle: true, elevation: 0),
+        cardTheme: CardThemeData(
+          elevation: 2,
+          shape: RoundedRectangleBorder(
+            borderRadius: BorderRadius.circular(12),
+          ),
+        ),
+        inputDecorationTheme: InputDecorationTheme(
+          border: OutlineInputBorder(borderRadius: BorderRadius.circular(12)),
+          filled: true,
         ),
-        filled: true,
       ),
     );
   }
 
   // Dark theme (Blue)
   static ThemeData get darkTheme {
-    return ThemeData(
-      useMaterial3: true,
-      colorScheme: ColorScheme.fromSeed(
-        seedColor: Colors.blue,
-        brightness: Brightness.dark,
-      ),
-      appBarTheme: const AppBarTheme(
-        centerTitle: true,
-        elevation: 0,
-      ),
-      cardTheme: CardThemeData(
-        elevation: 2,
-        shape: RoundedRectangleBorder(
-          borderRadius: BorderRadius.circular(12),
+    return _withSharedControls(
+      ThemeData(
+        useMaterial3: true,
+        colorScheme: ColorScheme.fromSeed(
+          seedColor: Colors.blue,
+          brightness: Brightness.dark,
         ),
-      ),
-      inputDecorationTheme: InputDecorationTheme(
-        border: OutlineInputBorder(
-          borderRadius: BorderRadius.circular(12),
+        appBarTheme: const AppBarTheme(centerTitle: true, elevation: 0),
+        cardTheme: CardThemeData(
+          elevation: 2,
+          shape: RoundedRectangleBorder(
+            borderRadius: BorderRadius.circular(12),
+          ),
+        ),
+        inputDecorationTheme: InputDecorationTheme(
+          border: OutlineInputBorder(borderRadius: BorderRadius.circular(12)),
+          filled: true,
         ),
-        filled: true,
       ),
     );
   }
 
   // SAR Red theme (Emergency/Alert tones)
   static ThemeData get sarRedTheme {
-    return ThemeData(
-      useMaterial3: true,
-      colorScheme: const ColorScheme.dark(
-        brightness: Brightness.dark,
-        primary: Color(0xFFFF5252), // Bright red
-        onPrimary: Color(0xFF000000),
-        primaryContainer: Color(0xFF8B0000), // Dark red
-        onPrimaryContainer: Color(0xFFFFCDD2),
-        secondary: Color(0xFFFF8A80),
-        onSecondary: Color(0xFF000000),
-        secondaryContainer: Color(0xFFB71C1C),
-        onSecondaryContainer: Color(0xFFFFCDD2),
-        tertiary: Color(0xFFFF6E40),
-        onTertiary: Color(0xFF000000),
-        error: Color(0xFFCF6679),
-        onError: Color(0xFF000000),
-        surface: Color(0xFF1A0000), // Very dark red-tinted
-        onSurface: Color(0xFFFFEBEE),
-        surfaceContainerHighest: Color(0xFF2D0000),
-        onSurfaceVariant: Color(0xFFFFCDD2),
-        outline: Color(0xFFFF5252),
-      ),
-      scaffoldBackgroundColor: const Color(0xFF1A0000),
-      appBarTheme: const AppBarTheme(
-        centerTitle: true,
-        elevation: 0,
-        backgroundColor: Color(0xFF2D0000),
-        foregroundColor: Color(0xFFFFEBEE),
-      ),
-      cardTheme: CardThemeData(
-        elevation: 2,
-        color: const Color(0xFF2D0000),
-        shape: RoundedRectangleBorder(
-          borderRadius: BorderRadius.circular(12),
-          side: const BorderSide(
-            color: Color(0xFFFF5252),
-            width: 1,
+    return _withSharedControls(
+      ThemeData(
+        useMaterial3: true,
+        colorScheme: const ColorScheme.dark(
+          brightness: Brightness.dark,
+          primary: Color(0xFFFF5252), // Bright red
+          onPrimary: Color(0xFF000000),
+          primaryContainer: Color(0xFF8B0000), // Dark red
+          onPrimaryContainer: Color(0xFFFFCDD2),
+          secondary: Color(0xFFFF8A80),
+          onSecondary: Color(0xFF000000),
+          secondaryContainer: Color(0xFFB71C1C),
+          onSecondaryContainer: Color(0xFFFFCDD2),
+          tertiary: Color(0xFFFF6E40),
+          onTertiary: Color(0xFF000000),
+          error: Color(0xFFCF6679),
+          onError: Color(0xFF000000),
+          surface: Color(0xFF1A0000), // Very dark red-tinted
+          onSurface: Color(0xFFFFEBEE),
+          surfaceContainerHighest: Color(0xFF2D0000),
+          onSurfaceVariant: Color(0xFFFFCDD2),
+          outline: Color(0xFFFF5252),
+        ),
+        scaffoldBackgroundColor: const Color(0xFF1A0000),
+        appBarTheme: const AppBarTheme(
+          centerTitle: true,
+          elevation: 0,
+          backgroundColor: Color(0xFF2D0000),
+          foregroundColor: Color(0xFFFFEBEE),
+        ),
+        cardTheme: CardThemeData(
+          elevation: 2,
+          color: const Color(0xFF2D0000),
+          shape: RoundedRectangleBorder(
+            borderRadius: BorderRadius.circular(12),
+            side: const BorderSide(color: Color(0xFFFF5252), width: 1),
           ),
         ),
-      ),
-      inputDecorationTheme: InputDecorationTheme(
-        border: OutlineInputBorder(
-          borderRadius: BorderRadius.circular(12),
-          borderSide: const BorderSide(color: Color(0xFFFF5252)),
+        inputDecorationTheme: InputDecorationTheme(
+          border: OutlineInputBorder(
+            borderRadius: BorderRadius.circular(12),
+            borderSide: const BorderSide(color: Color(0xFFFF5252)),
+          ),
+          filled: true,
+          fillColor: const Color(0xFF2D0000),
         ),
-        filled: true,
-        fillColor: const Color(0xFF2D0000),
-      ),
-      elevatedButtonTheme: ElevatedButtonThemeData(
-        style: ElevatedButton.styleFrom(
-          backgroundColor: const Color(0xFFFF5252),
-          foregroundColor: const Color(0xFF000000),
+        elevatedButtonTheme: ElevatedButtonThemeData(
+          style: ElevatedButton.styleFrom(
+            backgroundColor: const Color(0xFFFF5252),
+            foregroundColor: const Color(0xFF000000),
+          ),
         ),
       ),
     );
@@ -125,58 +143,57 @@ class AppTheme {
 
   // SAR Green theme (All Clear/Safe tones)
   static ThemeData get sarGreenTheme {
-    return ThemeData(
-      useMaterial3: true,
-      colorScheme: const ColorScheme.dark(
-        brightness: Brightness.dark,
-        primary: Color(0xFF69F0AE), // Bright green
-        onPrimary: Color(0xFF000000),
-        primaryContainer: Color(0xFF00695C), // Dark teal-green
-        onPrimaryContainer: Color(0xFFB9F6CA),
-        secondary: Color(0xFF64FFDA),
-        onSecondary: Color(0xFF000000),
-        secondaryContainer: Color(0xFF004D40),
-        onSecondaryContainer: Color(0xFFB9F6CA),
-        tertiary: Color(0xFF1DE9B6),
-        onTertiary: Color(0xFF000000),
-        error: Color(0xFFCF6679),
-        onError: Color(0xFF000000),
-        surface: Color(0xFF001A12), // Very dark green-tinted
-        onSurface: Color(0xFFE8F5E9),
-        surfaceContainerHighest: Color(0xFF002D1F),
-        onSurfaceVariant: Color(0xFFB9F6CA),
-        outline: Color(0xFF69F0AE),
-      ),
-      scaffoldBackgroundColor: const Color(0xFF001A12),
-      appBarTheme: const AppBarTheme(
-        centerTitle: true,
-        elevation: 0,
-        backgroundColor: Color(0xFF002D1F),
-        foregroundColor: Color(0xFFE8F5E9),
-      ),
-      cardTheme: CardThemeData(
-        elevation: 2,
-        color: const Color(0xFF002D1F),
-        shape: RoundedRectangleBorder(
-          borderRadius: BorderRadius.circular(12),
-          side: const BorderSide(
-            color: Color(0xFF69F0AE),
-            width: 1,
+    return _withSharedControls(
+      ThemeData(
+        useMaterial3: true,
+        colorScheme: const ColorScheme.dark(
+          brightness: Brightness.dark,
+          primary: Color(0xFF69F0AE), // Bright green
+          onPrimary: Color(0xFF000000),
+          primaryContainer: Color(0xFF00695C), // Dark teal-green
+          onPrimaryContainer: Color(0xFFB9F6CA),
+          secondary: Color(0xFF64FFDA),
+          onSecondary: Color(0xFF000000),
+          secondaryContainer: Color(0xFF004D40),
+          onSecondaryContainer: Color(0xFFB9F6CA),
+          tertiary: Color(0xFF1DE9B6),
+          onTertiary: Color(0xFF000000),
+          error: Color(0xFFCF6679),
+          onError: Color(0xFF000000),
+          surface: Color(0xFF001A12), // Very dark green-tinted
+          onSurface: Color(0xFFE8F5E9),
+          surfaceContainerHighest: Color(0xFF002D1F),
+          onSurfaceVariant: Color(0xFFB9F6CA),
+          outline: Color(0xFF69F0AE),
+        ),
+        scaffoldBackgroundColor: const Color(0xFF001A12),
+        appBarTheme: const AppBarTheme(
+          centerTitle: true,
+          elevation: 0,
+          backgroundColor: Color(0xFF002D1F),
+          foregroundColor: Color(0xFFE8F5E9),
+        ),
+        cardTheme: CardThemeData(
+          elevation: 2,
+          color: const Color(0xFF002D1F),
+          shape: RoundedRectangleBorder(
+            borderRadius: BorderRadius.circular(12),
+            side: const BorderSide(color: Color(0xFF69F0AE), width: 1),
           ),
         ),
-      ),
-      inputDecorationTheme: InputDecorationTheme(
-        border: OutlineInputBorder(
-          borderRadius: BorderRadius.circular(12),
-          borderSide: const BorderSide(color: Color(0xFF69F0AE)),
+        inputDecorationTheme: InputDecorationTheme(
+          border: OutlineInputBorder(
+            borderRadius: BorderRadius.circular(12),
+            borderSide: const BorderSide(color: Color(0xFF69F0AE)),
+          ),
+          filled: true,
+          fillColor: const Color(0xFF002D1F),
         ),
-        filled: true,
-        fillColor: const Color(0xFF002D1F),
-      ),
-      elevatedButtonTheme: ElevatedButtonThemeData(
-        style: ElevatedButton.styleFrom(
-          backgroundColor: const Color(0xFF69F0AE),
-          foregroundColor: const Color(0xFF000000),
+        elevatedButtonTheme: ElevatedButtonThemeData(
+          style: ElevatedButton.styleFrom(
+            backgroundColor: const Color(0xFF69F0AE),
+            foregroundColor: const Color(0xFF000000),
+          ),
         ),
       ),
     );
@@ -184,58 +201,57 @@ class AppTheme {
 
   // SAR Navy Blue theme (Professional/Operations tones)
   static ThemeData get sarNavyBlueTheme {
-    return ThemeData(
-      useMaterial3: true,
-      colorScheme: const ColorScheme.dark(
-        brightness: Brightness.dark,
-        primary: Color(0xFF5C9FFF), // Bright navy blue
-        onPrimary: Color(0xFF000000),
-        primaryContainer: Color(0xFF003366), // Dark navy
-        onPrimaryContainer: Color(0xFFBBDEFF),
-        secondary: Color(0xFF80B3FF),
-        onSecondary: Color(0xFF000000),
-        secondaryContainer: Color(0xFF002244),
-        onSecondaryContainer: Color(0xFFBBDEFF),
-        tertiary: Color(0xFF4DB8FF),
-        onTertiary: Color(0xFF000000),
-        error: Color(0xFFCF6679),
-        onError: Color(0xFF000000),
-        surface: Color(0xFF00111C), // Very dark blue-tinted
-        onSurface: Color(0xFFE3F2FD),
-        surfaceContainerHighest: Color(0xFF001A2D),
-        onSurfaceVariant: Color(0xFFBBDEFF),
-        outline: Color(0xFF5C9FFF),
-      ),
-      scaffoldBackgroundColor: const Color(0xFF00111C),
-      appBarTheme: const AppBarTheme(
-        centerTitle: true,
-        elevation: 0,
-        backgroundColor: Color(0xFF001A2D),
-        foregroundColor: Color(0xFFE3F2FD),
-      ),
-      cardTheme: CardThemeData(
-        elevation: 2,
-        color: const Color(0xFF001A2D),
-        shape: RoundedRectangleBorder(
-          borderRadius: BorderRadius.circular(12),
-          side: const BorderSide(
-            color: Color(0xFF5C9FFF),
-            width: 1,
+    return _withSharedControls(
+      ThemeData(
+        useMaterial3: true,
+        colorScheme: const ColorScheme.dark(
+          brightness: Brightness.dark,
+          primary: Color(0xFF5C9FFF), // Bright navy blue
+          onPrimary: Color(0xFF000000),
+          primaryContainer: Color(0xFF003366), // Dark navy
+          onPrimaryContainer: Color(0xFFBBDEFF),
+          secondary: Color(0xFF80B3FF),
+          onSecondary: Color(0xFF000000),
+          secondaryContainer: Color(0xFF002244),
+          onSecondaryContainer: Color(0xFFBBDEFF),
+          tertiary: Color(0xFF4DB8FF),
+          onTertiary: Color(0xFF000000),
+          error: Color(0xFFCF6679),
+          onError: Color(0xFF000000),
+          surface: Color(0xFF00111C), // Very dark blue-tinted
+          onSurface: Color(0xFFE3F2FD),
+          surfaceContainerHighest: Color(0xFF001A2D),
+          onSurfaceVariant: Color(0xFFBBDEFF),
+          outline: Color(0xFF5C9FFF),
+        ),
+        scaffoldBackgroundColor: const Color(0xFF00111C),
+        appBarTheme: const AppBarTheme(
+          centerTitle: true,
+          elevation: 0,
+          backgroundColor: Color(0xFF001A2D),
+          foregroundColor: Color(0xFFE3F2FD),
+        ),
+        cardTheme: CardThemeData(
+          elevation: 2,
+          color: const Color(0xFF001A2D),
+          shape: RoundedRectangleBorder(
+            borderRadius: BorderRadius.circular(12),
+            side: const BorderSide(color: Color(0xFF5C9FFF), width: 1),
           ),
         ),
-      ),
-      inputDecorationTheme: InputDecorationTheme(
-        border: OutlineInputBorder(
-          borderRadius: BorderRadius.circular(12),
-          borderSide: const BorderSide(color: Color(0xFF5C9FFF)),
+        inputDecorationTheme: InputDecorationTheme(
+          border: OutlineInputBorder(
+            borderRadius: BorderRadius.circular(12),
+            borderSide: const BorderSide(color: Color(0xFF5C9FFF)),
+          ),
+          filled: true,
+          fillColor: const Color(0xFF001A2D),
         ),
-        filled: true,
-        fillColor: const Color(0xFF001A2D),
-      ),
-      elevatedButtonTheme: ElevatedButtonThemeData(
-        style: ElevatedButton.styleFrom(
-          backgroundColor: const Color(0xFF5C9FFF),
-          foregroundColor: const Color(0xFF000000),
+        elevatedButtonTheme: ElevatedButtonThemeData(
+          style: ElevatedButton.styleFrom(
+            backgroundColor: const Color(0xFF5C9FFF),
+            foregroundColor: const Color(0xFF000000),
+          ),
         ),
       ),
     );

lib/utils/contact_grouping.dart

@@ -4,54 +4,98 @@ class InferredContactGroup {
   final String key;
   final String label;
   final List<Contact> contacts;
+  final List<String> matchPrefixes;
 
   const InferredContactGroup({
     required this.key,
     required this.label,
     required this.contacts,
-  });
+    List<String>? matchPrefixes,
+  }) : matchPrefixes = matchPrefixes ?? const <String>[];
 
   DateTime get latestSeen => contacts.first.lastSeenTime;
 }
 
-class ContactListItem {
-  final Contact? contact;
-  final InferredContactGroup? group;
-
-  const ContactListItem._({this.contact, this.group});
-
-  const ContactListItem.contact(Contact contact) : this._(contact: contact);
-
-  const ContactListItem.group(InferredContactGroup group)
-    : this._(group: group);
-
-  bool get isGroup => group != null;
-
-  DateTime get latestSeen => group?.latestSeen ?? contact!.lastSeenTime;
-}
-
 class ContactGrouping {
   static final RegExp _prefixedNamePattern = RegExp(
     r'^([A-Za-z0-9]{2,})([-_/:])',
   );
 
+  static String? inferredGroupLabelForContact(Contact contact) {
+    return _extractPrefix(contact.displayName)?.label;
+  }
+
+  static bool contactMatchesInferredGroupLabel(Contact contact, String query) {
+    final normalizedQuery = query.trim().toLowerCase();
+    if (normalizedQuery.isEmpty) {
+      return false;
+    }
+
+    final groupLabel = inferredGroupLabelForContact(contact)?.toLowerCase();
+    return groupLabel?.contains(normalizedQuery) ?? false;
+  }
+
+  static String? sharedInferredGroupLabel(List<Contact> contacts) {
+    String? sharedLabel;
+    for (final contact in contacts) {
+      final label = inferredGroupLabelForContact(contact);
+      if (label == null) {
+        return null;
+      }
+      if (sharedLabel == null) {
+        sharedLabel = label;
+        continue;
+      }
+      if (sharedLabel != label) {
+        return null;
+      }
+    }
+    return sharedLabel;
+  }
+
+  static String? sharedParentGroupLabel(List<String> labels) {
+    if (labels.isEmpty) {
+      return null;
+    }
+
+    var commonPrefix = labels.first;
+    for (final label in labels.skip(1)) {
+      final maxLength = commonPrefix.length < label.length
+          ? commonPrefix.length
+          : label.length;
+      var matchLength = 0;
+      while (matchLength < maxLength &&
+          commonPrefix.codeUnitAt(matchLength) ==
+              label.codeUnitAt(matchLength)) {
+        matchLength++;
+      }
+      commonPrefix = commonPrefix.substring(0, matchLength);
+      if (commonPrefix.isEmpty) {
+        return null;
+      }
+    }
+
+    final separatorIndex = commonPrefix.lastIndexOf(RegExp(r'[-_/:]'));
+    if (separatorIndex < 1) {
+      return null;
+    }
+
+    final parentLabel = commonPrefix.substring(0, separatorIndex + 1);
+    return parentLabel.length >= 3 ? parentLabel : null;
+  }
+
   static List<Contact> sortByLastSeen(List<Contact> contacts) {
     return List<Contact>.from(contacts)
       ..sort((a, b) => b.lastSeenTime.compareTo(a.lastSeenTime));
   }
 
-  static List<ContactListItem> buildItems(
+  static List<InferredContactGroup> inferGroups(
     List<Contact> contacts, {
     int minGroupSize = 4,
+    int? maxNamedGroups,
+    String? overflowGroupLabel,
   }) {
     final sortedContacts = sortByLastSeen(contacts);
-    return buildItemsFromSorted(sortedContacts, minGroupSize: minGroupSize);
-  }
-
-  static List<ContactListItem> buildItemsFromSorted(
-    List<Contact> sortedContacts, {
-    int minGroupSize = 4,
-  }) {
     final groupedContacts = <String, List<Contact>>{};
     final groupLabels = <String, String>{};
 
@@ -62,32 +106,46 @@ class ContactGrouping {
       groupLabels.putIfAbsent(prefix.key, () => prefix.label);
     }
 
-    final eligibleGroups = <String, InferredContactGroup>{};
+    final rankedGroups = <InferredContactGroup>[];
     for (final entry in groupedContacts.entries) {
       if (entry.value.length < minGroupSize) continue;
-      eligibleGroups[entry.key] = InferredContactGroup(
-        key: entry.key,
-        label: groupLabels[entry.key] ?? entry.key,
-        contacts: entry.value,
+      rankedGroups.add(
+        InferredContactGroup(
+          key: entry.key,
+          label: groupLabels[entry.key] ?? entry.key,
+          contacts: entry.value,
+          matchPrefixes: [groupLabels[entry.key] ?? entry.key],
+        ),
       );
     }
+    rankedGroups.sort((a, b) => b.latestSeen.compareTo(a.latestSeen));
 
-    final emittedGroups = <String>{};
-    final items = <ContactListItem>[];
+    if (maxNamedGroups != null &&
+        overflowGroupLabel != null &&
+        rankedGroups.length > maxNamedGroups) {
+      final retainedGroups = rankedGroups.take(maxNamedGroups).toList();
+      final overflowGroups = rankedGroups.skip(maxNamedGroups).toList();
+      final parentLabel = sharedParentGroupLabel([
+        for (final group in overflowGroups) ...group.matchPrefixes,
+      ]);
+      if (parentLabel != null) {
+        final overflowContacts = overflowGroups
+            .expand((group) => group.contacts)
+            .toList();
+        return [
+          ...retainedGroups,
+          InferredContactGroup(
+            key: parentLabel,
+            label: parentLabel,
+            contacts: sortByLastSeen(overflowContacts),
+            matchPrefixes: [parentLabel],
+          ),
+        ];
+      }
 
-    for (final contact in sortedContacts) {
-      final prefix = _extractPrefix(contact.displayName);
-      final group = prefix == null ? null : eligibleGroups[prefix.key];
-      if (group == null) {
-        items.add(ContactListItem.contact(contact));
-        continue;
-      }
-      if (emittedGroups.add(group.key)) {
-        items.add(ContactListItem.group(group));
-      }
+      return rankedGroups;
     }
-
-    return items;
+    return rankedGroups;
   }
 
   static _GroupPrefix? _extractPrefix(String name) {

lib/utils/log_rx_route_decoder.dart

@@ -30,6 +30,8 @@ class ResolvedNodeHash {
   final bool isOwnNode;
   final bool isUniqueMatch;
   final int matchCount;
+  final double? latitude;
+  final double? longitude;
 
   const ResolvedNodeHash({
     required this.hashHex,
@@ -37,6 +39,8 @@ class ResolvedNodeHash {
     required this.isOwnNode,
     required this.isUniqueMatch,
     required this.matchCount,
+    this.latitude,
+    this.longitude,
   });
 
   String get hexLabel => '0x${hashHex.toUpperCase()}';
@@ -154,11 +158,33 @@ class LogRxRouteDecoder {
     return hops;
   }
 
+  static List<int> reverseHopBytes(
+    List<int> pathBytes, {
+    required int hashSize,
+  }) {
+    if (pathBytes.isEmpty) return const [];
+    if (hashSize < 1 || hashSize > 3 || pathBytes.length % hashSize != 0) {
+      return List<int>.from(pathBytes.reversed);
+    }
+
+    final reversed = <int>[];
+    for (
+      var index = pathBytes.length - hashSize;
+      index >= 0;
+      index -= hashSize
+    ) {
+      reversed.addAll(pathBytes.sublist(index, index + hashSize));
+    }
+    return reversed;
+  }
+
   static ResolvedNodeHash resolveHash(
     String hashHex, {
     required Iterable<Contact> contacts,
     Uint8List? ownPublicKey,
     String? ownName,
+    double? ownLatitude,
+    double? ownLongitude,
   }) {
     final normalizedHashHex = hashHex.toLowerCase();
     final ownKeyHex = _bytesToHex(ownPublicKey);
@@ -172,6 +198,8 @@ class LogRxRouteDecoder {
         isOwnNode: true,
         isUniqueMatch: true,
         matchCount: 1,
+        latitude: ownLatitude,
+        longitude: ownLongitude,
       );
     }
 
@@ -190,12 +218,15 @@ class LogRxRouteDecoder {
     }
 
     if (matches.length == 1) {
+      final location = matches.first.displayLocation;
       return ResolvedNodeHash(
         hashHex: normalizedHashHex,
         label: matches.first.displayName,
         isOwnNode: false,
         isUniqueMatch: true,
         matchCount: 1,
+        latitude: location?.latitude,
+        longitude: location?.longitude,
       );
     }
 

lib/utils/message_extensions.dart

@@ -9,14 +9,16 @@ extension MessageLocalization on Message {
   /// Get localized delivery status text
   String getLocalizedDeliveryStatus(BuildContext context) {
     final l10n = AppLocalizations.of(context)!;
-    final routeMetadata = context
-        .read<MessagesProvider>()
-        .getMessageRouteMetadata(id);
+    final messagesProvider = context.read<MessagesProvider>();
+    final routeMetadata = messagesProvider.getMessageRouteMetadata(id);
 
     // For channel messages, show echo count instead of delivery status
     if (isChannelMessage && deliveryStatus == MessageDeliveryStatus.sent) {
       final latestMeta = _formatEchoMeta(context);
       if (echoCount == 0) {
+        if (messagesProvider.hasChannelSendWarning(id)) {
+          return 'Broadcast may have failed';
+        }
         return l10n.broadcast; // "Broadcast (no echoes yet)"
       } else if (echoCount == 1) {
         return latestMeta == null ? '1 node' : '1 node • $latestMeta';

lib/utils/trace_node_resolver.dart

@@ -0,0 +1,239 @@
+import 'package:latlong2/latlong.dart';
+
+import '../services/mesh_map_nodes_service.dart';
+
+class ResolvedTraceNode {
+  final List<MeshMapNode> candidates;
+  final int matchCount;
+  final bool usedOnlineFallback;
+  final int selectedIndex;
+
+  const ResolvedTraceNode({
+    required this.candidates,
+    required this.matchCount,
+    required this.usedOnlineFallback,
+    this.selectedIndex = 0,
+  });
+
+  MeshMapNode? get node =>
+      candidates.isEmpty ? null : candidates[selectedIndex];
+  bool get hasMatch => node != null;
+  bool get isAmbiguous => matchCount > 1;
+  bool get canCycle => candidates.length > 1;
+
+  String? get matchSummary {
+    if (matchCount <= 1) return null;
+    final source = usedOnlineFallback ? 'online' : 'local';
+    return '$matchCount $source matches';
+  }
+
+  String? get cycleSummary =>
+      canCycle ? 'tap to cycle ${selectedIndex + 1}/$matchCount' : null;
+
+  ResolvedTraceNode cycle() {
+    if (!canCycle) return this;
+    return ResolvedTraceNode(
+      candidates: candidates,
+      matchCount: matchCount,
+      usedOnlineFallback: usedOnlineFallback,
+      selectedIndex: (selectedIndex + 1) % candidates.length,
+    );
+  }
+}
+
+class TraceNodeResolver {
+  static const Distance _distance = Distance();
+
+  const TraceNodeResolver._();
+
+  static ResolvedTraceNode resolveBest({
+    required List<MeshMapNode> nodes,
+    required Set<String> localPublicKeys,
+    required String? prefixHex,
+    LatLng? referenceA,
+    LatLng? referenceB,
+    String? preferredPrefix,
+  }) {
+    if (prefixHex == null || prefixHex.isEmpty) {
+      return const ResolvedTraceNode(
+        candidates: <MeshMapNode>[],
+        matchCount: 0,
+        usedOnlineFallback: false,
+      );
+    }
+
+    final allMatches = nodes
+        .where((n) => n.publicKey.startsWith(prefixHex))
+        .toList();
+    if (allMatches.isEmpty) {
+      return const ResolvedTraceNode(
+        candidates: <MeshMapNode>[],
+        matchCount: 0,
+        usedOnlineFallback: false,
+      );
+    }
+
+    final localMatches = allMatches
+        .where((node) => localPublicKeys.contains(node.publicKey))
+        .toList();
+    var pool = localMatches.isNotEmpty ? localMatches : allMatches;
+    final usedOnlineFallback = localMatches.isEmpty;
+
+    if (preferredPrefix != null && preferredPrefix.isNotEmpty) {
+      final preferredMatches = pool
+          .where((node) => node.publicKey.startsWith(preferredPrefix))
+          .toList();
+      if (preferredMatches.isNotEmpty) {
+        pool = preferredMatches;
+      }
+    }
+
+    pool.sort((a, b) {
+      final distanceCompare =
+          _scoreNode(
+            a,
+            referenceA: referenceA,
+            referenceB: referenceB,
+          ).compareTo(
+            _scoreNode(b, referenceA: referenceA, referenceB: referenceB),
+          );
+      if (distanceCompare != 0) return distanceCompare;
+      return b.updatedAtMs.compareTo(a.updatedAtMs);
+    });
+
+    return ResolvedTraceNode(
+      candidates: List<MeshMapNode>.unmodifiable(pool),
+      matchCount: pool.length,
+      usedOnlineFallback: usedOnlineFallback,
+    );
+  }
+
+  static List<ResolvedTraceNode> alignPathSelections({
+    required List<ResolvedTraceNode> nodes,
+    MeshMapNode? startNode,
+    MeshMapNode? endNode,
+  }) {
+    if (nodes.isEmpty || nodes.any((node) => node.candidates.isEmpty)) {
+      return nodes;
+    }
+
+    final candidateCosts = List.generate(
+      nodes.length,
+      (_) => <double>[],
+      growable: false,
+    );
+    final previousChoice = List.generate(
+      nodes.length,
+      (_) => <int>[],
+      growable: false,
+    );
+
+    for (var i = 0; i < nodes.length; i++) {
+      final currentCandidates = nodes[i].candidates;
+      candidateCosts[i] = List<double>.filled(
+        currentCandidates.length,
+        double.infinity,
+      );
+      previousChoice[i] = List<int>.filled(currentCandidates.length, -1);
+
+      for (var j = 0; j < currentCandidates.length; j++) {
+        final current = currentCandidates[j];
+        if (i == 0) {
+          candidateCosts[i][j] = startNode == null
+              ? 0
+              : _distanceBetweenNodes(startNode, current);
+          continue;
+        }
+
+        final previousCandidates = nodes[i - 1].candidates;
+        for (var k = 0; k < previousCandidates.length; k++) {
+          final candidateCost =
+              candidateCosts[i - 1][k] +
+              _distanceBetweenNodes(previousCandidates[k], current);
+          if (candidateCost < candidateCosts[i][j]) {
+            candidateCosts[i][j] = candidateCost;
+            previousChoice[i][j] = k;
+          }
+        }
+      }
+    }
+
+    var bestLastIndex = 0;
+    var bestLastCost = double.infinity;
+    final lastCandidates = nodes.last.candidates;
+    for (var i = 0; i < lastCandidates.length; i++) {
+      final endCost = endNode == null
+          ? 0
+          : _distanceBetweenNodes(lastCandidates[i], endNode);
+      final totalCost = candidateCosts.last[i] + endCost;
+      if (totalCost < bestLastCost) {
+        bestLastCost = totalCost;
+        bestLastIndex = i;
+      }
+    }
+
+    final selectedIndices = List<int>.filled(nodes.length, 0);
+    selectedIndices[nodes.length - 1] = bestLastIndex;
+    for (var i = nodes.length - 1; i > 0; i--) {
+      selectedIndices[i - 1] = previousChoice[i][selectedIndices[i]];
+    }
+
+    return List<ResolvedTraceNode>.generate(nodes.length, (index) {
+      final resolved = nodes[index];
+      return ResolvedTraceNode(
+        candidates: resolved.candidates,
+        matchCount: resolved.matchCount,
+        usedOnlineFallback: resolved.usedOnlineFallback,
+        selectedIndex: selectedIndices[index],
+      );
+    }, growable: false);
+  }
+
+  static double _scoreNode(
+    MeshMapNode node, {
+    LatLng? referenceA,
+    LatLng? referenceB,
+  }) {
+    final point = LatLng(node.latitude, node.longitude);
+    if (referenceA != null && referenceB != null) {
+      return _distanceToSegmentMeters(point, referenceA, referenceB);
+    }
+    if (referenceA != null) {
+      return _distance.as(LengthUnit.Meter, point, referenceA);
+    }
+    if (referenceB != null) {
+      return _distance.as(LengthUnit.Meter, point, referenceB);
+    }
+    return double.maxFinite;
+  }
+
+  static double _distanceBetweenNodes(MeshMapNode a, MeshMapNode b) {
+    return _distance.as(
+      LengthUnit.Meter,
+      LatLng(a.latitude, a.longitude),
+      LatLng(b.latitude, b.longitude),
+    );
+  }
+
+  static double _distanceToSegmentMeters(LatLng p, LatLng a, LatLng b) {
+    final ax = a.longitude;
+    final ay = a.latitude;
+    final bx = b.longitude;
+    final by = b.latitude;
+    final px = p.longitude;
+    final py = p.latitude;
+
+    final abx = bx - ax;
+    final aby = by - ay;
+    final apx = px - ax;
+    final apy = py - ay;
+    final ab2 = abx * abx + aby * aby;
+    if (ab2 == 0) {
+      return _distance.as(LengthUnit.Meter, a, p);
+    }
+    var t = (apx * abx + apy * aby) / ab2;
+    t = t.clamp(0.0, 1.0);
+    final closest = LatLng(ay + aby * t, ax + abx * t);
+    return _distance.as(LengthUnit.Meter, closest, p);
+  }
+}

lib/utils/voice_message_parser.dart

@@ -11,20 +11,31 @@ const int _defaultLoRaCrcEnabled = 1;
 const int _defaultLoRaExplicitHeader = 1;
 const double _defaultAirtimeBudgetFactor = 1.0; // one half duty-cycle
 
-/// Identifies which Codec2 mode was used for a voice packet.
+/// Identifies which voice codec/mode was used for a packet.
 /// Matches the modeId byte in the text/binary packet header.
 enum VoicePacketMode {
-  mode700c(0, '700C'),
-  mode1200(1, '1200'),
-  mode2400(2, '2400'),
-  mode1300(3, '1300'),
-  mode1400(4, '1400'),
-  mode1600(5, '1600'),
-  mode3200(6, '3200');
+  mode700c(0, '700C', 8000, 100, 1600),
+  mode1200(1, '1200', 8000, 150, 1040),
+  mode2400(2, '2400', 8000, 300, 520),
+  mode1300(3, '1300', 8000, 175, 880),
+  mode1400(4, '1400', 8000, 175, 880),
+  mode1600(5, '1600', 8000, 200, 800),
+  mode3200(6, '3200', 8000, 400, 400);
 
-  const VoicePacketMode(this.id, this.label);
+  const VoicePacketMode(
+    this.id,
+    this.label,
+    this.sampleRateHz,
+    this.bytesPerSecond,
+    this.packetDurationMs,
+  );
   final int id;
   final String label;
+  final int sampleRateHz;
+  final int bytesPerSecond;
+  final int packetDurationMs;
+
+  int get samplesPerPacket => sampleRateHz * packetDurationMs ~/ 1000;
 
   static VoicePacketMode fromId(int id) => VoicePacketMode.values.firstWhere(
     (m) => m.id == id,
@@ -153,23 +164,21 @@ class VoicePacket {
 
   /// Estimated audio duration of this packet in milliseconds.
   int get durationMs {
-    // bytesPerSecond for each mode
-    final bps = switch (mode) {
-      VoicePacketMode.mode700c => 100,
-      VoicePacketMode.mode1200 => 150,
-      VoicePacketMode.mode1300 => 175,
-      VoicePacketMode.mode1400 => 175,
-      VoicePacketMode.mode1600 => 200,
-      VoicePacketMode.mode2400 => 300,
-      VoicePacketMode.mode3200 => 400,
-    };
-    if (bps == 0) return 0;
-    return (codec2Data.length * 1000 ~/ bps).clamp(0, 1500);
+    try {
+      final bytesPerSecond = voiceModeBytesPerSecond(mode);
+      if (bytesPerSecond <= 0) return 0;
+      return (codec2Data.length * 1000 ~/ bytesPerSecond).clamp(0, 1500);
+    } catch (_) {
+      // Be permissive with stale or malformed persisted voice metadata.
+      return 0;
+    }
   }
 
   @override
   String toString() {
-    final suffix = total > 0 ? ' ${mode.label} [$index/${total - 1}]' : ' [$index]';
+    final suffix = total > 0
+        ? ' ${mode.label} [$index/${total - 1}]'
+        : ' [$index]';
     return 'VoicePacket($sessionId$suffix ${codec2Data.length}B)';
   }
 }
@@ -244,10 +253,10 @@ class VoiceEnvelope {
 int voiceModeBytesPerSecond(VoicePacketMode mode) => switch (mode) {
   VoicePacketMode.mode700c => 100,
   VoicePacketMode.mode1200 => 150,
+  VoicePacketMode.mode2400 => 300,
   VoicePacketMode.mode1300 => 175,
   VoicePacketMode.mode1400 => 175,
   VoicePacketMode.mode1600 => 200,
-  VoicePacketMode.mode2400 => 300,
   VoicePacketMode.mode3200 => 400,
 };
 
@@ -419,8 +428,7 @@ class VoiceFetchRequest {
     this.version = 3,
   });
 
-  static bool isVoiceFetchRequestText(String text) =>
-      text.startsWith(_prefix);
+  static bool isVoiceFetchRequestText(String text) => text.startsWith(_prefix);
   static bool isVoiceFetchRequestBinary(Uint8List payload) =>
       payload.isNotEmpty && payload[0] == _binaryMagic;
 
@@ -473,9 +481,7 @@ class VoiceFetchRequest {
       final requesterKey6 = parts[2];
       final normalizedWant = wantToken == 'a'
           ? 'all'
-          : ((wantToken.startsWith('m'))
-                ? 'missing'
-                : wantToken);
+          : ((wantToken.startsWith('m')) ? 'missing' : wantToken);
 
       if (sid == null) {
         return null;
@@ -602,7 +608,11 @@ String _toBase36(int value) => value.toRadixString(36);
 
 String _encodeSessionId(String sessionIdHex) {
   if (!RegExp(r'^[0-9a-fA-F]{8}$').hasMatch(sessionIdHex)) {
-    throw ArgumentError.value(sessionIdHex, 'sessionIdHex', 'Expected 8 hex chars');
+    throw ArgumentError.value(
+      sessionIdHex,
+      'sessionIdHex',
+      'Expected 8 hex chars',
+    );
   }
   final value = int.parse(sessionIdHex, radix: 16);
   return value.toRadixString(36);
@@ -616,10 +626,7 @@ String? _decodeSessionId(String token) {
 }
 
 String _encodeMissingIndicesCompact(List<int> indices) {
-  final sorted = indices
-      .where((v) => v >= 0 && v <= 254)
-      .toSet()
-      .toList()
+  final sorted = indices.where((v) => v >= 0 && v <= 254).toSet().toList()
     ..sort();
   if (sorted.isEmpty) return '';
   final chunks = <String>[];
@@ -632,7 +639,9 @@ String _encodeMissingIndicesCompact(List<int> indices) {
       continue;
     }
     chunks.add(
-      start == prev ? _toBase36(start) : '${_toBase36(start)}-${_toBase36(prev)}',
+      start == prev
+          ? _toBase36(start)
+          : '${_toBase36(start)}-${_toBase36(prev)}',
     );
     start = curr;
     prev = curr;

lib/widgets/common/bidirectional_refresh.dart

@@ -0,0 +1,175 @@
+import 'package:flutter/material.dart';
+
+enum _RefreshEdge { top, bottom }
+
+class BidirectionalRefresh extends StatefulWidget {
+  static const double defaultTriggerDistance = 90;
+
+  final Widget child;
+  final Future<void> Function() onRefresh;
+  final double triggerDistance;
+
+  const BidirectionalRefresh({
+    super.key,
+    required this.child,
+    required this.onRefresh,
+    this.triggerDistance = defaultTriggerDistance,
+  });
+
+  @override
+  State<BidirectionalRefresh> createState() => _BidirectionalRefreshState();
+}
+
+class _BidirectionalRefreshState extends State<BidirectionalRefresh> {
+  double _topPullDistance = 0;
+  double _bottomPullDistance = 0;
+  bool _isRefreshing = false;
+
+  bool _handleScrollNotification(ScrollNotification notification) {
+    if (_isRefreshing) {
+      return false;
+    }
+
+    if (notification is ScrollStartNotification) {
+      _resetPullDistance();
+      return false;
+    }
+
+    if (notification is OverscrollNotification) {
+      final metrics = notification.metrics;
+      final isAtTop = metrics.extentBefore == 0;
+      final isAtBottom = metrics.extentAfter == 0;
+
+      if (!isAtTop && !isAtBottom) {
+        return false;
+      }
+
+      var shouldRefresh = false;
+      setState(() {
+        if (isAtTop) {
+          _topPullDistance += notification.overscroll.abs();
+          shouldRefresh = _topPullDistance >= widget.triggerDistance;
+        }
+        if (isAtBottom) {
+          _bottomPullDistance += notification.overscroll.abs();
+          shouldRefresh =
+              shouldRefresh || _bottomPullDistance >= widget.triggerDistance;
+        }
+      });
+      if (shouldRefresh) {
+        _runRefresh();
+      }
+      return false;
+    }
+
+    if (notification is ScrollEndNotification) {
+      _resetPullDistance();
+    }
+
+    return false;
+  }
+
+  Future<void> _runRefresh() async {
+    if (_isRefreshing) {
+      return;
+    }
+
+    setState(() {
+      _isRefreshing = true;
+    });
+
+    try {
+      await widget.onRefresh();
+    } finally {
+      if (mounted) {
+        setState(() {
+          _isRefreshing = false;
+          _topPullDistance = 0;
+          _bottomPullDistance = 0;
+        });
+      }
+    }
+  }
+
+  void _resetPullDistance() {
+    if (_topPullDistance == 0 && _bottomPullDistance == 0) {
+      return;
+    }
+
+    setState(() {
+      _topPullDistance = 0;
+      _bottomPullDistance = 0;
+    });
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    final topProgress = (_topPullDistance / widget.triggerDistance).clamp(
+      0.0,
+      1.0,
+    );
+    final bottomProgress = (_bottomPullDistance / widget.triggerDistance).clamp(
+      0.0,
+      1.0,
+    );
+
+    return NotificationListener<ScrollNotification>(
+      onNotification: _handleScrollNotification,
+      child: Stack(
+        children: [
+          widget.child,
+          _RefreshIndicatorOverlay(
+            alignment: Alignment.topCenter,
+            progress: _isRefreshing ? 1 : topProgress,
+            visible: _isRefreshing || _topPullDistance > 0,
+            edge: _RefreshEdge.top,
+          ),
+          _RefreshIndicatorOverlay(
+            alignment: Alignment.bottomCenter,
+            progress: _isRefreshing ? 1 : bottomProgress,
+            visible: _isRefreshing || _bottomPullDistance > 0,
+            edge: _RefreshEdge.bottom,
+          ),
+        ],
+      ),
+    );
+  }
+}
+
+class _RefreshIndicatorOverlay extends StatelessWidget {
+  final Alignment alignment;
+  final double progress;
+  final bool visible;
+  final _RefreshEdge edge;
+
+  const _RefreshIndicatorOverlay({
+    required this.alignment,
+    required this.progress,
+    required this.visible,
+    required this.edge,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    if (!visible) {
+      return const SizedBox.shrink();
+    }
+
+    final indicator = RefreshProgressIndicator(value: progress);
+    final padding = edge == _RefreshEdge.top
+        ? const EdgeInsets.only(top: 12)
+        : const EdgeInsets.only(bottom: 12);
+
+    return Positioned.fill(
+      child: IgnorePointer(
+        child: Align(
+          alignment: alignment,
+          child: Padding(
+            padding: padding,
+            child: SizedBox.square(dimension: 28, child: indicator),
+          ),
+        ),
+      ),
+    );
+  }
+}

lib/widgets/common/contact_avatar.dart

@@ -108,6 +108,8 @@ class ContactAvatar extends StatelessWidget {
         return Colors.orange;
       case ContactType.room:
         return Colors.purple;
+      case ContactType.sensor:
+        return Colors.green;
       case ContactType.channel:
         return Colors.teal;
     }
@@ -130,6 +132,8 @@ class ContactAvatar extends StatelessWidget {
         return Icons.router;
       case ContactType.room:
         return Icons.meeting_room;
+      case ContactType.sensor:
+        return Icons.sensors;
       case ContactType.channel:
         return Icons.public;
     }

lib/widgets/compact_signal_indicator.dart

@@ -0,0 +1,106 @@
+import 'package:flutter/material.dart';
+import 'package:meshcore_client/meshcore_client.dart' show LogRxDataInfo;
+
+class SignalMetric {
+  final String valueLabel;
+  final Color color;
+  final int activeBars;
+
+  const SignalMetric({
+    required this.valueLabel,
+    required this.color,
+    required this.activeBars,
+  });
+
+  static SignalMetric? fromRxInfo(LogRxDataInfo? rxInfo) {
+    if (rxInfo == null) return null;
+    return fromValues(rssiDbm: rxInfo.rssiDbm, snrDb: rxInfo.snrDb);
+  }
+
+  static SignalMetric? fromValues({int? rssiDbm, double? snrDb}) {
+    if (snrDb != null) {
+      return SignalMetric(
+        valueLabel: '${snrDb.toStringAsFixed(1)}dB',
+        color: snrDb >= 10
+            ? Colors.green
+            : snrDb >= 0
+            ? Colors.amber
+            : Colors.redAccent,
+        activeBars: snrDb >= 10
+            ? 3
+            : snrDb >= 0
+            ? 2
+            : 1,
+      );
+    }
+    if (rssiDbm != null) {
+      return SignalMetric(
+        valueLabel: '$rssiDbm dBm',
+        color: rssiDbm >= -80
+            ? Colors.green
+            : rssiDbm >= -95
+            ? Colors.amber
+            : Colors.redAccent,
+        activeBars: rssiDbm >= -80
+            ? 3
+            : rssiDbm >= -95
+            ? 2
+            : 1,
+      );
+    }
+    return null;
+  }
+}
+
+class CompactSignalIndicator extends StatelessWidget {
+  final SignalMetric metric;
+  final bool dense;
+
+  const CompactSignalIndicator({
+    super.key,
+    required this.metric,
+    this.dense = false,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    final inactive = Theme.of(context).colorScheme.outlineVariant;
+    final barWidth = dense ? 4.0 : 5.0;
+    final baseHeight = dense ? 8.0 : 10.0;
+    final barStep = dense ? 6.0 : 8.0;
+    final barSpacing = dense ? 2.0 : 3.0;
+    final labelGap = dense ? 4.0 : 6.0;
+    final labelFontSize = dense ? 10.0 : 12.0;
+    return Column(
+      crossAxisAlignment: CrossAxisAlignment.center,
+      children: [
+        Row(
+          mainAxisSize: MainAxisSize.min,
+          crossAxisAlignment: CrossAxisAlignment.end,
+          children: [
+            for (var index = 0; index < 3; index++) ...[
+              if (index > 0) SizedBox(width: barSpacing),
+              Container(
+                width: barWidth,
+                height: baseHeight + (index * barStep),
+                decoration: BoxDecoration(
+                  color: index < metric.activeBars ? metric.color : inactive,
+                  borderRadius: BorderRadius.circular(2),
+                ),
+              ),
+            ],
+          ],
+        ),
+        SizedBox(height: labelGap),
+        Text(
+          metric.valueLabel,
+          style: TextStyle(
+            fontSize: labelFontSize,
+            fontWeight: FontWeight.w700,
+            color: Theme.of(context).colorScheme.onSurface,
+          ),
+        ),
+      ],
+    );
+  }
+}

lib/widgets/connection_mode_selector.dart

@@ -1,160 +0,0 @@
-import 'dart:io';
-import 'package:flutter/foundation.dart' show kIsWeb;
-import 'package:flutter/material.dart';
-import 'package:flutter/services.dart';
-import 'package:provider/provider.dart';
-import '../providers/connection_provider.dart';
-import '../models/sse_server_config.dart';
-
-/// Connection Mode Selector Widget
-///
-/// Allows user to enable/disable SSE Server mode to share device with multiple clients
-class ConnectionModeSelector extends StatefulWidget {
-  const ConnectionModeSelector({super.key});
-
-  @override
-  State<ConnectionModeSelector> createState() => _ConnectionModeSelectorState();
-}
-
-class _ConnectionModeSelectorState extends State<ConnectionModeSelector> {
-  List<String> _localIPs = [];
-
-  @override
-  void initState() {
-    super.initState();
-    _loadLocalIPs();
-  }
-
-  Future<void> _loadLocalIPs() async {
-    if (kIsWeb) {
-      return;
-    }
-
-    final Set<String> ipsSet = {};
-
-    try {
-      final interfaces = await NetworkInterface.list();
-      for (final interface in interfaces) {
-        for (final addr in interface.addresses) {
-          if (addr.type == InternetAddressType.IPv4 && !addr.isLoopback) {
-            ipsSet.add(addr.address);
-          }
-        }
-      }
-    } catch (e) {
-      debugPrint('Error getting network interfaces: $e');
-    }
-
-    if (mounted) {
-      setState(() {
-        _localIPs = ipsSet.toList();
-      });
-    }
-  }
-
-  @override
-  void dispose() {
-    super.dispose();
-  }
-
-  @override
-  Widget build(BuildContext context) {
-    final connectionProvider = Provider.of<ConnectionProvider>(context);
-
-    return Column(
-      crossAxisAlignment: CrossAxisAlignment.start,
-      children: [
-        // Section Header
-        Padding(
-          padding: const EdgeInsets.fromLTRB(16, 16, 16, 8),
-          child: Text(
-            'Network Sharing',
-            style: Theme.of(context).textTheme.titleMedium?.copyWith(
-              color: Theme.of(context).colorScheme.primary,
-              fontWeight: FontWeight.bold,
-            ),
-          ),
-        ),
-
-        // SSE Server Toggle
-        SwitchListTile(
-          secondary: const Icon(Icons.share),
-          title: const Text('Share Device (Server)'),
-          subtitle: Text(
-            connectionProvider.isSseServerRunning
-                ? 'Server running on port ${connectionProvider.sseServerConfig.port} - ${connectionProvider.sseClientCount} client(s) connected'
-                : 'Share BLE device with multiple clients over network',
-          ),
-          value: connectionProvider.isSseServerRunning,
-          onChanged: (enabled) async {
-            if (enabled) {
-              // Start server with default config (port 12929, no auth)
-              final config = const SseServerConfig(port: 12929, enabled: true);
-
-              try {
-                await connectionProvider.startSseServer(config);
-                if (context.mounted) {
-                  ScaffoldMessenger.of(context).showSnackBar(
-                    const SnackBar(
-                      content: Text('SSE server started on port 12929'),
-                      backgroundColor: Colors.green,
-                    ),
-                  );
-                }
-              } catch (e) {
-                if (context.mounted) {
-                  ScaffoldMessenger.of(context).showSnackBar(
-                    SnackBar(
-                      content: Text('Failed to start server: $e'),
-                      backgroundColor: Colors.red,
-                    ),
-                  );
-                }
-              }
-            } else {
-              // Stop server
-              await connectionProvider.stopSseServer();
-            }
-          },
-        ),
-
-        // Show IP addresses when server is running
-        if (connectionProvider.isSseServerRunning && _localIPs.isNotEmpty) ...[
-          Padding(
-            padding: const EdgeInsets.fromLTRB(16, 8, 16, 8),
-            child: Text(
-              'Connect from other devices:',
-              style: Theme.of(context).textTheme.titleSmall?.copyWith(
-                color: Theme.of(context).colorScheme.primary,
-              ),
-            ),
-          ),
-          ..._localIPs.map((ip) {
-            final url = 'http://$ip:${connectionProvider.sseServerConfig.port}';
-            return ListTile(
-              dense: true,
-              leading: const Icon(Icons.wifi, size: 20),
-              title: Text(
-                url,
-                style: const TextStyle(fontFamily: 'monospace', fontSize: 13),
-              ),
-              trailing: IconButton(
-                icon: const Icon(Icons.copy, size: 20),
-                tooltip: 'Copy URL',
-                onPressed: () {
-                  Clipboard.setData(ClipboardData(text: url));
-                  ScaffoldMessenger.of(context).showSnackBar(
-                    SnackBar(
-                      content: Text('Copied $url'),
-                      duration: const Duration(seconds: 1),
-                    ),
-                  );
-                },
-              ),
-            );
-          }),
-        ],
-      ],
-    );
-  }
-}

lib/widgets/contacts/add_channel_dialog.dart

@@ -1,20 +1,17 @@
 import 'package:flutter/material.dart';
 import '../../l10n/app_localizations.dart';
 
-/// Dialog for adding a new channel
-class AddChannelDialog extends StatefulWidget {
+/// Bottom sheet for adding a new channel
+class AddChannelSheet extends StatefulWidget {
   final Future<void> Function(String name, String secret) onCreateChannel;
 
-  const AddChannelDialog({
-    super.key,
-    required this.onCreateChannel,
-  });
+  const AddChannelSheet({super.key, required this.onCreateChannel});
 
   @override
-  State<AddChannelDialog> createState() => _AddChannelDialogState();
+  State<AddChannelSheet> createState() => _AddChannelSheetState();
 }
 
-class _AddChannelDialogState extends State<AddChannelDialog> {
+class _AddChannelSheetState extends State<AddChannelSheet> {
   final _formKey = GlobalKey<FormState>();
   final _nameController = TextEditingController();
   final _secretController = TextEditingController();
@@ -84,7 +81,7 @@ class _AddChannelDialogState extends State<AddChannelDialog> {
     try {
       final channelName = _nameController.text.trim();
       final isHashChannel = channelName.startsWith('#');
-      
+
       // For hash channels, pass empty secret (will be auto-generated)
       // For private channels, use the provided secret
       final secret = isHashChannel ? '' : _secretController.text;
@@ -109,152 +106,183 @@ class _AddChannelDialogState extends State<AddChannelDialog> {
     final normalizedName = _nameController.text.trimLeft();
     final isHashChannel = normalizedName.startsWith('#');
 
-    return AlertDialog(
-      title: Text(l10n.addChannel),
-      content: SingleChildScrollView(
-        child: Form(
-          key: _formKey,
-          child: Column(
-            mainAxisSize: MainAxisSize.min,
-            crossAxisAlignment: CrossAxisAlignment.start,
-            children: [
-              // Info banner explaining channel types
-              Container(
-                padding: const EdgeInsets.all(12),
-                decoration: BoxDecoration(
-                  color: theme.colorScheme.primaryContainer.withValues(alpha: 0.3),
-                  borderRadius: BorderRadius.circular(8),
-                  border: Border.all(
-                    color: theme.colorScheme.primary.withValues(alpha: 0.3),
-                  ),
-                ),
-                child: Row(
-                  crossAxisAlignment: CrossAxisAlignment.start,
+    return ConstrainedBox(
+      constraints: BoxConstraints(
+        maxHeight: MediaQuery.of(context).size.height * 0.85,
+      ),
+      child: SingleChildScrollView(
+        child: Padding(
+          padding: const EdgeInsets.fromLTRB(20, 8, 20, 20),
+          child: Form(
+            key: _formKey,
+            child: Column(
+              mainAxisSize: MainAxisSize.min,
+              crossAxisAlignment: CrossAxisAlignment.start,
+              children: [
+                Row(
                   children: [
-                    Icon(
-                      Icons.info_outline,
-                      size: 20,
-                      color: theme.colorScheme.primary,
-                    ),
-                    const SizedBox(width: 8),
                     Expanded(
                       child: Text(
-                        l10n.channelTypesInfo,
-                        style: theme.textTheme.bodySmall?.copyWith(
-                          color: theme.colorScheme.onSurfaceVariant,
+                        l10n.addChannel,
+                        style: theme.textTheme.titleLarge?.copyWith(
+                          fontWeight: FontWeight.w700,
                         ),
                       ),
                     ),
+                    IconButton(
+                      onPressed: _isCreating
+                          ? null
+                          : () => Navigator.of(context).pop(),
+                      icon: const Icon(Icons.close),
+                      tooltip: l10n.close,
+                    ),
                   ],
                 ),
-              ),
-              const SizedBox(height: 16),
-
-              // Channel Name Field
-              TextFormField(
-                controller: _nameController,
-                decoration: InputDecoration(
-                  labelText: l10n.channelName,
-                  hintText: l10n.channelNameHint,
-                  border: const OutlineInputBorder(),
-                  prefixIcon: Icon(
-                    isHashChannel ? Icons.tag : Icons.lock_outline,
-                    color: isHashChannel ? Colors.blue : Colors.orange,
-                  ),
-                ),
-                enabled: !_isCreating,
-                maxLength: 31,
-                validator: _validateName,
-                textInputAction: isHashChannel
-                    ? TextInputAction.done
-                    : TextInputAction.next,
-                onChanged: (_) => setState(() {}), // Rebuild to update icon
-                onFieldSubmitted: (_) {
-                  if (isHashChannel) {
-                    _handleCreate();
-                  }
-                },
-              ),
-              // Channel Secret Field (only show for private channels)
-              if (!isHashChannel) ...[
-                const SizedBox(height: 16),
-                TextFormField(
-                  controller: _secretController,
-                  decoration: InputDecoration(
-                    labelText: l10n.channelSecret,
-                    hintText: l10n.channelSecretHint,
-                    border: const OutlineInputBorder(),
-                  ),
-                  obscureText: true,
-                  enabled: !_isCreating,
-                  maxLength: 32,
-                  validator: _validateSecret,
-                  textInputAction: TextInputAction.done,
-                  onFieldSubmitted: (_) => _handleCreate(),
-                ),
-                const SizedBox(height: 8),
-                // Help Text for private channels
-                Text(
-                  l10n.channelSecretHelp,
-                  style: theme.textTheme.bodySmall?.copyWith(
-                    color: theme.colorScheme.onSurfaceVariant,
-                  ),
-                ),
-              ],
-
-              // Help Text for hash channels
-              if (isHashChannel) ...[
                 const SizedBox(height: 8),
                 Container(
                   padding: const EdgeInsets.all(12),
                   decoration: BoxDecoration(
-                    color: theme.colorScheme.primaryContainer.withValues(alpha: 0.5),
-                    borderRadius: BorderRadius.circular(8),
+                    color: theme.colorScheme.primaryContainer.withValues(
+                      alpha: 0.3,
+                    ),
+                    borderRadius: BorderRadius.circular(12),
+                    border: Border.all(
+                      color: theme.colorScheme.primary.withValues(alpha: 0.3),
+                    ),
                   ),
                   child: Row(
+                    crossAxisAlignment: CrossAxisAlignment.start,
                     children: [
-                      const Icon(
-                        Icons.auto_awesome,
+                      Icon(
+                        Icons.info_outline,
                         size: 20,
-                        color: Colors.blue,
+                        color: theme.colorScheme.primary,
                       ),
                       const SizedBox(width: 8),
                       Expanded(
                         child: Text(
-                          l10n.hashChannelInfo,
+                          l10n.channelTypesInfo,
                           style: theme.textTheme.bodySmall?.copyWith(
-                            color: theme.colorScheme.primary,
-                            fontWeight: FontWeight.w500,
+                            color: theme.colorScheme.onSurfaceVariant,
                           ),
                         ),
                       ),
                     ],
                   ),
                 ),
+                const SizedBox(height: 16),
+                TextFormField(
+                  controller: _nameController,
+                  decoration: InputDecoration(
+                    labelText: l10n.channelName,
+                    hintText: l10n.channelNameHint,
+                    border: const OutlineInputBorder(),
+                    prefixIcon: Icon(
+                      isHashChannel ? Icons.tag : Icons.lock_outline,
+                      color: isHashChannel ? Colors.blue : Colors.orange,
+                    ),
+                  ),
+                  enabled: !_isCreating,
+                  maxLength: 31,
+                  validator: _validateName,
+                  textInputAction: isHashChannel
+                      ? TextInputAction.done
+                      : TextInputAction.next,
+                  onChanged: (_) => setState(() {}),
+                  onFieldSubmitted: (_) {
+                    if (isHashChannel) {
+                      _handleCreate();
+                    }
+                  },
+                ),
+                if (!isHashChannel) ...[
+                  const SizedBox(height: 16),
+                  TextFormField(
+                    controller: _secretController,
+                    decoration: InputDecoration(
+                      labelText: l10n.channelSecret,
+                      hintText: l10n.channelSecretHint,
+                      border: const OutlineInputBorder(),
+                    ),
+                    obscureText: true,
+                    enabled: !_isCreating,
+                    maxLength: 32,
+                    validator: _validateSecret,
+                    textInputAction: TextInputAction.done,
+                    onFieldSubmitted: (_) => _handleCreate(),
+                  ),
+                  const SizedBox(height: 8),
+                  Text(
+                    l10n.channelSecretHelp,
+                    style: theme.textTheme.bodySmall?.copyWith(
+                      color: theme.colorScheme.onSurfaceVariant,
+                    ),
+                  ),
+                ],
+                if (isHashChannel) ...[
+                  const SizedBox(height: 8),
+                  Container(
+                    padding: const EdgeInsets.all(12),
+                    decoration: BoxDecoration(
+                      color: theme.colorScheme.primaryContainer.withValues(
+                        alpha: 0.5,
+                      ),
+                      borderRadius: BorderRadius.circular(12),
+                    ),
+                    child: Row(
+                      children: [
+                        const Icon(
+                          Icons.auto_awesome,
+                          size: 20,
+                          color: Colors.blue,
+                        ),
+                        const SizedBox(width: 8),
+                        Expanded(
+                          child: Text(
+                            l10n.hashChannelInfo,
+                            style: theme.textTheme.bodySmall?.copyWith(
+                              color: theme.colorScheme.primary,
+                              fontWeight: FontWeight.w500,
+                            ),
+                          ),
+                        ),
+                      ],
+                    ),
+                  ),
+                ],
+                const SizedBox(height: 20),
+                Row(
+                  children: [
+                    Expanded(
+                      child: OutlinedButton(
+                        onPressed: _isCreating
+                            ? null
+                            : () => Navigator.of(context).pop(),
+                        child: Text(l10n.cancel),
+                      ),
+                    ),
+                    const SizedBox(width: 12),
+                    Expanded(
+                      child: FilledButton(
+                        onPressed: _isCreating ? null : _handleCreate,
+                        child: _isCreating
+                            ? const SizedBox(
+                                width: 16,
+                                height: 16,
+                                child: CircularProgressIndicator(
+                                  strokeWidth: 2,
+                                ),
+                              )
+                            : Text(l10n.createChannel),
+                      ),
+                    ),
+                  ],
+                ),
               ],
-            ],
+            ),
           ),
         ),
       ),
-      actions: [
-        // Cancel Button
-        TextButton(
-          onPressed: _isCreating ? null : () => Navigator.of(context).pop(),
-          child: Text(l10n.cancel),
-        ),
-
-        // Create Button
-        FilledButton(
-          onPressed: _isCreating ? null : _handleCreate,
-          child: _isCreating
-              ? const SizedBox(
-                  width: 16,
-                  height: 16,
-                  child: CircularProgressIndicator(strokeWidth: 2),
-                )
-              : Text(l10n.createChannel),
-        ),
-      ],
     );
   }
 }

lib/widgets/contacts/contact_tile.dart

@@ -13,13 +13,17 @@ import '../../providers/messages_provider.dart';
 import '../../providers/sensors_provider.dart';
 import '../../services/message_destination_preferences.dart';
 import 'contact_route_dialog.dart';
+import 'contact_trace_sheet.dart';
 import 'room_login_sheet.dart';
 import '../common/contact_avatar.dart';
+import '../sensors/sensor_telemetry_card.dart';
 import '../../utils/toast_logger.dart';
 import '../../l10n/app_localizations.dart';
 
 class ContactTile extends StatelessWidget {
   final Contact contact;
+  final String? groupLabel;
+  final bool compact;
   final Position? currentPosition;
   final double Function(double, double, double, double)? calculateDistance;
   final String Function(double)? formatDistance;
@@ -29,6 +33,8 @@ class ContactTile extends StatelessWidget {
   const ContactTile({
     super.key,
     required this.contact,
+    this.groupLabel,
+    this.compact = false,
     this.currentPosition,
     this.calculateDistance,
     this.formatDistance,
@@ -124,31 +130,46 @@ class ContactTile extends StatelessWidget {
           : colorScheme.onSurfaceVariant,
       fontWeight: FontWeight.w600,
     );
-    final Widget subtitleWidget = Column(
-      crossAxisAlignment: CrossAxisAlignment.start,
-      children: [
-        if (location != null) ...[
-          const SizedBox(height: 2),
-          _buildLocationLine(
-            context,
-            latitude: location.latitude,
-            longitude: location.longitude,
-            distanceText: distanceText,
-          ),
-          const SizedBox(height: 6),
-          Row(children: [_buildRoutePill(context, contact)]),
-        ] else
-          Padding(
-            padding: const EdgeInsets.only(top: 4),
-            child: Text(
-              AppLocalizations.of(context)!.noGpsData,
-              style: Theme.of(
-                context,
-              ).textTheme.labelSmall?.copyWith(color: Colors.grey),
-            ),
-          ),
-      ],
-    );
+    final Widget subtitleWidget = compact
+        ? _buildCompactSubtitle(context, distanceText)
+        : Column(
+            crossAxisAlignment: CrossAxisAlignment.start,
+            children: [
+              const SizedBox(height: 4),
+              Wrap(
+                spacing: 6,
+                runSpacing: 6,
+                children: [
+                  if (groupLabel case final label?)
+                    _buildMetaPill(
+                      context,
+                      icon: Icons.folder_copy_outlined,
+                      label: label,
+                    ),
+                ],
+              ),
+              if (location != null) ...[
+                const SizedBox(height: 2),
+                _buildLocationLine(
+                  context,
+                  latitude: location.latitude,
+                  longitude: location.longitude,
+                  distanceText: distanceText,
+                ),
+                const SizedBox(height: 6),
+                Row(children: [_buildRoutePill(context, contact)]),
+              ] else
+                Padding(
+                  padding: const EdgeInsets.only(top: 4),
+                  child: Text(
+                    AppLocalizations.of(context)!.noGpsData,
+                    style: Theme.of(
+                      context,
+                    ).textTheme.labelSmall?.copyWith(color: Colors.grey),
+                  ),
+                ),
+            ],
+          );
 
     return Container(
       margin: const EdgeInsets.only(bottom: 8),
@@ -272,6 +293,28 @@ class ContactTile extends StatelessWidget {
     );
   }
 
+  Widget _buildCompactSubtitle(BuildContext context, String? distanceText) {
+    final location = contact.displayLocation;
+    final compactPills = <Widget>[
+      if (groupLabel case final label?)
+        _buildMetaPill(context, icon: Icons.folder_copy_outlined, label: label),
+      if (distanceText != null) _buildDistancePill(context, distanceText),
+      if (contact.routeHasPath && contact.routeHopCount > 0)
+        _buildRoutePill(context, contact),
+      if (location == null)
+        _buildMetaPill(
+          context,
+          icon: Icons.location_disabled_outlined,
+          label: AppLocalizations.of(context)!.noGpsData,
+        ),
+    ];
+
+    return Padding(
+      padding: const EdgeInsets.only(top: 4),
+      child: Wrap(spacing: 6, runSpacing: 6, children: compactPills),
+    );
+  }
+
   void _handlePrimaryTap(BuildContext context, Contact contact) {
     _showContactActionSheet(context, contact);
   }
@@ -283,10 +326,15 @@ class ContactTile extends StatelessWidget {
         contact.type == ContactType.room ||
         contact.type == ContactType.channel;
     final canSetPath =
-        contact.type == ContactType.chat || contact.type == ContactType.room;
+        contact.type == ContactType.chat ||
+        contact.type == ContactType.room ||
+        contact.type == ContactType.repeater ||
+        contact.type == ContactType.sensor;
     final canAddToSensors =
         contact.type == ContactType.chat ||
-        contact.type == ContactType.repeater;
+        contact.type == ContactType.repeater ||
+        contact.type == ContactType.sensor;
+    final canPreviewSensor = contact.isSensor;
     final sensorsProvider = context.read<SensorsProvider>();
     final isInSensors = sensorsProvider.isWatched(contact.publicKeyHex);
 
@@ -296,100 +344,143 @@ class ContactTile extends StatelessWidget {
         borderRadius: BorderRadius.vertical(top: Radius.circular(20)),
       ),
       builder: (sheetContext) => SafeArea(
-        child: Column(
-          mainAxisSize: MainAxisSize.min,
-          children: [
-            ListTile(
-              leading: const Icon(Icons.message_outlined),
-              title: Text(l10n.messages),
-              enabled: canMessage,
-              onTap: !canMessage
-                  ? null
-                  : () async {
-                      Navigator.pop(sheetContext);
-                      await _openMessagesForContact(context, contact);
-                    },
-            ),
-            if (contact.displayLocation != null)
+        child: SingleChildScrollView(
+          child: Column(
+            mainAxisSize: MainAxisSize.min,
+            children: [
               ListTile(
-                leading: const Icon(Icons.map_outlined),
-                title: Text(l10n.viewOnMap),
-                onTap: () {
-                  Navigator.pop(sheetContext);
-                  _showContactOnMap(context, contact);
-                },
-              ),
-            if (contact.type == ContactType.room && !contact.isPublicChannel)
-              ListTile(
-                leading: const Icon(Icons.login),
-                title: Text(
-                  context
-                              .read<ConnectionProvider>()
-                              .getRoomLoginState(contact.publicKeyPrefix)
-                              ?.isLoggedIn ==
-                          true
-                      ? AppLocalizations.of(context)!.reLoginToRoom
-                      : AppLocalizations.of(context)!.loginToRoom,
-                ),
-                onTap: () {
-                  Navigator.pop(sheetContext);
-                  _showRoomLoginDialog(context, contact);
-                },
-              ),
-            if (canAddToSensors)
-              ListTile(
-                leading: Icon(
-                  isInSensors ? Icons.sensors : Icons.sensors_outlined,
-                ),
-                title: Text(
-                  isInSensors
-                      ? l10n.contactInSensors
-                      : l10n.contactAddToSensors,
-                ),
-                enabled: !isInSensors,
-                onTap: isInSensors
+                leading: const Icon(Icons.message_outlined),
+                title: Text(l10n.messages),
+                enabled: canMessage,
+                onTap: !canMessage
                     ? null
                     : () async {
                         Navigator.pop(sheetContext);
-                        await _addContactToSensors(context, contact);
+                        await _openMessagesForContact(context, contact);
                       },
               ),
-            if (canSetPath)
-              ListTile(
-                leading: const Icon(Icons.alt_route),
-                title: Text(l10n.contactSetPath),
-                onTap: () {
-                  Navigator.pop(sheetContext);
-                  _showSetRouteDialog(context, contact);
-                },
-              ),
-            if (!contact.isPublicChannel)
-              ListTile(
-                leading: const Icon(Icons.delete, color: Colors.red),
-                title: Text(
-                  contact.isChannel ? l10n.deleteChannel : l10n.deleteContact,
-                  style: const TextStyle(color: Colors.red),
+              if (contact.displayLocation != null)
+                ListTile(
+                  leading: const Icon(Icons.map_outlined),
+                  title: Text(l10n.viewOnMap),
+                  onTap: () {
+                    Navigator.pop(sheetContext);
+                    _showContactOnMap(context, contact);
+                  },
                 ),
-                onTap: () async {
-                  Navigator.pop(sheetContext);
-                  await Future<void>.delayed(Duration.zero);
-                  if (!context.mounted) return;
-                  WidgetsBinding.instance.addPostFrameCallback((_) {
+              if (contact.type == ContactType.room && !contact.isPublicChannel)
+                ListTile(
+                  leading: const Icon(Icons.login),
+                  title: Text(
+                    context
+                                .read<ConnectionProvider>()
+                                .getRoomLoginState(contact.publicKeyPrefix)
+                                ?.isLoggedIn ==
+                            true
+                        ? AppLocalizations.of(context)!.reLoginToRoom
+                        : AppLocalizations.of(context)!.loginToRoom,
+                  ),
+                  onTap: () {
+                    Navigator.pop(sheetContext);
+                    _showRoomLoginDialog(context, contact);
+                  },
+                ),
+              if (canPreviewSensor)
+                ListTile(
+                  leading: const Icon(Icons.visibility_outlined),
+                  title: const Text('Preview'),
+                  onTap: () async {
+                    Navigator.pop(sheetContext);
+                    await Future<void>.delayed(Duration.zero);
                     if (!context.mounted) return;
-                    if (contact.isChannel) {
-                      _showDeleteChannelDialog(context, contact);
-                    } else {
-                      _showDeleteConfirmation(context, contact);
-                    }
-                  });
-                },
-              ),
-          ],
+                    await _showSensorPreviewView(context, contact);
+                  },
+                ),
+              if (canAddToSensors)
+                ListTile(
+                  leading: Icon(
+                    isInSensors ? Icons.sensors : Icons.sensors_outlined,
+                  ),
+                  title: Text(
+                    isInSensors
+                        ? l10n.contactInSensors
+                        : l10n.contactAddToSensors,
+                  ),
+                  enabled: !isInSensors,
+                  onTap: isInSensors
+                      ? null
+                      : () async {
+                          Navigator.pop(sheetContext);
+                          await _addContactToSensors(context, contact);
+                        },
+                ),
+              if (canSetPath)
+                ListTile(
+                  leading: const Icon(Icons.alt_route),
+                  title: Text(l10n.contactSetPath),
+                  onTap: () {
+                    Navigator.pop(sheetContext);
+                    _showSetRouteDialog(context, contact);
+                  },
+                ),
+              if (!contact.isChannel)
+                ListTile(
+                  leading: const Icon(Icons.route),
+                  title: const Text('Trace'),
+                  onTap: () {
+                    Navigator.pop(sheetContext);
+                    _showTraceSheet(context, contact);
+                  },
+                ),
+              if (!contact.isPublicChannel)
+                ListTile(
+                  leading: const Icon(Icons.edit_outlined),
+                  title: const Text('Edit name'),
+                  onTap: () {
+                    Navigator.pop(sheetContext);
+                    _showNameOverrideDialog(context, contact);
+                  },
+                ),
+              if (!contact.isPublicChannel)
+                ListTile(
+                  leading: const Icon(Icons.delete, color: Colors.red),
+                  title: Text(
+                    contact.isChannel ? l10n.deleteChannel : l10n.deleteContact,
+                    style: const TextStyle(color: Colors.red),
+                  ),
+                  onTap: () async {
+                    Navigator.pop(sheetContext);
+                    await Future<void>.delayed(Duration.zero);
+                    if (!context.mounted) return;
+                    WidgetsBinding.instance.addPostFrameCallback((_) {
+                      if (!context.mounted) return;
+                      if (contact.isChannel) {
+                        _showDeleteChannelDialog(context, contact);
+                      } else {
+                        _showDeleteConfirmation(context, contact);
+                      }
+                    });
+                  },
+                ),
+            ],
+          ),
         ),
       ),
     );
   }
 
+  Future<void> _showSensorPreviewView(
+    BuildContext context,
+    Contact contact,
+  ) async {
+    await Navigator.of(context).push(
+      MaterialPageRoute<void>(
+        fullscreenDialog: true,
+        builder: (pageContext) => _SensorPreviewView(contact: contact),
+      ),
+    );
+  }
+
   void _showContactOnMap(BuildContext context, Contact contact) {
     final location = contact.displayLocation;
     if (location == null) {
@@ -453,6 +544,18 @@ class ContactTile extends StatelessWidget {
     );
   }
 
+  void _showTraceSheet(BuildContext context, Contact contact) {
+    showModalBottomSheet(
+      context: context,
+      isScrollControlled: true,
+      backgroundColor: Theme.of(context).colorScheme.surface,
+      shape: const RoundedRectangleBorder(
+        borderRadius: BorderRadius.vertical(top: Radius.circular(16)),
+      ),
+      builder: (context) => ContactTraceSheet(contact: contact),
+    );
+  }
+
   void _showDeleteConfirmation(
     BuildContext context,
     Contact contact, {
@@ -512,6 +615,40 @@ class ContactTile extends StatelessWidget {
     }
   }
 
+  Future<void> _showNameOverrideDialog(
+    BuildContext context,
+    Contact contact,
+  ) async {
+    final l10n = AppLocalizations.of(context)!;
+    final result = await showModalBottomSheet<String?>(
+      context: context,
+      isScrollControlled: true,
+      showDragHandle: true,
+      builder: (dialogContext) => SafeArea(
+        child: Padding(
+          padding: EdgeInsets.only(
+            bottom: MediaQuery.of(dialogContext).viewInsets.bottom,
+          ),
+          child: _ContactNameOverrideSheet(
+            initialValue: contact.nameOverride ?? '',
+            advertisedName: contact.advName,
+            cancelLabel: l10n.cancel,
+            saveLabel: l10n.save,
+          ),
+        ),
+      ),
+    );
+
+    if (result == null || !context.mounted) {
+      return;
+    }
+
+    context.read<ContactsProvider>().setContactNameOverride(
+      contact.publicKeyHex,
+      result,
+    );
+  }
+
   Future<void> _showSetRouteDialog(
     BuildContext context,
     Contact contact,
@@ -569,6 +706,7 @@ class ContactTile extends StatelessWidget {
       contact.publicKey,
       signedEncodedPathLen: parsedRoute.signedEncodedPathLen,
       paddedPathBytes: parsedRoute.paddedPathBytes,
+      inferredFallbackLocation: routeResult.inferredFallbackLocation,
     );
 
     try {
@@ -649,6 +787,38 @@ class ContactTile extends StatelessWidget {
     );
   }
 
+  Widget _buildMetaPill(
+    BuildContext context, {
+    required IconData icon,
+    required String label,
+    bool monospace = false,
+  }) {
+    final colorScheme = Theme.of(context).colorScheme;
+
+    return Container(
+      padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 4),
+      decoration: BoxDecoration(
+        color: colorScheme.surfaceContainerHighest.withValues(alpha: 0.75),
+        borderRadius: BorderRadius.circular(999),
+      ),
+      child: Row(
+        mainAxisSize: MainAxisSize.min,
+        children: [
+          Icon(icon, size: 12, color: colorScheme.onSurfaceVariant),
+          const SizedBox(width: 4),
+          Text(
+            label,
+            style: Theme.of(context).textTheme.labelSmall?.copyWith(
+              color: colorScheme.onSurfaceVariant,
+              fontWeight: FontWeight.w700,
+              fontFamily: monospace ? 'monospace' : null,
+            ),
+          ),
+        ],
+      ),
+    );
+  }
+
   Widget _buildLocationLine(
     BuildContext context, {
     required double latitude,
@@ -838,3 +1008,159 @@ class ContactTile extends StatelessWidget {
     );
   }
 }
+
+class _SensorPreviewView extends StatelessWidget {
+  final Contact contact;
+
+  const _SensorPreviewView({required this.contact});
+
+  @override
+  Widget build(BuildContext context) {
+    final publicKeyHex = contact.publicKeyHex;
+    return Consumer2<ContactsProvider, SensorsProvider>(
+      builder: (context, contactsProvider, sensorsProvider, child) {
+        Contact? liveContact;
+        for (final entry in contactsProvider.contacts) {
+          if (entry.publicKeyHex == publicKeyHex) {
+            liveContact = entry;
+            break;
+          }
+        }
+
+        final previewContact = liveContact ?? contact;
+        final visibleFields = sensorMetricKeysFor(previewContact);
+        final fieldOrder = sensorsProvider.metricOrderFor(
+          publicKeyHex,
+          visibleFields,
+        );
+
+        return Scaffold(
+          appBar: AppBar(
+            leading: IconButton(
+              icon: const Icon(Icons.close),
+              onPressed: () => Navigator.of(context).pop(),
+            ),
+            title: Text(previewContact.displayName),
+          ),
+          body: ListView(
+            padding: const EdgeInsets.fromLTRB(16, 16, 16, 24),
+            children: [
+              SensorTelemetryCard(
+                contact: previewContact,
+                state: sensorsProvider.stateFor(publicKeyHex),
+                visibleFields: visibleFields,
+                fieldOrder: fieldOrder,
+                labelOverrides: sensorsProvider.labelOverridesFor(publicKeyHex),
+                fieldSpans: sensorFullWidthFieldSpans(visibleFields),
+                margin: EdgeInsets.zero,
+                emptyMetricsMessage: 'No telemetry fields available yet.',
+              ),
+            ],
+          ),
+        );
+      },
+    );
+  }
+}
+
+class _ContactNameOverrideSheet extends StatefulWidget {
+  final String initialValue;
+  final String advertisedName;
+  final String cancelLabel;
+  final String saveLabel;
+
+  const _ContactNameOverrideSheet({
+    required this.initialValue,
+    required this.advertisedName,
+    required this.cancelLabel,
+    required this.saveLabel,
+  });
+
+  @override
+  State<_ContactNameOverrideSheet> createState() =>
+      _ContactNameOverrideSheetState();
+}
+
+class _ContactNameOverrideSheetState extends State<_ContactNameOverrideSheet> {
+  late final TextEditingController _controller;
+
+  @override
+  void initState() {
+    super.initState();
+    _controller = TextEditingController(text: widget.initialValue);
+  }
+
+  @override
+  void dispose() {
+    _controller.dispose();
+    super.dispose();
+  }
+
+  void _submit() {
+    Navigator.of(context).pop(_controller.text);
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    final theme = Theme.of(context);
+
+    return SingleChildScrollView(
+      child: Padding(
+        padding: const EdgeInsets.fromLTRB(20, 8, 20, 20),
+        child: Column(
+          mainAxisSize: MainAxisSize.min,
+          crossAxisAlignment: CrossAxisAlignment.start,
+          children: [
+            Row(
+              children: [
+                Expanded(
+                  child: Text(
+                    'Edit name',
+                    style: theme.textTheme.titleLarge?.copyWith(
+                      fontWeight: FontWeight.w700,
+                    ),
+                  ),
+                ),
+                IconButton(
+                  onPressed: () => Navigator.of(context).pop(),
+                  icon: const Icon(Icons.close),
+                ),
+              ],
+            ),
+            const SizedBox(height: 8),
+            TextField(
+              controller: _controller,
+              autofocus: true,
+              textInputAction: TextInputAction.done,
+              decoration: InputDecoration(
+                labelText: 'Custom name',
+                hintText: widget.advertisedName,
+                helperText: 'Leave blank to use the advertised name.',
+                border: const OutlineInputBorder(),
+              ),
+              onSubmitted: (_) => _submit(),
+            ),
+            const SizedBox(height: 20),
+            Row(
+              children: [
+                Expanded(
+                  child: OutlinedButton(
+                    onPressed: () => Navigator.of(context).pop(),
+                    child: Text(widget.cancelLabel),
+                  ),
+                ),
+                const SizedBox(width: 12),
+                Expanded(
+                  child: FilledButton(
+                    onPressed: _submit,
+                    child: Text(widget.saveLabel),
+                  ),
+                ),
+              ],
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+}

lib/widgets/contacts/contact_trace_sheet.dart

@@ -0,0 +1,534 @@
+import 'dart:async';
+import 'dart:math' as math;
+
+import 'package:flutter/material.dart';
+import 'package:flutter_map/flutter_map.dart' as flutter_map;
+import 'package:latlong2/latlong.dart';
+import 'package:provider/provider.dart';
+
+import '../../models/contact.dart';
+import '../../providers/connection_provider.dart';
+import '../../providers/contacts_provider.dart';
+import '../../services/mesh_map_nodes_service.dart';
+import '../../utils/trace_node_resolver.dart';
+
+class ContactTraceSheet extends StatefulWidget {
+  final Contact contact;
+
+  const ContactTraceSheet({super.key, required this.contact});
+
+  @override
+  State<ContactTraceSheet> createState() => _ContactTraceSheetState();
+}
+
+class _ContactTraceSheetState extends State<ContactTraceSheet> {
+  late final Future<_ContactTraceResult> _future;
+  _ContactTraceResult? _traceOverride;
+
+  @override
+  void initState() {
+    super.initState();
+    _future = _loadTrace();
+  }
+
+  Future<_ContactTraceResult> _loadTrace() async {
+    final connectionProvider = context.read<ConnectionProvider>();
+    final contactsProvider = context.read<ContactsProvider>();
+    final localNodes = _localNodesFromContacts(
+      contactsProvider,
+      connectionProvider: connectionProvider,
+    );
+    final localPublicKeys = localNodes.map((node) => node.publicKey).toSet();
+
+    var trace = _buildTraceResult(
+      nodes: localNodes,
+      localPublicKeys: localPublicKeys,
+      selfPublicKey: connectionProvider.deviceInfo.publicKey,
+    );
+    if (_isCompleteTrace(trace)) {
+      return trace;
+    }
+
+    unawaited(
+      MeshMapNodesService.syncInBackgroundIfStale(
+        cacheTtl: MeshMapNodesService.traceCacheTtl,
+      ),
+    );
+
+    final remoteNodes = await MeshMapNodesService.loadCachedNodes(
+      cacheTtl: MeshMapNodesService.traceCacheTtl,
+    );
+    trace = _buildTraceResult(
+      nodes: _mergeNodes(localNodes, remoteNodes),
+      localPublicKeys: localPublicKeys,
+      selfPublicKey: connectionProvider.deviceInfo.publicKey,
+    );
+    return trace;
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return SafeArea(
+      child: FutureBuilder<_ContactTraceResult>(
+        future: _future,
+        builder: (context, snapshot) {
+          if (snapshot.connectionState != ConnectionState.done) {
+            return const SizedBox(
+              height: 360,
+              child: Center(child: CircularProgressIndicator()),
+            );
+          }
+          if (snapshot.hasError) {
+            return SizedBox(
+              height: 360,
+              child: Center(
+                child: Padding(
+                  padding: const EdgeInsets.all(16),
+                  child: Text('Failed to load trace: ${snapshot.error}'),
+                ),
+              ),
+            );
+          }
+
+          final trace = _traceOverride ?? snapshot.data!;
+          final routeEntries = _displayRouteEntries(trace);
+          final concreteNodes = routeEntries
+              .where((entry) => entry.resolved.node != null)
+              .map((entry) => entry.resolved.node!)
+              .toList();
+          final mapPoints = concreteNodes
+              .map((node) => LatLng(node.latitude, node.longitude))
+              .toList();
+          final hasMapPath = mapPoints.length >= 2;
+          final relayNodes = trace.matchedRelayNodes
+              .map((entry) => entry.node)
+              .whereType<MeshMapNode>();
+
+          return SizedBox(
+            height: MediaQuery.of(context).size.height * 0.75,
+            child: Column(
+              crossAxisAlignment: CrossAxisAlignment.start,
+              children: [
+                const SizedBox(height: 12),
+                Center(
+                  child: Container(
+                    width: 40,
+                    height: 4,
+                    decoration: BoxDecoration(
+                      color: Theme.of(context).dividerColor,
+                      borderRadius: BorderRadius.circular(2),
+                    ),
+                  ),
+                ),
+                Padding(
+                  padding: const EdgeInsets.fromLTRB(16, 14, 16, 8),
+                  child: Text(
+                    'Trace',
+                    style: Theme.of(context).textTheme.titleLarge,
+                  ),
+                ),
+                Padding(
+                  padding: const EdgeInsets.symmetric(horizontal: 16),
+                  child: Text(
+                    trace.routeHashes.isEmpty
+                        ? 'No relay path saved for ${widget.contact.displayName}'
+                        : 'Route from saved contact path (${trace.routeHashes.length} hop${trace.routeHashes.length == 1 ? '' : 's'})',
+                    style: Theme.of(context).textTheme.bodySmall,
+                  ),
+                ),
+                const SizedBox(height: 10),
+                Expanded(
+                  child: ListView(
+                    padding: const EdgeInsets.only(bottom: 16),
+                    children: [
+                      Padding(
+                        padding: const EdgeInsets.symmetric(horizontal: 16),
+                        child: SizedBox(
+                          height: 240,
+                          child: ClipRRect(
+                            borderRadius: BorderRadius.circular(12),
+                            child: DecoratedBox(
+                              decoration: BoxDecoration(
+                                border: Border.all(
+                                  color: Theme.of(context).dividerColor,
+                                ),
+                              ),
+                              child: hasMapPath
+                                  ? flutter_map.FlutterMap(
+                                      options: flutter_map.MapOptions(
+                                        initialCameraFit:
+                                            flutter_map.CameraFit.bounds(
+                                              bounds:
+                                                  flutter_map
+                                                      .LatLngBounds.fromPoints(
+                                                    mapPoints,
+                                                  ),
+                                              padding: const EdgeInsets.all(28),
+                                            ),
+                                      ),
+                                      children: [
+                                        flutter_map.TileLayer(
+                                          urlTemplate:
+                                              'https://tile.openstreetmap.org/{z}/{x}/{y}.png',
+                                          userAgentPackageName:
+                                              'com.meshcore.sar',
+                                        ),
+                                        flutter_map.PolylineLayer(
+                                          polylines: [
+                                            flutter_map.Polyline(
+                                              points: mapPoints,
+                                              strokeWidth: 4,
+                                              color: Theme.of(
+                                                context,
+                                              ).colorScheme.primary,
+                                            ),
+                                          ],
+                                        ),
+                                        flutter_map.MarkerLayer(
+                                          markers: concreteNodes
+                                              .asMap()
+                                              .entries
+                                              .map(
+                                                (entry) => flutter_map.Marker(
+                                                  point: LatLng(
+                                                    entry.value.latitude,
+                                                    entry.value.longitude,
+                                                  ),
+                                                  width: 34,
+                                                  height: 34,
+                                                  child: CircleAvatar(
+                                                    radius: 16,
+                                                    backgroundColor:
+                                                        Colors.blue,
+                                                    child: Text(
+                                                      '${entry.key + 1}',
+                                                      style: const TextStyle(
+                                                        color: Colors.white,
+                                                        fontWeight:
+                                                            FontWeight.bold,
+                                                        fontSize: 11,
+                                                      ),
+                                                    ),
+                                                  ),
+                                                ),
+                                              )
+                                              .toList(),
+                                        ),
+                                      ],
+                                    )
+                                  : const Center(
+                                      child: Text(
+                                        'Not enough geolocated nodes to draw path',
+                                      ),
+                                    ),
+                            ),
+                          ),
+                        ),
+                      ),
+                      const SizedBox(height: 12),
+                      Padding(
+                        padding: const EdgeInsets.symmetric(horizontal: 16),
+                        child: Text(
+                          'Relay path',
+                          style: Theme.of(context).textTheme.titleMedium,
+                        ),
+                      ),
+                      if (routeEntries.isEmpty)
+                        const Padding(
+                          padding: EdgeInsets.symmetric(
+                            horizontal: 16,
+                            vertical: 8,
+                          ),
+                          child: Text(
+                            'No named nodes could be matched for this trace.',
+                          ),
+                        ),
+                      ...routeEntries.asMap().entries.map(
+                        (entry) => ListTile(
+                          onTap: entry.value.resolved.canCycle
+                              ? () => setState(() {
+                                  final baseTrace =
+                                      _traceOverride ?? snapshot.data!;
+                                  _traceOverride = baseTrace.cycleEntry(
+                                    entry.value.target,
+                                  );
+                                })
+                              : null,
+                          leading: CircleAvatar(
+                            radius: 14,
+                            backgroundColor: Colors.blue,
+                            child: Text(
+                              '${entry.key + 1}',
+                              style: const TextStyle(
+                                color: Colors.white,
+                                fontWeight: FontWeight.bold,
+                                fontSize: 11,
+                              ),
+                            ),
+                          ),
+                          title: Text(entry.value.label),
+                          subtitle: Text(
+                            'Relay${entry.value.keyLabel == null ? '' : ' • ${entry.value.keyLabel}'}${entry.value.matchSummary == null ? '' : ' • ${entry.value.matchSummary}'}${entry.value.resolved.cycleSummary == null ? '' : ' • ${entry.value.resolved.cycleSummary}'}',
+                          ),
+                          trailing: entry.value.resolved.canCycle
+                              ? const Icon(Icons.sync_alt)
+                              : null,
+                        ),
+                      ),
+                      const SizedBox(height: 12),
+                      Padding(
+                        padding: const EdgeInsets.symmetric(horizontal: 16),
+                        child: Text(
+                          'Relays (${relayNodes.length})',
+                          style: Theme.of(context).textTheme.titleMedium,
+                        ),
+                      ),
+                      if (relayNodes.isEmpty)
+                        const Padding(
+                          padding: EdgeInsets.symmetric(
+                            horizontal: 16,
+                            vertical: 8,
+                          ),
+                          child: Text(
+                            'No relay nodes could be matched for this contact.',
+                          ),
+                        ),
+                      ...relayNodes.map(
+                        (node) => ListTile(
+                          leading: const Icon(Icons.router),
+                          title: Text(node.name),
+                          subtitle: Text(
+                            '${node.publicKey.substring(0, math.min(12, node.publicKey.length))} • '
+                            '${node.latitude.toStringAsFixed(5)}, ${node.longitude.toStringAsFixed(5)}',
+                          ),
+                        ),
+                      ),
+                    ],
+                  ),
+                ),
+              ],
+            ),
+          );
+        },
+      ),
+    );
+  }
+
+  List<_RouteDisplayEntry> _displayRouteEntries(_ContactTraceResult trace) {
+    return trace.matchedRelayNodes.asMap().entries.map((entry) {
+      final resolved = entry.value;
+      final node = resolved.node;
+      final hashHex = trace.routeHashes[entry.key].toUpperCase();
+      return _RouteDisplayEntry(
+        resolved: resolved,
+        label: node?.name ?? 'Unknown',
+        keyLabel: node != null ? _prefixKeyLabel(node.publicKey) : hashHex,
+        matchSummary: resolved.matchSummary,
+        target: _RouteEntryTarget.relayNode(entry.key),
+      );
+    }).toList();
+  }
+
+  String _prefixKeyLabel(String publicKey) =>
+      publicKey.substring(0, math.min(12, publicKey.length));
+
+  bool _isCompleteTrace(_ContactTraceResult trace) {
+    if (trace.sender.node == null || trace.recipient.node == null) {
+      return false;
+    }
+    if (trace.routeHashes.isEmpty) {
+      return true;
+    }
+    return trace.matchedRelayNodes.every((node) => node.node != null);
+  }
+
+  _ContactTraceResult _buildTraceResult({
+    required List<MeshMapNode> nodes,
+    required Set<String> localPublicKeys,
+    required List<int>? selfPublicKey,
+  }) {
+    final senderNode = TraceNodeResolver.resolveBest(
+      nodes: nodes,
+      localPublicKeys: localPublicKeys,
+      prefixHex: _toPrefixHex(selfPublicKey),
+    );
+    final recipientNode = TraceNodeResolver.resolveBest(
+      nodes: nodes,
+      localPublicKeys: localPublicKeys,
+      prefixHex: _toPrefixHex(widget.contact.publicKey),
+    );
+    final senderLatLng = senderNode.node == null
+        ? null
+        : LatLng(senderNode.node!.latitude, senderNode.node!.longitude);
+    final recipientLatLng = recipientNode.node == null
+        ? null
+        : LatLng(recipientNode.node!.latitude, recipientNode.node!.longitude);
+    final routeHashes =
+        widget.contact.routeHasPath && widget.contact.routeHopCount > 0
+        ? widget.contact.routeCanonicalText
+              .split(',')
+              .where((token) => token.isNotEmpty)
+              .map((token) => token.toLowerCase())
+              .toList()
+        : const <String>[];
+
+    final matchedRelayNodes = routeHashes
+        .map(
+          (hash) => TraceNodeResolver.resolveBest(
+            nodes: nodes,
+            localPublicKeys: localPublicKeys,
+            prefixHex: hash,
+            referenceA: senderLatLng,
+            referenceB: recipientLatLng,
+          ),
+        )
+        .toList();
+    final alignedRelayNodes = TraceNodeResolver.alignPathSelections(
+      nodes: matchedRelayNodes,
+      startNode: senderNode.node,
+      endNode: recipientNode.node,
+    );
+
+    return _ContactTraceResult(
+      sender: senderNode,
+      recipient: recipientNode,
+      routeHashes: routeHashes,
+      matchedRelayNodes: alignedRelayNodes,
+    );
+  }
+
+  String? _toPrefixHex(List<int>? key) {
+    if (key == null || key.isEmpty) return null;
+    final take = key.length < 6 ? key.length : 6;
+    return key
+        .take(take)
+        .map((b) => b.toRadixString(16).padLeft(2, '0'))
+        .join()
+        .toLowerCase();
+  }
+
+  List<MeshMapNode> _localNodesFromContacts(
+    ContactsProvider contactsProvider, {
+    required ConnectionProvider connectionProvider,
+  }) {
+    final nodes = contactsProvider.contactsWithLocation
+        .map((contact) {
+          final location = contact.displayLocation;
+          if (location == null) return null;
+          return MeshMapNode(
+            type: contact.type.index,
+            name: contact.displayName,
+            publicKey: contact.publicKeyHex.toLowerCase(),
+            latitude: location.latitude,
+            longitude: location.longitude,
+            updatedAtMs: contact.lastAdvert * 1000,
+          );
+        })
+        .whereType<MeshMapNode>()
+        .toList();
+
+    final selfNode = _selfNode(connectionProvider);
+    if (selfNode != null) {
+      nodes.add(selfNode);
+    }
+    return nodes;
+  }
+
+  MeshMapNode? _selfNode(ConnectionProvider connectionProvider) {
+    final publicKey = connectionProvider.deviceInfo.publicKey;
+    final advLat = connectionProvider.deviceInfo.advLat;
+    final advLon = connectionProvider.deviceInfo.advLon;
+    if (publicKey == null || advLat == null || advLon == null) {
+      return null;
+    }
+    if (advLat == 0 && advLon == 0) {
+      return null;
+    }
+
+    return MeshMapNode(
+      type: -1,
+      name: connectionProvider.deviceInfo.selfName?.trim().isNotEmpty == true
+          ? connectionProvider.deviceInfo.selfName!.trim()
+          : 'You',
+      publicKey: publicKey
+          .map((b) => b.toRadixString(16).padLeft(2, '0'))
+          .join()
+          .toLowerCase(),
+      latitude: advLat / 1e6,
+      longitude: advLon / 1e6,
+      updatedAtMs: DateTime.now().millisecondsSinceEpoch,
+    );
+  }
+
+  List<MeshMapNode> _mergeNodes(
+    List<MeshMapNode> preferred,
+    List<MeshMapNode> fallback,
+  ) {
+    final merged = <String, MeshMapNode>{};
+    for (final node in fallback) {
+      merged[node.publicKey] = node;
+    }
+    for (final node in preferred) {
+      merged[node.publicKey] = node;
+    }
+    return merged.values.toList();
+  }
+}
+
+class _ContactTraceResult {
+  final ResolvedTraceNode sender;
+  final ResolvedTraceNode recipient;
+  final List<String> routeHashes;
+  final List<ResolvedTraceNode> matchedRelayNodes;
+
+  const _ContactTraceResult({
+    required this.sender,
+    required this.recipient,
+    required this.routeHashes,
+    required this.matchedRelayNodes,
+  });
+
+  _ContactTraceResult cycleEntry(_RouteEntryTarget target) {
+    switch (target.kind) {
+      case _RouteEntryKind.relayNode:
+        final updated = matchedRelayNodes.toList();
+        updated[target.index] = updated[target.index].cycle();
+        return _ContactTraceResult(
+          sender: sender,
+          recipient: recipient,
+          routeHashes: routeHashes,
+          matchedRelayNodes: updated,
+        );
+    }
+  }
+}
+
+class _RouteDisplayEntry {
+  final ResolvedTraceNode resolved;
+  final String label;
+  final String? keyLabel;
+  final String? matchSummary;
+  final _RouteEntryTarget target;
+
+  const _RouteDisplayEntry({
+    required this.resolved,
+    required this.label,
+    required this.keyLabel,
+    required this.matchSummary,
+    required this.target,
+  });
+
+  MeshMapNode? get node => resolved.node;
+}
+
+enum _RouteEntryKind { relayNode }
+
+class _RouteEntryTarget {
+  final _RouteEntryKind kind;
+  final int index;
+
+  const _RouteEntryTarget._(this.kind, [this.index = 0]);
+
+  const _RouteEntryTarget.relayNode(int index)
+    : this._(_RouteEntryKind.relayNode, index);
+}

lib/widgets/contacts/room_login_sheet.dart

@@ -147,6 +147,10 @@ class _RoomLoginSheetState extends State<RoomLoginSheet> {
           try {
             // Manually add the room contact to the radio's flash storage
             await connectionProvider.addOrUpdateContact(widget.contact);
+            final addError = connectionProvider.error;
+            if (addError != null) {
+              throw Exception(addError);
+            }
 
             debugPrint(
               '✅ [RoomLogin] Room contact added via CMD_ADD_UPDATE_CONTACT',

lib/widgets/map/compass/compass_contact_list.dart

@@ -42,6 +42,7 @@ class CompassContactList extends StatelessWidget {
     // Split contacts by type
     final persons = <Map<String, dynamic>>[];
     final repeaters = <Map<String, dynamic>>[];
+    final sensors = <Map<String, dynamic>>[];
     final rooms = <Map<String, dynamic>>[];
 
     // Calculate bearings and distances for each contact
@@ -70,6 +71,8 @@ class CompassContactList extends StatelessWidget {
 
       if (contact.isRepeater) {
         repeaters.add(item);
+      } else if (contact.isSensor) {
+        sensors.add(item);
       } else if (contact.isRoom) {
         rooms.add(item);
       } else {
@@ -78,9 +81,18 @@ class CompassContactList extends StatelessWidget {
     }
 
     // Sort each list by distance
-    persons.sort((a, b) => (a['distance'] as double).compareTo(b['distance'] as double));
-    repeaters.sort((a, b) => (a['distance'] as double).compareTo(b['distance'] as double));
-    rooms.sort((a, b) => (a['distance'] as double).compareTo(b['distance'] as double));
+    persons.sort(
+      (a, b) => (a['distance'] as double).compareTo(b['distance'] as double),
+    );
+    repeaters.sort(
+      (a, b) => (a['distance'] as double).compareTo(b['distance'] as double),
+    );
+    sensors.sort(
+      (a, b) => (a['distance'] as double).compareTo(b['distance'] as double),
+    );
+    rooms.sort(
+      (a, b) => (a['distance'] as double).compareTo(b['distance'] as double),
+    );
 
     return Column(
       crossAxisAlignment: CrossAxisAlignment.start,
@@ -91,17 +103,34 @@ class CompassContactList extends StatelessWidget {
             padding: const EdgeInsets.only(left: 16, bottom: 8, top: 4),
             child: Text(
               l10n.teamMembers,
-              style: Theme.of(context).textTheme.titleMedium?.copyWith(
-                    fontWeight: FontWeight.bold,
-                  ),
+              style: Theme.of(
+                context,
+              ).textTheme.titleMedium?.copyWith(fontWeight: FontWeight.bold),
             ),
           ),
-          ...persons.map((item) => _buildContactTile(
+          ...persons.map(
+            (item) => _buildContactTile(
+              context,
+              item,
+              Icons.groups,
+              Theme.of(context).colorScheme.primary,
+            ),
+          ),
+        ],
+        if (showContacts && sensors.isNotEmpty) ...[
+          Padding(
+            padding: const EdgeInsets.only(left: 16, bottom: 8, top: 12),
+            child: Text(
+              'Sensors',
+              style: Theme.of(
                 context,
-                item,
-                Icons.groups,
-                Theme.of(context).colorScheme.primary,
-              )),
+              ).textTheme.titleMedium?.copyWith(fontWeight: FontWeight.bold),
+            ),
+          ),
+          ...sensors.map(
+            (item) =>
+                _buildContactTile(context, item, Icons.sensors, Colors.green),
+          ),
         ],
         // Repeaters section
         if (showRepeaters && repeaters.isNotEmpty) ...[
@@ -109,17 +138,15 @@ class CompassContactList extends StatelessWidget {
             padding: const EdgeInsets.only(left: 16, bottom: 8, top: 12),
             child: Text(
               l10n.repeaters,
-              style: Theme.of(context).textTheme.titleMedium?.copyWith(
-                    fontWeight: FontWeight.bold,
-                  ),
+              style: Theme.of(
+                context,
+              ).textTheme.titleMedium?.copyWith(fontWeight: FontWeight.bold),
             ),
           ),
-          ...repeaters.map((item) => _buildContactTile(
-                context,
-                item,
-                Icons.router,
-                Colors.purple,
-              )),
+          ...repeaters.map(
+            (item) =>
+                _buildContactTile(context, item, Icons.router, Colors.purple),
+          ),
         ],
         // Rooms section
         if (rooms.isNotEmpty) ...[
@@ -127,17 +154,19 @@ class CompassContactList extends StatelessWidget {
             padding: const EdgeInsets.only(left: 16, bottom: 8, top: 12),
             child: Text(
               l10n.rooms,
-              style: Theme.of(context).textTheme.titleMedium?.copyWith(
-                    fontWeight: FontWeight.bold,
-                  ),
+              style: Theme.of(
+                context,
+              ).textTheme.titleMedium?.copyWith(fontWeight: FontWeight.bold),
+            ),
+          ),
+          ...rooms.map(
+            (item) => _buildContactTile(
+              context,
+              item,
+              Icons.meeting_room,
+              Colors.teal,
             ),
           ),
-          ...rooms.map((item) => _buildContactTile(
-                context,
-                item,
-                Icons.meeting_room,
-                Colors.teal,
-              )),
         ],
       ],
     );
@@ -161,24 +190,14 @@ class CompassContactList extends StatelessWidget {
             : Theme.of(context).colorScheme.surfaceContainerHighest,
         borderRadius: BorderRadius.circular(8),
         border: selectedContact == contact
-            ? Border.all(
-                color: Theme.of(context).colorScheme.primary,
-                width: 2,
-              )
+            ? Border.all(color: Theme.of(context).colorScheme.primary, width: 2)
             : null,
       ),
       child: ListTile(
         dense: true,
         leading: contact.roleEmoji != null
-            ? Text(
-                contact.roleEmoji!,
-                style: const TextStyle(fontSize: 24),
-              )
-            : Icon(
-                defaultIcon,
-                color: iconColor,
-                size: 24,
-              ),
+            ? Text(contact.roleEmoji!, style: const TextStyle(fontSize: 24))
+            : Icon(defaultIcon, color: iconColor, size: 24),
         title: Text(contact.displayName),
         subtitle: Text(
           '${_bearingToCardinal(bearing)} • ${_formatDistance(distance)}',
@@ -190,16 +209,16 @@ class CompassContactList extends StatelessWidget {
           children: [
             Text(
               '${bearing.round()}°',
-              style: Theme.of(context).textTheme.bodySmall?.copyWith(
-                    fontWeight: FontWeight.bold,
-                  ),
+              style: Theme.of(
+                context,
+              ).textTheme.bodySmall?.copyWith(fontWeight: FontWeight.bold),
             ),
             if (heading != null)
               Text(
                 _formatRelativeBearing(bearing, heading!, context),
-                style: Theme.of(context).textTheme.labelSmall?.copyWith(
-                      color: Colors.grey,
-                    ),
+                style: Theme.of(
+                  context,
+                ).textTheme.labelSmall?.copyWith(color: Colors.grey),
               ),
           ],
         ),
@@ -217,15 +236,14 @@ class CompassContactList extends StatelessWidget {
   }
 
   // Calculate bearing between two points (in degrees)
-  double _calculateBearing(
-      double lat1, double lon1, double lat2, double lon2) {
+  double _calculateBearing(double lat1, double lon1, double lat2, double lon2) {
     final dLon = (lon2 - lon1) * pi / 180;
     final lat1Rad = lat1 * pi / 180;
     final lat2Rad = lat2 * pi / 180;
 
     final y = sin(dLon) * cos(lat2Rad);
-    final x = cos(lat1Rad) * sin(lat2Rad) -
-        sin(lat1Rad) * cos(lat2Rad) * cos(dLon);
+    final x =
+        cos(lat1Rad) * sin(lat2Rad) - sin(lat1Rad) * cos(lat2Rad) * cos(dLon);
 
     final bearing = atan2(y, x) * 180 / pi;
     return (bearing + 360) % 360;
@@ -233,12 +251,17 @@ class CompassContactList extends StatelessWidget {
 
   // Calculate distance between two points (in meters)
   double _calculateDistance(
-      double lat1, double lon1, double lat2, double lon2) {
+    double lat1,
+    double lon1,
+    double lat2,
+    double lon2,
+  ) {
     const R = 6371000; // Earth's radius in meters
     final dLat = (lat2 - lat1) * pi / 180;
     final dLon = (lon2 - lon1) * pi / 180;
 
-    final a = sin(dLat / 2) * sin(dLat / 2) +
+    final a =
+        sin(dLat / 2) * sin(dLat / 2) +
         cos(lat1 * pi / 180) *
             cos(lat2 * pi / 180) *
             sin(dLon / 2) *
@@ -262,7 +285,11 @@ class CompassContactList extends StatelessWidget {
     }
   }
 
-  String _formatRelativeBearing(double bearing, double heading, BuildContext context) {
+  String _formatRelativeBearing(
+    double bearing,
+    double heading,
+    BuildContext context,
+  ) {
     final l10n = AppLocalizations.of(context)!;
     // Calculate relative bearing (how much to turn from current heading)
     double relative = bearing - heading;

lib/widgets/map_markers.dart

@@ -12,98 +12,107 @@ class MapMarkers {
     Function(Contact)? onContactTap,
     double mapRotation = 0,
   }) {
-    return contacts.map((contact) {
-      final location = contact.displayLocation;
-      if (location == null) return null;
+    return contacts
+        .map((contact) {
+          final location = contact.displayLocation;
+          if (location == null) return null;
 
-      return Marker(
-        point: location,
-        width: 80,
-        height: 100,
-        rotate: false, // Don't rotate the entire marker with map
-        child: Transform.rotate(
-          angle: -mapRotation * 3.14159265359 / 180,
-          child: GestureDetector(
-            onTap: () {
-              if (onContactTap != null) {
-                onContactTap(contact);
-              } else {
-                _showContactInfo(context, contact);
-              }
-            },
-            child: Column(
-              mainAxisSize: MainAxisSize.min,
-              children: [
-                // Location update time indicator
-                Container(
-                  padding: const EdgeInsets.symmetric(horizontal: 4, vertical: 1),
-                  decoration: BoxDecoration(
-                    color: _getLocationAgeColor(contact),
-                    borderRadius: BorderRadius.circular(3),
-                  ),
-                  child: Text(
-                    contact.timeSinceLocationUpdate,
-                    style: const TextStyle(
-                      color: Colors.white,
-                      fontSize: 9,
-                      fontWeight: FontWeight.bold,
-                    ),
-                  ),
-                ),
-                const SizedBox(height: 2),
-                // Marker icon or emoji
-                Container(
-                  decoration: BoxDecoration(
-                    color: _getContactTypeColor(contact, context),
-                    shape: BoxShape.circle,
-                    border: Border.all(color: Colors.white, width: 2),
-                    boxShadow: [
-                      BoxShadow(
-                        color: Colors.black.withValues(alpha: 0.3),
-                        blurRadius: 4,
-                        offset: const Offset(0, 2),
+          return Marker(
+            point: location,
+            width: 80,
+            height: 100,
+            rotate: false, // Don't rotate the entire marker with map
+            child: Transform.rotate(
+              angle: -mapRotation * 3.14159265359 / 180,
+              child: GestureDetector(
+                onTap: () {
+                  if (onContactTap != null) {
+                    onContactTap(contact);
+                  } else {
+                    _showContactInfo(context, contact);
+                  }
+                },
+                child: Column(
+                  mainAxisSize: MainAxisSize.min,
+                  children: [
+                    // Location update time indicator
+                    Container(
+                      padding: const EdgeInsets.symmetric(
+                        horizontal: 4,
+                        vertical: 1,
                       ),
-                    ],
-                  ),
-                  padding: const EdgeInsets.all(6),
-                  child: contact.roleEmoji != null
-                      ? Text(
-                          contact.roleEmoji!,
-                          style: const TextStyle(fontSize: 18),
-                        )
-                      : Icon(
-                          _getContactTypeIcon(contact),
+                      decoration: BoxDecoration(
+                        color: _getLocationAgeColor(contact),
+                        borderRadius: BorderRadius.circular(3),
+                      ),
+                      child: Text(
+                        contact.timeSinceLocationUpdate,
+                        style: const TextStyle(
                           color: Colors.white,
-                          size: 18,
+                          fontSize: 9,
+                          fontWeight: FontWeight.bold,
                         ),
-                ),
-                const SizedBox(height: 2),
-                // Name label (without emoji)
-                Container(
-                  constraints: const BoxConstraints(maxWidth: 80),
-                  padding: const EdgeInsets.symmetric(horizontal: 4, vertical: 1),
-                  decoration: BoxDecoration(
-                    color: Colors.black.withValues(alpha: 0.7),
-                    borderRadius: BorderRadius.circular(3),
-                  ),
-                  child: Text(
-                    contact.displayName,
-                    style: const TextStyle(
-                      color: Colors.white,
-                      fontSize: 9,
-                      fontWeight: FontWeight.bold,
+                      ),
                     ),
-                    overflow: TextOverflow.ellipsis,
-                    maxLines: 1,
-                    textAlign: TextAlign.center,
-                  ),
+                    const SizedBox(height: 2),
+                    // Marker icon or emoji
+                    Container(
+                      decoration: BoxDecoration(
+                        color: _getContactTypeColor(contact, context),
+                        shape: BoxShape.circle,
+                        border: Border.all(color: Colors.white, width: 2),
+                        boxShadow: [
+                          BoxShadow(
+                            color: Colors.black.withValues(alpha: 0.3),
+                            blurRadius: 4,
+                            offset: const Offset(0, 2),
+                          ),
+                        ],
+                      ),
+                      padding: const EdgeInsets.all(6),
+                      child: contact.roleEmoji != null
+                          ? Text(
+                              contact.roleEmoji!,
+                              style: const TextStyle(fontSize: 18),
+                            )
+                          : Icon(
+                              _getContactTypeIcon(contact),
+                              color: Colors.white,
+                              size: 18,
+                            ),
+                    ),
+                    const SizedBox(height: 2),
+                    // Name label (without emoji)
+                    Container(
+                      constraints: const BoxConstraints(maxWidth: 80),
+                      padding: const EdgeInsets.symmetric(
+                        horizontal: 4,
+                        vertical: 1,
+                      ),
+                      decoration: BoxDecoration(
+                        color: Colors.black.withValues(alpha: 0.7),
+                        borderRadius: BorderRadius.circular(3),
+                      ),
+                      child: Text(
+                        contact.displayName,
+                        style: const TextStyle(
+                          color: Colors.white,
+                          fontSize: 9,
+                          fontWeight: FontWeight.bold,
+                        ),
+                        overflow: TextOverflow.ellipsis,
+                        maxLines: 1,
+                        textAlign: TextAlign.center,
+                      ),
+                    ),
+                  ],
                 ),
-              ],
+              ),
             ),
-          ),
-        ),
-      );
-    }).whereType<Marker>().toList();
+          );
+        })
+        .whereType<Marker>()
+        .toList();
   }
 
   static List<Marker> createSarMarkers(
@@ -133,7 +142,10 @@ class MapMarkers {
               children: [
                 // Time ago label
                 Container(
-                  padding: const EdgeInsets.symmetric(horizontal: 4, vertical: 1),
+                  padding: const EdgeInsets.symmetric(
+                    horizontal: 4,
+                    vertical: 1,
+                  ),
                   decoration: BoxDecoration(
                     color: _getSarMarkerColor(marker),
                     borderRadius: BorderRadius.circular(3),
@@ -164,7 +176,7 @@ class MapMarkers {
                   ),
                   padding: const EdgeInsets.all(6),
                   child: Text(
-                    marker.emoji,  // Use custom emoji if available
+                    marker.emoji, // Use custom emoji if available
                     style: const TextStyle(fontSize: 18),
                   ),
                 ),
@@ -172,7 +184,10 @@ class MapMarkers {
                 // Type label
                 Container(
                   constraints: const BoxConstraints(maxWidth: 90),
-                  padding: const EdgeInsets.symmetric(horizontal: 4, vertical: 1),
+                  padding: const EdgeInsets.symmetric(
+                    horizontal: 4,
+                    vertical: 1,
+                  ),
                   decoration: BoxDecoration(
                     color: Colors.black.withValues(alpha: 0.7),
                     borderRadius: BorderRadius.circular(3),
@@ -183,8 +198,12 @@ class MapMarkers {
                       debugPrint('🗺️ [MapMarker] Displaying SAR marker:');
                       debugPrint('   marker.notes: "${marker.notes}"');
                       debugPrint('   marker.type: ${marker.type}');
-                      debugPrint('   marker.type.displayName: ${marker.type.displayName}');
-                      debugPrint('   marker.displayName: ${marker.displayName}');
+                      debugPrint(
+                        '   marker.type.displayName: ${marker.type.displayName}',
+                      );
+                      debugPrint(
+                        '   marker.displayName: ${marker.displayName}',
+                      );
 
                       return Text(
                         marker.displayName,
@@ -241,17 +260,25 @@ class MapMarkers {
               _InfoRow(
                 'Voltage',
                 '${(contact.telemetry!.batteryMilliVolts! / 1000).toStringAsFixed(3)}V'
-                '${contact.telemetry!.batteryPercentage != null ? ' (${contact.telemetry!.batteryPercentage!.toStringAsFixed(1)}%)' : ''}',
+                    '${contact.telemetry!.batteryPercentage != null ? ' (${contact.telemetry!.batteryPercentage!.toStringAsFixed(1)}%)' : ''}',
               )
             else if (contact.displayBattery != null)
               _InfoRow('Battery', '${contact.displayBattery!.round()}%'),
             if (contact.telemetry?.temperature != null)
               _InfoRow(
-                  'Temperature', '${contact.telemetry!.temperature!.toStringAsFixed(1)}°C'),
+                'Temperature',
+                '${contact.telemetry!.temperature!.toStringAsFixed(1)}°C',
+              ),
             if (contact.telemetry?.humidity != null)
-              _InfoRow('Humidity', '${contact.telemetry!.humidity!.toStringAsFixed(1)}%'),
+              _InfoRow(
+                'Humidity',
+                '${contact.telemetry!.humidity!.toStringAsFixed(1)}%',
+              ),
             if (contact.telemetry?.pressure != null)
-              _InfoRow('Pressure', '${contact.telemetry!.pressure!.toStringAsFixed(1)} hPa'),
+              _InfoRow(
+                'Pressure',
+                '${contact.telemetry!.pressure!.toStringAsFixed(1)} hPa',
+              ),
             _InfoRow('Last Seen', contact.timeSinceLastSeen),
             _InfoRow('Public Key', contact.publicKeyShort),
           ],
@@ -272,7 +299,10 @@ class MapMarkers {
       builder: (context) => AlertDialog(
         title: Row(
           children: [
-            Text(marker.emoji, style: const TextStyle(fontSize: 24)),  // Use custom emoji if available
+            Text(
+              marker.emoji,
+              style: const TextStyle(fontSize: 24),
+            ), // Use custom emoji if available
             const SizedBox(width: 8),
             Expanded(child: Text(marker.displayName)),
           ],
@@ -313,7 +343,9 @@ class MapMarkers {
 
   static Color _getSarMarkerColor(SarMarker marker) {
     // If marker has a color index, use it (new format)
-    if (marker.colorIndex != null && marker.colorIndex! >= 0 && marker.colorIndex! < 8) {
+    if (marker.colorIndex != null &&
+        marker.colorIndex! >= 0 &&
+        marker.colorIndex! < 8) {
       final colorHex = SarTemplate.getColorFromIndex(marker.colorIndex!);
       final hexCode = colorHex.replaceAll('#', '');
       return Color(int.parse('FF$hexCode', radix: 16));
@@ -342,6 +374,8 @@ class MapMarkers {
         return Colors.deepPurple; // Purple for repeaters
       case ContactType.room:
         return Colors.teal; // Teal for rooms
+      case ContactType.sensor:
+        return Colors.green; // Green for sensors
       case ContactType.channel:
         return Colors.orange; // Orange for channels
       case ContactType.none:
@@ -357,6 +391,8 @@ class MapMarkers {
         return Icons.router; // Router icon for repeaters
       case ContactType.room:
         return Icons.forum; // Forum/chat icon for rooms
+      case ContactType.sensor:
+        return Icons.sensors; // Sensors icon for sensor nodes
       case ContactType.channel:
         return Icons.public; // Public icon for channels
       case ContactType.none:
@@ -385,9 +421,7 @@ class _InfoRow extends StatelessWidget {
               style: const TextStyle(fontWeight: FontWeight.w600),
             ),
           ),
-          Expanded(
-            child: Text(value),
-          ),
+          Expanded(child: Text(value)),
         ],
       ),
     );

lib/widgets/messages/message_bubble.dart

@@ -45,6 +45,7 @@ import 'system_message_bubble.dart';
 /// - Grouped messages (expandable recipient list)
 class MessageBubble extends StatefulWidget {
   final Message message;
+  final int receivedCopies;
   final VoidCallback? onTap;
   final VoidCallback? onReply;
   final bool isHighlighted;
@@ -56,6 +57,7 @@ class MessageBubble extends StatefulWidget {
   const MessageBubble({
     super.key,
     required this.message,
+    this.receivedCopies = 1,
     this.onTap,
     this.onReply,
     this.isHighlighted = false,
@@ -104,6 +106,7 @@ class _MessageBubbleState extends State<MessageBubble> {
 
     final textColor =
         baseBodyStyle?.color ?? Theme.of(context).colorScheme.onSurface;
+    final mentionFontSize = (baseBodyStyle?.fontSize ?? 14) - 1;
     final backgroundColor = Theme.of(
       context,
     ).colorScheme.primary.withValues(alpha: 0.12);
@@ -130,8 +133,8 @@ class _MessageBubbleState extends State<MessageBubble> {
           WidgetSpan(
             alignment: PlaceholderAlignment.middle,
             child: Container(
-              margin: const EdgeInsets.symmetric(horizontal: 1, vertical: 1),
-              padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 3),
+              margin: const EdgeInsets.symmetric(horizontal: 1),
+              padding: const EdgeInsets.symmetric(horizontal: 6, vertical: 1),
               decoration: BoxDecoration(
                 color: backgroundColor,
                 borderRadius: BorderRadius.circular(999),
@@ -141,8 +144,9 @@ class _MessageBubbleState extends State<MessageBubble> {
                 '@$mentionName',
                 style: baseBodyStyle?.copyWith(
                   color: textColor,
-                  fontWeight: FontWeight.w700,
-                  height: 1.1,
+                  fontSize: mentionFontSize,
+                  fontWeight: FontWeight.w600,
+                  height: 1.0,
                 ),
               ),
             ),
@@ -574,6 +578,7 @@ class _MessageBubbleState extends State<MessageBubble> {
       'Sender to receipt ms: ${receptionDetails?.senderToReceiptMs ?? '-'}',
       'Estimated transmit ms: ${receptionDetails?.estimatedTransmitMs ?? '-'}',
       'Post-transmit delay ms: ${receptionDetails?.postTransmitDelayMs ?? '-'}',
+      'Received copies: ${widget.receivedCopies}',
       'Expected ACK tag: ${widget.message.expectedAckTag ?? '-'}',
       'Suggested timeout ms: ${widget.message.suggestedTimeoutMs ?? '-'}',
       'Round-trip ms: ${widget.message.roundTripTimeMs ?? '-'}',
@@ -844,6 +849,12 @@ class _MessageBubbleState extends State<MessageBubble> {
                                   receptionDetails!.postTransmitDelayMs!,
                                 ),
                               ),
+                            if (widget.receivedCopies > 1)
+                              _detailRow(
+                                context,
+                                label: 'Received copies',
+                                value: '${widget.receivedCopies}',
+                              ),
                             if (widget.message.suggestedTimeoutMs != null)
                               _detailRow(
                                 context,
@@ -1788,6 +1799,7 @@ class _MessageBubbleState extends State<MessageBubble> {
         receptionDetails?.rssiDbm ??
         matchedRxLog?.logRxDataInfo?.rssiDbm ??
         message.lastEchoRssiDbm;
+    final routeMetadata = messagesProvider.getMessageRouteMetadata(message.id);
 
     // Look up contact information for rich display name
     final contactsProvider = context.read<ContactsProvider>();
@@ -2071,9 +2083,11 @@ class _MessageBubbleState extends State<MessageBubble> {
                         Expanded(
                           child: Text(
                             displayName,
-                            style: Theme.of(context).textTheme.labelMedium
+                            style: Theme.of(context).textTheme.bodySmall
                                 ?.copyWith(
+                                  fontSize: 12,
                                   fontWeight: FontWeight.bold,
+                                  height: 1.1,
                                   color: isOwnMessage
                                       ? Theme.of(context).colorScheme.primary
                                       : null,
@@ -2515,7 +2529,7 @@ class _MessageBubbleState extends State<MessageBubble> {
                                   switch (recipient.deliveryStatus) {
                                     case MessageDeliveryStatus.delivered:
                                       statusColor = Colors.green;
-                                      statusIcon = Icons.check_circle;
+                                      statusIcon = Icons.done_all;
                                       statusText =
                                           recipient.roundTripTimeMs != null
                                           ? '${recipient.roundTripTimeMs}ms'
@@ -2523,6 +2537,15 @@ class _MessageBubbleState extends State<MessageBubble> {
                                               context,
                                             )!.delivered;
                                       break;
+                                    case MessageDeliveryStatus.sent:
+                                      statusColor = Theme.of(
+                                        context,
+                                      ).colorScheme.onSurfaceVariant;
+                                      statusIcon = Icons.done;
+                                      statusText = AppLocalizations.of(
+                                        context,
+                                      )!.sent;
+                                      break;
                                     case MessageDeliveryStatus.failed:
                                       statusColor = Colors.red;
                                       statusIcon = Icons.cancel;
@@ -2531,7 +2554,6 @@ class _MessageBubbleState extends State<MessageBubble> {
                                       )!.failed;
                                       break;
                                     case MessageDeliveryStatus.sending:
-                                    case MessageDeliveryStatus.sent:
                                     default:
                                       statusColor = Colors.orange;
                                       statusIcon = Icons.schedule;
@@ -2726,6 +2748,7 @@ class _MessageBubbleState extends State<MessageBubble> {
           context,
           message: message,
           isSarMarker: isSarMarker,
+          routeMetadata: routeMetadata,
         ),
       ],
     );

lib/widgets/messages/message_bubble_header.dart

@@ -2,6 +2,7 @@ import 'package:flutter/material.dart';
 
 import '../../models/contact.dart';
 import '../../models/message.dart';
+import '../../models/message_route_metadata.dart';
 import '../../utils/avatar_label_helper.dart';
 import '../../utils/message_extensions.dart';
 import '../common/contact_avatar.dart';
@@ -59,6 +60,7 @@ Widget buildBubbleMetaFooter(
   BuildContext context, {
   required Message message,
   required bool isSarMarker,
+  MessageRouteMetadata? routeMetadata,
 }) {
   final metaColor = Theme.of(
     context,
@@ -86,12 +88,13 @@ Widget buildBubbleMetaFooter(
         ).textTheme.labelSmall?.copyWith(color: metaColor),
       ),
     ]);
-  } else if (!isSarMarker && message.pathLen < 255) {
+  } else if (!isSarMarker && _effectivePathLen(message, routeMetadata) < 255) {
+    final effectivePathLen = _effectivePathLen(message, routeMetadata);
     items.addAll([
       Icon(Icons.alt_route, size: 11, color: metaColor),
       const SizedBox(width: 3),
       Text(
-        message.pathLen == 0 ? 'direct' : '${message.pathLen}hop',
+        effectivePathLen == 0 ? 'direct' : '${effectivePathLen}hop',
         style: Theme.of(
           context,
         ).textTheme.labelSmall?.copyWith(color: metaColor),
@@ -124,17 +127,27 @@ Widget buildBubbleMetaFooter(
   );
 }
 
+int _effectivePathLen(Message message, MessageRouteMetadata? routeMetadata) =>
+    routeMetadata?.hopCount ?? message.pathLen;
+
 Widget buildChannelHeaderPill(
   BuildContext context, {
   required String label,
   IconData icon = Icons.campaign_outlined,
+  EdgeInsetsGeometry padding = const EdgeInsets.symmetric(
+    horizontal: 8,
+    vertical: 3,
+  ),
+  double iconSize = 11,
+  double iconSpacing = 5,
+  TextStyle? textStyle,
 }) {
   final labelColor = Theme.of(
     context,
   ).textTheme.labelSmall?.color?.withValues(alpha: 0.82);
 
   return Container(
-    padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 3),
+    padding: padding,
     decoration: BoxDecoration(
       color: Theme.of(
         context,
@@ -146,19 +159,21 @@ Widget buildChannelHeaderPill(
       children: [
         Icon(
           icon,
-          size: 11,
+          size: iconSize,
           color: Theme.of(
             context,
           ).textTheme.labelSmall?.color?.withValues(alpha: 0.7),
         ),
-        const SizedBox(width: 5),
+        SizedBox(width: iconSpacing),
         Flexible(
           child: Text(
             label,
-            style: Theme.of(context).textTheme.labelSmall?.copyWith(
-              color: labelColor,
-              fontWeight: FontWeight.w600,
-            ),
+            style:
+                textStyle ??
+                Theme.of(context).textTheme.labelSmall?.copyWith(
+                  color: labelColor,
+                  fontWeight: FontWeight.w600,
+                ),
             maxLines: 1,
             overflow: TextOverflow.ellipsis,
           ),
@@ -176,5 +191,16 @@ Widget buildDirectHeaderCounterpart(
     context,
     label: label,
     icon: Icons.alternate_email,
+    padding: const EdgeInsets.symmetric(horizontal: 6, vertical: 2),
+    iconSize: 10,
+    iconSpacing: 4,
+    textStyle: Theme.of(context).textTheme.labelSmall?.copyWith(
+      fontSize: 10,
+      height: 1.0,
+      color: Theme.of(
+        context,
+      ).textTheme.labelSmall?.color?.withValues(alpha: 0.82),
+      fontWeight: FontWeight.w600,
+    ),
   );
 }

lib/widgets/messages/message_bubble_signal.dart

@@ -2,6 +2,7 @@ import 'package:flutter/material.dart';
 import 'package:provider/provider.dart';
 
 import '../../models/message.dart';
+import '../../models/message_route_metadata.dart';
 import '../../models/path_selection.dart';
 import '../../models/message_reception_details.dart';
 import '../../providers/messages_provider.dart';
@@ -209,7 +210,7 @@ Widget buildSentDirectSignalStatus(
       _techChip(
         context,
         icon: Icons.alt_route,
-        label: hopDisplayLabel(message),
+        label: hopDisplayLabelForMessage(message, routeMetadata),
         color: Colors.indigo,
       ),
       _techChip(
@@ -294,6 +295,17 @@ String hopDisplayLabel(Message message) {
   return '${message.pathLen} hop${message.pathLen == 1 ? '' : 's'}';
 }
 
+String hopDisplayLabelForMessage(
+  Message message,
+  MessageRouteMetadata? routeMetadata,
+) {
+  final effectivePathLen = routeMetadata?.hopCount ?? message.pathLen;
+  if (effectivePathLen == 0) return 'Direct';
+  if (effectivePathLen >= 255 && message.isContactMessage) return 'Direct';
+  if (effectivePathLen >= 255) return 'Unknown';
+  return '$effectivePathLen hop${effectivePathLen == 1 ? '' : 's'}';
+}
+
 Widget _techChip(
   BuildContext context, {
   required IconData icon,

lib/widgets/messages/message_trace_sheet.dart

@@ -10,14 +10,31 @@ import '../../models/ble_packet_log.dart';
 import '../../models/message.dart';
 import '../../providers/connection_provider.dart';
 import '../../providers/contacts_provider.dart';
+import '../../providers/messages_provider.dart';
 import '../../services/mesh_map_nodes_service.dart';
 import '../../services/route_hash_preferences.dart';
 import '../../utils/log_rx_route_decoder.dart';
+import '../../utils/trace_node_resolver.dart';
 
 class MessageTraceSheet extends StatefulWidget {
-  final Message message;
+  final Message? message;
+  final List<int>? packetPathOverride;
+  final String? descriptionOverride;
+  final String? noRelayMatchTextOverride;
 
-  const MessageTraceSheet({super.key, required this.message});
+  const MessageTraceSheet({super.key, required this.message})
+    : assert(message != null),
+      packetPathOverride = null,
+      descriptionOverride = null,
+      noRelayMatchTextOverride = null;
+
+  const MessageTraceSheet.packetPath({
+    super.key,
+    required List<int> packetPath,
+    this.descriptionOverride,
+    this.noRelayMatchTextOverride,
+  }) : message = null,
+       packetPathOverride = packetPath;
 
   @override
   State<MessageTraceSheet> createState() => _MessageTraceSheetState();
@@ -25,6 +42,7 @@ class MessageTraceSheet extends StatefulWidget {
 
 class _MessageTraceSheetState extends State<MessageTraceSheet> {
   late final Future<_TraceResult> _future;
+  _TraceResult? _traceOverride;
 
   @override
   void initState() {
@@ -35,20 +53,34 @@ class _MessageTraceSheetState extends State<MessageTraceSheet> {
   Future<_TraceResult> _loadTrace() async {
     final connectionProvider = context.read<ConnectionProvider>();
     final contactsProvider = context.read<ContactsProvider>();
+    final messagesProvider = context.read<MessagesProvider>();
     final preferredHashSize = await RouteHashPreferences.getHashSize();
-    final packetPath = _extractPathFromPacketLogs(
-      logs: connectionProvider.bleService.packetLogs,
-      message: widget.message,
-    );
+    List<int>? packetPath = widget.packetPathOverride;
+    String? senderPrefix;
+    String? recipientPrefix;
 
-    final senderPrefix = _toPrefixHex(widget.message.senderPublicKeyPrefix);
-    final recipientPrefix = widget.message.recipientPublicKey != null
-        ? _toPrefixHex(widget.message.recipientPublicKey)
-        : _toPrefixHex(connectionProvider.deviceInfo.publicKey);
+    if (widget.message case final message?) {
+      final storedPath = messagesProvider
+          .getMessageReceptionDetails(message.id)
+          ?.pathBytes;
+      packetPath = (storedPath != null && storedPath.isNotEmpty)
+          ? storedPath
+          : _extractPathFromPacketLogs(
+              logs: connectionProvider.bleService.packetLogs,
+              message: message,
+            );
+
+      senderPrefix = _toPrefixHex(message.senderPublicKeyPrefix);
+      recipientPrefix = message.recipientPublicKey != null
+          ? _toPrefixHex(message.recipientPublicKey)
+          : _toPrefixHex(connectionProvider.deviceInfo.publicKey);
+    }
 
     final localNodes = _localNodesFromContacts(contactsProvider);
+    final localPublicKeys = localNodes.map((node) => node.publicKey).toSet();
     var trace = _buildTraceResult(
       nodes: localNodes,
+      localPublicKeys: localPublicKeys,
       packetPath: packetPath,
       preferredHashSize: preferredHashSize,
       senderPrefix: senderPrefix,
@@ -56,7 +88,9 @@ class _MessageTraceSheetState extends State<MessageTraceSheet> {
     );
     if (_isCompleteTrace(
       trace,
-      expectedRelayCount: math.max(0, widget.message.pathLen),
+      expectedRelayCount: widget.message == null
+          ? 0
+          : math.max(0, widget.message!.pathLen),
     )) {
       return trace;
     }
@@ -72,6 +106,7 @@ class _MessageTraceSheetState extends State<MessageTraceSheet> {
     );
     trace = _buildTraceResult(
       nodes: _mergeNodes(localNodes, remoteNodes),
+      localPublicKeys: localPublicKeys,
       packetPath: packetPath,
       preferredHashSize: preferredHashSize,
       senderPrefix: senderPrefix,
@@ -104,11 +139,11 @@ class _MessageTraceSheetState extends State<MessageTraceSheet> {
             );
           }
 
-          final trace = snapshot.data!;
+          final trace = _traceOverride ?? snapshot.data!;
           final routeEntries = _displayRouteEntries(trace);
           final concretePathNodes = routeEntries
-              .where((entry) => entry.node != null)
-              .map((entry) => entry.node!)
+              .where((entry) => entry.resolved.node != null)
+              .map((entry) => entry.resolved.node!)
               .toList();
           final mapPoints = concretePathNodes
               .map((n) => LatLng(n.latitude, n.longitude))
@@ -142,9 +177,10 @@ class _MessageTraceSheetState extends State<MessageTraceSheet> {
                 Padding(
                   padding: const EdgeInsets.symmetric(horizontal: 16),
                   child: Text(
-                    trace.mode == TraceMode.packetPath
-                        ? 'Route from packet path bytes'
-                        : 'Route inferred from hop count (${widget.message.pathLen})',
+                    widget.descriptionOverride ??
+                        (trace.mode == TraceMode.packetPath
+                            ? 'Relay path from packet path bytes'
+                            : 'Relay path inferred from hop count (${widget.message!.pathLen})'),
                     style: Theme.of(context).textTheme.bodySmall,
                   ),
                 ),
@@ -211,14 +247,7 @@ class _MessageTraceSheetState extends State<MessageTraceSheet> {
                                                   child: CircleAvatar(
                                                     radius: 16,
                                                     backgroundColor:
-                                                        entry.key == 0
-                                                        ? Colors.green
-                                                        : (entry.key ==
-                                                                  concretePathNodes
-                                                                          .length -
-                                                                      1
-                                                              ? Colors.red
-                                                              : Colors.blue),
+                                                        Colors.blue,
                                                     child: Text(
                                                       '${entry.key + 1}',
                                                       style: const TextStyle(
@@ -248,29 +277,35 @@ class _MessageTraceSheetState extends State<MessageTraceSheet> {
                       Padding(
                         padding: const EdgeInsets.symmetric(horizontal: 16),
                         child: Text(
-                          'Route',
+                          'Relay path',
                           style: Theme.of(context).textTheme.titleMedium,
                         ),
                       ),
                       if (routeEntries.isEmpty)
-                        const Padding(
-                          padding: EdgeInsets.symmetric(
+                        Padding(
+                          padding: const EdgeInsets.symmetric(
                             horizontal: 16,
                             vertical: 8,
                           ),
                           child: Text(
-                            'No named nodes could be matched for this trace.',
+                            widget.noRelayMatchTextOverride ??
+                                'No named nodes could be matched for this trace.',
                           ),
                         ),
                       ...routeEntries.asMap().entries.map(
                         (entry) => ListTile(
+                          onTap: entry.value.resolved.canCycle
+                              ? () => setState(() {
+                                  final baseTrace =
+                                      _traceOverride ?? snapshot.data!;
+                                  _traceOverride = baseTrace.cycleEntry(
+                                    entry.value.target,
+                                  );
+                                })
+                              : null,
                           leading: CircleAvatar(
                             radius: 14,
-                            backgroundColor: entry.key == 0
-                                ? Colors.green
-                                : (entry.key == routeEntries.length - 1
-                                      ? Colors.red
-                                      : Colors.blue),
+                            backgroundColor: Colors.blue,
                             child: Text(
                               '${entry.key + 1}',
                               style: const TextStyle(
@@ -282,8 +317,11 @@ class _MessageTraceSheetState extends State<MessageTraceSheet> {
                           ),
                           title: Text(entry.value.label),
                           subtitle: Text(
-                            '${_routeRoleLabel(entry.key, routeEntries.length)}${entry.value.keyLabel == null ? '' : ' • ${entry.value.keyLabel}'}',
+                            'Relay${entry.value.keyLabel == null ? '' : ' • ${entry.value.keyLabel}'}${entry.value.matchSummary == null ? '' : ' • ${entry.value.matchSummary}'}${entry.value.resolved.cycleSummary == null ? '' : ' • ${entry.value.resolved.cycleSummary}'}',
                           ),
+                          trailing: entry.value.resolved.canCycle
+                              ? const Icon(Icons.sync_alt)
+                              : null,
                         ),
                       ),
                       const SizedBox(height: 12),
@@ -326,10 +364,16 @@ class _MessageTraceSheetState extends State<MessageTraceSheet> {
   }
 
   List<MeshMapNode> _relayNodes(_TraceResult trace) {
-    final concrete = trace.matchedPathNodes.whereType<MeshMapNode>().toList();
+    final concrete = trace.matchedPathNodes
+        .map((entry) => entry.node)
+        .whereType<MeshMapNode>()
+        .toList();
     if (concrete.isEmpty) return const [];
 
     if (trace.mode == TraceMode.packetPath) {
+      if (widget.message == null) {
+        return concrete;
+      }
       if (concrete.length <= 1) return const [];
       return concrete.sublist(1);
     }
@@ -339,55 +383,37 @@ class _MessageTraceSheetState extends State<MessageTraceSheet> {
   }
 
   List<_RouteDisplayEntry> _displayRouteEntries(_TraceResult trace) {
-    final pathNodes = trace.matchedPathNodes.whereType<MeshMapNode>().toList();
-    if (pathNodes.isEmpty) {
-      return [
-        if (trace.sender != null) _RouteDisplayEntry.fromNode(trace.sender!),
-        if (trace.recipient != null &&
-            trace.recipient!.publicKey != trace.sender?.publicKey)
-          _RouteDisplayEntry.fromNode(trace.recipient!),
-      ];
-    }
-
     if (trace.mode == TraceMode.packetPath) {
-      final entries = trace.matchedPathNodes.asMap().entries.map((entry) {
+      return trace.matchedPathNodes.asMap().entries.map((entry) {
         final hashHex = trace.pathHashes[entry.key].toUpperCase();
         return _RouteDisplayEntry(
-          node: entry.value,
-          label: entry.value?.name ?? 'Unknown',
-          keyLabel: entry.value != null
-              ? _prefixKeyLabel(entry.value!.publicKey)
+          resolved: entry.value,
+          label: entry.value.node?.name ?? 'Unknown',
+          keyLabel: entry.value.node != null
+              ? _prefixKeyLabel(entry.value.node!.publicKey)
               : hashHex,
+          matchSummary: entry.value.matchSummary,
+          target: _RouteEntryTarget.pathNode(entry.key),
         );
       }).toList();
-      final lastKey = pathNodes.last.publicKey;
-      return [
-        ...entries,
-        if (trace.recipient != null && trace.recipient!.publicKey != lastKey)
-          _RouteDisplayEntry.fromNode(trace.recipient!),
-      ];
     }
 
-    final firstKey = pathNodes.first.publicKey;
-    final lastKey = pathNodes.last.publicKey;
-    return [
-      if (trace.sender != null && trace.sender!.publicKey != firstKey)
-        _RouteDisplayEntry.fromNode(trace.sender!),
-      ...pathNodes.map(_RouteDisplayEntry.fromNode),
-      if (trace.recipient != null && trace.recipient!.publicKey != lastKey)
-        _RouteDisplayEntry.fromNode(trace.recipient!),
-    ];
+    return trace.matchedPathNodes
+        .asMap()
+        .entries
+        .where((entry) => entry.value.node != null)
+        .map(
+          (entry) => _RouteDisplayEntry.fromResolved(
+            entry.value,
+            target: _RouteEntryTarget.pathNode(entry.key),
+          ),
+        )
+        .toList();
   }
 
   String _prefixKeyLabel(String publicKey) =>
       publicKey.substring(0, math.min(12, publicKey.length));
 
-  String _routeRoleLabel(int index, int total) {
-    if (index == 0) return 'Sender';
-    if (index == total - 1) return 'Recipient';
-    return 'Relay';
-  }
-
   String? _toPrefixHex(List<int>? key) {
     if (key == null || key.isEmpty) return null;
     final take = key.length < 6 ? key.length : 6;
@@ -398,14 +424,6 @@ class _MessageTraceSheetState extends State<MessageTraceSheet> {
         .toLowerCase();
   }
 
-  MeshMapNode? _bestNodeForPrefix(List<MeshMapNode> nodes, String? prefixHex) {
-    if (prefixHex == null || prefixHex.isEmpty) return null;
-    final matches =
-        nodes.where((n) => n.publicKey.startsWith(prefixHex)).toList()
-          ..sort((a, b) => b.updatedAtMs.compareTo(a.updatedAtMs));
-    return matches.isEmpty ? null : matches.first;
-  }
-
   List<MeshMapNode> _localNodesFromContacts(ContactsProvider contactsProvider) {
     return contactsProvider.contactsWithLocation
         .map((contact) {
@@ -440,13 +458,28 @@ class _MessageTraceSheetState extends State<MessageTraceSheet> {
 
   _TraceResult _buildTraceResult({
     required List<MeshMapNode> nodes,
+    required Set<String> localPublicKeys,
     required List<int>? packetPath,
     required int preferredHashSize,
     required String? senderPrefix,
     required String? recipientPrefix,
   }) {
-    final senderNode = _bestNodeForPrefix(nodes, senderPrefix);
-    final recipientNode = _bestNodeForPrefix(nodes, recipientPrefix);
+    final senderNode = TraceNodeResolver.resolveBest(
+      nodes: nodes,
+      localPublicKeys: localPublicKeys,
+      prefixHex: senderPrefix,
+    );
+    final recipientNode = TraceNodeResolver.resolveBest(
+      nodes: nodes,
+      localPublicKeys: localPublicKeys,
+      prefixHex: recipientPrefix,
+    );
+    final senderLatLng = senderNode.node == null
+        ? null
+        : LatLng(senderNode.node!.latitude, senderNode.node!.longitude);
+    final recipientLatLng = recipientNode.node == null
+        ? null
+        : LatLng(recipientNode.node!.latitude, recipientNode.node!.longitude);
 
     if (packetPath != null && packetPath.isNotEmpty) {
       final hashSize = LogRxRouteDecoder.inferHashSize(
@@ -459,29 +492,43 @@ class _MessageTraceSheetState extends State<MessageTraceSheet> {
       );
       final matched = _matchNodesFromPathHashes(
         nodes: nodes,
+        localPublicKeys: localPublicKeys,
         pathHashes: hopHashes,
         senderPrefix: senderPrefix,
         recipientPrefix: recipientPrefix,
+        senderLatLng: senderLatLng,
+        recipientLatLng: recipientLatLng,
+      );
+      final alignedMatched = TraceNodeResolver.alignPathSelections(
+        nodes: matched,
+        startNode: senderNode.node,
+        endNode: recipientNode.node,
       );
       return _TraceResult(
         mode: TraceMode.packetPath,
         sender: senderNode,
         recipient: recipientNode,
         pathHashes: hopHashes,
-        matchedPathNodes: matched,
+        matchedPathNodes: alignedMatched,
       );
     }
 
     final inferred = _inferRelaysFromHopCount(
       nodes: nodes,
-      sender: senderNode,
-      recipient: recipientNode,
-      relayCount: math.max(0, widget.message.pathLen),
+      sender: senderNode.node,
+      recipient: recipientNode.node,
+      relayCount: math.max(0, widget.message!.pathLen),
     );
-    final matchedPathNodes = <MeshMapNode?>[
-      if (senderNode != null) senderNode,
-      ...inferred,
-      if (recipientNode != null) recipientNode,
+    final matchedPathNodes = <ResolvedTraceNode>[
+      if (senderNode.node != null) senderNode,
+      ...inferred.map(
+        (node) => ResolvedTraceNode(
+          candidates: [node],
+          matchCount: 1,
+          usedOnlineFallback: false,
+        ),
+      ),
+      if (recipientNode.node != null) recipientNode,
     ];
 
     return _TraceResult(
@@ -494,16 +541,17 @@ class _MessageTraceSheetState extends State<MessageTraceSheet> {
   }
 
   bool _isCompleteTrace(_TraceResult trace, {required int expectedRelayCount}) {
-    if (trace.sender == null || trace.recipient == null) {
+    if (trace.sender.node == null || trace.recipient.node == null) {
       return false;
     }
 
     if (trace.mode == TraceMode.packetPath) {
       return trace.matchedPathNodes.length == trace.pathHashes.length &&
-          trace.matchedPathNodes.every((node) => node != null);
+          trace.matchedPathNodes.every((node) => node.node != null);
     }
 
     final concreteCount = trace.matchedPathNodes
+        .map((entry) => entry.node)
         .whereType<MeshMapNode>()
         .length;
     return concreteCount >= expectedRelayCount + 2;
@@ -544,33 +592,30 @@ class _MessageTraceSheetState extends State<MessageTraceSheet> {
     return decoded.pathBytes;
   }
 
-  List<MeshMapNode?> _matchNodesFromPathHashes({
+  List<ResolvedTraceNode> _matchNodesFromPathHashes({
     required List<MeshMapNode> nodes,
+    required Set<String> localPublicKeys,
     required List<String> pathHashes,
     required String? senderPrefix,
     required String? recipientPrefix,
+    required LatLng? senderLatLng,
+    required LatLng? recipientLatLng,
   }) {
-    final result = <MeshMapNode?>[];
+    final result = <ResolvedTraceNode>[];
     for (var i = 0; i < pathHashes.length; i++) {
       final hashHex = pathHashes[i].toLowerCase();
-      final candidates = nodes
-          .where((n) => n.publicKey.startsWith(hashHex))
-          .toList();
-      if (candidates.isEmpty) {
-        result.add(null);
-        continue;
-      }
-
-      List<MeshMapNode> filtered = candidates;
-      if (i == 0 && senderPrefix != null) {
-        final senderMatches = filtered
-            .where((n) => n.publicKey.startsWith(senderPrefix))
-            .toList();
-        if (senderMatches.isNotEmpty) filtered = senderMatches;
-      }
-
-      filtered.sort((a, b) => b.updatedAtMs.compareTo(a.updatedAtMs));
-      result.add(filtered.first);
+      result.add(
+        TraceNodeResolver.resolveBest(
+          nodes: nodes,
+          localPublicKeys: localPublicKeys,
+          prefixHex: hashHex,
+          preferredPrefix: i == 0
+              ? senderPrefix
+              : (i == pathHashes.length - 1 ? recipientPrefix : null),
+          referenceA: senderLatLng,
+          referenceB: recipientLatLng,
+        ),
+      );
     }
     return result;
   }
@@ -639,10 +684,10 @@ enum TraceMode { packetPath, hopCountInference }
 
 class _TraceResult {
   final TraceMode mode;
-  final MeshMapNode? sender;
-  final MeshMapNode? recipient;
+  final ResolvedTraceNode sender;
+  final ResolvedTraceNode recipient;
   final List<String> pathHashes;
-  final List<MeshMapNode?> matchedPathNodes;
+  final List<ResolvedTraceNode> matchedPathNodes;
 
   const _TraceResult({
     required this.mode,
@@ -651,27 +696,66 @@ class _TraceResult {
     required this.pathHashes,
     required this.matchedPathNodes,
   });
+
+  _TraceResult cycleEntry(_RouteEntryTarget target) {
+    switch (target.kind) {
+      case _RouteEntryKind.pathNode:
+        final updated = matchedPathNodes.toList();
+        updated[target.index] = updated[target.index].cycle();
+        return _TraceResult(
+          mode: mode,
+          sender: sender,
+          recipient: recipient,
+          pathHashes: pathHashes,
+          matchedPathNodes: updated,
+        );
+    }
+  }
 }
 
 class _RouteDisplayEntry {
-  final MeshMapNode? node;
+  final ResolvedTraceNode resolved;
   final String label;
   final String? keyLabel;
+  final String? matchSummary;
+  final _RouteEntryTarget target;
 
   const _RouteDisplayEntry({
-    required this.node,
+    required this.resolved,
     required this.label,
     required this.keyLabel,
+    required this.matchSummary,
+    required this.target,
   });
 
-  factory _RouteDisplayEntry.fromNode(MeshMapNode node) {
+  MeshMapNode? get node => resolved.node;
+
+  factory _RouteDisplayEntry.fromResolved(
+    ResolvedTraceNode resolved, {
+    required _RouteEntryTarget target,
+  }) {
+    final node = resolved.node!;
     return _RouteDisplayEntry(
-      node: node,
+      resolved: resolved,
       label: node.name,
       keyLabel: node.publicKey.substring(
         0,
         math.min(12, node.publicKey.length),
       ),
+      matchSummary: resolved.matchSummary,
+      target: target,
     );
   }
 }
+
+enum _RouteEntryKind { pathNode }
+
+class _RouteEntryTarget {
+  final _RouteEntryKind kind;
+  final int index;
+
+  const _RouteEntryTarget._(this.kind, [this.index = 0]);
+
+  const _RouteEntryTarget.pathNode(int index)
+    : this._(_RouteEntryKind.pathNode, index);
+}

lib/widgets/messages/messages_composer.dart

@@ -3,7 +3,9 @@ import 'package:flutter/services.dart';
 import 'package:provider/provider.dart';
 
 import '../../l10n/app_localizations.dart';
+import '../../models/contact.dart';
 import '../../providers/app_provider.dart';
+import '../common/contact_avatar.dart';
 
 class MessagesComposer extends StatelessWidget {
   final TextEditingController textController;
@@ -17,6 +19,9 @@ class MessagesComposer extends StatelessWidget {
   final double bottomPadding;
   final String destinationLabel;
   final Widget destinationAvatar;
+  final List<Contact> mentionSuggestions;
+  final String mentionQuery;
+  final ValueChanged<Contact> onMentionSelected;
   final VoidCallback onShowComposerActions;
   final VoidCallback onShowRecipientSelector;
   final Future<void> Function() onStartVoiceRecording;
@@ -36,6 +41,9 @@ class MessagesComposer extends StatelessWidget {
     required this.bottomPadding,
     required this.destinationLabel,
     required this.destinationAvatar,
+    required this.mentionSuggestions,
+    required this.mentionQuery,
+    required this.onMentionSelected,
     required this.onShowComposerActions,
     required this.onShowRecipientSelector,
     required this.onStartVoiceRecording,
@@ -50,6 +58,15 @@ class MessagesComposer extends StatelessWidget {
       child: Column(
         mainAxisSize: MainAxisSize.min,
         children: [
+          if (mentionSuggestions.isNotEmpty)
+            Padding(
+              padding: const EdgeInsets.fromLTRB(10, 0, 10, 6),
+              child: _MentionSuggestionsCard(
+                suggestions: mentionSuggestions,
+                query: mentionQuery,
+                onSelected: onMentionSelected,
+              ),
+            ),
           SafeArea(
             top: false,
             child: Padding(
@@ -72,7 +89,7 @@ class MessagesComposer extends StatelessWidget {
                   ],
                 ),
                 child: Padding(
-                  padding: const EdgeInsets.fromLTRB(10, 10, 10, 8),
+                  padding: const EdgeInsets.fromLTRB(8, 8, 8, 6),
                   child: Column(
                     mainAxisSize: MainAxisSize.min,
                     crossAxisAlignment: CrossAxisAlignment.stretch,
@@ -95,7 +112,7 @@ class MessagesComposer extends StatelessWidget {
                           ),
                         ],
                       ),
-                      const SizedBox(height: 8),
+                      const SizedBox(height: 6),
                       ListenableBuilder(
                         listenable: Listenable.merge([
                           textController,
@@ -153,6 +170,87 @@ class MessagesComposer extends StatelessWidget {
   }
 }
 
+class _MentionSuggestionsCard extends StatelessWidget {
+  final List<Contact> suggestions;
+  final String query;
+  final ValueChanged<Contact> onSelected;
+
+  const _MentionSuggestionsCard({
+    required this.suggestions,
+    required this.query,
+    required this.onSelected,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    final visibleCount = suggestions.length.clamp(1, 4);
+    final maxHeight = visibleCount * 54.0;
+
+    return Material(
+      elevation: 8,
+      color: Theme.of(context).colorScheme.surface,
+      borderRadius: BorderRadius.circular(18),
+      child: Container(
+        constraints: BoxConstraints(maxHeight: maxHeight),
+        decoration: BoxDecoration(
+          color: Theme.of(context).colorScheme.surface,
+          borderRadius: BorderRadius.circular(18),
+          border: Border.all(
+            color: Theme.of(context).dividerColor.withValues(alpha: 0.30),
+          ),
+        ),
+        child: Column(
+          mainAxisSize: MainAxisSize.min,
+          crossAxisAlignment: CrossAxisAlignment.stretch,
+          children: [
+            Flexible(
+              child: ListView.separated(
+                shrinkWrap: true,
+                padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 2),
+                itemCount: suggestions.length,
+                separatorBuilder: (_, _) => const SizedBox(height: 2),
+                itemBuilder: (context, index) {
+                  final contact = suggestions[index];
+                  return Material(
+                    color: Colors.transparent,
+                    child: InkWell(
+                      borderRadius: BorderRadius.circular(14),
+                      onTap: () => onSelected(contact),
+                      child: Padding(
+                        padding: const EdgeInsets.symmetric(
+                          horizontal: 8,
+                          vertical: 8,
+                        ),
+                        child: Row(
+                          children: [
+                            ContactAvatar(contact: contact, radius: 16),
+                            const SizedBox(width: 10),
+                            Expanded(
+                              child: Text(
+                                contact.displayName,
+                                maxLines: 1,
+                                overflow: TextOverflow.ellipsis,
+                                style: const TextStyle(
+                                  fontSize: 15,
+                                  fontWeight: FontWeight.w500,
+                                ),
+                              ),
+                            ),
+                          ],
+                        ),
+                      ),
+                    ),
+                  );
+                },
+              ),
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+}
+
 class _ComposerActionButton extends StatelessWidget {
   final bool isRecording;
   final VoidCallback onPressed;
@@ -165,8 +263,8 @@ class _ComposerActionButton extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     return Container(
-      width: 42,
-      height: 42,
+      width: 40,
+      height: 40,
       decoration: BoxDecoration(
         color: Theme.of(context).colorScheme.surface,
         shape: BoxShape.circle,
@@ -175,7 +273,7 @@ class _ComposerActionButton extends StatelessWidget {
         ),
       ),
       child: IconButton(
-        icon: Icon(isRecording ? Icons.stop : Icons.add, size: 22),
+        icon: Icon(isRecording ? Icons.stop : Icons.add, size: 20),
         tooltip: isRecording ? 'Stop recording' : 'More actions',
         onPressed: onPressed,
         color: isRecording ? Colors.red : Theme.of(context).colorScheme.primary,
@@ -203,7 +301,7 @@ class _DestinationSelector extends StatelessWidget {
         borderRadius: BorderRadius.circular(20),
         onTap: onTap,
         child: Ink(
-          height: 42,
+          height: 40,
           decoration: BoxDecoration(
             color: Theme.of(context).colorScheme.surface,
             borderRadius: BorderRadius.circular(20),
@@ -212,17 +310,17 @@ class _DestinationSelector extends StatelessWidget {
             ),
           ),
           child: Padding(
-            padding: const EdgeInsets.symmetric(horizontal: 14),
+            padding: const EdgeInsets.symmetric(horizontal: 12),
             child: Row(
               children: [
                 destinationAvatar,
-                const SizedBox(width: 10),
+                const SizedBox(width: 8),
                 Expanded(
                   child: Text(
                     destinationLabel,
                     overflow: TextOverflow.ellipsis,
                     style: TextStyle(
-                      fontSize: 15,
+                      fontSize: 14,
                       fontWeight: FontWeight.w600,
                       color: Theme.of(context).colorScheme.onSurface,
                     ),
@@ -230,7 +328,7 @@ class _DestinationSelector extends StatelessWidget {
                 ),
                 Icon(
                   Icons.expand_more_rounded,
-                  size: 20,
+                  size: 18,
                   color: Theme.of(context).colorScheme.onSurfaceVariant,
                 ),
               ],
@@ -261,7 +359,7 @@ class _MessageInput extends StatelessWidget {
 
     return AnimatedContainer(
       duration: const Duration(milliseconds: 180),
-      constraints: const BoxConstraints(minHeight: 46, maxHeight: 132),
+      constraints: const BoxConstraints(minHeight: 42, maxHeight: 116),
       decoration: BoxDecoration(
         color: Theme.of(context).colorScheme.surface,
         borderRadius: BorderRadius.circular(24),
@@ -284,7 +382,7 @@ class _MessageInput extends StatelessWidget {
             : null,
       ),
       child: Padding(
-        padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 12),
+        padding: const EdgeInsets.symmetric(horizontal: 14, vertical: 10),
         child: TextField(
           controller: textController,
           focusNode: focusNode,
@@ -375,8 +473,8 @@ class _SendButton extends StatelessWidget {
             children: [
               AnimatedContainer(
                 duration: const Duration(milliseconds: 180),
-                width: 46,
-                height: 46,
+                width: 42,
+                height: 42,
                 decoration: BoxDecoration(
                   color: canSendText || isRecording
                       ? Theme.of(context).colorScheme.primary
@@ -410,7 +508,7 @@ class _SendButton extends StatelessWidget {
                       )
                     : Icon(
                         isRecording ? Icons.mic_rounded : Icons.send_rounded,
-                        size: 22,
+                        size: 20,
                         color: canSendText || isRecording
                             ? Theme.of(context).colorScheme.onPrimary
                             : Theme.of(context).colorScheme.onSurfaceVariant,

lib/widgets/messages/messages_content.dart

@@ -2,12 +2,14 @@ import 'package:flutter/material.dart';
 
 import '../../l10n/app_localizations.dart';
 import '../../models/message.dart';
+import '../../providers/messages_provider.dart';
+import '../common/bidirectional_refresh.dart';
 import '../../widgets/messages/message_bubble.dart';
 
 class MessagesContent extends StatelessWidget {
   static const double defaultPadding = 8;
 
-  final List<Message> messages;
+  final List<DisplayMessageEntry> messages;
   final ScrollController scrollController;
   final String? highlightedMessageId;
   final double bottomContentPadding;
@@ -30,14 +32,18 @@ class MessagesContent extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    return RefreshIndicator(
+    const scrollPhysics = BouncingScrollPhysics(
+      parent: AlwaysScrollableScrollPhysics(),
+    );
+
+    return BidirectionalRefresh(
       onRefresh: onRefresh,
       child: messages.isEmpty
           ? LayoutBuilder(
               builder: (context, constraints) => SingleChildScrollView(
                 keyboardDismissBehavior:
                     ScrollViewKeyboardDismissBehavior.onDrag,
-                physics: const AlwaysScrollableScrollPhysics(),
+                physics: scrollPhysics,
                 child: ConstrainedBox(
                   constraints: BoxConstraints(minHeight: constraints.maxHeight),
                   child: Center(
@@ -69,6 +75,7 @@ class MessagesContent extends StatelessWidget {
           : ListView.builder(
               controller: scrollController,
               keyboardDismissBehavior: ScrollViewKeyboardDismissBehavior.onDrag,
+              physics: scrollPhysics,
               reverse: true,
               padding: EdgeInsets.fromLTRB(
                 defaultPadding,
@@ -78,11 +85,13 @@ class MessagesContent extends StatelessWidget {
               ),
               itemCount: messages.length,
               itemBuilder: (context, index) {
-                final message = messages[index];
+                final entry = messages[index];
+                final message = entry.message;
 
                 return MessageBubble(
                   key: ValueKey(message.id),
                   message: message,
+                  receivedCopies: entry.occurrenceCount,
                   isHighlighted: message.id == highlightedMessageId,
                   onNavigateToMap: onNavigateToMap,
                   onTap: onMessageTap == null

lib/widgets/messages/recipient_selector_sheet.dart

@@ -12,6 +12,7 @@ class RecipientSelectorSheet extends StatefulWidget {
   final Map<String, int> unreadCountsByPublicKey;
   final String? currentDestinationType;
   final String? currentRecipientPublicKey;
+  final bool showAllOption;
   final Function(String type, Contact? recipient) onSelect;
 
   const RecipientSelectorSheet({
@@ -23,6 +24,7 @@ class RecipientSelectorSheet extends StatefulWidget {
     required this.unreadCountsByPublicKey,
     this.currentDestinationType,
     this.currentRecipientPublicKey,
+    this.showAllOption = true,
     required this.onSelect,
   });
 
@@ -61,6 +63,11 @@ class _RecipientSelectorSheetState extends State<RecipientSelectorSheet> {
     final filteredContacts = _filterContacts(widget.contacts);
     final filteredRooms = _filterContacts(widget.rooms);
     final filteredChannels = _filterContacts(widget.channels);
+    final showChannelsSection = widget.channels.isNotEmpty;
+    final showContactsSection = widget.contacts.isNotEmpty;
+    final showRoomsSection = widget.rooms.isNotEmpty;
+    final showAnyRecipients =
+        showChannelsSection || showContactsSection || showRoomsSection;
 
     return Container(
       constraints: BoxConstraints(
@@ -142,21 +149,23 @@ class _RecipientSelectorSheetState extends State<RecipientSelectorSheet> {
             child: ListView(
               shrinkWrap: true,
               children: [
-                _buildOptionTile(
-                  context: context,
-                  icon: Icons.all_inbox,
-                  title: l10n.showAll,
-                  subtitle: 'All messages',
-                  unreadCount: widget.unreadCount,
-                  isSelected: _isSelected('all', null),
-                  onTap: () {
-                    widget.onSelect('all', null);
-                    Navigator.pop(context);
-                  },
-                ),
-                const Divider(),
+                if (widget.showAllOption) ...[
+                  _buildOptionTile(
+                    context: context,
+                    icon: Icons.all_inbox,
+                    title: l10n.showAll,
+                    subtitle: 'All messages',
+                    unreadCount: widget.unreadCount,
+                    isSelected: _isSelected('all', null),
+                    onTap: () {
+                      widget.onSelect('all', null);
+                      Navigator.pop(context);
+                    },
+                  ),
+                  if (showAnyRecipients) const Divider(),
+                ],
                 // Channels section
-                if (widget.channels.isNotEmpty) ...[
+                if (showChannelsSection) ...[
                   Padding(
                     padding: const EdgeInsets.symmetric(
                       horizontal: 16,
@@ -204,10 +213,12 @@ class _RecipientSelectorSheetState extends State<RecipientSelectorSheet> {
                     }),
                 ],
 
-                const Divider(),
+                if (showChannelsSection &&
+                    (showContactsSection || showRoomsSection))
+                  const Divider(),
 
                 // Contacts section
-                if (widget.contacts.isNotEmpty) ...[
+                if (showContactsSection) ...[
                   Padding(
                     padding: const EdgeInsets.symmetric(
                       horizontal: 16,
@@ -253,10 +264,10 @@ class _RecipientSelectorSheetState extends State<RecipientSelectorSheet> {
                     }),
                 ],
 
-                const Divider(),
+                if (showContactsSection && showRoomsSection) const Divider(),
 
                 // Rooms section
-                if (widget.rooms.isNotEmpty) ...[
+                if (showRoomsSection) ...[
                   Padding(
                     padding: const EdgeInsets.symmetric(
                       horizontal: 16,
@@ -302,9 +313,7 @@ class _RecipientSelectorSheetState extends State<RecipientSelectorSheet> {
                 ],
 
                 // Empty state
-                if (widget.contacts.isEmpty &&
-                    widget.rooms.isEmpty &&
-                    widget.channels.isEmpty) ...[
+                if (!showAnyRecipients) ...[
                   Padding(
                     padding: const EdgeInsets.all(32),
                     child: Column(

macos/Podfile.lock

@@ -8,6 +8,10 @@ PODS:
     - FlutterMacOS
   - file_picker (0.0.1):
     - FlutterMacOS
+  - file_selector_macos (0.0.1):
+    - FlutterMacOS
+  - flutter_avif_macos (0.0.1):
+    - FlutterMacOS
   - flutter_blue_plus_darwin (0.0.2):
     - Flutter
     - FlutterMacOS
@@ -19,10 +23,6 @@ PODS:
     - FlutterMacOS
   - nsd_macos (0.0.1):
     - FlutterMacOS
-  - ObjectBox (4.4.1)
-  - objectbox_flutter_libs (0.0.1):
-    - FlutterMacOS
-    - ObjectBox (= 4.4.1)
   - package_info_plus (0.0.1):
     - FlutterMacOS
   - path_provider_foundation (0.0.1):
@@ -35,6 +35,9 @@ PODS:
   - shared_preferences_foundation (0.0.1):
     - Flutter
     - FlutterMacOS
+  - sqflite_darwin (0.0.4):
+    - Flutter
+    - FlutterMacOS
   - url_launcher_macos (0.0.1):
     - FlutterMacOS
 
@@ -43,23 +46,21 @@ DEPENDENCIES:
   - codec2_flutter (from `Flutter/ephemeral/.symlinks/plugins/codec2_flutter/macos`)
   - device_info_plus (from `Flutter/ephemeral/.symlinks/plugins/device_info_plus/macos`)
   - file_picker (from `Flutter/ephemeral/.symlinks/plugins/file_picker/macos`)
+  - file_selector_macos (from `Flutter/ephemeral/.symlinks/plugins/file_selector_macos/macos`)
+  - flutter_avif_macos (from `Flutter/ephemeral/.symlinks/plugins/flutter_avif_macos/macos`)
   - flutter_blue_plus_darwin (from `Flutter/ephemeral/.symlinks/plugins/flutter_blue_plus_darwin/darwin`)
   - flutter_local_notifications (from `Flutter/ephemeral/.symlinks/plugins/flutter_local_notifications/macos`)
   - FlutterMacOS (from `Flutter/ephemeral`)
   - geolocator_apple (from `Flutter/ephemeral/.symlinks/plugins/geolocator_apple/darwin`)
   - nsd_macos (from `Flutter/ephemeral/.symlinks/plugins/nsd_macos/macos`)
-  - objectbox_flutter_libs (from `Flutter/ephemeral/.symlinks/plugins/objectbox_flutter_libs/macos`)
   - package_info_plus (from `Flutter/ephemeral/.symlinks/plugins/package_info_plus/macos`)
   - path_provider_foundation (from `Flutter/ephemeral/.symlinks/plugins/path_provider_foundation/darwin`)
   - record_macos (from `Flutter/ephemeral/.symlinks/plugins/record_macos/macos`)
   - share_plus (from `Flutter/ephemeral/.symlinks/plugins/share_plus/macos`)
   - shared_preferences_foundation (from `Flutter/ephemeral/.symlinks/plugins/shared_preferences_foundation/darwin`)
+  - sqflite_darwin (from `Flutter/ephemeral/.symlinks/plugins/sqflite_darwin/darwin`)
   - url_launcher_macos (from `Flutter/ephemeral/.symlinks/plugins/url_launcher_macos/macos`)
 
-SPEC REPOS:
-  trunk:
-    - ObjectBox
-
 EXTERNAL SOURCES:
   audioplayers_darwin:
     :path: Flutter/ephemeral/.symlinks/plugins/audioplayers_darwin/darwin
@@ -69,6 +70,10 @@ EXTERNAL SOURCES:
     :path: Flutter/ephemeral/.symlinks/plugins/device_info_plus/macos
   file_picker:
     :path: Flutter/ephemeral/.symlinks/plugins/file_picker/macos
+  file_selector_macos:
+    :path: Flutter/ephemeral/.symlinks/plugins/file_selector_macos/macos
+  flutter_avif_macos:
+    :path: Flutter/ephemeral/.symlinks/plugins/flutter_avif_macos/macos
   flutter_blue_plus_darwin:
     :path: Flutter/ephemeral/.symlinks/plugins/flutter_blue_plus_darwin/darwin
   flutter_local_notifications:
@@ -79,8 +84,6 @@ EXTERNAL SOURCES:
     :path: Flutter/ephemeral/.symlinks/plugins/geolocator_apple/darwin
   nsd_macos:
     :path: Flutter/ephemeral/.symlinks/plugins/nsd_macos/macos
-  objectbox_flutter_libs:
-    :path: Flutter/ephemeral/.symlinks/plugins/objectbox_flutter_libs/macos
   package_info_plus:
     :path: Flutter/ephemeral/.symlinks/plugins/package_info_plus/macos
   path_provider_foundation:
@@ -91,28 +94,31 @@ EXTERNAL SOURCES:
     :path: Flutter/ephemeral/.symlinks/plugins/share_plus/macos
   shared_preferences_foundation:
     :path: Flutter/ephemeral/.symlinks/plugins/shared_preferences_foundation/darwin
+  sqflite_darwin:
+    :path: Flutter/ephemeral/.symlinks/plugins/sqflite_darwin/darwin
   url_launcher_macos:
     :path: Flutter/ephemeral/.symlinks/plugins/url_launcher_macos/macos
 
 SPEC CHECKSUMS:
-  audioplayers_darwin: 4f9ca89d92d3d21cec7ec580e78ca888e5fb68bd
+  audioplayers_darwin: 835ced6edd4c9fc8ebb0a7cc9e294a91d99917d5
   codec2_flutter: 50d930e6a1a187f05891b89300c6ef589651bfbd
   device_info_plus: 4fb280989f669696856f8b129e4a5e3cd6c48f76
   file_picker: 7584aae6fa07a041af2b36a2655122d42f578c1a
+  file_selector_macos: 9e9e068e90ebee155097d00e89ae91edb2374db7
+  flutter_avif_macos: 9ed61d67adfbd6964eccb59971020fb55c31fc11
   flutter_blue_plus_darwin: 20a08bfeaa0f7804d524858d3d8744bcc1b6dbc3
-  flutter_local_notifications: 4bf37a31afde695b56091b4ae3e4d9c7a7e6cda0
+  flutter_local_notifications: 1fc7ffb10a83d6a2eeeeddb152d43f1944b0aad0
   FlutterMacOS: d0db08ddef1a9af05a5ec4b724367152bb0500b1
   geolocator_apple: ab36aa0e8b7d7a2d7639b3b4e48308394e8cef5e
   nsd_macos: a472240e770b92f6c6df1022403aa29c90d012e3
-  ObjectBox: 7da4aceb5013d041bfafdbc6d744a26918b09757
-  objectbox_flutter_libs: f51d18f6a4b5965c218843373b7dc5ed5e3a2008
   package_info_plus: f0052d280d17aa382b932f399edf32507174e870
   path_provider_foundation: bb55f6dbba17d0dccd6737fe6f7f34fbd0376880
   record_macos: 7f227161b93c49e7e34fe681c5891c8622c8cc8b
   share_plus: 510bf0af1a42cd602274b4629920c9649c52f4cc
   shared_preferences_foundation: 7036424c3d8ec98dfe75ff1667cb0cd531ec82bb
+  sqflite_darwin: 20b2a3a3b70e43edae938624ce550a3cbf66a3d0
   url_launcher_macos: f87a979182d112f911de6820aefddaf56ee9fbfd
 
-PODFILE CHECKSUM: 54d867c82ac51cbd61b565781b9fada492027009
+PODFILE CHECKSUM: e3de8f2486e300492cc80a2fe0576e9d269ba22b
 
 COCOAPODS: 1.16.2

pubspec.lock

@@ -631,14 +631,6 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.6.0"
-  http_methods:
-    dependency: transitive
-    description:
-      name: http_methods
-      sha256: "6bccce8f1ec7b5d701e7921dca35e202d425b57e317ba1a37f2638590e29e566"
-      url: "https://pub.dev"
-    source: hosted
-    version: "1.1.1"
   http_parser:
     dependency: transitive
     description:
@@ -795,8 +787,8 @@ packages:
     dependency: "direct main"
     description:
       path: "."
-      ref: main
-      resolved-ref: bd3744ee21376b81be5f852cd0c1a82c0df40460
+      ref: f600789fac7f743b1c7db8aa24e441405413f669
+      resolved-ref: f600789fac7f743b1c7db8aa24e441405413f669
       url: "https://github.com/dz0ny/meshcore_client.git"
     source: git
     version: "0.1.0"
@@ -1208,22 +1200,6 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "2.4.1"
-  shelf:
-    dependency: "direct main"
-    description:
-      name: shelf
-      sha256: e7dd780a7ffb623c57850b33f43309312fc863fb6aa3d276a754bb299839ef12
-      url: "https://pub.dev"
-    source: hosted
-    version: "1.4.2"
-  shelf_router:
-    dependency: "direct main"
-    description:
-      name: shelf_router
-      sha256: f5e5d492440a7fb165fe1e2e1a623f31f734d3370900070b2b1e0d0428d59864
-      url: "https://pub.dev"
-    source: hosted
-    version: "1.1.4"
   simple_sparse_list:
     dependency: transitive
     description:

pubspec.yaml

@@ -16,7 +16,7 @@ publish_to: 'none' # Remove this line if you wish to publish to pub.dev
 # https://developer.apple.com/library/archive/documentation/General/Reference/InfoPlistKeyReference/Articles/CoreFoundationKeys.html
 # In Windows, build-name is used as the major, minor, and patch parts
 # of the product and file versions while build-number is used as the build suffix.
-version: 2026.0311.1+26
+version: 2026.0315.1+31
 
 environment:
   sdk: ^3.9.2
@@ -44,7 +44,7 @@ dependencies:
   meshcore_client:
     git:
       url: https://github.com/dz0ny/meshcore_client.git
-      ref: main
+      ref: "f600789fac7f743b1c7db8aa24e441405413f669"
 
   # Codec2 ultra-low-bitrate speech codec (FFI plugin)
   codec2_flutter:
@@ -118,10 +118,6 @@ dependencies:
   # XML parsing for GPX import/export
   xml: ^6.5.0
 
-  # SSE web server for multi-user support
-  shelf: ^1.4.0
-  shelf_router: ^1.1.0
-
   # Network Service Discovery (Bonjour/mDNS)
   nsd: ^4.0.3
 

test/providers/app_provider_channel_info_test.dart

@@ -0,0 +1,148 @@
+import 'dart:typed_data';
+
+import 'package:flutter_test/flutter_test.dart';
+import 'package:meshcore_sar_app/models/message.dart';
+import 'package:meshcore_sar_app/providers/app_provider.dart';
+
+Uint8List _ownPublicKey() =>
+    Uint8List.fromList([1, 2, 3, 4, 5, 6, ...List<int>.filled(26, 0)]);
+
+void main() {
+  group('AppProvider channel info handling', () {
+    test('treats zeroed unnamed non-public channel as deleted', () {
+      expect(AppProvider.isDeletedChannelInfo(2, '', Uint8List(16)), isTrue);
+    });
+
+    test('keeps unnamed non-public channel when secret is configured', () {
+      final secret = Uint8List.fromList([1, ...List<int>.filled(15, 0)]);
+
+      expect(AppProvider.isDeletedChannelInfo(2, '', secret), isFalse);
+      expect(AppProvider.channelContactName(2, ''), 'Channel 2');
+    });
+  });
+
+  group('AppProvider self replay handling', () {
+    test('prefers self name over meshcore device name', () {
+      expect(
+        AppProvider.preferredSelfDisplayName(
+          deviceName: 'MeshCore-dz0ny (SI)',
+          selfName: 'dz0ny (SI)',
+        ),
+        'dz0ny (SI)',
+      );
+    });
+
+    test('ignores direct self replay without hops', () {
+      final message = Message(
+        id: 'dm-self',
+        messageType: MessageType.contact,
+        senderPublicKeyPrefix: Uint8List.fromList([1, 2, 3, 4, 5, 6]),
+        pathLen: 0,
+        textType: MessageTextType.plain,
+        senderTimestamp: 1700000000,
+        text: 'hello',
+        receivedAt: DateTime.now(),
+      );
+
+      expect(
+        AppProvider.shouldIgnoreSelfReplay(
+          message: message,
+          ownPublicKey: _ownPublicKey(),
+          ownName: 'dz0ny (SI)',
+        ),
+        isTrue,
+      );
+    });
+
+    test('ignores room self replay without hops', () {
+      final message = Message(
+        id: 'room-self',
+        messageType: MessageType.contact,
+        senderPublicKeyPrefix: Uint8List.fromList([1, 2, 3, 4, 5, 6]),
+        recipientPublicKey: Uint8List.fromList([9, 9, 9, 9, 9, 9]),
+        pathLen: 0,
+        textType: MessageTextType.plain,
+        senderTimestamp: 1700000000,
+        text: 'hello room',
+        receivedAt: DateTime.now(),
+      );
+
+      expect(
+        AppProvider.shouldIgnoreSelfReplay(
+          message: message,
+          ownPublicKey: _ownPublicKey(),
+          ownName: 'dz0ny (SI)',
+        ),
+        isTrue,
+      );
+    });
+
+    test('keeps direct self replay when it traversed hops', () {
+      final message = Message(
+        id: 'dm-self-routed',
+        messageType: MessageType.contact,
+        senderPublicKeyPrefix: Uint8List.fromList([1, 2, 3, 4, 5, 6]),
+        pathLen: 1,
+        textType: MessageTextType.plain,
+        senderTimestamp: 1700000000,
+        text: 'hello',
+        receivedAt: DateTime.now(),
+      );
+
+      expect(
+        AppProvider.shouldIgnoreSelfReplay(
+          message: message,
+          ownPublicKey: _ownPublicKey(),
+          ownName: 'dz0ny (SI)',
+        ),
+        isFalse,
+      );
+    });
+
+    test('ignores channel self replay by self name without hops', () {
+      final message = Message(
+        id: 'channel-self',
+        messageType: MessageType.channel,
+        senderName: 'dz0ny (SI)',
+        channelIdx: 0,
+        pathLen: 0,
+        textType: MessageTextType.plain,
+        senderTimestamp: 1700000000,
+        text: 'hello public',
+        receivedAt: DateTime.now(),
+      );
+
+      expect(
+        AppProvider.shouldIgnoreSelfReplay(
+          message: message,
+          ownPublicKey: _ownPublicKey(),
+          ownName: 'dz0ny (SI)',
+        ),
+        isTrue,
+      );
+    });
+
+    test('keeps channel self replay when it traversed hops', () {
+      final message = Message(
+        id: 'channel-self-routed',
+        messageType: MessageType.channel,
+        senderName: 'dz0ny (SI)',
+        channelIdx: 0,
+        pathLen: 1,
+        textType: MessageTextType.plain,
+        senderTimestamp: 1700000000,
+        text: 'hello public',
+        receivedAt: DateTime.now(),
+      );
+
+      expect(
+        AppProvider.shouldIgnoreSelfReplay(
+          message: message,
+          ownPublicKey: _ownPublicKey(),
+          ownName: 'dz0ny (SI)',
+        ),
+        isFalse,
+      );
+    });
+  });
+}

test/providers/connection_provider_channel_slot_test.dart

@@ -0,0 +1,86 @@
+import 'dart:typed_data';
+
+import 'package:flutter_test/flutter_test.dart';
+import 'package:meshcore_sar_app/providers/connection_provider.dart';
+
+void main() {
+  group('ConnectionProvider channel slot occupancy', () {
+    test('treats non-zero secret as configured', () {
+      expect(
+        ConnectionProvider.channelHasConfiguredSecret(Uint8List(16)),
+        isFalse,
+      );
+      expect(
+        ConnectionProvider.channelHasConfiguredSecret(
+          Uint8List.fromList([1, ...List<int>.filled(15, 0)]),
+        ),
+        isTrue,
+      );
+    });
+
+    test('treats duplicate hashtag channels as conflicts', () {
+      expect(
+        ConnectionProvider.isDuplicateChannelName(
+          requestedName: '#sar',
+          existingName: '#sar',
+        ),
+        isTrue,
+      );
+    });
+
+    test('allows private channels with the same name to coexist', () {
+      expect(
+        ConnectionProvider.isDuplicateChannelName(
+          requestedName: 'Ops',
+          existingName: 'Ops',
+        ),
+        isFalse,
+      );
+    });
+
+    test('does not treat arbitrary empty channel info as deletion', () {
+      final provider = ConnectionProvider();
+      expect(
+        provider.shouldTreatChannelInfoAsDeleted(3, '', Uint8List(16)),
+        isFalse,
+      );
+    });
+
+    test('finds first missing custom channel slot', () {
+      expect(
+        ConnectionProvider.firstAvailableChannelSlot(
+          occupiedIndices: {1, 2, 4},
+          maxChannels: 6,
+        ),
+        3,
+      );
+    });
+
+    test('returns null when all custom channel slots are occupied', () {
+      expect(
+        ConnectionProvider.firstAvailableChannelSlot(
+          occupiedIndices: {1, 2, 3, 4},
+          maxChannels: 5,
+        ),
+        isNull,
+      );
+    });
+
+    test('private channels with same name do not block slot selection', () {
+      expect(
+        ConnectionProvider.isDuplicateChannelName(
+          requestedName: 'RPT_admins',
+          existingName: 'RPT_admins',
+        ),
+        isFalse,
+      );
+      expect(
+        ConnectionProvider.firstAvailableChannelSlot(
+          occupiedIndices: {1, 2, 3},
+          maxChannels: 6,
+        ),
+        4,
+      );
+    });
+  });
+}

test/providers/contacts_provider_test.dart

@@ -1,8 +1,10 @@
 import 'dart:typed_data';
 
+import 'package:geolocator/geolocator.dart';
 import 'package:flutter_test/flutter_test.dart';
 import 'package:latlong2/latlong.dart';
 import 'package:meshcore_sar_app/models/contact.dart';
+import 'package:meshcore_sar_app/models/contact_group.dart';
 import 'package:meshcore_sar_app/providers/contacts_provider.dart';
 import 'package:meshcore_sar_app/services/cayenne_lpp_parser.dart';
 import 'package:meshcore_sar_app/utils/fast_gps_packet.dart';
@@ -140,6 +142,7 @@ void main() {
         final contactTypes = <ContactType>[
           ContactType.chat,
           ContactType.repeater,
+          ContactType.sensor,
           ContactType.room,
           ContactType.channel,
         ];
@@ -426,6 +429,46 @@ void main() {
         expect(reloaded.advertLocation!.longitude, closeTo(13.9999, 0.0001));
       },
     );
+
+    test('prefers a local name override and preserves it across refreshes', () {
+      provider.setContactNameOverride(publicKeyHex(publicKey), 'Rescue One');
+
+      final renamed = provider.findContactByKey(publicKey)!;
+      expect(renamed.nameOverride, 'Rescue One');
+      expect(renamed.displayName, 'Rescue One');
+
+      provider.addOrUpdateContact(
+        Contact(
+          publicKey: publicKey,
+          type: ContactType.chat,
+          flags: 0,
+          outPathLen: 0,
+          outPath: Uint8List(64),
+          advName: 'Updated Advertised Name',
+          lastAdvert: DateTime.now().millisecondsSinceEpoch ~/ 1000,
+          advLat: (46.0569 * 1e6).toInt(),
+          advLon: (14.5058 * 1e6).toInt(),
+          lastMod: DateTime.now().millisecondsSinceEpoch ~/ 1000,
+        ),
+      );
+
+      final refreshed = provider.findContactByKey(publicKey)!;
+      expect(refreshed.nameOverride, 'Rescue One');
+      expect(refreshed.displayName, 'Rescue One');
+      expect(refreshed.advName, 'Updated Advertised Name');
+    });
+
+    test('persists a local name override across reloads', () async {
+      provider.setContactNameOverride(publicKeyHex(publicKey), 'Rescue One');
+      await Future<void>.delayed(Duration.zero);
+
+      final reloadedProvider = ContactsProvider();
+      await reloadedProvider.initializeEarly();
+
+      final reloaded = reloadedProvider.findContactByKey(publicKey)!;
+      expect(reloaded.nameOverride, 'Rescue One');
+      expect(reloaded.displayName, 'Rescue One');
+    });
   });
 
   group('ContactsProvider route updates', () {
@@ -457,6 +500,24 @@ void main() {
       expect(updated.routeCanonicalText, 'AABB,CCDD');
     });
 
+    test('stores inferred fallback gps when route is set locally', () {
+      final route = ContactRouteCodec.parse('AABB,CCDD');
+      const fallback = LatLng(46.1001, 14.5002);
+
+      provider.setContactRouteLocal(
+        publicKey,
+        signedEncodedPathLen: route.signedEncodedPathLen,
+        paddedPathBytes: route.paddedPathBytes,
+        inferredFallbackLocation: fallback,
+      );
+
+      final updated = provider.findContactByKey(publicKey)!;
+      expect(updated.displayLocation, isNotNull);
+      expect(updated.displayLocation!.latitude, closeTo(46.1001, 0.000001));
+      expect(updated.displayLocation!.longitude, closeTo(14.5002, 0.000001));
+      expect(updated.advertHistory, isNotEmpty);
+    });
+
     test('resetContactRouteLocal clears route state', () {
       final route = ContactRouteCodec.parse('AA,BB,CC');
       provider.setContactRouteLocal(
@@ -471,6 +532,153 @@ void main() {
       expect(updated.routeHasPath, isFalse);
       expect(updated.routeSummary, 'Flood/Unknown');
     });
+
+    test('retains existing route when contact refresh omits path', () {
+      final retainedRoute = ContactRouteCodec.parse('AABB,CCDD');
+      provider.setContactRouteLocal(
+        publicKey,
+        signedEncodedPathLen: retainedRoute.signedEncodedPathLen,
+        paddedPathBytes: retainedRoute.paddedPathBytes,
+      );
+
+      provider.addOrUpdateContact(
+        createContact(
+          key: publicKey,
+          type: ContactType.chat,
+          name: 'Routey',
+        ).copyWith(outPathLen: -1, outPath: Uint8List(0)),
+      );
+
+      final updated = provider.findContactByKey(publicKey)!;
+      expect(updated.routeHasPath, isTrue);
+      expect(updated.routeCanonicalText, 'AABB,CCDD');
+    });
+
+    test('applies retained pending advert route when contact is resolved', () {
+      final pendingKey = createPublicKey(96);
+      final retainedRoute = ContactRouteCodec.parse('1122,3344');
+
+      provider.retainReceivedRoute(
+        pendingKey,
+        signedEncodedPathLen: retainedRoute.signedEncodedPathLen,
+        paddedPathBytes: retainedRoute.paddedPathBytes,
+      );
+      provider.addPendingAdvert(pendingKey);
+
+      provider.addOrUpdateContact(
+        createContact(
+          key: pendingKey,
+          type: ContactType.chat,
+          name: 'Pending Routey',
+        ).copyWith(outPathLen: -1, outPath: Uint8List(0)),
+      );
+
+      final updated = provider.findContactByKey(pendingKey)!;
+      expect(updated.routeHasPath, isTrue);
+      expect(updated.routeCanonicalText, '1122,3344');
+      expect(
+        provider.pendingAdverts.where(
+          (advert) => advert.publicKeyHex == updated.publicKeyHex,
+        ),
+        isEmpty,
+      );
+    });
+
+    test('infers a fallback location 100m from last-hop repeater', () {
+      final repeaterKey = Uint8List.fromList([
+        0xCC,
+        0xDD,
+        0x10,
+        0x11,
+        0x12,
+        0x13,
+        ...List<int>.generate(26, (index) => index + 20),
+      ]);
+      provider.addOrUpdateContact(
+        createContact(
+          key: repeaterKey,
+          type: ContactType.repeater,
+          name: 'Relay Alpha',
+        ),
+      );
+
+      final targetKey = createPublicKey(120);
+      final route = ContactRouteCodec.parse('AABB,CCDD');
+      provider.addOrUpdateContact(
+        Contact(
+          publicKey: targetKey,
+          type: ContactType.chat,
+          flags: 0,
+          outPathLen: route.signedEncodedPathLen,
+          outPath: route.paddedPathBytes,
+          advName: 'No GPS',
+          lastAdvert: DateTime.now().millisecondsSinceEpoch ~/ 1000,
+          advLat: 0,
+          advLon: 0,
+          lastMod: DateTime.now().millisecondsSinceEpoch ~/ 1000,
+        ),
+      );
+
+      final updated = provider.findContactByKey(targetKey)!;
+      final inferred = updated.displayLocation;
+      final repeater = provider.findContactByKey(repeaterKey)!;
+      final repeaterLocation = repeater.displayLocation;
+
+      expect(inferred, isNotNull);
+      expect(repeaterLocation, isNotNull);
+
+      final distanceMeters = Geolocator.distanceBetween(
+        repeaterLocation!.latitude,
+        repeaterLocation.longitude,
+        inferred!.latitude,
+        inferred.longitude,
+      );
+      expect(distanceMeters, closeTo(100.0, 8.0));
+    });
+
+    test(
+      'does not infer a fallback location when the contact advertises one',
+      () {
+        final repeaterKey = Uint8List.fromList([
+          0xCC,
+          0xDD,
+          0x10,
+          0x11,
+          0x12,
+          0x13,
+          ...List<int>.generate(26, (index) => index + 20),
+        ]);
+        provider.addOrUpdateContact(
+          createContact(
+            key: repeaterKey,
+            type: ContactType.repeater,
+            name: 'Relay Alpha',
+          ),
+        );
+
+        final targetKey = createPublicKey(121);
+        final route = ContactRouteCodec.parse('AABB,CCDD');
+        provider.addOrUpdateContact(
+          Contact(
+            publicKey: targetKey,
+            type: ContactType.chat,
+            flags: 0,
+            outPathLen: route.signedEncodedPathLen,
+            outPath: route.paddedPathBytes,
+            advName: 'Has Advert',
+            lastAdvert: DateTime.now().millisecondsSinceEpoch ~/ 1000,
+            advLat: (45.1234 * 1e6).toInt(),
+            advLon: (13.8765 * 1e6).toInt(),
+            lastMod: DateTime.now().millisecondsSinceEpoch ~/ 1000,
+          ),
+        );
+
+        final updated = provider.findContactByKey(targetKey)!;
+        expect(updated.displayLocation, isNotNull);
+        expect(updated.displayLocation!.latitude, closeTo(45.1234, 0.000001));
+        expect(updated.displayLocation!.longitude, closeTo(13.8765, 0.000001));
+      },
+    );
   });
 
   group('ContactsProvider.updateFastGps', () {
@@ -533,4 +741,79 @@ void main() {
       expect(after.advLon, equals(before.advLon));
     });
   });
+
+  group('ContactsProvider saved contact groups', () {
+    late ContactsProvider provider;
+
+    setUp(() {
+      SharedPreferences.setMockInitialValues({});
+      provider = ContactsProvider();
+    });
+
+    test('adds and removes saved groups by filter', () async {
+      expect(provider.savedContactGroups, isEmpty);
+
+      await provider.addSavedGroupForFilter('teamMembers', 'alpha');
+
+      expect(provider.savedContactGroups, hasLength(1));
+      expect(provider.hasSavedGroupForFilter('teamMembers', 'alpha'), isTrue);
+      expect(provider.hasSavedGroupForFilter('teamMembers', 'ALPHA'), isTrue);
+
+      await provider.removeSavedGroupForFilter('teamMembers', 'ALPHA');
+
+      expect(provider.savedContactGroups, isEmpty);
+      expect(provider.hasSavedGroupForFilter('teamMembers', 'alpha'), isFalse);
+    });
+
+    test('loads persisted saved groups during initialization', () async {
+      await provider.addSavedGroupForFilter('rooms', 'ops');
+
+      final restored = ContactsProvider();
+      await restored.initializeEarly();
+
+      expect(restored.savedGroupsForSection('rooms'), hasLength(1));
+      expect(restored.savedGroupsForSection('rooms').first.query, 'ops');
+      expect(restored.savedGroupsForSection('rooms').first.label, 'ops');
+    });
+
+    test('replaces persisted auto groups for a section', () async {
+      await provider.replaceAutoGroupsForSection('repeaters', [
+        SavedContactGroup(
+          id: '${ContactsProvider.autoGroupIdPrefix}repeaters_al',
+          sectionKey: 'repeaters',
+          label: 'AL-',
+          query: 'AL-',
+          createdAt: DateTime(2026, 3, 10, 12),
+          matchPrefixes: const ['AL-'],
+          isAutoGroup: true,
+        ),
+        SavedContactGroup(
+          id: '${ContactsProvider.autoGroupIdPrefix}repeaters_others',
+          sectionKey: 'repeaters',
+          label: 'Others',
+          query: 'Others',
+          createdAt: DateTime(2026, 3, 10, 12),
+          matchPrefixes: const ['CR-', 'DE-'],
+          isAutoGroup: true,
+        ),
+      ]);
+
+      final restored = ContactsProvider();
+      await restored.initializeEarly();
+
+      expect(restored.savedGroupsForSection('repeaters'), hasLength(2));
+      expect(
+        restored.savedGroupsForSection('repeaters').first.matchPrefixes,
+        isNotEmpty,
+      );
+      expect(
+        restored.savedGroupsForSection('repeaters').first.isAutoGroup,
+        isTrue,
+      );
+    });
+  });
+}
+
+String publicKeyHex(Uint8List publicKey) {
+  return publicKey.map((b) => b.toRadixString(16).padLeft(2, '0')).join('');
 }

test/providers/messages_provider_retransmission_test.dart

@@ -4,6 +4,7 @@ import 'package:fake_async/fake_async.dart';
 import 'package:flutter_test/flutter_test.dart';
 import 'package:meshcore_sar_app/models/contact.dart';
 import 'package:meshcore_sar_app/models/message.dart';
+import 'package:meshcore_sar_app/models/message_reception_details.dart';
 import 'package:meshcore_sar_app/models/path_selection.dart';
 import 'package:meshcore_sar_app/providers/helpers/message_retry_manager.dart';
 import 'package:meshcore_sar_app/providers/messages_provider.dart';
@@ -39,6 +40,46 @@ Message _buildDirectMessage(String id) {
   );
 }
 
+Message _buildSentChannelMessage({
+  required String id,
+  required int senderTimestamp,
+  String text = 'broadcast',
+  int channelIdx = 0,
+}) {
+  return Message(
+    id: id,
+    messageType: MessageType.channel,
+    senderPublicKeyPrefix: Uint8List.fromList([0, 1, 2, 3, 4, 5]),
+    channelIdx: channelIdx,
+    pathLen: 0,
+    textType: MessageTextType.plain,
+    senderTimestamp: senderTimestamp,
+    text: text,
+    receivedAt: DateTime.now(),
+    deliveryStatus: MessageDeliveryStatus.sending,
+  );
+}
+
+Message _buildReceivedChannelReplay({
+  required String id,
+  required int senderTimestamp,
+  String text = 'broadcast',
+  int channelIdx = 0,
+  String senderName = 'Radio Alpha',
+}) {
+  return Message(
+    id: id,
+    messageType: MessageType.channel,
+    channelIdx: channelIdx,
+    pathLen: 1,
+    textType: MessageTextType.plain,
+    senderTimestamp: senderTimestamp,
+    text: text,
+    senderName: senderName,
+    receivedAt: DateTime.now(),
+  );
+}
+
 void main() {
   TestWidgetsFlutterBinding.ensureInitialized();
 
@@ -123,19 +164,9 @@ void main() {
 
     test('channel messages are marked sent immediately', () {
       final provider = MessagesProvider();
+      provider.resolveContactNameCallback = (_) => 'dz0ny (SI)';
       provider.addSentMessage(
-        Message(
-          id: 'c1',
-          messageType: MessageType.channel,
-          senderPublicKeyPrefix: Uint8List.fromList([0, 1, 2, 3, 4, 5]),
-          channelIdx: 0,
-          pathLen: 0,
-          textType: MessageTextType.plain,
-          senderTimestamp: 1700000000,
-          text: 'broadcast',
-          receivedAt: DateTime.now(),
-          deliveryStatus: MessageDeliveryStatus.sending,
-        ),
+        _buildSentChannelMessage(id: 'c1', senderTimestamp: 1700000000),
       );
 
       provider.markMessageSent('c1', 0, 0);
@@ -146,6 +177,259 @@ void main() {
       );
     });
 
+    test('channel warning appears when no echo arrives in time', () {
+      fakeAsync((async) {
+        final provider = MessagesProvider();
+        provider.addSentMessage(
+          _buildSentChannelMessage(id: 'c-warn', senderTimestamp: 1700000000),
+        );
+
+        provider.markMessageSent('c-warn', 0, 0);
+        expect(provider.hasChannelSendWarning('c-warn'), isFalse);
+
+        async.elapse(const Duration(seconds: 12));
+        async.flushMicrotasks();
+
+        expect(provider.hasChannelSendWarning('c-warn'), isTrue);
+      });
+    });
+
+    test('channel warning clears when echo arrives before timeout', () {
+      fakeAsync((async) {
+        final provider = MessagesProvider();
+        provider.addSentMessage(
+          _buildSentChannelMessage(
+            id: 'c-warn-echo',
+            senderTimestamp: 1700000000,
+          ),
+        );
+
+        provider.markMessageSent('c-warn-echo', 0, 0);
+        async.elapse(const Duration(seconds: 6));
+        provider.handleMessageEcho('c-warn-echo', 1, 4, -90);
+        async.elapse(const Duration(seconds: 6));
+        async.flushMicrotasks();
+
+        expect(provider.hasChannelSendWarning('c-warn-echo'), isFalse);
+      });
+    });
+
+    test('channel warning clears when replay is deduped into sent bubble', () {
+      fakeAsync((async) {
+        final provider = MessagesProvider();
+        provider.resolveContactNameCallback = (_) => 'dz0ny (SI)';
+        provider.addSentMessage(
+          _buildSentChannelMessage(
+            id: 'c-warn-replay',
+            senderTimestamp: 1700000100,
+          ),
+        );
+
+        provider.markMessageSent('c-warn-replay', 0, 0);
+        async.elapse(const Duration(seconds: 12));
+        async.flushMicrotasks();
+        expect(provider.hasChannelSendWarning('c-warn-replay'), isTrue);
+
+        provider.addMessage(
+          _buildReceivedChannelReplay(
+            id: 'c-warn-replay-incoming',
+            senderTimestamp: 1700000101,
+            senderName: 'dz0ny (SI)',
+          ),
+        );
+
+        expect(provider.hasChannelSendWarning('c-warn-replay'), isFalse);
+        expect(provider.messages, hasLength(1));
+      });
+    });
+
+    test('channel replay is deduped for self sender within repeat window', () {
+      final provider = MessagesProvider();
+      provider.resolveContactNameCallback = (_) => 'dz0ny (SI)';
+      provider.addSentMessage(
+        _buildSentChannelMessage(id: 'c-echo', senderTimestamp: 1700000100),
+      );
+      provider.markMessageSent('c-echo', 0, 0);
+
+      provider.addMessage(
+        _buildReceivedChannelReplay(
+          id: 'c-echo-incoming',
+          senderTimestamp: 1700000104,
+          senderName: 'dz0ny (SI)',
+        ),
+      );
+
+      expect(provider.messages, hasLength(1));
+      expect(provider.messages.single.id, equals('c-echo'));
+      expect(provider.messages.single.senderName, equals('dz0ny (SI)'));
+    });
+
+    test(
+      'channel replay is not deduped for different sender with same text',
+      () {
+        final provider = MessagesProvider();
+        provider.resolveContactNameCallback = (_) => 'dz0ny (SI)';
+        provider.addSentMessage(
+          _buildSentChannelMessage(
+            id: 'c-no-echo',
+            senderTimestamp: 1700000200,
+          ),
+        );
+        provider.markMessageSent('c-no-echo', 0, 0);
+
+        provider.addMessage(
+          _buildReceivedChannelReplay(
+            id: 'c-no-echo-incoming',
+            senderTimestamp: 1700000201,
+            senderName: 'Radio Alpha',
+          ),
+        );
+
+        expect(provider.messages, hasLength(2));
+      },
+    );
+
+    test('channel replay is not deduped outside repeat window', () {
+      final provider = MessagesProvider();
+      provider.resolveContactNameCallback = (_) => 'dz0ny (SI)';
+      provider.addSentMessage(
+        _buildSentChannelMessage(id: 'c-late', senderTimestamp: 1700000300),
+      );
+      provider.markMessageSent('c-late', 0, 0);
+
+      provider.addMessage(
+        _buildReceivedChannelReplay(
+          id: 'c-late-incoming',
+          senderTimestamp: 1700000331,
+          senderName: 'dz0ny (SI)',
+        ),
+      );
+
+      expect(provider.messages, hasLength(2));
+    });
+
+    test('channel replay can dedupe using lazily resolved self name', () {
+      final provider = MessagesProvider();
+      provider.addSentMessage(
+        _buildSentChannelMessage(id: 'c-lazy', senderTimestamp: 1700000400),
+      );
+      provider.markMessageSent('c-lazy', 0, 0);
+      provider.resolveContactNameCallback = (_) => 'dz0ny (SI)';
+
+      provider.addMessage(
+        _buildReceivedChannelReplay(
+          id: 'c-lazy-incoming',
+          senderTimestamp: 1700000406,
+          senderName: 'dz0ny (SI)',
+        ),
+      );
+
+      expect(provider.messages, hasLength(1));
+      expect(provider.messages.single.id, equals('c-lazy'));
+    });
+
+    test('channel replay dedupes meshcore-prefixed self sender name', () {
+      final provider = MessagesProvider();
+      provider.resolveContactNameCallback = (_) => 'MeshCore-dz0ny (SI)';
+      provider.addSentMessage(
+        _buildSentChannelMessage(id: 'c-prefix', senderTimestamp: 1700000500),
+      );
+      provider.markMessageSent('c-prefix', 0, 0);
+
+      provider.addMessage(
+        _buildReceivedChannelReplay(
+          id: 'c-prefix-incoming',
+          senderTimestamp: 1700000500,
+          senderName: 'dz0ny (SI)',
+        ),
+      );
+
+      expect(provider.messages, hasLength(1));
+      expect(provider.messages.single.id, equals('c-prefix'));
+    });
+
+    test('duplicate incoming message increments received copy count', () {
+      final provider = MessagesProvider();
+      final sender = Uint8List.fromList([7, 7, 4, 1, 7, 2]);
+
+      provider.addMessage(
+        Message(
+          id: 'copy-1',
+          messageType: MessageType.contact,
+          pathLen: 1,
+          textType: MessageTextType.plain,
+          senderTimestamp: 1700000600,
+          text: 'same payload',
+          receivedAt: DateTime.now(),
+          senderPublicKeyPrefix: sender,
+        ),
+        receptionDetailsSnapshot: MessageReceptionDetails(
+          capturedAt: DateTime.now(),
+        ),
+      );
+      provider.addMessage(
+        Message(
+          id: 'copy-2',
+          messageType: MessageType.contact,
+          pathLen: 1,
+          textType: MessageTextType.plain,
+          senderTimestamp: 1700000601,
+          text: 'same payload',
+          receivedAt: DateTime.now(),
+          senderPublicKeyPrefix: sender,
+        ),
+        receptionDetailsSnapshot: MessageReceptionDetails(
+          capturedAt: DateTime.now(),
+        ),
+      );
+
+      expect(provider.messages, hasLength(1));
+      expect(
+        provider.getMessageReceptionDetails('copy-1')?.receivedCopies,
+        equals(2),
+      );
+    });
+
+    test('display list collapses stored duplicates and sums copy counts', () {
+      final provider = MessagesProvider();
+      final sender = Uint8List.fromList([5, 4, 3, 2, 1, 0]);
+
+      provider.addMessages([
+        Message(
+          id: 'dup-a',
+          messageType: MessageType.channel,
+          channelIdx: 0,
+          pathLen: 1,
+          textType: MessageTextType.plain,
+          senderTimestamp: 1700000705,
+          text: 'same payload',
+          senderName: 'Klemen',
+          receivedAt: DateTime.now(),
+          senderPublicKeyPrefix: sender,
+        ),
+        Message(
+          id: 'dup-b',
+          messageType: MessageType.channel,
+          channelIdx: 0,
+          pathLen: 2,
+          textType: MessageTextType.plain,
+          senderTimestamp: 1700000700,
+          text: 'same payload',
+          senderName: 'Klemen',
+          receivedAt: DateTime.now(),
+          senderPublicKeyPrefix: sender,
+        ),
+      ]);
+
+      final display = provider.buildDisplayMessages(
+        provider.getRecentMessages(),
+      );
+
+      expect(display, hasLength(1));
+      expect(display.single.message.id, equals('dup-a'));
+      expect(display.single.occurrenceCount, equals(2));
+    });
+
     test('missing ACK schedules a delayed retransmission', () {
       fakeAsync((async) {
         final provider = MessagesProvider();

test/providers/messages_provider_voice_test.dart

@@ -131,6 +131,108 @@ void main() {
       expect(snapshot.location.longitude, closeTo(14.5058, 0.000001));
     });
 
+    test('dedupes repeated incoming contact messages with same text', () {
+      final provider = MessagesProvider();
+      final sender = Uint8List.fromList([0, 1, 2, 3, 4, 5]);
+
+      provider.addMessage(
+        Message(
+          id: 'dup-1',
+          messageType: MessageType.contact,
+          pathLen: 1,
+          textType: MessageTextType.plain,
+          senderTimestamp: 1700001000,
+          text: 'same payload',
+          receivedAt: DateTime.now(),
+          senderPublicKeyPrefix: sender,
+        ),
+      );
+      provider.addMessage(
+        Message(
+          id: 'dup-2',
+          messageType: MessageType.contact,
+          pathLen: 1,
+          textType: MessageTextType.plain,
+          senderTimestamp: 1700001999,
+          text: 'same payload',
+          receivedAt: DateTime.now(),
+          senderPublicKeyPrefix: sender,
+        ),
+      );
+
+      expect(provider.messages, hasLength(1));
+      expect(provider.messages.single.id, equals('dup-1'));
+    });
+
+    test('keeps separate incoming messages when text differs', () {
+      final provider = MessagesProvider();
+      final sender = Uint8List.fromList([0, 1, 2, 3, 4, 5]);
+
+      provider.addMessage(
+        Message(
+          id: 'unique-1',
+          messageType: MessageType.contact,
+          pathLen: 1,
+          textType: MessageTextType.plain,
+          senderTimestamp: 1700002000,
+          text: 'same payload',
+          receivedAt: DateTime.now(),
+          senderPublicKeyPrefix: sender,
+        ),
+      );
+      provider.addMessage(
+        Message(
+          id: 'unique-2',
+          messageType: MessageType.contact,
+          pathLen: 1,
+          textType: MessageTextType.plain,
+          senderTimestamp: 1700002999,
+          text: 'different payload',
+          receivedAt: DateTime.now(),
+          senderPublicKeyPrefix: sender,
+        ),
+      );
+
+      expect(provider.messages, hasLength(2));
+    });
+
+    test('removed SAR markers stay hidden after provider restore', () async {
+      final provider = MessagesProvider();
+      final message = Message(
+        id: 'sar-hidden',
+        messageType: MessageType.channel,
+        channelIdx: 0,
+        pathLen: 0,
+        textType: MessageTextType.plain,
+        senderTimestamp: 1700000003,
+        text: 'S:🧑:0:46.0569,14.5058:Hidden marker',
+        receivedAt: DateTime.now(),
+        senderPublicKeyPrefix: Uint8List.fromList([0, 1, 2, 3, 4, 5]),
+      );
+
+      provider.addMessage(message);
+      expect(
+        provider.sarMarkers.map((marker) => marker.id),
+        contains(message.id),
+      );
+
+      await provider.removeSarMarker(message.id);
+      expect(provider.sarMarkers, isEmpty);
+
+      final restoredProvider = MessagesProvider();
+      await restoredProvider.initialize();
+
+      expect(
+        restoredProvider.messages.map((stored) => stored.id),
+        contains(message.id),
+      );
+      expect(
+        restoredProvider.sarMarkers.map((marker) => marker.id),
+        isNot(contains(message.id)),
+      );
+      expect(restoredProvider.removedSarMarkerIds, contains(message.id));
+    });
+
     test('tracks and persists media transfer counts and downloaders', () async {
       final provider = MessagesProvider();
       final voiceEnvelope = VoiceEnvelope(

test/providers/sensors_provider_test.dart

@@ -0,0 +1,273 @@
+import 'dart:typed_data';
+
+import 'package:flutter_test/flutter_test.dart';
+import 'package:meshcore_sar_app/models/contact.dart';
+import 'package:meshcore_sar_app/models/device_info.dart';
+import 'package:meshcore_sar_app/providers/connection_provider.dart';
+import 'package:meshcore_sar_app/providers/contacts_provider.dart';
+import 'package:meshcore_sar_app/providers/sensors_provider.dart';
+import 'package:shared_preferences/shared_preferences.dart';
+
+class _FakeContactsProvider extends ContactsProvider {
+  _FakeContactsProvider(this._contacts);
+
+  final List<Contact> _contacts;
+
+  @override
+  List<Contact> get contacts => _contacts;
+}
+
+class _FakeConnectionProvider extends ConnectionProvider {
+  _FakeConnectionProvider({required bool isConnected})
+    : _isConnected = isConnected;
+
+  final bool _isConnected;
+
+  int pingCalls = 0;
+
+  @override
+  DeviceInfo get deviceInfo => DeviceInfo(
+    connectionState: _isConnected
+        ? ConnectionState.connected
+        : ConnectionState.disconnected,
+  );
+
+  @override
+  Future<PingResult> smartPing({
+    required Uint8List contactPublicKey,
+    required bool hasPath,
+    Function()? onRetryWithFlooding,
+  }) async {
+    pingCalls += 1;
+    return const PingResult(
+      success: true,
+      usedFlooding: false,
+      timedOut: false,
+    );
+  }
+}
+
+void main() {
+  TestWidgetsFlutterBinding.ensureInitialized();
+
+  Future<void> waitUntilLoaded(SensorsProvider provider) async {
+    for (var i = 0; i < 20 && !provider.isLoaded; i++) {
+      await Future<void>.delayed(Duration.zero);
+    }
+    expect(provider.isLoaded, isTrue);
+  }
+
+  Contact buildSensorContact() {
+    final publicKey = Uint8List(32);
+    publicKey[0] = 0x44;
+
+    return Contact(
+      publicKey: publicKey,
+      type: ContactType.sensor,
+      flags: 0,
+      outPathLen: 0,
+      outPath: Uint8List(64),
+      advName: 'WX Station',
+      lastAdvert: DateTime.now().millisecondsSinceEpoch ~/ 1000,
+      advLat: 0,
+      advLon: 0,
+      lastMod: DateTime.now().millisecondsSinceEpoch ~/ 1000,
+    );
+  }
+
+  Contact buildTelemetrySensorContact() {
+    final publicKey = Uint8List(32);
+    publicKey[0] = 0x55;
+
+    return Contact(
+      publicKey: publicKey,
+      type: ContactType.sensor,
+      flags: 0,
+      outPathLen: 0,
+      outPath: Uint8List(64),
+      advName: 'Weather Station',
+      lastAdvert: DateTime.now().millisecondsSinceEpoch ~/ 1000,
+      advLat: 0,
+      advLon: 0,
+      lastMod: DateTime.now().millisecondsSinceEpoch ~/ 1000,
+      telemetry: ContactTelemetry(
+        temperature: 11.8,
+        humidity: 51,
+        pressure: 921.9,
+        timestamp: DateTime.now(),
+        extraSensorData: const {
+          '__source_channel:temperature': 3,
+          '__source_channel:humidity': 2,
+          '__source_channel:pressure': 2,
+          'illuminance_2': 19150.0,
+          'temperature_2': 1.99,
+          'voltage_2': 5.2,
+          'switch_2': 0,
+          'speed_2': 2.8,
+          'speed_3': 3.7,
+          'uv_2': 1.0,
+        },
+      ),
+    );
+  }
+
+  test('metric label overrides persist across reloads', () async {
+    SharedPreferences.setMockInitialValues({});
+    final contact = buildSensorContact();
+
+    final provider = SensorsProvider();
+    await waitUntilLoaded(provider);
+    await provider.addSensor(contact);
+    await provider.setMetricLabel(
+      contact.publicKeyHex,
+      'extra:illuminance_2',
+      'Solar',
+    );
+
+    expect(
+      provider.labelOverrideFor(contact.publicKeyHex, 'extra:illuminance_2'),
+      'Solar',
+    );
+
+    final reloadedProvider = SensorsProvider();
+    await waitUntilLoaded(reloadedProvider);
+
+    expect(
+      reloadedProvider.labelOverrideFor(
+        contact.publicKeyHex,
+        'extra:illuminance_2',
+      ),
+      'Solar',
+    );
+  });
+
+  test('metric order persists across reloads', () async {
+    SharedPreferences.setMockInitialValues({});
+    final contact = buildSensorContact();
+
+    final provider = SensorsProvider();
+    await waitUntilLoaded(provider);
+    await provider.addSensor(contact);
+    await provider.moveMetric(
+      contact.publicKeyHex,
+      availableFieldKeys: const ['voltage', 'battery', 'temperature'],
+      oldIndex: 2,
+      newIndex: 0,
+    );
+
+    expect(
+      provider.metricOrderFor(contact.publicKeyHex, const [
+        'voltage',
+        'battery',
+        'temperature',
+      ]),
+      const ['temperature', 'voltage', 'battery'],
+    );
+
+    final reloadedProvider = SensorsProvider();
+    await waitUntilLoaded(reloadedProvider);
+
+    expect(
+      reloadedProvider.metricOrderFor(contact.publicKeyHex, const [
+        'voltage',
+        'battery',
+        'temperature',
+      ]),
+      const ['temperature', 'voltage', 'battery'],
+    );
+  });
+
+  test('auto refresh minutes persist across reloads', () async {
+    SharedPreferences.setMockInitialValues({});
+    final contact = buildSensorContact();
+
+    final provider = SensorsProvider();
+    await waitUntilLoaded(provider);
+    await provider.addSensor(contact);
+    await provider.setAutoRefreshMinutes(contact.publicKeyHex, 1440);
+
+    expect(provider.autoRefreshMinutesFor(contact.publicKeyHex), 1440);
+
+    final reloadedProvider = SensorsProvider();
+    await waitUntilLoaded(reloadedProvider);
+
+    expect(reloadedProvider.autoRefreshMinutesFor(contact.publicKeyHex), 1440);
+  });
+
+  test(
+    'unsupported auto refresh minutes normalize to nearest option',
+    () async {
+      SharedPreferences.setMockInitialValues({});
+      final contact = buildSensorContact();
+
+      final provider = SensorsProvider();
+      await waitUntilLoaded(provider);
+      await provider.addSensor(contact);
+      await provider.setAutoRefreshMinutes(contact.publicKeyHex, 1);
+
+      expect(provider.autoRefreshMinutesFor(contact.publicKeyHex), 5);
+    },
+  );
+
+  test('refreshDueSensors respects per-contact interval', () async {
+    SharedPreferences.setMockInitialValues({});
+    final contact = buildSensorContact();
+    final contactsProvider = _FakeContactsProvider(<Contact>[contact]);
+    final connectionProvider = _FakeConnectionProvider(isConnected: true);
+    final start = DateTime(2026, 3, 15, 9, 0);
+
+    final provider = SensorsProvider();
+    await waitUntilLoaded(provider);
+    await provider.addSensor(contact);
+    await provider.setAutoRefreshMinutes(contact.publicKeyHex, 5);
+
+    await provider.refreshDueSensors(
+      now: start,
+      contactsProvider: contactsProvider,
+      connectionProvider: connectionProvider,
+    );
+    expect(connectionProvider.pingCalls, 1);
+
+    await provider.refreshDueSensors(
+      now: start.add(const Duration(minutes: 4)),
+      contactsProvider: contactsProvider,
+      connectionProvider: connectionProvider,
+    );
+    expect(connectionProvider.pingCalls, 1);
+
+    await provider.refreshDueSensors(
+      now: start.add(const Duration(minutes: 5)),
+      contactsProvider: contactsProvider,
+      connectionProvider: connectionProvider,
+    );
+    expect(connectionProvider.pingCalls, 2);
+  });
+
+  test(
+    'addSensor includes available extra telemetry fields by default',
+    () async {
+      SharedPreferences.setMockInitialValues({});
+      final contact = buildTelemetrySensorContact();
+
+      final provider = SensorsProvider();
+      await waitUntilLoaded(provider);
+      await provider.addSensor(contact);
+
+      expect(
+        provider.visibleFieldsFor(contact.publicKeyHex),
+        containsAll(<String>{
+          'temperature',
+          'humidity',
+          'pressure',
+          'extra:illuminance_2',
+          'extra:temperature_2',
+          'extra:voltage_2',
+          'extra:switch_2',
+          'extra:speed_2',
+          'extra:speed_3',
+          'extra:uv_2',
+        }),
+      );
+    },
+  );
+}

test/screens/contacts_tab_test.dart

@@ -0,0 +1,224 @@
+import 'dart:typed_data';
+
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:meshcore_sar_app/l10n/app_localizations.dart';
+import 'package:meshcore_sar_app/models/contact.dart';
+import 'package:meshcore_sar_app/models/contact_group.dart';
+import 'package:meshcore_sar_app/providers/connection_provider.dart';
+import 'package:meshcore_sar_app/providers/contacts_provider.dart';
+import 'package:meshcore_sar_app/providers/map_provider.dart';
+import 'package:meshcore_sar_app/providers/messages_provider.dart';
+import 'package:meshcore_sar_app/screens/contacts_tab.dart';
+import 'package:meshcore_sar_app/utils/contact_grouping.dart';
+import 'package:provider/provider.dart';
+import 'package:shared_preferences/shared_preferences.dart';
+
+void main() {
+  setUp(() {
+    SharedPreferences.setMockInitialValues({});
+  });
+
+  Contact buildChannel({required String name, required int channelIndex}) {
+    final publicKey = Uint8List(32);
+    publicKey[0] = 0xFF;
+    publicKey[1] = channelIndex;
+
+    return Contact(
+      publicKey: publicKey,
+      type: ContactType.channel,
+      flags: 0,
+      outPathLen: -1,
+      outPath: Uint8List(0),
+      advName: name,
+      lastAdvert: DateTime.now().millisecondsSinceEpoch ~/ 1000,
+      advLat: 0,
+      advLon: 0,
+      lastMod: DateTime.now().millisecondsSinceEpoch ~/ 1000,
+    );
+  }
+
+  Contact buildRepeater({required int seed, required String name}) {
+    final publicKey = Uint8List(32);
+    publicKey[0] = seed;
+    publicKey[1] = seed + 1;
+
+    return Contact(
+      publicKey: publicKey,
+      type: ContactType.repeater,
+      flags: 0,
+      outPathLen: -1,
+      outPath: Uint8List(0),
+      advName: name,
+      lastAdvert: DateTime.now().millisecondsSinceEpoch ~/ 1000,
+      advLat: 46056000 + seed,
+      advLon: 14505000 + seed,
+      lastMod: DateTime.now().millisecondsSinceEpoch ~/ 1000,
+    );
+  }
+
+  Contact buildSensor({required int seed, required String name}) {
+    final publicKey = Uint8List(32);
+    publicKey[0] = seed;
+    publicKey[1] = seed + 1;
+
+    return Contact(
+      publicKey: publicKey,
+      type: ContactType.sensor,
+      flags: 0,
+      outPathLen: -1,
+      outPath: Uint8List(0),
+      advName: name,
+      lastAdvert: DateTime.now().millisecondsSinceEpoch ~/ 1000,
+      advLat: 46056000 + seed,
+      advLon: 14505000 + seed,
+      lastMod: DateTime.now().millisecondsSinceEpoch ~/ 1000,
+    );
+  }
+
+  Future<void> pumpContactsTab(
+    WidgetTester tester, {
+    List<Contact> contacts = const [],
+    List<SavedContactGroup> savedGroups = const [],
+  }) async {
+    final contactsProvider = ContactsProvider();
+    for (final contact in contacts) {
+      contactsProvider.addOrUpdateContact(contact);
+    }
+    if (savedGroups.isNotEmpty) {
+      await contactsProvider.replaceAutoGroupsForSection(
+        'repeaters',
+        savedGroups,
+      );
+    }
+
+    await tester.pumpWidget(
+      MultiProvider(
+        providers: [
+          ChangeNotifierProvider.value(value: contactsProvider),
+          ChangeNotifierProvider(create: (_) => ConnectionProvider()),
+          ChangeNotifierProvider(create: (_) => MessagesProvider()),
+          ChangeNotifierProvider(create: (_) => MapProvider()),
+        ],
+        child: MaterialApp(
+          localizationsDelegates: AppLocalizations.localizationsDelegates,
+          supportedLocales: AppLocalizations.supportedLocales,
+          home: const Scaffold(body: ContactsTab()),
+        ),
+      ),
+    );
+
+    await tester.pumpAndSettle();
+  }
+
+  testWidgets('private channel activity card shows delete action in sheet', (
+    tester,
+  ) async {
+    await pumpContactsTab(
+      tester,
+      contacts: [buildChannel(name: 'Ops', channelIndex: 3)],
+    );
+
+    expect(find.text('Ops'), findsOneWidget);
+    await tester.tap(find.text('Ops'));
+    await tester.pumpAndSettle();
+
+    expect(find.text('Delete Channel'), findsOneWidget);
+
+    await tester.tap(find.text('Delete Channel'));
+    await tester.pumpAndSettle();
+
+    expect(find.text('Delete Channel'), findsWidgets);
+    expect(
+      find.text(
+        'Are you sure you want to delete channel "Ops"? This action cannot be undone.',
+      ),
+      findsOneWidget,
+    );
+  });
+
+  testWidgets('repeaters show Others group when multiple groups exist', (
+    tester,
+  ) async {
+    final repeaters = [
+      buildRepeater(seed: 10, name: 'AL-1'),
+      buildRepeater(seed: 11, name: 'AL-2'),
+      buildRepeater(seed: 12, name: 'AL-3'),
+      buildRepeater(seed: 13, name: 'AL-4'),
+      buildRepeater(seed: 20, name: 'BR-1'),
+      buildRepeater(seed: 21, name: 'BR-2'),
+      buildRepeater(seed: 22, name: 'BR-3'),
+      buildRepeater(seed: 23, name: 'BR-4'),
+      buildRepeater(seed: 30, name: 'Lone Relay'),
+    ];
+    final inferredGroups = ContactGrouping.inferGroups(repeaters);
+    final savedGroups = inferredGroups
+        .map(
+          (group) => SavedContactGroup(
+            id: 'repeaters_${group.key}',
+            sectionKey: 'repeaters',
+            label: group.label,
+            query: group.label,
+            createdAt: DateTime(2026, 3, 13, 10),
+            matchPrefixes: group.matchPrefixes,
+            isAutoGroup: true,
+          ),
+        )
+        .toList();
+
+    await pumpContactsTab(
+      tester,
+      contacts: repeaters,
+      savedGroups: savedGroups,
+    );
+
+    expect(find.text('AL-'), findsOneWidget);
+    expect(find.text('BR-'), findsOneWidget);
+    expect(find.text('Others'), findsOneWidget);
+    expect(find.text('Lone Relay'), findsNothing);
+  });
+
+  testWidgets('repeaters stay flat when only one group exists', (tester) async {
+    final repeaters = [
+      buildRepeater(seed: 40, name: 'AL-1'),
+      buildRepeater(seed: 41, name: 'AL-2'),
+      buildRepeater(seed: 42, name: 'AL-3'),
+      buildRepeater(seed: 43, name: 'AL-4'),
+      buildRepeater(seed: 50, name: 'Lone Relay'),
+    ];
+    final inferredGroups = ContactGrouping.inferGroups(repeaters);
+    final savedGroups = inferredGroups
+        .map(
+          (group) => SavedContactGroup(
+            id: 'repeaters_${group.key}',
+            sectionKey: 'repeaters',
+            label: group.label,
+            query: group.label,
+            createdAt: DateTime(2026, 3, 13, 10),
+            matchPrefixes: group.matchPrefixes,
+            isAutoGroup: true,
+          ),
+        )
+        .toList();
+
+    await pumpContactsTab(
+      tester,
+      contacts: repeaters,
+      savedGroups: savedGroups,
+    );
+
+    expect(find.text('AL-'), findsOneWidget);
+    expect(find.text('Others'), findsNothing);
+    expect(find.text('Lone Relay'), findsOneWidget);
+  });
+
+  testWidgets('sensor contacts render in their own section', (tester) async {
+    await pumpContactsTab(
+      tester,
+      contacts: [buildSensor(seed: 60, name: 'WX Station')],
+    );
+
+    expect(find.text('Sensors'), findsOneWidget);
+    expect(find.text('WX Station'), findsOneWidget);
+  });
+}

test/screens/live_traffic_screen_test.dart

@@ -0,0 +1,185 @@
+import 'dart:typed_data';
+
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:meshcore_sar_app/models/ble_packet_log.dart';
+import 'package:meshcore_sar_app/screens/live_traffic_screen.dart';
+
+BlePacketLog _log({
+  required DateTime timestamp,
+  required PacketDirection direction,
+  required List<int> rawData,
+  int? responseCode,
+  double? snrDb,
+  int? rssiDbm,
+}) {
+  return BlePacketLog(
+    timestamp: timestamp,
+    rawData: Uint8List.fromList(rawData),
+    direction: direction,
+    responseCode: responseCode ?? (rawData.isEmpty ? null : rawData.first),
+    logRxDataInfo: snrDb == null && rssiDbm == null
+        ? null
+        : LogRxDataInfo(
+            entropy: 0,
+            isLikelyEncrypted: false,
+            snrDb: snrDb,
+            rssiDbm: rssiDbm,
+          ),
+  );
+}
+
+List<int> _multiHopRaw({
+  required List<int> hops,
+  int payloadType = 0x01,
+  int hashSize = 2,
+}) {
+  final hopCount = hops.length ~/ hashSize;
+  final pathDescriptor = ((hashSize - 1) << 6) | hopCount;
+  return [
+    0x88,
+    0x00,
+    0x00,
+    payloadType << 2,
+    0x00,
+    0x00,
+    0x00,
+    0x00,
+    pathDescriptor,
+    ...hops,
+  ];
+}
+
+void main() {
+  testWidgets('shows empty state before traffic arrives', (tester) async {
+    final logs = <BlePacketLog>[];
+    final refresh = ValueNotifier<int>(0);
+    DateTime now = DateTime(2026, 3, 12, 12, 0, 0);
+
+    await tester.pumpWidget(
+      MaterialApp(
+        home: LiveTrafficScreen(
+          logReader: () => logs,
+          refreshListenable: refresh,
+          now: () => now,
+        ),
+      ),
+    );
+
+    expect(find.text('No packets for this filter'), findsOneWidget);
+    expect(find.text('Quiet'), findsOneWidget);
+  });
+
+  testWidgets('updates summary and stream for incoming live traffic', (
+    tester,
+  ) async {
+    final logs = <BlePacketLog>[];
+    final refresh = ValueNotifier<int>(0);
+    DateTime now = DateTime(2026, 3, 12, 12, 0, 0);
+
+    await tester.pumpWidget(
+      MaterialApp(
+        home: LiveTrafficScreen(
+          logReader: () => logs,
+          rxCountReader: () => 7,
+          refreshListenable: refresh,
+          now: () => now,
+        ),
+      ),
+    );
+
+    logs.addAll([
+      _log(
+        timestamp: now.subtract(const Duration(seconds: 10)),
+        direction: PacketDirection.rx,
+        rawData: _multiHopRaw(hops: [0xC0, 0x10, 0x63, 0x01, 0x68, 0xD9]),
+        responseCode: 0x88,
+        snrDb: 13.5,
+        rssiDbm: -84,
+      ),
+      _log(
+        timestamp: now.subtract(const Duration(seconds: 3)),
+        direction: PacketDirection.tx,
+        rawData: [0x05, 0x01, 0x02],
+        responseCode: 0x88,
+      ),
+      _log(
+        timestamp: now.subtract(const Duration(seconds: 2)),
+        direction: PacketDirection.rx,
+        rawData: [0x05, 0x01, 0x02],
+        responseCode: 0x05,
+      ),
+    ]);
+    refresh.value += 1;
+    await tester.pump();
+
+    expect(find.text('1 pkt/min'), findsOneWidget);
+    expect(find.text('Device total 7'), findsOneWidget);
+    expect(find.text('FLOOD RESPONSE'), findsOneWidget);
+    expect(find.text('MULTI-HOP'), findsOneWidget);
+    expect(find.textContaining('RSSI -84 dBm'), findsOneWidget);
+    expect(find.textContaining('Hash:'), findsOneWidget);
+    expect(
+      find.textContaining('Path: 3 hops [c010,6301,68d9]'),
+      findsOneWidget,
+    );
+    expect(find.textContaining('Path Hashes: 2-byte per hop'), findsOneWidget);
+  });
+
+  testWidgets('clear live view only resets transient screen state', (
+    tester,
+  ) async {
+    final logs = <BlePacketLog>[];
+    final refresh = ValueNotifier<int>(0);
+    DateTime now = DateTime(2026, 3, 12, 12, 0, 0);
+
+    logs.add(
+      _log(
+        timestamp: now.subtract(const Duration(seconds: 4)),
+        direction: PacketDirection.rx,
+        rawData: _multiHopRaw(hops: [0xC0, 0x10, 0x63, 0x01]),
+        responseCode: 0x88,
+      ),
+    );
+
+    await tester.pumpWidget(
+      MaterialApp(
+        home: LiveTrafficScreen(
+          logReader: () => logs,
+          refreshListenable: refresh,
+          now: () => now,
+        ),
+      ),
+    );
+
+    expect(find.text('MULTI-HOP'), findsOneWidget);
+
+    await tester.tap(find.byTooltip('Clear live view'));
+    await tester.pump();
+
+    expect(find.text('No packets for this filter'), findsOneWidget);
+
+    now = now.add(const Duration(seconds: 2));
+    logs.add(
+      _log(
+        timestamp: now,
+        direction: PacketDirection.tx,
+        rawData: [0x03, 0x04],
+        responseCode: 0x88,
+      ),
+    );
+    logs.add(
+      _log(
+        timestamp: now,
+        direction: PacketDirection.rx,
+        rawData: [0x88, 0x00, 0x00],
+        responseCode: 0x88,
+      ),
+    );
+    refresh.value += 1;
+    await tester.pump();
+
+    expect(find.text('No packets for this filter'), findsNothing);
+    expect(find.textContaining('Size: 3 bytes'), findsOneWidget);
+  });
+}

test/screens/messages_tab_test.dart

@@ -0,0 +1,211 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:meshcore_sar_app/l10n/app_localizations.dart';
+import 'package:meshcore_sar_app/models/contact.dart';
+import 'package:meshcore_sar_app/models/message.dart';
+import 'package:meshcore_sar_app/providers/app_provider.dart';
+import 'package:meshcore_sar_app/providers/channels_provider.dart';
+import 'package:meshcore_sar_app/providers/connection_provider.dart';
+import 'package:meshcore_sar_app/providers/contacts_provider.dart';
+import 'package:meshcore_sar_app/providers/drawing_provider.dart';
+import 'package:meshcore_sar_app/providers/image_provider.dart' as ip;
+import 'package:meshcore_sar_app/providers/map_provider.dart';
+import 'package:meshcore_sar_app/providers/messages_provider.dart';
+import 'package:meshcore_sar_app/providers/voice_provider.dart';
+import 'package:meshcore_sar_app/screens/messages_tab.dart';
+import 'package:meshcore_sar_app/services/voice_codec_service.dart';
+import 'package:meshcore_sar_app/services/voice_player_service.dart';
+import 'package:provider/provider.dart';
+import 'package:shared_preferences/shared_preferences.dart';
+import 'dart:typed_data';
+
+void main() {
+  TestWidgetsFlutterBinding.ensureInitialized();
+
+  Contact buildContact({
+    required String name,
+    required ContactType type,
+    int secondByte = 1,
+  }) {
+    final publicKey = Uint8List(32);
+    publicKey[0] = secondByte;
+    publicKey[1] = secondByte;
+
+    return Contact(
+      publicKey: publicKey,
+      type: type,
+      flags: 0,
+      outPathLen: 0,
+      outPath: Uint8List(64),
+      advName: name,
+      lastAdvert: 0,
+      advLat: 0,
+      advLon: 0,
+      lastMod: 0,
+    );
+  }
+
+  setUp(() {
+    SharedPreferences.setMockInitialValues({});
+  });
+
+  testWidgets('marks public channel as read after 5 seconds of viewing', (
+    tester,
+  ) async {
+    final connectionProvider = ConnectionProvider();
+    final contactsProvider = ContactsProvider();
+    final messagesProvider = MessagesProvider();
+    final mapProvider = MapProvider();
+    final drawingProvider = DrawingProvider();
+    final channelsProvider = ChannelsProvider()..initializePublicChannel();
+    final voiceProvider = VoiceProvider(
+      codec: VoiceCodecService(),
+      player: VoicePlayerService(),
+    );
+    final imageProvider = ip.ImageProvider();
+    final appProvider = AppProvider(
+      connectionProvider: connectionProvider,
+      contactsProvider: contactsProvider,
+      messagesProvider: messagesProvider,
+      drawingProvider: drawingProvider,
+      channelsProvider: channelsProvider,
+      voiceProvider: voiceProvider,
+      imageProvider: imageProvider,
+    );
+
+    messagesProvider.addMessage(
+      Message(
+        id: 'public-unread',
+        messageType: MessageType.channel,
+        pathLen: 1,
+        textType: MessageTextType.plain,
+        senderTimestamp: 1700000100,
+        text: 'Unread on public channel',
+        receivedAt: DateTime.now(),
+        channelIdx: 0,
+      ),
+    );
+
+    await tester.pumpWidget(
+      MultiProvider(
+        providers: [
+          ChangeNotifierProvider.value(value: connectionProvider),
+          ChangeNotifierProvider.value(value: contactsProvider),
+          ChangeNotifierProvider.value(value: messagesProvider),
+          ChangeNotifierProvider.value(value: mapProvider),
+          ChangeNotifierProvider.value(value: drawingProvider),
+          ChangeNotifierProvider.value(value: channelsProvider),
+          ChangeNotifierProvider.value(value: voiceProvider),
+          ChangeNotifierProvider.value(value: imageProvider),
+          ChangeNotifierProvider.value(value: appProvider),
+        ],
+        child: MaterialApp(
+          localizationsDelegates: AppLocalizations.localizationsDelegates,
+          supportedLocales: AppLocalizations.supportedLocales,
+          home: const Scaffold(body: MessagesTab(isActive: true)),
+        ),
+      ),
+    );
+
+    await tester.pump();
+
+    expect(messagesProvider.unreadCount, 1);
+
+    await tester.pump(const Duration(seconds: 4));
+    expect(messagesProvider.unreadCount, 1);
+
+    await tester.pump(const Duration(seconds: 1));
+    await tester.pump();
+
+    expect(messagesProvider.unreadCount, 0);
+
+    appProvider.dispose();
+    voiceProvider.dispose();
+    imageProvider.dispose();
+    drawingProvider.dispose();
+    mapProvider.dispose();
+    messagesProvider.dispose();
+    contactsProvider.dispose();
+    connectionProvider.dispose();
+    channelsProvider.dispose();
+  });
+
+  testWidgets('shows mention overlay above composer and inserts selection', (
+    tester,
+  ) async {
+    final connectionProvider = ConnectionProvider();
+    final contactsProvider = ContactsProvider();
+    final messagesProvider = MessagesProvider();
+    final mapProvider = MapProvider();
+    final drawingProvider = DrawingProvider();
+    await messagesProvider.initialize();
+    await drawingProvider.initialize();
+    final channelsProvider = ChannelsProvider()..initializePublicChannel();
+    final voiceProvider = VoiceProvider(
+      codec: VoiceCodecService(),
+      player: VoicePlayerService(),
+    );
+    final imageProvider = ip.ImageProvider();
+    final appProvider = AppProvider(
+      connectionProvider: connectionProvider,
+      contactsProvider: contactsProvider,
+      messagesProvider: messagesProvider,
+      drawingProvider: drawingProvider,
+      channelsProvider: channelsProvider,
+      voiceProvider: voiceProvider,
+      imageProvider: imageProvider,
+    );
+
+    contactsProvider.addContacts([
+      buildContact(name: 'Tim', type: ContactType.chat, secondByte: 2),
+      buildContact(name: 'Slane', type: ContactType.chat, secondByte: 3),
+    ]);
+
+    await tester.pumpWidget(
+      MultiProvider(
+        providers: [
+          ChangeNotifierProvider.value(value: connectionProvider),
+          ChangeNotifierProvider.value(value: contactsProvider),
+          ChangeNotifierProvider.value(value: messagesProvider),
+          ChangeNotifierProvider.value(value: mapProvider),
+          ChangeNotifierProvider.value(value: drawingProvider),
+          ChangeNotifierProvider.value(value: channelsProvider),
+          ChangeNotifierProvider.value(value: voiceProvider),
+          ChangeNotifierProvider.value(value: imageProvider),
+          ChangeNotifierProvider.value(value: appProvider),
+        ],
+        child: MaterialApp(
+          localizationsDelegates: AppLocalizations.localizationsDelegates,
+          supportedLocales: AppLocalizations.supportedLocales,
+          home: const Scaffold(body: MessagesTab(isActive: true)),
+        ),
+      ),
+    );
+
+    await tester.pumpAndSettle();
+    await tester.pump(const Duration(milliseconds: 60));
+
+    await tester.tap(find.byType(TextField).first);
+    await tester.enterText(find.byType(TextField).first, '@t');
+    await tester.pumpAndSettle();
+
+    expect(find.text('Tim'), findsOneWidget);
+    expect(find.text('Slane'), findsNothing);
+
+    await tester.tap(find.text('Tim'));
+    await tester.pumpAndSettle();
+
+    expect(find.text('@[Tim] '), findsOneWidget);
+    expect(find.text('Tim'), findsNothing);
+
+    appProvider.dispose();
+    voiceProvider.dispose();
+    imageProvider.dispose();
+    drawingProvider.dispose();
+    mapProvider.dispose();
+    messagesProvider.dispose();
+    contactsProvider.dispose();
+    connectionProvider.dispose();
+    channelsProvider.dispose();
+  });
+}

test/screens/sensors_tab_test.dart

@@ -0,0 +1,97 @@
+import 'dart:typed_data';
+
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:meshcore_sar_app/l10n/app_localizations.dart';
+import 'package:meshcore_sar_app/models/contact.dart';
+import 'package:meshcore_sar_app/providers/contacts_provider.dart';
+import 'package:meshcore_sar_app/providers/sensors_provider.dart';
+import 'package:meshcore_sar_app/screens/sensors_tab.dart';
+import 'package:provider/provider.dart';
+import 'package:shared_preferences/shared_preferences.dart';
+
+void main() {
+  setUp(() {
+    SharedPreferences.setMockInitialValues({});
+  });
+
+  Future<void> waitUntilLoaded(SensorsProvider provider) async {
+    for (var i = 0; i < 20 && !provider.isLoaded; i++) {
+      await Future<void>.delayed(Duration.zero);
+    }
+    expect(provider.isLoaded, isTrue);
+  }
+
+  Contact buildSensorContact() {
+    final publicKey = Uint8List(32);
+    publicKey[0] = 0x44;
+
+    return Contact(
+      publicKey: publicKey,
+      type: ContactType.sensor,
+      flags: 0,
+      outPathLen: 0,
+      outPath: Uint8List(64),
+      advName: 'WX Station',
+      lastAdvert: DateTime.now().millisecondsSinceEpoch ~/ 1000,
+      advLat: 0,
+      advLon: 0,
+      lastMod: DateTime.now().millisecondsSinceEpoch ~/ 1000,
+      telemetry: ContactTelemetry(
+        batteryPercentage: 84,
+        temperature: 21.5,
+        extraSensorData: const {
+          '__source_channel:battery': 1,
+          '__source_channel:temperature': 1,
+          'illuminance_2': 500.0,
+        },
+        timestamp: DateTime.now().subtract(const Duration(minutes: 1)),
+      ),
+    );
+  }
+
+  testWidgets('customize action opens full customization view', (tester) async {
+    final contact = buildSensorContact();
+    final sensorsProvider = SensorsProvider();
+    final contactsProvider = ContactsProvider();
+
+    await waitUntilLoaded(sensorsProvider);
+    contactsProvider.addOrUpdateContact(contact);
+    await sensorsProvider.addSensor(contact);
+
+    await tester.pumpWidget(
+      MultiProvider(
+        providers: [
+          ChangeNotifierProvider<ContactsProvider>.value(
+            value: contactsProvider,
+          ),
+          ChangeNotifierProvider<SensorsProvider>.value(value: sensorsProvider),
+        ],
+        child: MaterialApp(
+          localizationsDelegates: AppLocalizations.localizationsDelegates,
+          supportedLocales: AppLocalizations.supportedLocales,
+          home: const SensorsTab(),
+        ),
+      ),
+    );
+    await tester.pump();
+
+    await tester.tap(find.byIcon(Icons.more_vert));
+    await tester.pump();
+    await tester.pump(const Duration(milliseconds: 300));
+    await tester.tap(find.text('Customize fields'));
+    await tester.pump();
+    await tester.pump(const Duration(milliseconds: 300));
+
+    expect(find.text('Customize WX Station'), findsOneWidget);
+    expect(find.text('Live preview'), findsOneWidget);
+    expect(find.text('Refresh schedule'), findsOneWidget);
+    expect(
+      find.byKey(
+        const ValueKey('sensor_selector_metric_channel_extra:illuminance_2'),
+      ),
+      findsOneWidget,
+    );
+    expect(find.text('Channel 2'), findsOneWidget);
+  });
+}

test/services/cayenne_lpp_parser_test.dart

@@ -360,6 +360,134 @@ void main() {
       expect(accel['z'], closeTo(2.0, 0.001));
     });
 
+    test('extended MeshCore LPP types decode to structured extra data', () {
+      const lppGenericSensor = 100;
+      const lppCurrent = 117;
+      const lppFrequency = 118;
+      const lppAltitude = 121;
+      const lppConcentration = 125;
+      const lppPower = 128;
+      const lppSpeed = 129;
+      const lppDistance = 130;
+      const lppEnergy = 131;
+      const lppDirection = 132;
+      const lppUnixTime = 133;
+      const lppColour = 135;
+      const lppGust = 137;
+      const lppDewPoint = 138;
+      const lppRain = 139;
+      const lppSwitch = 142;
+
+      final payload = Uint8List.fromList([
+        2, lppGenericSensor, 0x00, 0x00, 0x01, 0x2C, // 300
+        3, lppCurrent, 0x00, 0x0F, // 0.015 A
+        4, lppFrequency, 0x00, 0x00, 0x03, 0xE8, // 1000 Hz
+        5, lppAltitude, 0x01, 0xF4, // 500 m
+        6, lppConcentration, 0x01, 0x9F, // 415 ppm
+        7, lppPower, 0x00, 0xFA, // 250 W
+        8, lppSpeed, 0x04, 0xD2, // 12.34 m/s
+        9, lppDistance, 0x00, 0x00, 0x04, 0xD2, // 1.234 m
+        10, lppEnergy, 0x00, 0x00, 0x04, 0xD2, // 1.234 kWh
+        11, lppDirection, 0x01, 0x0E, // 270 deg
+        12, lppUnixTime, 0x65, 0xF0, 0x00, 0x00, // 1710221312
+        13, lppColour, 0xFF, 0x80, 0x40, // #FF8040
+        15, lppGust, 0x01, 0x72, // 3.70 m/s
+        16, lppDewPoint, 0x00, 0x14, // 2.0 C
+        17, lppRain, 0x00, 0x7B, // 12.3 mm
+        14, lppSwitch, 0x01, // on
+      ]);
+
+      final decoded = CayenneLppParser.parse(payload);
+
+      expect(decoded.extraSensorData, isNotNull);
+      expect(decoded.extraSensorData!['generic_sensor_2'], equals(300.0));
+      expect(decoded.extraSensorData!['current_3'], closeTo(0.015, 0.0001));
+      expect(decoded.extraSensorData!['frequency_4'], equals(1000.0));
+      expect(decoded.extraSensorData!['altitude_5'], equals(500.0));
+      expect(decoded.extraSensorData!['concentration_6'], equals(415.0));
+      expect(decoded.extraSensorData!['power_7'], equals(250.0));
+      expect(decoded.extraSensorData!['speed_8'], closeTo(12.34, 0.001));
+      expect(decoded.extraSensorData!['distance_9'], closeTo(1.234, 0.0001));
+      expect(decoded.extraSensorData!['energy_10'], closeTo(1.234, 0.0001));
+      expect(decoded.extraSensorData!['direction_11'], equals(270.0));
+      expect(decoded.extraSensorData!['unixtime_12'], equals(1710227456));
+      expect(
+        decoded.extraSensorData!['colour_13'],
+        equals({'r': 255, 'g': 128, 'b': 64}),
+      );
+      expect(decoded.extraSensorData!['gust_15'], closeTo(3.7, 0.001));
+      expect(decoded.extraSensorData!['dew_16'], closeTo(2.0, 0.001));
+      expect(decoded.extraSensorData!['rain_17'], closeTo(12.3, 0.001));
+      expect(decoded.extraSensorData!['switch_14'], equals(1));
+    });
+
+    test('new MeshCore custom telemetry types decode without truncation', () {
+      const lppBinaryMoisture = 157;
+      const lppButtonEvent = 171;
+      const lppDimmer = 172;
+      const lppUv = 173;
+      const lppPm25 = 175;
+      const lppConductivity = 180;
+      const lppDuration = 182;
+      const lppSignedSpeed = 191;
+      const lppSignedPower = 192;
+      const lppSignedCurrent = 193;
+
+      final payload = Uint8List.fromList([
+        2, lppBinaryMoisture, 0x01,
+        3, lppButtonEvent, 0x04,
+        4, lppDimmer, 0xFB, // -5
+        5, lppUv, 0x0A, // 1.0
+        6, lppPm25, 0x00, 0x0C, // 12
+        7, lppConductivity, 0x01, 0xF4, // 500
+        8, lppDuration, 0x00, 0x00, 0x13, 0x88, // 5.0 s
+        9, lppSignedSpeed, 0xFF, 0xE1, 0x7B, 0x80, // -2.0 m/s
+        10, lppSignedPower, 0xFF, 0xFF, 0xFC, 0x18, // -10.0 W
+        11, lppSignedCurrent, 0xFF, 0xFF, 0xFC, 0x18, // -1.0 A
+        12, MeshCoreConstants.lppTemperatureSensor, 0x00, 0x76, // 11.8 C
+      ]);
+
+      final decoded = CayenneLppParser.parse(payload);
+
+      expect(decoded.extraSensorData!['binary_moisture_2'], equals(1));
+      expect(decoded.extraSensorData!['button_event_3'], equals(4));
+      expect(decoded.extraSensorData!['dimmer_4'], equals(-5));
+      expect(decoded.extraSensorData!['uv_5'], closeTo(1.0, 0.001));
+      expect(decoded.extraSensorData!['pm25_6'], equals(12.0));
+      expect(decoded.extraSensorData!['conductivity_7'], equals(500.0));
+      expect(decoded.extraSensorData!['duration_8'], closeTo(5.0, 0.001));
+      expect(decoded.extraSensorData!['signed_speed_9'], closeTo(-2.0, 0.001));
+      expect(
+        decoded.extraSensorData!['signed_power_10'],
+        closeTo(-10.0, 0.001),
+      );
+      expect(
+        decoded.extraSensorData!['signed_current_11'],
+        closeTo(-1.0, 0.001),
+      );
+      expect(decoded.temperature, closeTo(11.8, 0.1));
+    });
+
+    test(
+      'percentage battery and non-battery voltage channels are preserved separately',
+      () {
+        const lppPercentage = 120;
+
+        final payload = Uint8List.fromList([
+          1, lppPercentage, 66, // battery %
+          2, MeshCoreConstants.lppVoltageSensor, 0x01, 0x81, // 3.85 V
+          2, MeshCoreConstants.lppTemperatureSensor, 0x00, 0xEB, // 23.5 C
+        ]);
+
+        final decoded = CayenneLppParser.parse(payload);
+
+        expect(decoded.batteryPercentage, equals(66.0));
+        expect(decoded.extraSensorData!['voltage_2'], closeTo(3.85, 0.001));
+        expect(decoded.temperature, closeTo(23.5, 0.1));
+        expect(decoded.extraSensorData!['temperature_2'], closeTo(23.5, 0.1));
+      },
+    );
+
     test('unknown sensor type is skipped gracefully', () {
       final buffer = ByteData(5);
       buffer.setUint8(0, 0);

test/services/contact_route_resolver_test.dart

@@ -0,0 +1,143 @@
+import 'dart:typed_data';
+
+import 'package:flutter_test/flutter_test.dart';
+import 'package:latlong2/latlong.dart';
+import 'package:meshcore_sar_app/models/contact.dart';
+import 'package:meshcore_sar_app/services/contact_route_resolver.dart';
+
+void main() {
+  test('prefers known repeater route when available', () {
+    final recipient = _contact(
+      name: 'Target',
+      type: ContactType.chat,
+      seed: 90,
+      lat: 46.20,
+      lon: 14.70,
+    );
+    final routedRepeater = _contact(
+      name: 'Routed',
+      type: ContactType.repeater,
+      seed: 10,
+      lat: 46.15,
+      lon: 14.60,
+      signedPathLen: ContactRouteCodec.toSignedDescriptor(1),
+      outPath: Uint8List.fromList([0xAA]),
+    );
+
+    final plan = ContactRouteResolver.resolveAutomaticRoute(
+      senderLocation: const LatLng(46.00, 14.50),
+      recipient: recipient,
+      availableContacts: [routedRepeater],
+      hashSize: 1,
+    );
+
+    expect(plan, isNotNull);
+    expect(plan!.tokens, [
+      'AA',
+      routedRepeater.publicKeyHex.substring(0, 2).toUpperCase(),
+    ]);
+  });
+
+  test('falls back to location-only repeaters', () {
+    final recipient = _contact(
+      name: 'Target',
+      type: ContactType.chat,
+      seed: 90,
+      lat: 46.20,
+      lon: 14.70,
+    );
+    final nearRepeater = _contact(
+      name: 'Near',
+      type: ContactType.repeater,
+      seed: 10,
+      lat: 46.08,
+      lon: 14.55,
+    );
+    final farRepeater = _contact(
+      name: 'Far',
+      type: ContactType.repeater,
+      seed: 11,
+      lat: 46.40,
+      lon: 15.10,
+    );
+
+    final plan = ContactRouteResolver.resolveAutomaticRoute(
+      senderLocation: const LatLng(46.00, 14.50),
+      recipient: recipient,
+      availableContacts: [nearRepeater, farRepeater],
+      hashSize: 1,
+    );
+
+    expect(plan, isNotNull);
+    expect(plan!.selectedContacts.first.displayName, 'Near');
+  });
+
+  test('for known routes prefers anchor closest to the chain end', () {
+    final recipient = _contact(
+      name: 'Target',
+      type: ContactType.chat,
+      seed: 90,
+      lat: 46.20,
+      lon: 14.70,
+    );
+    final chainHop = _contact(
+      name: 'Chain Hop',
+      type: ContactType.repeater,
+      seed: 0xAA,
+      lat: 46.01,
+      lon: 14.51,
+    );
+    final nearAnchor = _contact(
+      name: 'Near Anchor',
+      type: ContactType.repeater,
+      seed: 10,
+      lat: 46.03,
+      lon: 14.53,
+      signedPathLen: ContactRouteCodec.toSignedDescriptor(1),
+      outPath: Uint8List.fromList([0xAA]),
+    );
+    final farAnchor = _contact(
+      name: 'Far Anchor',
+      type: ContactType.repeater,
+      seed: 11,
+      lat: 46.18,
+      lon: 14.68,
+      signedPathLen: ContactRouteCodec.toSignedDescriptor(1),
+      outPath: Uint8List.fromList([0xAA]),
+    );
+
+    final plan = ContactRouteResolver.resolveAutomaticRoute(
+      senderLocation: const LatLng(46.00, 14.50),
+      recipient: recipient,
+      availableContacts: [chainHop, nearAnchor, farAnchor],
+      hashSize: 1,
+    );
+
+    expect(plan, isNotNull);
+    expect(plan!.selectedContacts.last.displayName, 'Near Anchor');
+  });
+}
+
+Contact _contact({
+  required String name,
+  required ContactType type,
+  required int seed,
+  required double lat,
+  required double lon,
+  int signedPathLen = -1,
+  Uint8List? outPath,
+}) {
+  final publicKey = Uint8List(32)..fillRange(0, 32, seed);
+  return Contact(
+    publicKey: publicKey,
+    type: type,
+    flags: 0,
+    outPathLen: signedPathLen,
+    outPath: outPath ?? Uint8List(64),
+    advName: name,
+    lastAdvert: DateTime.now().millisecondsSinceEpoch ~/ 1000,
+    advLat: (lat * 1e6).round(),
+    advLon: (lon * 1e6).round(),
+    lastMod: DateTime.now().millisecondsSinceEpoch ~/ 1000,
+  );
+}

test/services/live_traffic_summary_test.dart

@@ -0,0 +1,168 @@
+import 'dart:typed_data';
+
+import 'package:flutter_test/flutter_test.dart';
+import 'package:meshcore_sar_app/models/ble_packet_log.dart';
+import 'package:meshcore_sar_app/services/live_traffic_summary.dart';
+
+BlePacketLog _log({
+  required DateTime timestamp,
+  required PacketDirection direction,
+  required List<int> rawData,
+  int? responseCode,
+  double? snrDb,
+  int? rssiDbm,
+}) {
+  return BlePacketLog(
+    timestamp: timestamp,
+    rawData: Uint8List.fromList(rawData),
+    direction: direction,
+    responseCode: responseCode ?? (rawData.isEmpty ? null : rawData.first),
+    logRxDataInfo: snrDb == null && rssiDbm == null
+        ? null
+        : LogRxDataInfo(
+            entropy: 0,
+            isLikelyEncrypted: false,
+            snrDb: snrDb,
+            rssiDbm: rssiDbm,
+          ),
+  );
+}
+
+List<int> _multiHopRaw({
+  required List<int> hops,
+  int payloadType = 0x01,
+  int hashSize = 2,
+}) {
+  final hopCount = hops.length ~/ hashSize;
+  final pathDescriptor = ((hashSize - 1) << 6) | hopCount;
+  return [
+    0x88,
+    0x00,
+    0x00,
+    payloadType << 2,
+    0x00,
+    0x00,
+    0x00,
+    0x00,
+    pathDescriptor,
+    ...hops,
+  ];
+}
+
+void main() {
+  group('LiveTrafficSummary', () {
+    test('uses only the rolling 60-second window', () {
+      final now = DateTime(2026, 3, 12, 12, 0, 0);
+      final snapshot = LiveTrafficSummary.fromLogs([
+        _log(
+          timestamp: now.subtract(const Duration(seconds: 61)),
+          direction: PacketDirection.rx,
+          rawData: [0x88, 0x00, 0x00],
+          responseCode: 0x88,
+        ),
+        _log(
+          timestamp: now.subtract(const Duration(seconds: 20)),
+          direction: PacketDirection.rx,
+          rawData: [0x88, 0x00, 0x00],
+          responseCode: 0x88,
+        ),
+        _log(
+          timestamp: now.subtract(const Duration(seconds: 10)),
+          direction: PacketDirection.tx,
+          rawData: [0x01, 0x02],
+          responseCode: 0x88,
+        ),
+        _log(
+          timestamp: now.subtract(const Duration(seconds: 5)),
+          direction: PacketDirection.rx,
+          rawData: [0x01, 0x02],
+          responseCode: 0x01,
+        ),
+      ], now: now);
+
+      expect(snapshot.totalCount, 1);
+      expect(snapshot.rxCount, 1);
+      expect(snapshot.txCount, 0);
+      expect(snapshot.packetsPerMinute, 1);
+    });
+
+    test('aggregates RSSI, SNR, and multi-hop route metrics', () {
+      final now = DateTime(2026, 3, 12, 12, 0, 0);
+      final snapshot = LiveTrafficSummary.fromLogs([
+        _log(
+          timestamp: now.subtract(const Duration(seconds: 30)),
+          direction: PacketDirection.rx,
+          rawData: _multiHopRaw(hops: [0xC0, 0x10, 0x63, 0x01, 0x68, 0xD9]),
+          responseCode: 0x88,
+          snrDb: 12.0,
+          rssiDbm: -84,
+        ),
+        _log(
+          timestamp: now.subtract(const Duration(seconds: 15)),
+          direction: PacketDirection.rx,
+          rawData: _multiHopRaw(hops: [0xDE, 0xAD, 0xBE, 0xEF]),
+          responseCode: 0x88,
+          snrDb: 6.0,
+          rssiDbm: -90,
+        ),
+        _log(
+          timestamp: now.subtract(const Duration(seconds: 5)),
+          direction: PacketDirection.tx,
+          rawData: [0x03, 0x04],
+          responseCode: 0x88,
+        ),
+      ], now: now);
+
+      expect(snapshot.latestRssiDbm, -90);
+      expect(snapshot.latestSnrDb, 6.0);
+      expect(snapshot.avgRssiDbm, closeTo(-87.0, 0.01));
+      expect(snapshot.avgSnrDb, closeTo(9.0, 0.01));
+      expect(snapshot.multiHopCount, 2);
+      expect(snapshot.avgHopCount, closeTo(2.5, 0.01));
+      expect(snapshot.busyness, LiveTrafficBusyness.quiet);
+    });
+
+    test('normalizes packet rate for windows longer than one minute', () {
+      final now = DateTime(2026, 3, 12, 12, 0, 0);
+      final snapshot = LiveTrafficSummary.fromLogs(
+        List.generate(
+          24,
+          (index) => _log(
+            timestamp: now.subtract(Duration(seconds: index * 10)),
+            direction: PacketDirection.rx,
+            rawData: [0x88, 0x00, 0x00],
+            responseCode: 0x88,
+          ),
+        ),
+        now: now,
+        window: const Duration(minutes: 5),
+      );
+
+      expect(snapshot.totalCount, 24);
+      expect(snapshot.windowDuration, const Duration(minutes: 5));
+      expect(snapshot.packetsPerMinute, 5);
+    });
+
+    test('supports clearing the live view without mutating source logs', () {
+      final now = DateTime(2026, 3, 12, 12, 0, 0);
+      final clearAt = now.subtract(const Duration(seconds: 8));
+      final snapshot = LiveTrafficSummary.fromLogs([
+        _log(
+          timestamp: now.subtract(const Duration(seconds: 10)),
+          direction: PacketDirection.rx,
+          rawData: [0x88, 0x00, 0x00],
+          responseCode: 0x88,
+        ),
+        _log(
+          timestamp: now.subtract(const Duration(seconds: 4)),
+          direction: PacketDirection.rx,
+          rawData: [0x88, 0x00, 0x00],
+          responseCode: 0x88,
+        ),
+      ], now: now, clearedAt: clearAt);
+
+      expect(snapshot.totalCount, 1);
+      expect(snapshot.visibleEntries, hasLength(1));
+    });
+  });
+}

test/services/message_storage_service_test.dart

@@ -0,0 +1,115 @@
+import 'dart:typed_data';
+
+import 'package:flutter_test/flutter_test.dart';
+import 'package:meshcore_client/meshcore_client.dart';
+import 'package:meshcore_sar_app/models/message_reception_details.dart';
+import 'package:meshcore_sar_app/services/message_storage_service.dart';
+import 'package:shared_preferences/shared_preferences.dart';
+
+void main() {
+  TestWidgetsFlutterBinding.ensureInitialized();
+
+  setUp(() {
+    SharedPreferences.setMockInitialValues({});
+  });
+
+  test(
+    'retains path bytes for stored unread message when reception sidecar is missing',
+    () async {
+      final storage = MessageStorageService();
+      final message = Message(
+        id: 'msg-1',
+        messageType: MessageType.contact,
+        senderPublicKeyPrefix: Uint8List.fromList([1, 2, 3, 4, 5, 6]),
+        pathLen: 2,
+        textType: MessageTextType.plain,
+        senderTimestamp: 1700000000,
+        text: 'Unread message',
+        receivedAt: DateTime.fromMillisecondsSinceEpoch(1700000000500),
+        isRead: false,
+      );
+
+      await storage.saveMessages(
+        [message],
+        messageReceptionDetails: {
+          message.id: MessageReceptionDetails(
+            capturedAt: DateTime.fromMillisecondsSinceEpoch(1700000000600),
+            pathBytes: const [0xAA, 0xBB, 0xCC],
+          ),
+        },
+      );
+
+      final prefs = await SharedPreferences.getInstance();
+      await prefs.remove('stored_message_reception_details');
+
+      final restoredDetails = await storage.loadMessageReceptionDetails();
+      final restoredMessages = await storage.loadMessages();
+
+      expect(restoredDetails.keys, contains(message.id));
+      expect(restoredDetails[message.id]?.pathBytes, [0xAA, 0xBB, 0xCC]);
+      expect(restoredMessages.single.pathBytes, [0xAA, 0xBB, 0xCC]);
+    },
+  );
+
+  test('retains embedded reception details when sidecar is missing', () async {
+    final storage = MessageStorageService();
+    final message = Message(
+      id: 'msg-2',
+      messageType: MessageType.channel,
+      senderPublicKeyPrefix: Uint8List.fromList([6, 5, 4, 3, 2, 1]),
+      channelIdx: 2,
+      pathLen: 3,
+      textType: MessageTextType.plain,
+      senderTimestamp: 1700000100,
+      text: 'Room update',
+      receivedAt: DateTime.fromMillisecondsSinceEpoch(1700000100500),
+      isRead: false,
+    );
+
+    await storage.saveMessages(
+      [message],
+      messageReceptionDetails: {
+        message.id: MessageReceptionDetails(
+          capturedAt: DateTime.fromMillisecondsSinceEpoch(1700000100600),
+          packetLoggedAt: DateTime.fromMillisecondsSinceEpoch(1700000100400),
+          rssiDbm: -91,
+          snrDb: 7.25,
+          pathBytes: const [0xAA, 0xBB, 0xCC, 0xDD],
+          senderToReceiptMs: 1200,
+          estimatedTransmitMs: 800,
+          postTransmitDelayMs: 400,
+          receivedCopies: 3,
+        ),
+      },
+    );
+
+    final prefs = await SharedPreferences.getInstance();
+    await prefs.remove('stored_message_reception_details');
+
+    final restoredDetails = await storage.loadMessageReceptionDetails();
+    final restored = restoredDetails[message.id];
+
+    expect(restored, isNotNull);
+    expect(restored!.pathBytes, [0xAA, 0xBB, 0xCC, 0xDD]);
+    expect(restored.rssiDbm, -91);
+    expect(restored.snrDb, 7.25);
+    expect(restored.senderToReceiptMs, 1200);
+    expect(restored.estimatedTransmitMs, 800);
+    expect(restored.postTransmitDelayMs, 400);
+    expect(restored.receivedCopies, 3);
+    expect(
+      restored.packetLoggedAt,
+      DateTime.fromMillisecondsSinceEpoch(1700000100400),
+    );
+  });
+
+  test('persists removed SAR marker IDs', () async {
+    final storage = MessageStorageService();
+
+    await storage.saveRemovedSarMarkerIds({'sar-2', 'sar-1'});
+
+    final restored = await storage.loadRemovedSarMarkerIds();
+
+    expect(restored, equals({'sar-1', 'sar-2'}));
+  });
+}

test/services/notification_service_test.dart

@@ -0,0 +1,25 @@
+import 'package:flutter_test/flutter_test.dart';
+import 'package:meshcore_sar_app/services/notification_service.dart';
+import 'package:shared_preferences/shared_preferences.dart';
+
+void main() {
+  TestWidgetsFlutterBinding.ensureInitialized();
+
+  setUp(() {
+    SharedPreferences.setMockInitialValues({});
+  });
+
+  test('discovery notification preference persists independently', () async {
+    final service = NotificationService();
+
+    await service.setMessageNotificationsEnabled(true);
+    await service.setDiscoveryNotificationsEnabled(false);
+
+    final prefs = await SharedPreferences.getInstance();
+
+    expect(service.messageNotificationsEnabled, isTrue);
+    expect(service.discoveryNotificationsEnabled, isFalse);
+    expect(prefs.getBool('notifications_messages_enabled'), isTrue);
+    expect(prefs.getBool('notifications_discovery_enabled'), isFalse);
+  });
+}

test/services/path_history_service_test.dart

@@ -4,6 +4,7 @@ import 'package:flutter_test/flutter_test.dart';
 import 'package:shared_preferences/shared_preferences.dart';
 
 import 'package:meshcore_sar_app/models/contact.dart';
+import 'package:meshcore_sar_app/models/path_history.dart';
 import 'package:meshcore_sar_app/models/path_selection.dart';
 import 'package:meshcore_sar_app/services/path_history_service.dart';
 
@@ -161,15 +162,48 @@ void main() {
     expect(selection.mode, PathSelectionMode.flood);
   });
 
-  test('received public byte path is added to history', () async {
-    final service = PathHistoryService();
-    await service.initialize();
-    await service.recordReceivedBytePath('abc123', [0x01, 0x02, 0x03], 3);
+  test(
+    'received public byte path is reversed before adding to history',
+    () async {
+      final service = PathHistoryService();
+      await service.initialize();
+      await service.recordReceivedBytePath('abc123', [
+        0x01,
+        0x02,
+        0x03,
+        0x04,
+      ], 2);
 
-    final history = service.historyFor('abc123');
-    expect(history.directPaths, hasLength(1));
-    expect(history.directPaths.single.pathBytes, [0x01, 0x02, 0x03]);
-    expect(history.directPaths.single.hashSize, 3);
-    expect(history.directPaths.single.hopCount, 1);
-  });
+      final history = service.historyFor('abc123');
+      expect(history.directPaths, hasLength(1));
+      expect(history.directPaths.single.pathBytes, [0x03, 0x04, 0x01, 0x02]);
+      expect(history.directPaths.single.hashSize, 2);
+      expect(history.directPaths.single.hopCount, 2);
+      expect(history.directPaths.single.source, PathRecordSource.observed);
+    },
+  );
+
+  test(
+    'learned paths stay marked as observed after being seen on-air',
+    () async {
+      final service = PathHistoryService();
+      final contact = _buildContact(
+        seed: 3,
+        pathBytes: [0xAA, 0xBB],
+        hopCount: 2,
+        hashSize: 1,
+      );
+
+      await service.initialize();
+      await service.recordReceivedBytePath(contact.publicKeyHex, [
+        0xBB,
+        0xAA,
+      ], 1);
+      await service.recordLearnedPath(contact);
+
+      final history = service.historyFor(contact.publicKeyHex);
+      expect(history.directPaths, hasLength(1));
+      expect(history.directPaths.single.source, PathRecordSource.observed);
+    },
+  );
 }

test/utils/contact_grouping_test.dart

@@ -26,12 +26,12 @@ void main() {
     );
   }
 
-  group('ContactGrouping.buildItems', () {
+  group('ContactGrouping.inferGroups', () {
     test(
       'groups prefixed contacts only when at least four share the prefix',
       () {
         final now = DateTime(2026, 3, 10, 12);
-        final items = ContactGrouping.buildItems([
+        final groups = ContactGrouping.inferGroups([
           buildContact(seed: 1, name: 'SI-1', lastSeen: now),
           buildContact(
             seed: 2,
@@ -55,20 +55,20 @@ void main() {
           ),
         ]);
 
-        expect(items, hasLength(2));
-        expect(items.first.isGroup, isTrue);
-        expect(items.first.group!.label, 'SI-');
-        expect(
-          items.first.group!.contacts.map((contact) => contact.displayName),
-          ['SI-1', 'SI-2', 'SI-3', 'SI-4'],
-        );
-        expect(items.last.contact!.displayName, 'OTHER');
+        expect(groups, hasLength(1));
+        expect(groups.first.label, 'SI-');
+        expect(groups.first.contacts.map((contact) => contact.displayName), [
+          'SI-1',
+          'SI-2',
+          'SI-3',
+          'SI-4',
+        ]);
       },
     );
 
     test('does not group when only three contacts share a prefix', () {
       final now = DateTime(2026, 3, 10, 12);
-      final items = ContactGrouping.buildItems([
+      final groups = ContactGrouping.inferGroups([
         buildContact(seed: 1, name: 'SI-1', lastSeen: now),
         buildContact(
           seed: 2,
@@ -82,18 +82,12 @@ void main() {
         ),
       ]);
 
-      expect(items, hasLength(3));
-      expect(items.every((item) => !item.isGroup), isTrue);
+      expect(groups, isEmpty);
     });
 
-    test('orders groups and ungrouped contacts by latest last seen', () {
+    test('orders groups by latest last seen', () {
       final now = DateTime(2026, 3, 10, 12);
-      final items = ContactGrouping.buildItems([
-        buildContact(
-          seed: 1,
-          name: 'Lone',
-          lastSeen: now.subtract(const Duration(minutes: 1)),
-        ),
+      final groups = ContactGrouping.inferGroups([
         buildContact(seed: 2, name: 'SI-1', lastSeen: now),
         buildContact(
           seed: 3,
@@ -110,11 +104,261 @@ void main() {
           name: 'SI-4',
           lastSeen: now.subtract(const Duration(minutes: 4)),
         ),
+        buildContact(
+          seed: 6,
+          name: 'HR-1',
+          lastSeen: now.subtract(const Duration(minutes: 1)),
+        ),
+        buildContact(
+          seed: 7,
+          name: 'HR-2',
+          lastSeen: now.subtract(const Duration(minutes: 5)),
+        ),
+        buildContact(
+          seed: 8,
+          name: 'HR-3',
+          lastSeen: now.subtract(const Duration(minutes: 6)),
+        ),
+        buildContact(
+          seed: 9,
+          name: 'HR-4',
+          lastSeen: now.subtract(const Duration(minutes: 7)),
+        ),
       ]);
 
-      expect(items, hasLength(2));
-      expect(items.first.isGroup, isTrue);
-      expect(items.last.contact!.displayName, 'Lone');
+      expect(groups, hasLength(2));
+      expect(groups.first.label, 'SI-');
+      expect(groups.last.label, 'HR-');
+    });
+
+    test('collapses extra auto-groups into a shared parent prefix', () {
+      final now = DateTime(2026, 3, 10, 12);
+      final groups = ContactGrouping.inferGroups(
+        [
+          buildContact(seed: 1, name: 'AL-1', lastSeen: now),
+          buildContact(
+            seed: 2,
+            name: 'AL-2',
+            lastSeen: now.subtract(const Duration(minutes: 1)),
+          ),
+          buildContact(
+            seed: 3,
+            name: 'AL-3',
+            lastSeen: now.subtract(const Duration(minutes: 2)),
+          ),
+          buildContact(
+            seed: 4,
+            name: 'AL-4',
+            lastSeen: now.subtract(const Duration(minutes: 3)),
+          ),
+          buildContact(
+            seed: 5,
+            name: 'BR-1',
+            lastSeen: now.subtract(const Duration(minutes: 4)),
+          ),
+          buildContact(
+            seed: 6,
+            name: 'BR-2',
+            lastSeen: now.subtract(const Duration(minutes: 5)),
+          ),
+          buildContact(
+            seed: 7,
+            name: 'BR-3',
+            lastSeen: now.subtract(const Duration(minutes: 6)),
+          ),
+          buildContact(
+            seed: 8,
+            name: 'BR-4',
+            lastSeen: now.subtract(const Duration(minutes: 7)),
+          ),
+          buildContact(
+            seed: 9,
+            name: 'HU-PE-1',
+            lastSeen: now.subtract(const Duration(minutes: 8)),
+          ),
+          buildContact(
+            seed: 10,
+            name: 'HU-PE-2',
+            lastSeen: now.subtract(const Duration(minutes: 9)),
+          ),
+          buildContact(
+            seed: 11,
+            name: 'HU-GA-1',
+            lastSeen: now.subtract(const Duration(minutes: 10)),
+          ),
+          buildContact(
+            seed: 12,
+            name: 'HU-GA-2',
+            lastSeen: now.subtract(const Duration(minutes: 11)),
+          ),
+          buildContact(
+            seed: 13,
+            name: 'HU-PE-3',
+            lastSeen: now.subtract(const Duration(minutes: 12)),
+          ),
+          buildContact(
+            seed: 14,
+            name: 'HU-PE-4',
+            lastSeen: now.subtract(const Duration(minutes: 13)),
+          ),
+          buildContact(
+            seed: 15,
+            name: 'HU-GA-3',
+            lastSeen: now.subtract(const Duration(minutes: 14)),
+          ),
+          buildContact(
+            seed: 16,
+            name: 'HU-GA-4',
+            lastSeen: now.subtract(const Duration(minutes: 15)),
+          ),
+        ],
+        maxNamedGroups: 2,
+        overflowGroupLabel: 'Others',
+      );
+
+      expect(groups, hasLength(3));
+      expect(groups[0].label, 'AL-');
+      expect(groups[1].label, 'BR-');
+      expect(groups[2].label, 'HU-');
+      expect(groups[2].contacts.map((contact) => contact.displayName), [
+        'HU-PE-1',
+        'HU-PE-2',
+        'HU-GA-1',
+        'HU-GA-2',
+        'HU-PE-3',
+        'HU-PE-4',
+        'HU-GA-3',
+        'HU-GA-4',
+      ]);
+      expect(groups[2].matchPrefixes, ['HU-']);
+    });
+
+    test(
+      'does not create an Others bucket when overflow has no shared parent',
+      () {
+        final now = DateTime(2026, 3, 10, 12);
+        final groups = ContactGrouping.inferGroups(
+          [
+            buildContact(seed: 1, name: 'AL-1', lastSeen: now),
+            buildContact(
+              seed: 2,
+              name: 'AL-2',
+              lastSeen: now.subtract(const Duration(minutes: 1)),
+            ),
+            buildContact(
+              seed: 3,
+              name: 'AL-3',
+              lastSeen: now.subtract(const Duration(minutes: 2)),
+            ),
+            buildContact(
+              seed: 4,
+              name: 'AL-4',
+              lastSeen: now.subtract(const Duration(minutes: 3)),
+            ),
+            buildContact(
+              seed: 5,
+              name: 'BR-1',
+              lastSeen: now.subtract(const Duration(minutes: 4)),
+            ),
+            buildContact(
+              seed: 6,
+              name: 'BR-2',
+              lastSeen: now.subtract(const Duration(minutes: 5)),
+            ),
+            buildContact(
+              seed: 7,
+              name: 'BR-3',
+              lastSeen: now.subtract(const Duration(minutes: 6)),
+            ),
+            buildContact(
+              seed: 8,
+              name: 'BR-4',
+              lastSeen: now.subtract(const Duration(minutes: 7)),
+            ),
+            buildContact(
+              seed: 9,
+              name: 'CR-1',
+              lastSeen: now.subtract(const Duration(minutes: 8)),
+            ),
+            buildContact(
+              seed: 10,
+              name: 'CR-2',
+              lastSeen: now.subtract(const Duration(minutes: 9)),
+            ),
+            buildContact(
+              seed: 11,
+              name: 'CR-3',
+              lastSeen: now.subtract(const Duration(minutes: 10)),
+            ),
+            buildContact(
+              seed: 12,
+              name: 'CR-4',
+              lastSeen: now.subtract(const Duration(minutes: 11)),
+            ),
+          ],
+          maxNamedGroups: 2,
+          overflowGroupLabel: 'Others',
+        );
+
+        expect(groups.map((group) => group.label), ['AL-', 'BR-', 'CR-']);
+      },
+    );
+  });
+
+  group('ContactGrouping.contactMatchesInferredGroupLabel', () {
+    test('matches the inferred auto-group label for prefixed contacts', () {
+      final contact = buildContact(
+        seed: 99,
+        name: 'SI-1',
+        lastSeen: DateTime(2026, 3, 10, 12),
+      );
+
+      expect(
+        ContactGrouping.contactMatchesInferredGroupLabel(contact, 'SI-'),
+        isTrue,
+      );
+      expect(
+        ContactGrouping.contactMatchesInferredGroupLabel(contact, 'si'),
+        isTrue,
+      );
+    });
+
+    test('returns false when a contact has no inferred auto-group label', () {
+      final contact = buildContact(
+        seed: 100,
+        name: 'Lone Contact',
+        lastSeen: DateTime(2026, 3, 10, 12),
+      );
+
+      expect(
+        ContactGrouping.contactMatchesInferredGroupLabel(contact, 'SI'),
+        isFalse,
+      );
+    });
+
+    test('finds a shared inferred label for related repeater names', () {
+      final contacts = [
+        buildContact(
+          seed: 101,
+          name: 'HU-PE',
+          lastSeen: DateTime(2026, 3, 10, 12),
+        ),
+        buildContact(
+          seed: 102,
+          name: 'HU-GA',
+          lastSeen: DateTime(2026, 3, 10, 11, 59),
+        ),
+      ];
+
+      expect(ContactGrouping.sharedInferredGroupLabel(contacts), 'HU-');
+    });
+
+    test('finds a shared parent label for related subgroup prefixes', () {
+      expect(
+        ContactGrouping.sharedParentGroupLabel(['HU-PE-', 'HU-GA-']),
+        'HU-',
+      );
+      expect(ContactGrouping.sharedParentGroupLabel(['AL-', 'BR-']), isNull);
     });
   });
 }

test/utils/log_rx_route_decoder_test.dart

@@ -116,6 +116,21 @@ void main() {
       expect(resolved.matchCount, 2);
     });
   });
+
+  group('LogRxRouteDecoder.reverseHopBytes', () {
+    test('reverses path by hop size', () {
+      final reversed = LogRxRouteDecoder.reverseHopBytes([
+        0xc2,
+        0xba,
+        0x5f,
+        0xde,
+        0xaa,
+        0xbb,
+      ], hashSize: 2);
+
+      expect(reversed, [0xaa, 0xbb, 0x5f, 0xde, 0xc2, 0xba]);
+    });
+  });
 }
 
 Contact _contact({required String name, required List<int> keyPrefix}) {

test/utils/trace_node_resolver_test.dart

@@ -0,0 +1,166 @@
+import 'package:flutter_test/flutter_test.dart';
+import 'package:latlong2/latlong.dart';
+import 'package:meshcore_sar_app/services/mesh_map_nodes_service.dart';
+import 'package:meshcore_sar_app/utils/trace_node_resolver.dart';
+
+void main() {
+  test(
+    'prefers closest local repeater over online fallback for shared prefix',
+    () {
+      final localNear = _node(
+        name: 'Near Local',
+        publicKey: 'aa1100',
+        latitude: 46.05,
+        longitude: 14.50,
+      );
+      final localFar = _node(
+        name: 'Far Local',
+        publicKey: 'aa2200',
+        latitude: 46.40,
+        longitude: 14.90,
+      );
+      final online = _node(
+        name: 'Online',
+        publicKey: 'aa3300',
+        latitude: 46.06,
+        longitude: 14.51,
+      );
+
+      final resolved = TraceNodeResolver.resolveBest(
+        nodes: [localNear, localFar, online],
+        localPublicKeys: {localNear.publicKey, localFar.publicKey},
+        prefixHex: 'aa',
+        referenceA: const LatLng(46.0, 14.5),
+        referenceB: const LatLng(46.1, 14.5),
+      );
+
+      expect(resolved.node?.name, 'Near Local');
+      expect(resolved.usedOnlineFallback, isFalse);
+      expect(resolved.matchCount, 2);
+      expect(resolved.matchSummary, '2 local matches');
+    },
+  );
+
+  test('falls back to online node only when local match is missing', () {
+    final online = _node(
+      name: 'Online Only',
+      publicKey: 'bb1100',
+      latitude: 46.06,
+      longitude: 14.51,
+    );
+
+    final resolved = TraceNodeResolver.resolveBest(
+      nodes: [online],
+      localPublicKeys: const {},
+      prefixHex: 'bb',
+      referenceA: const LatLng(46.0, 14.5),
+      referenceB: const LatLng(46.1, 14.5),
+    );
+
+    expect(resolved.node?.name, 'Online Only');
+    expect(resolved.usedOnlineFallback, isTrue);
+    expect(resolved.matchCount, 1);
+  });
+
+  test('cycles through ambiguous local prefix matches', () {
+    final first = _node(
+      name: 'First Match',
+      publicKey: 'cc1100',
+      latitude: 46.08,
+      longitude: 14.52,
+    );
+    final second = _node(
+      name: 'Second Match',
+      publicKey: 'cc11ff',
+      latitude: 46.09,
+      longitude: 14.53,
+    );
+
+    final resolved = TraceNodeResolver.resolveBest(
+      nodes: [second, first],
+      localPublicKeys: {first.publicKey, second.publicKey},
+      prefixHex: 'cc11',
+    );
+
+    expect(resolved.matchCount, 2);
+    expect(resolved.canCycle, isTrue);
+    expect(resolved.node?.name, 'Second Match');
+    expect(resolved.cycle().node?.name, 'First Match');
+    expect(resolved.cycle().cycle().node?.name, 'Second Match');
+  });
+
+  test('aligns ambiguous hops to the closest continuous path', () {
+    final start = _node(
+      name: 'Start',
+      publicKey: 'start00',
+      latitude: 46.000,
+      longitude: 14.000,
+    );
+    final end = _node(
+      name: 'End',
+      publicKey: 'end000',
+      latitude: 46.300,
+      longitude: 14.300,
+    );
+    final hop1Near = _node(
+      name: 'Hop 1 Near',
+      publicKey: 'aa1100',
+      latitude: 46.100,
+      longitude: 14.100,
+    );
+    final hop1Far = _node(
+      name: 'Hop 1 Far',
+      publicKey: 'aa11ff',
+      latitude: 46.250,
+      longitude: 14.000,
+    );
+    final hop2Near = _node(
+      name: 'Hop 2 Near',
+      publicKey: 'bb2200',
+      latitude: 46.200,
+      longitude: 14.200,
+    );
+    final hop2Far = _node(
+      name: 'Hop 2 Far',
+      publicKey: 'bb22ff',
+      latitude: 46.050,
+      longitude: 14.280,
+    );
+
+    final aligned = TraceNodeResolver.alignPathSelections(
+      nodes: [
+        TraceNodeResolver.resolveBest(
+          nodes: [hop1Far, hop1Near],
+          localPublicKeys: {hop1Near.publicKey, hop1Far.publicKey},
+          prefixHex: 'aa11',
+        ),
+        TraceNodeResolver.resolveBest(
+          nodes: [hop2Far, hop2Near],
+          localPublicKeys: {hop2Near.publicKey, hop2Far.publicKey},
+          prefixHex: 'bb22',
+        ),
+      ],
+      startNode: start,
+      endNode: end,
+    );
+
+    expect(aligned[0].node?.name, 'Hop 1 Near');
+    expect(aligned[1].node?.name, 'Hop 2 Near');
+  });
+}
+
+MeshMapNode _node({
+  required String name,
+  required String publicKey,
+  required double latitude,
+  required double longitude,
+}) {
+  return MeshMapNode(
+    type: 1,
+    name: name,
+    publicKey: publicKey,
+    latitude: latitude,
+    longitude: longitude,
+    updatedAtMs: 1,
+  );
+}

test/widgets/add_channel_dialog_test.dart

@@ -4,7 +4,7 @@ import 'package:meshcore_sar_app/l10n/app_localizations.dart';
 import 'package:meshcore_sar_app/widgets/contacts/add_channel_dialog.dart';
 
 void main() {
-  Future<void> pumpDialog(
+  Future<void> pumpSheet(
     WidgetTester tester, {
     required Future<void> Function(String name, String secret) onCreateChannel,
   }) async {
@@ -15,7 +15,7 @@ void main() {
         home: Scaffold(
           body: Builder(
             builder: (context) => Center(
-              child: AddChannelDialog(onCreateChannel: onCreateChannel),
+              child: AddChannelSheet(onCreateChannel: onCreateChannel),
             ),
           ),
         ),
@@ -27,7 +27,7 @@ void main() {
     String? submittedName;
     String? submittedSecret;
 
-    await pumpDialog(
+    await pumpSheet(
       tester,
       onCreateChannel: (name, secret) async {
         submittedName = name;
@@ -47,7 +47,7 @@ void main() {
   testWidgets('uses done action for hash channels', (tester) async {
     String? submittedName;
 
-    await pumpDialog(
+    await pumpSheet(
       tester,
       onCreateChannel: (name, secret) async {
         submittedName = name;

test/widgets/bidirectional_refresh_test.dart

@@ -0,0 +1,90 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:meshcore_sar_app/widgets/common/bidirectional_refresh.dart';
+
+void main() {
+  Future<BuildContext> pumpRefreshHarness(
+    WidgetTester tester, {
+    required Future<void> Function() onRefresh,
+  }) {
+    late BuildContext childContext;
+
+    return tester
+        .pumpWidget(
+          MaterialApp(
+            home: Scaffold(
+              body: BidirectionalRefresh(
+                onRefresh: onRefresh,
+                child: Builder(
+                  builder: (context) {
+                    childContext = context;
+                    return const SizedBox.expand();
+                  },
+                ),
+              ),
+            ),
+          ),
+        )
+        .then((_) => childContext);
+  }
+
+  OverscrollNotification topOverscroll(BuildContext context) {
+    return OverscrollNotification(
+      metrics: FixedScrollMetrics(
+        minScrollExtent: 0,
+        maxScrollExtent: 500,
+        pixels: 0,
+        viewportDimension: 300,
+        axisDirection: AxisDirection.down,
+        devicePixelRatio: 1,
+      ),
+      context: context,
+      overscroll: -120,
+    );
+  }
+
+  OverscrollNotification bottomOverscroll(BuildContext context) {
+    return OverscrollNotification(
+      metrics: FixedScrollMetrics(
+        minScrollExtent: 0,
+        maxScrollExtent: 500,
+        pixels: 500,
+        viewportDimension: 300,
+        axisDirection: AxisDirection.down,
+        devicePixelRatio: 1,
+      ),
+      context: context,
+      overscroll: 120,
+    );
+  }
+
+  testWidgets('refresh triggers from top overscroll', (tester) async {
+    var refreshCount = 0;
+    final childContext = await pumpRefreshHarness(
+      tester,
+      onRefresh: () async {
+        refreshCount++;
+      },
+    );
+
+    topOverscroll(childContext).dispatch(childContext);
+    await tester.pump();
+
+    expect(refreshCount, 1);
+  });
+
+  testWidgets('refresh triggers from bottom overscroll', (tester) async {
+    var refreshCount = 0;
+    final childContext = await pumpRefreshHarness(
+      tester,
+      onRefresh: () async {
+        refreshCount++;
+      },
+    );
+
+    bottomOverscroll(childContext).dispatch(childContext);
+    await tester.pump();
+
+    expect(refreshCount, 1);
+  });
+}

test/widgets/contact_avatar_test.dart

@@ -31,7 +31,9 @@ void main() {
   Future<void> pumpAvatar(WidgetTester tester, Contact contact) async {
     await tester.pumpWidget(
       MaterialApp(
-        home: Scaffold(body: Center(child: ContactAvatar(contact: contact))),
+        home: Scaffold(
+          body: Center(child: ContactAvatar(contact: contact)),
+        ),
       ),
     );
   }
@@ -85,7 +87,11 @@ void main() {
   testWidgets('renders non-hash label avatar for channels', (tester) async {
     await pumpAvatar(
       tester,
-      buildContact(name: 'Command Net', type: ContactType.channel, secondByte: 3),
+      buildContact(
+        name: 'Command Net',
+        type: ContactType.channel,
+        secondByte: 3,
+      ),
     );
 
     expect(find.text('CN'), findsOneWidget);
@@ -103,4 +109,15 @@ void main() {
     expect(find.byType(CircleAvatar), findsOneWidget);
     expect(find.byIcon(Icons.person), findsNothing);
   });
+
+  testWidgets('renders sensor icon avatar for sensor contacts', (tester) async {
+    await pumpAvatar(
+      tester,
+      buildContact(name: 'WX Station', type: ContactType.sensor),
+    );
+
+    expect(find.byType(CircleAvatar), findsOneWidget);
+    expect(find.byIcon(Icons.sensors), findsOneWidget);
+    expect(find.text('WS'), findsNothing);
+  });
 }

test/widgets/contact_tile_test.dart

@@ -0,0 +1,193 @@
+import 'dart:typed_data';
+
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:meshcore_sar_app/l10n/app_localizations.dart';
+import 'package:meshcore_sar_app/models/contact.dart';
+import 'package:meshcore_sar_app/providers/connection_provider.dart';
+import 'package:meshcore_sar_app/providers/contacts_provider.dart';
+import 'package:meshcore_sar_app/providers/map_provider.dart';
+import 'package:meshcore_sar_app/providers/messages_provider.dart';
+import 'package:meshcore_sar_app/providers/sensors_provider.dart';
+import 'package:meshcore_sar_app/widgets/contacts/contact_tile.dart';
+import 'package:meshcore_sar_app/widgets/sensors/sensor_telemetry_card.dart';
+import 'package:provider/provider.dart';
+import 'package:shared_preferences/shared_preferences.dart';
+
+void main() {
+  setUp(() {
+    SharedPreferences.setMockInitialValues({});
+  });
+
+  Contact buildContact({
+    required String name,
+    required ContactType type,
+    int secondByte = 1,
+  }) {
+    final publicKey = Uint8List(32);
+    publicKey[1] = secondByte;
+
+    return Contact(
+      publicKey: publicKey,
+      type: type,
+      flags: 0,
+      outPathLen: 0,
+      outPath: Uint8List(64),
+      advName: name,
+      lastAdvert: DateTime.now().millisecondsSinceEpoch ~/ 1000,
+      advLat: 46562000,
+      advLon: 14950000,
+      lastMod: DateTime.now().millisecondsSinceEpoch ~/ 1000,
+    );
+  }
+
+  Future<void> pumpTile(
+    WidgetTester tester,
+    Contact contact, {
+    SensorsProvider? sensorsProvider,
+  }) async {
+    final resolvedSensorsProvider = sensorsProvider ?? SensorsProvider();
+    await tester.pumpWidget(
+      MultiProvider(
+        providers: [
+          ChangeNotifierProvider(create: (_) => ConnectionProvider()),
+          ChangeNotifierProvider(create: (_) => ContactsProvider()),
+          ChangeNotifierProvider(create: (_) => MessagesProvider()),
+          ChangeNotifierProvider<SensorsProvider>.value(
+            value: resolvedSensorsProvider,
+          ),
+          ChangeNotifierProvider(create: (_) => MapProvider()),
+        ],
+        child: MaterialApp(
+          localizationsDelegates: AppLocalizations.localizationsDelegates,
+          supportedLocales: AppLocalizations.supportedLocales,
+          home: Scaffold(body: ContactTile(contact: contact)),
+        ),
+      ),
+    );
+  }
+
+  testWidgets('shows trace action for non-channel contacts', (tester) async {
+    await pumpTile(
+      tester,
+      buildContact(name: 'John Smith', type: ContactType.chat),
+    );
+
+    await tester.tap(find.text('John Smith'));
+    await tester.pumpAndSettle();
+
+    expect(find.text('Trace'), findsOneWidget);
+  });
+
+  testWidgets('does not show trace action for channels', (tester) async {
+    await pumpTile(
+      tester,
+      buildContact(name: 'Ops', type: ContactType.channel, secondByte: 3),
+    );
+
+    await tester.tap(find.text('Ops'));
+    await tester.pumpAndSettle();
+
+    expect(find.text('Trace'), findsNothing);
+  });
+
+  testWidgets('shows overridden contact name as primary label', (tester) async {
+    await pumpTile(
+      tester,
+      buildContact(
+        name: 'John Smith',
+        type: ContactType.chat,
+      ).copyWith(nameOverride: 'Rescue One'),
+    );
+
+    expect(find.text('Rescue One'), findsOneWidget);
+    expect(find.text('John Smith'), findsNothing);
+  });
+
+  testWidgets('hides public key in contact tile', (tester) async {
+    final contact = buildContact(name: 'John Smith', type: ContactType.chat);
+
+    await pumpTile(tester, contact);
+
+    expect(find.text(contact.publicKeyShort), findsNothing);
+    expect(find.byIcon(Icons.key_outlined), findsNothing);
+  });
+
+  testWidgets('sensor contacts can be added to sensors', (tester) async {
+    await pumpTile(
+      tester,
+      buildContact(name: 'WX Station', type: ContactType.sensor),
+    );
+
+    await tester.tap(find.text('WX Station'));
+    await tester.pumpAndSettle();
+
+    expect(find.text('Add to Sensors'), findsOneWidget);
+  });
+
+  testWidgets('sensor preview shows telemetry card', (tester) async {
+    final contact = buildContact(name: 'WX Station', type: ContactType.sensor)
+        .copyWith(
+          telemetry: ContactTelemetry(
+            batteryPercentage: 84,
+            temperature: 21.5,
+            humidity: 58.0,
+            extraSensorData: const {
+              '__source_channel:battery': 1,
+              '__source_channel:temperature': 1,
+              '__source_channel:humidity': 1,
+              'co2': 415.0,
+              'illuminance_2': 500.0,
+              'current_2': 0.015,
+              'power_2': 0.25,
+              'distance_2': 1.234,
+            },
+            timestamp: DateTime.now().subtract(const Duration(minutes: 1)),
+          ),
+        );
+
+    await pumpTile(tester, contact);
+
+    await tester.tap(find.text('WX Station'));
+    await tester.pumpAndSettle();
+
+    expect(find.text('Preview'), findsOneWidget);
+
+    await tester.tap(find.text('Preview'));
+    await tester.pumpAndSettle();
+
+    expect(find.byIcon(Icons.close), findsOneWidget);
+    expect(find.text('Battery'), findsOneWidget);
+    expect(find.text('84%'), findsOneWidget);
+    expect(find.text('Temperature'), findsOneWidget);
+    expect(find.text('21.5°C'), findsOneWidget);
+    expect(find.text('CO2'), findsOneWidget);
+    expect(find.text('415 ppm'), findsOneWidget);
+    expect(find.text('Illuminance'), findsOneWidget);
+    expect(find.text('~4.2 W/m2 daylight'), findsOneWidget);
+    expect(find.text('Current'), findsOneWidget);
+    expect(find.text('15 mA'), findsOneWidget);
+    expect(find.text('Power'), findsOneWidget);
+    expect(find.text('Distance'), findsOneWidget);
+    expect(
+      find.byKey(const ValueKey('sensor_metric_channel_battery')),
+      findsOneWidget,
+    );
+    expect(find.text('ch1'), findsWidgets);
+    expect(
+      find.byKey(const ValueKey('sensor_metric_channel_extra:illuminance_2')),
+      findsOneWidget,
+    );
+
+    final sensorCardSize = tester.getSize(find.byType(SensorTelemetryCard));
+    final batteryTileSize = tester.getSize(
+      find.byKey(const ValueKey('sensor_metric_battery')),
+    );
+    expect(batteryTileSize.width, greaterThan(sensorCardSize.width * 0.8));
+
+    await tester.tap(find.byIcon(Icons.close));
+    await tester.pumpAndSettle();
+
+    expect(find.byType(SensorTelemetryCard), findsNothing);
+  });
+}

test/widgets/recipient_selector_sheet_test.dart

@@ -71,4 +71,31 @@ void main() {
     expect(find.text('7'), findsOneWidget);
     expect(find.text('3'), findsOneWidget);
   });
+
+  testWidgets('can hide show all option for contact-only flows', (
+    tester,
+  ) async {
+    final contact = buildContact(name: 'John Smith', type: ContactType.chat);
+
+    await tester.pumpWidget(
+      MaterialApp(
+        localizationsDelegates: AppLocalizations.localizationsDelegates,
+        supportedLocales: AppLocalizations.supportedLocales,
+        home: Scaffold(
+          body: RecipientSelectorSheet(
+            contacts: [contact],
+            rooms: const [],
+            channels: const [],
+            unreadCount: 0,
+            unreadCountsByPublicKey: const {},
+            showAllOption: false,
+            onSelect: (selectedRecipient, draftMessage) {},
+          ),
+        ),
+      ),
+    );
+
+    expect(find.text('Show all'), findsNothing);
+    expect(find.text('John Smith'), findsOneWidget);
+  });
 }

test/widgets/sensor_auto_refresh_options_test.dart

@@ -0,0 +1,38 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:meshcore_sar_app/screens/sensors_tab.dart';
+
+void main() {
+  testWidgets('renders expanded auto refresh intervals and selects value', (
+    tester,
+  ) async {
+    var selected = 0;
+
+    await tester.pumpWidget(
+      MaterialApp(
+        home: Scaffold(
+          body: SensorAutoRefreshOptions(
+            selectedMinutes: selected,
+            onSelected: (minutes) {
+              selected = minutes;
+            },
+          ),
+        ),
+      ),
+    );
+
+    expect(find.text('Off'), findsOneWidget);
+    expect(find.text('5m'), findsOneWidget);
+    expect(find.text('15m'), findsOneWidget);
+    expect(find.text('30m'), findsOneWidget);
+    expect(find.text('60m'), findsOneWidget);
+    expect(find.text('6h'), findsOneWidget);
+    expect(find.text('12h'), findsOneWidget);
+    expect(find.text('24h'), findsOneWidget);
+
+    await tester.tap(find.text('24h'));
+    await tester.pump();
+
+    expect(selected, 1440);
+  });
+}

test/widgets/sensor_metric_selector_item_test.dart

@@ -0,0 +1,91 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:meshcore_sar_app/screens/sensors_tab.dart';
+import 'package:meshcore_sar_app/widgets/sensors/sensor_telemetry_card.dart';
+
+void main() {
+  testWidgets('renders selector previews and channel badges', (tester) async {
+    await tester.pumpWidget(
+      MaterialApp(
+        home: Scaffold(
+          body: SensorMetricSelectorItem(
+            option: const SensorMetricOption(
+              key: 'extra:illuminance_2',
+              label: 'Illuminance (ch 2)',
+              defaultLabel: 'Illuminance',
+              channel: 2,
+              valuePreview: '500 lx',
+              previewCardData: SensorMetricCardData(
+                fieldKey: 'extra:illuminance_2',
+                icon: Icons.light_mode_outlined,
+                label: 'Illuminance',
+                value: '500 lx',
+                accent: Color(0xFFC17B1D),
+                channel: 2,
+              ),
+            ),
+            visible: true,
+            span: 1,
+            canMoveUp: true,
+            canMoveDown: true,
+            onToggle: (_) {},
+            onRename: () {},
+            onMoveUp: () {},
+            onMoveDown: () {},
+            onSpanChanged: (_) {},
+          ),
+        ),
+      ),
+    );
+
+    expect(find.text('Show on sensor card'), findsOneWidget);
+    expect(find.text('500 lx'), findsOneWidget);
+    expect(
+      find.byKey(const ValueKey('sensor_selector_channel_extra:illuminance_2')),
+      findsOneWidget,
+    );
+    expect(find.text('Channel 2'), findsOneWidget);
+  });
+
+  testWidgets('omits duplicate channel chip for channel 1', (tester) async {
+    await tester.pumpWidget(
+      MaterialApp(
+        home: Scaffold(
+          body: SensorMetricSelectorItem(
+            option: const SensorMetricOption(
+              key: 'battery',
+              label: 'Battery',
+              defaultLabel: 'Battery',
+              channel: 1,
+              valuePreview: '84%',
+              previewCardData: SensorMetricCardData(
+                fieldKey: 'battery',
+                icon: Icons.battery_5_bar,
+                label: 'Battery',
+                value: '84%',
+                accent: Color(0xFF4B8E2F),
+                channel: 1,
+              ),
+            ),
+            visible: true,
+            span: 1,
+            canMoveUp: true,
+            canMoveDown: true,
+            onToggle: (_) {},
+            onRename: () {},
+            onMoveUp: () {},
+            onMoveDown: () {},
+            onSpanChanged: (_) {},
+          ),
+        ),
+      ),
+    );
+
+    expect(find.text('Rename'), findsOneWidget);
+    expect(
+      find.byKey(const ValueKey('sensor_selector_channel_battery')),
+      findsNothing,
+    );
+    expect(find.text('Channel 1'), findsNothing);
+  });
+}

test/widgets/sensor_telemetry_card_test.dart

@@ -0,0 +1,190 @@
+import 'dart:typed_data';
+
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:meshcore_sar_app/l10n/app_localizations.dart';
+import 'package:meshcore_sar_app/models/contact.dart';
+import 'package:meshcore_sar_app/providers/sensors_provider.dart';
+import 'package:meshcore_sar_app/widgets/sensors/sensor_telemetry_card.dart';
+
+void main() {
+  Contact buildContact() {
+    final publicKey = Uint8List(32);
+    publicKey[0] = 0x44;
+
+    return Contact(
+      publicKey: publicKey,
+      type: ContactType.sensor,
+      flags: 0,
+      outPathLen: 0,
+      outPath: Uint8List(64),
+      advName: 'WX Station',
+      lastAdvert: DateTime.now().millisecondsSinceEpoch ~/ 1000,
+      advLat: 0,
+      advLon: 0,
+      lastMod: DateTime.now().millisecondsSinceEpoch ~/ 1000,
+      telemetry: ContactTelemetry(
+        temperature: 21.5,
+        extraSensorData: const {
+          '__source_channel:temperature': 1,
+          'illuminance_2': 500.0,
+        },
+        timestamp: DateTime.now().subtract(const Duration(minutes: 1)),
+      ),
+    );
+  }
+
+  testWidgets('renders custom labels and channel badges', (tester) async {
+    final contact = buildContact();
+
+    await tester.pumpWidget(
+      MaterialApp(
+        localizationsDelegates: AppLocalizations.localizationsDelegates,
+        supportedLocales: AppLocalizations.supportedLocales,
+        home: Scaffold(
+          body: SensorTelemetryCard(
+            contact: contact,
+            state: SensorRefreshState.idle,
+            visibleFields: const {'temperature', 'extra:illuminance_2'},
+            labelOverrides: const {
+              'temperature': 'Ambient',
+              'extra:illuminance_2': 'Light',
+            },
+            fieldSpans: sensorFullWidthFieldSpans(const {
+              'temperature',
+              'extra:illuminance_2',
+            }),
+          ),
+        ),
+      ),
+    );
+
+    expect(find.text('Ambient'), findsOneWidget);
+    expect(find.text('Light'), findsOneWidget);
+    expect(find.text('Temperature'), findsNothing);
+    expect(find.text('Illuminance'), findsNothing);
+    expect(
+      find.byKey(const ValueKey('sensor_metric_channel_temperature')),
+      findsOneWidget,
+    );
+    expect(
+      find.byKey(const ValueKey('sensor_metric_channel_extra:illuminance_2')),
+      findsOneWidget,
+    );
+  });
+
+  testWidgets('renders metrics in the provided order', (tester) async {
+    final publicKey = Uint8List(32);
+    publicKey[0] = 0x45;
+    final contact = Contact(
+      publicKey: publicKey,
+      type: ContactType.sensor,
+      flags: 0,
+      outPathLen: 0,
+      outPath: Uint8List(64),
+      advName: 'WX Station',
+      lastAdvert: DateTime.now().millisecondsSinceEpoch ~/ 1000,
+      advLat: 0,
+      advLon: 0,
+      lastMod: DateTime.now().millisecondsSinceEpoch ~/ 1000,
+      telemetry: ContactTelemetry(
+        batteryPercentage: 84,
+        temperature: 21.5,
+        extraSensorData: const {
+          '__source_channel:battery': 1,
+          '__source_channel:temperature': 1,
+          'illuminance_2': 500.0,
+        },
+        timestamp: DateTime.now().subtract(const Duration(minutes: 1)),
+      ),
+    );
+
+    await tester.pumpWidget(
+      MaterialApp(
+        localizationsDelegates: AppLocalizations.localizationsDelegates,
+        supportedLocales: AppLocalizations.supportedLocales,
+        home: Scaffold(
+          body: SensorTelemetryCard(
+            contact: contact,
+            state: SensorRefreshState.idle,
+            visibleFields: const {
+              'battery',
+              'temperature',
+              'extra:illuminance_2',
+            },
+            fieldOrder: const ['extra:illuminance_2', 'temperature', 'battery'],
+            fieldSpans: sensorFullWidthFieldSpans(const {
+              'battery',
+              'temperature',
+              'extra:illuminance_2',
+            }),
+          ),
+        ),
+      ),
+    );
+
+    final illuminanceTop = tester.getTopLeft(
+      find.byKey(const ValueKey('sensor_metric_extra:illuminance_2')),
+    );
+    final temperatureTop = tester.getTopLeft(
+      find.byKey(const ValueKey('sensor_metric_temperature')),
+    );
+    final batteryTop = tester.getTopLeft(
+      find.byKey(const ValueKey('sensor_metric_battery')),
+    );
+
+    expect(illuminanceTop.dy, lessThan(temperatureTop.dy));
+    expect(temperatureTop.dy, lessThan(batteryTop.dy));
+  });
+
+  testWidgets('renders MeshCore custom weather metrics', (tester) async {
+    final publicKey = Uint8List(32);
+    publicKey[0] = 0x46;
+    final contact = Contact(
+      publicKey: publicKey,
+      type: ContactType.sensor,
+      flags: 0,
+      outPathLen: 0,
+      outPath: Uint8List(64),
+      advName: 'WX Station',
+      lastAdvert: DateTime.now().millisecondsSinceEpoch ~/ 1000,
+      advLat: 0,
+      advLon: 0,
+      lastMod: DateTime.now().millisecondsSinceEpoch ~/ 1000,
+      telemetry: ContactTelemetry(
+        timestamp: DateTime.now().subtract(const Duration(minutes: 1)),
+        extraSensorData: const {'gust_2': 3.7, 'dew_2': 2.0, 'rain_2': 12.3},
+      ),
+    );
+
+    await tester.pumpWidget(
+      MaterialApp(
+        localizationsDelegates: AppLocalizations.localizationsDelegates,
+        supportedLocales: AppLocalizations.supportedLocales,
+        home: Scaffold(
+          body: SensorTelemetryCard(
+            contact: contact,
+            state: SensorRefreshState.idle,
+            visibleFields: const {
+              'extra:gust_2',
+              'extra:dew_2',
+              'extra:rain_2',
+            },
+            fieldSpans: sensorFullWidthFieldSpans(const {
+              'extra:gust_2',
+              'extra:dew_2',
+              'extra:rain_2',
+            }),
+          ),
+        ),
+      ),
+    );
+
+    expect(find.text('Wind gust'), findsOneWidget);
+    expect(find.text('Dew point'), findsOneWidget);
+    expect(find.text('Rain'), findsOneWidget);
+    expect(find.text('3.7 m/s'), findsOneWidget);
+    expect(find.text('2°C'), findsOneWidget);
+    expect(find.text('12.3 mm'), findsOneWidget);
+  });
+}