Redesign contact import screen

Feat/sensor telemetry preview

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 = 115;
+				CURRENT_PROJECT_VERSION = 117;
 				DEVELOPMENT_TEAM = JND55328G8;
 				ENABLE_BITCODE = NO;
 				INFOPLIST_FILE = Runner/Info.plist;
@@ -511,7 +511,7 @@
 			buildSettings = {
 				BUNDLE_LOADER = "$(TEST_HOST)";
 				CODE_SIGN_STYLE = Automatic;
-				CURRENT_PROJECT_VERSION = 115;
+				CURRENT_PROJECT_VERSION = 117;
 				DEVELOPMENT_TEAM = JND55328G8;
 				GENERATE_INFOPLIST_FILE = YES;
 				MARKETING_VERSION = 1.0;
@@ -530,7 +530,7 @@
 			buildSettings = {
 				BUNDLE_LOADER = "$(TEST_HOST)";
 				CODE_SIGN_STYLE = Automatic;
-				CURRENT_PROJECT_VERSION = 115;
+				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 = 115;
+				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 = 115;
+				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 = 115;
+				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>115</string>
+	<string>117</string>
 	<key>LSRequiresIPhoneOS</key>
 	<true/>
 	<key>ITSAppUsesNonExemptEncryption</key>

ios/fastlane/report.xml

@@ -5,24 +5,22 @@
     
     
       
-      <testcase classname="fastlane.lanes" name="0: default_platform" time="0.001473">
+      <testcase classname="fastlane.lanes" name="0: default_platform" time="0.00024">
         
       </testcase>
     
       
-      <testcase classname="fastlane.lanes" name="1: increment_build_number" time="0.569758">
+      <testcase classname="fastlane.lanes" name="1: increment_build_number" time="0.554978">
         
       </testcase>
     
       
-      <testcase classname="fastlane.lanes" name="2: build_app" time="95.271262">
+      <testcase classname="fastlane.lanes" name="2: build_app" time="100.17557">
         
       </testcase>
     
       
-      <testcase classname="fastlane.lanes" name="3: upload_to_app_store" time="91.795184">
-        
-          <failure message="/opt/homebrew/Cellar/fastlane/2.231.1/libexec/gems/fastlane-2.231.1/fastlane/lib/fastlane/actions/actions_helper.rb:67:in &apos;Fastlane::Actions.execute_action&apos;&#10;/opt/homebrew/Cellar/fastlane/2.231.1/libexec/gems/fastlane-2.231.1/fastlane/lib/fastlane/runner.rb:255:in &apos;block in Fastlane::Runner#execute_action&apos;&#10;/opt/homebrew/Cellar/fastlane/2.231.1/libexec/gems/fastlane-2.231.1/fastlane/lib/fastlane/runner.rb:229:in &apos;Dir.chdir&apos;&#10;/opt/homebrew/Cellar/fastlane/2.231.1/libexec/gems/fastlane-2.231.1/fastlane/lib/fastlane/runner.rb:229:in &apos;Fastlane::Runner#execute_action&apos;&#10;/opt/homebrew/Cellar/fastlane/2.231.1/libexec/gems/fastlane-2.231.1/fastlane/lib/fastlane/runner.rb:157:in &apos;Fastlane::Runner#trigger_action_by_name&apos;&#10;/opt/homebrew/Cellar/fastlane/2.231.1/libexec/gems/fastlane-2.231.1/fastlane/lib/fastlane/fast_file.rb:159:in &apos;Fastlane::FastFile#method_missing&apos;&#10;Fastfile:23:in &apos;block (2 levels) in Fastlane::FastFile#parsing_binding&apos;&#10;/opt/homebrew/Cellar/fastlane/2.231.1/libexec/gems/fastlane-2.231.1/fastlane/lib/fastlane/lane.rb:41:in &apos;Fastlane::Lane#call&apos;&#10;/opt/homebrew/Cellar/fastlane/2.231.1/libexec/gems/fastlane-2.231.1/fastlane/lib/fastlane/runner.rb:49:in &apos;block in Fastlane::Runner#execute&apos;&#10;/opt/homebrew/Cellar/fastlane/2.231.1/libexec/gems/fastlane-2.231.1/fastlane/lib/fastlane/runner.rb:45:in &apos;Dir.chdir&apos;&#10;/opt/homebrew/Cellar/fastlane/2.231.1/libexec/gems/fastlane-2.231.1/fastlane/lib/fastlane/runner.rb:45:in &apos;Fastlane::Runner#execute&apos;&#10;/opt/homebrew/Cellar/fastlane/2.231.1/libexec/gems/fastlane-2.231.1/fastlane/lib/fastlane/lane_manager.rb:46:in &apos;Fastlane::LaneManager.cruise_lane&apos;&#10;/opt/homebrew/Cellar/fastlane/2.231.1/libexec/gems/fastlane-2.231.1/fastlane/lib/fastlane/command_line_handler.rb:34:in &apos;Fastlane::CommandLineHandler.handle&apos;&#10;/opt/homebrew/Cellar/fastlane/2.231.1/libexec/gems/fastlane-2.231.1/fastlane/lib/fastlane/commands_generator.rb:110:in &apos;block (2 levels) in Fastlane::CommandsGenerator#run&apos;&#10;/opt/homebrew/Cellar/fastlane/2.231.1/libexec/gems/commander-4.6.0/lib/commander/command.rb:187:in &apos;Commander::Command#call&apos;&#10;/opt/homebrew/Cellar/fastlane/2.231.1/libexec/gems/commander-4.6.0/lib/commander/command.rb:157:in &apos;Commander::Command#run&apos;&#10;/opt/homebrew/Cellar/fastlane/2.231.1/libexec/gems/commander-4.6.0/lib/commander/runner.rb:444:in &apos;Commander::Runner#run_active_command&apos;&#10;/opt/homebrew/Cellar/fastlane/2.231.1/libexec/gems/fastlane-2.231.1/fastlane_core/lib/fastlane_core/ui/fastlane_runner.rb:124:in &apos;Commander::Runner#run!&apos;&#10;/opt/homebrew/Cellar/fastlane/2.231.1/libexec/gems/commander-4.6.0/lib/commander/delegates.rb:18:in &apos;Commander::Delegates#run!&apos;&#10;/opt/homebrew/Cellar/fastlane/2.231.1/libexec/gems/fastlane-2.231.1/fastlane/lib/fastlane/commands_generator.rb:363:in &apos;Fastlane::CommandsGenerator#run&apos;&#10;/opt/homebrew/Cellar/fastlane/2.231.1/libexec/gems/fastlane-2.231.1/fastlane/lib/fastlane/commands_generator.rb:43:in &apos;Fastlane::CommandsGenerator.start&apos;&#10;/opt/homebrew/Cellar/fastlane/2.231.1/libexec/gems/fastlane-2.231.1/fastlane/lib/fastlane/cli_tools_distributor.rb:132:in &apos;Fastlane::CLIToolsDistributor.take_off&apos;&#10;/opt/homebrew/Cellar/fastlane/2.231.1/libexec/gems/fastlane-2.231.1/bin/fastlane:23:in &apos;&lt;top (required)&gt;&apos;&#10;/opt/homebrew/Cellar/ruby/4.0.1/lib/ruby/4.0.0/rubygems.rb:303:in &apos;Kernel#load&apos;&#10;/opt/homebrew/Cellar/ruby/4.0.1/lib/ruby/4.0.0/rubygems.rb:303:in &apos;Gem.activate_and_load_bin_path&apos;&#10;/opt/homebrew/Cellar/fastlane/2.231.1/libexec/bin/fastlane:25:in &apos;&lt;main&gt;&apos;&#10;&#10;Invalid username and password combination. Used &apos;hey@dz0n.dev&apos; as the username." />
+      <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/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/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/app_provider.dart

@@ -1,6 +1,8 @@
 import 'dart:async';
+import 'dart:convert';
 import 'dart:math' as math;
 import 'package:flutter/foundation.dart';
+import 'package:meshcore_client/meshcore_client.dart' show BufferReader;
 import 'package:shared_preferences/shared_preferences.dart';
 import 'connection_provider.dart';
 import 'contacts_provider.dart';
@@ -17,6 +19,7 @@ import '../services/nearest_router_selector.dart';
 import '../services/packet_capture_storage_service.dart';
 import '../services/path_history_service.dart';
 import '../services/route_hash_preferences.dart';
+import '../services/notification_service.dart';
 import '../models/contact.dart';
 import '../models/message.dart';
 import '../models/ble_packet_log.dart';
@@ -56,9 +59,65 @@ class _DirectMessageRouteSession {
   }
 }
 
+class _ParsedRawAdvert {
+  final Uint8List publicKey;
+  final String? advName;
+  final int typeValue;
+  final int flags;
+  final int lastAdvert;
+  final int? advLat;
+  final int? advLon;
+  final int? signedEncodedPathLen;
+  final Uint8List? paddedPathBytes;
+
+  const _ParsedRawAdvert({
+    required this.publicKey,
+    required this.advName,
+    required this.typeValue,
+    required this.flags,
+    required this.lastAdvert,
+    required this.advLat,
+    required this.advLon,
+    required this.signedEncodedPathLen,
+    required this.paddedPathBytes,
+  });
+}
+
+class _ParsedRepeaterStatus {
+  final int batteryMv;
+  final int queueLen;
+  final int lastRssi;
+  final int lastSnrRaw;
+  final int uptimeSecs;
+
+  const _ParsedRepeaterStatus({
+    required this.batteryMv,
+    required this.queueLen,
+    required this.lastRssi,
+    required this.lastSnrRaw,
+    required this.uptimeSecs,
+  });
+}
+
+class _PendingRepeaterOwnerRequest {
+  final Uint8List publicKey;
+
+  const _PendingRepeaterOwnerRequest({required this.publicKey});
+}
+
 /// Main App Provider - coordinates all other providers
 class AppProvider with ChangeNotifier {
   static const int _maxDirectPayloadHops = 3;
+  static const int _rawPayloadTypeAdvert = 0x04;
+  static const int _routeTransportFlood = 0x00;
+  static const int _routeTransportDirect = 0x03;
+  static const int _anonReqTypeOwner = 0x02;
+  static const double _lowBatteryThresholdPercent = 30.0;
+  static const double _lowBatteryResetThresholdPercent = 35.0;
+  static const Duration _lowBatteryCheckInterval = Duration(minutes: 5);
+  static const Duration _repeaterOwnerInfoRequestCooldown = Duration(
+    minutes: 10,
+  );
   @visibleForTesting
   static bool isDeletedChannelInfo(
     int channelIdx,
@@ -88,6 +147,7 @@ class AppProvider with ChangeNotifier {
       LocationTrackingService();
   final PacketCaptureStorageService packetCaptureStorageService =
       PacketCaptureStorageService();
+  final NotificationService _notificationService = NotificationService();
 
   bool _isInitialized = false;
   bool get isInitialized => _isInitialized;
@@ -117,8 +177,6 @@ class AppProvider with ChangeNotifier {
   bool get isVoiceNoiseSuppressionEnabled => _isVoiceNoiseSuppressionEnabled;
   double _messageFontScale = 1.0;
   double get messageFontScale => _messageFontScale;
-  bool _autoAddDiscoveredContacts = false;
-  bool get autoAddDiscoveredContacts => _autoAddDiscoveredContacts;
   bool _autoRouteRotationEnabled =
       MessagingRoutePreferences.defaultAutoRouteRotationEnabled;
   bool get autoRouteRotationEnabled => _autoRouteRotationEnabled;
@@ -148,13 +206,19 @@ class AppProvider with ChangeNotifier {
   final Map<String, Future<bool>> _pendingMediaSwarmFetches = {};
   final Map<String, Map<String, MediaSwarmAvailability>>
   _pendingMediaSwarmResponses = {};
+  final Map<String, DateTime> _recentRepeaterStatusRequests = {};
+  final Map<String, DateTime> _recentRepeaterOwnerInfoRequests = {};
+  final Map<int, _PendingRepeaterOwnerRequest> _pendingRepeaterOwnerRequests =
+      {};
   bool _fastLocationScreenActive = false;
   Timer? _packetCaptureFlushTimer;
+  Timer? _lowBatteryCheckTimer;
   String? _lastPersistedPacketSignature;
   bool _isPersistingPacketCapture = false;
   bool _wasDeviceConnected = false;
   bool _hasCompletedConnectionBootstrap = false;
   bool _isReconnectSyncInProgress = false;
+  final Set<String> _lowBatteryNotifiedNodeIds = <String>{};
 
   AppProvider({
     required this.connectionProvider,
@@ -181,10 +245,10 @@ class AppProvider with ChangeNotifier {
     _loadVoiceEchoCancellationEnabled();
     _loadVoiceNoiseSuppressionEnabled();
     _loadMessageFontScale();
-    _loadAutoAddDiscoveredContacts();
     _loadMessagingRouteSettings();
     unawaited(_pathHistoryService.initialize());
     _startPacketCapturePersistence();
+    _startLowBatteryWatcher();
     _syncDrawingsOnStartup(); // Sync drawings immediately after providers load
     _isInitialized = true;
   }
@@ -197,6 +261,58 @@ class AppProvider with ChangeNotifier {
     unawaited(_flushPacketCaptureLogs());
   }
 
+  void _startLowBatteryWatcher() {
+    _lowBatteryCheckTimer?.cancel();
+    _lowBatteryCheckTimer = Timer.periodic(_lowBatteryCheckInterval, (_) {
+      unawaited(_checkLowBatteryAlerts());
+    });
+    unawaited(_checkLowBatteryAlerts());
+  }
+
+  Future<void> _checkLowBatteryAlerts() async {
+    final deviceBattery = connectionProvider.deviceInfo.batteryPercent;
+    if (deviceBattery != null &&
+        deviceBattery > _lowBatteryResetThresholdPercent) {
+      _lowBatteryNotifiedNodeIds.remove('device');
+    }
+
+    if (connectionProvider.deviceInfo.isConnected && deviceBattery != null) {
+      await _notifyLowBatteryIfNeeded(
+        nodeId: 'device',
+        nodeName:
+            connectionProvider.deviceInfo.selfName?.trim().isNotEmpty == true
+            ? connectionProvider.deviceInfo.selfName!.trim()
+            : (connectionProvider.deviceInfo.displayName ?? 'Connected device'),
+        batteryPercent: deviceBattery,
+        isCurrentDevice: true,
+      );
+    }
+  }
+
+  Future<void> _notifyLowBatteryIfNeeded({
+    required String nodeId,
+    required String nodeName,
+    required double batteryPercent,
+    required bool isCurrentDevice,
+  }) async {
+    if (batteryPercent >= _lowBatteryThresholdPercent) {
+      return;
+    }
+    if (_lowBatteryNotifiedNodeIds.contains(nodeId)) {
+      return;
+    }
+
+    final shown = await _notificationService.showLowBatteryNotification(
+      nodeId: nodeId,
+      nodeName: nodeName,
+      batteryPercent: batteryPercent,
+      isCurrentDevice: isCurrentDevice,
+    );
+    if (shown) {
+      _lowBatteryNotifiedNodeIds.add(nodeId);
+    }
+  }
+
   String _packetLogSignature(BlePacketLog log) {
     final prefix = log.rawData.length <= 12
         ? log.rawData
@@ -249,17 +365,15 @@ class AppProvider with ChangeNotifier {
 
   /// Sync drawings from messages on app startup (before BLE connection)
   Future<void> _syncDrawingsOnStartup() async {
-    // Wait for MessagesProvider to finish initializing
-    // DrawingProvider loads around the same time
+    // Wait for both MessagesProvider and DrawingProvider to finish initializing
     int attempts = 0;
-    while (!messagesProvider.isInitialized && attempts < 20) {
+    while ((!messagesProvider.isInitialized ||
+            !drawingProvider.isInitialized) &&
+        attempts < 40) {
       await Future.delayed(const Duration(milliseconds: 50));
       attempts++;
     }
 
-    // Give DrawingProvider a moment to finish loading too
-    await Future.delayed(const Duration(milliseconds: 100));
-
     _restoreSessionMetadataFromMessages();
 
     debugPrint(
@@ -652,30 +766,6 @@ class AppProvider with ChangeNotifier {
     }
   }
 
-  /// Load auto-add discovered contacts setting from shared preferences.
-  Future<void> _loadAutoAddDiscoveredContacts() async {
-    try {
-      final prefs = await SharedPreferences.getInstance();
-      _autoAddDiscoveredContacts =
-          prefs.getBool('auto_add_discovered_contacts') ?? false;
-      notifyListeners();
-    } catch (e) {
-      debugPrint('Error loading auto-add discovered contacts setting: $e');
-    }
-  }
-
-  /// Toggle auto-add discovered contacts on/off.
-  Future<void> toggleAutoAddDiscoveredContacts(bool enabled) async {
-    try {
-      _autoAddDiscoveredContacts = enabled;
-      final prefs = await SharedPreferences.getInstance();
-      await prefs.setBool('auto_add_discovered_contacts', enabled);
-      notifyListeners();
-    } catch (e) {
-      debugPrint('Error saving auto-add discovered contacts setting: $e');
-    }
-  }
-
   Future<void> _loadMessagingRouteSettings() async {
     try {
       _autoRouteRotationEnabled =
@@ -805,16 +895,49 @@ class AppProvider with ChangeNotifier {
           );
         };
     // When a contact is received from BLE
-    connectionProvider.onContactReceived = (contact) {
+    connectionProvider.onContactReceivedDetailed = (contact, source) {
+      final devicePublicKey = connectionProvider.deviceInfo.publicKey;
+      final existingContact = contactsProvider.findContactByKey(
+        contact.publicKey,
+      );
+      final isAdvertSource =
+          source == ContactReceiveSource.advert ||
+          source == ContactReceiveSource.preview;
+
+      if (isAdvertSource) {
+        final isNewPendingAdvert = contactsProvider
+            .addOrUpdatePendingAdvertContact(
+              contact,
+              devicePublicKey: devicePublicKey,
+            );
+        if (isNewPendingAdvert) {
+          unawaited(
+            _notificationService.showContactDiscoveredNotification(
+              contactKey: contact.publicKey
+                  .take(6)
+                  .map((b) => b.toRadixString(16).padLeft(2, '0'))
+                  .join(),
+              contactName: contact.advName.trim().isEmpty
+                  ? null
+                  : contact.advName,
+            ),
+          );
+        }
+        if (contact.type == ContactType.repeater &&
+            contact.advName.trim().isEmpty) {
+          unawaited(_maybeRequestRepeaterOwnerInfo(contact.publicKey));
+        }
+        if (existingContact == null) {
+          return;
+        }
+      }
+
       // Pass device public key to filter out our own contact
       contactsProvider.addOrUpdateContact(
         contact,
-        devicePublicKey: connectionProvider.deviceInfo.publicKey,
+        devicePublicKey: devicePublicKey,
       );
       unawaited(_pathHistoryService.recordLearnedPath(contact));
-
-      // Broadcast to SSE clients if server is running
-      connectionProvider.broadcastContactToSseClients(contact);
     };
 
     // When all contacts are received
@@ -828,11 +951,6 @@ class AppProvider with ChangeNotifier {
         unawaited(_pathHistoryService.recordLearnedPath(contact));
       }
       debugPrint('Received ${contacts.length} contacts');
-
-      // Broadcast all contacts to SSE clients if server is running
-      for (final contact in contacts) {
-        connectionProvider.broadcastContactToSseClients(contact);
-      }
     };
 
     // Setup callback for ConnectionProvider to query channel info
@@ -975,9 +1093,10 @@ class AppProvider with ChangeNotifier {
       if (AppProvider.shouldIgnoreSelfReplay(
         message: message,
         ownPublicKey: connectionProvider.deviceInfo.publicKey,
-        ownName:
-            connectionProvider.deviceInfo.deviceName ??
-            connectionProvider.deviceInfo.selfName,
+        ownName: _preferredSelfDisplayName(
+          deviceName: connectionProvider.deviceInfo.deviceName,
+          selfName: connectionProvider.deviceInfo.selfName,
+        ),
       )) {
         debugPrint('⏭️ [AppProvider] Ignoring self replay: ${message.id}');
         return;
@@ -1057,9 +1176,6 @@ class AppProvider with ChangeNotifier {
             contactLocationSnapshot: contactLocationSnapshot,
             receptionDetailsSnapshot: receptionDetailsSnapshot,
           );
-
-          // Broadcast drawing message to SSE clients if server is running
-          connectionProvider.broadcastMessageToSseClients(updatedMessage);
         } else {
           debugPrint('⚠️ [AppProvider] Failed to parse drawing message');
         }
@@ -1100,7 +1216,6 @@ class AppProvider with ChangeNotifier {
           contactLocationSnapshot: contactLocationSnapshot,
           receptionDetailsSnapshot: receptionDetailsSnapshot,
         );
-        connectionProvider.broadcastMessageToSseClients(enrichedMessage);
         return;
       }
 
@@ -1134,7 +1249,6 @@ class AppProvider with ChangeNotifier {
           contactLocationSnapshot: contactLocationSnapshot,
           receptionDetailsSnapshot: receptionDetailsSnapshot,
         );
-        connectionProvider.broadcastMessageToSseClients(enrichedMessage);
         return;
       }
 
@@ -1159,9 +1273,6 @@ class AppProvider with ChangeNotifier {
         contactLocationSnapshot: contactLocationSnapshot,
         receptionDetailsSnapshot: receptionDetailsSnapshot,
       );
-
-      // Broadcast message to SSE clients if server is running
-      connectionProvider.broadcastMessageToSseClients(enrichedMessage);
     };
 
     // Keep a compact receive-time snapshot because packet logs roll over.
@@ -1180,6 +1291,9 @@ class AppProvider with ChangeNotifier {
     // Used by newer firmware versions for telemetry and other binary data
     // BOTH callbacks (0x8B and 0x8C) must be handled for device compatibility
     connectionProvider.onBinaryResponse = (publicKeyPrefix, tag, responseData) {
+      if (_handlePendingRepeaterOwnerResponse(tag, responseData)) {
+        return;
+      }
       debugPrint(
         '📊 [AppProvider] Binary response (0x8C) received - updating contact telemetry',
       );
@@ -1193,6 +1307,46 @@ class AppProvider with ChangeNotifier {
     // Magic 0x69 'i' = image fetch request; 0x56 'V' = voice packet.
     // Magic 0x49 'I' = image packet.
     connectionProvider.onRawDataReceived = (payload, snrRaw, rssiDbm) {
+      final parsedAdvert = _tryParseRawAdvert(payload);
+      if (parsedAdvert != null) {
+        final isNewPendingAdvert = contactsProvider
+            .addOrUpdatePendingAdvertMetadata(
+              publicKey: parsedAdvert.publicKey,
+              typeValue: parsedAdvert.typeValue,
+              devicePublicKey: connectionProvider.deviceInfo.publicKey,
+              flags: parsedAdvert.flags,
+              advName: parsedAdvert.advName,
+              lastAdvert: parsedAdvert.lastAdvert,
+              advLat: parsedAdvert.advLat,
+              advLon: parsedAdvert.advLon,
+              signedEncodedPathLen: parsedAdvert.signedEncodedPathLen,
+              paddedPathBytes: parsedAdvert.paddedPathBytes,
+              rxRssiDbm: rssiDbm,
+              rxSnrRaw: snrRaw,
+            );
+        if (isNewPendingAdvert) {
+          final contactKey = parsedAdvert.publicKey
+              .map((b) => b.toRadixString(16).padLeft(2, '0'))
+              .join();
+          unawaited(
+            _notificationService.showContactDiscoveredNotification(
+              contactKey: contactKey,
+              contactName: parsedAdvert.advName,
+            ),
+          );
+        }
+        if (parsedAdvert.typeValue == ContactType.repeater.value) {
+          unawaited(_requestRepeaterStatus(parsedAdvert.publicKey));
+          unawaited(_maybeRequestRepeaterOwnerInfo(parsedAdvert.publicKey));
+        }
+        if (contactsProvider.shouldEnrichPendingAdvert(
+          parsedAdvert.publicKey,
+        )) {
+          unawaited(connectionProvider.previewContact(parsedAdvert.publicKey));
+        }
+        return;
+      }
+
       final fastGpsPacket = FastGpsPacket.tryParseBinary(payload);
       if (fastGpsPacket != null) {
         final sender = _resolveContactByPrefixHex(fastGpsPacket.senderKey6);
@@ -1398,6 +1552,31 @@ class AppProvider with ChangeNotifier {
       _handleIncomingVoicePacket(pkt, justComplete: justComplete);
     };
 
+    connectionProvider.onControlDataReceived =
+        (payload, snrRaw, rssiDbm, pathLen) {
+          _handleControlDataDiscovery(
+            payload: payload,
+            snrRaw: snrRaw,
+            rssiDbm: rssiDbm,
+            pathLen: pathLen,
+          );
+        };
+
+    connectionProvider.onStatusResponse = (publicKeyPrefix, statusData) {
+      final parsed = _tryParseRepeaterStatus(statusData);
+      if (parsed == null) {
+        return;
+      }
+      contactsProvider.updatePendingAdvertStatusByPrefix(
+        publicKeyPrefix,
+        batteryMv: parsed.batteryMv,
+        queueLen: parsed.queueLen,
+        lastRssi: parsed.lastRssi,
+        lastSnrRaw: parsed.lastSnrRaw,
+        uptimeSecs: parsed.uptimeSecs,
+      );
+    };
+
     // When a contact's routing path is updated in the mesh network
     connectionProvider.onPathUpdated = (publicKey) {
       debugPrint(
@@ -1434,22 +1613,30 @@ class AppProvider with ChangeNotifier {
           }
         });
       } else {
-        if (_autoAddDiscoveredContacts) {
-          debugPrint('   Unknown contact - auto-add enabled, fetching details');
-          Future.delayed(const Duration(milliseconds: 100), () {
-            if (connectionProvider.deviceInfo.isConnected) {
-              connectionProvider.getContact(publicKey);
-            }
-          });
-        } else {
-          contactsProvider.addPendingAdvert(
-            publicKey,
-            devicePublicKey: connectionProvider.deviceInfo.publicKey,
-          );
-          debugPrint(
-            '   Unknown contact - added to pending adverts list and waiting for details',
+        final isNewPendingAdvert = contactsProvider.addPendingAdvert(
+          publicKey,
+          devicePublicKey: connectionProvider.deviceInfo.publicKey,
+        );
+        debugPrint(
+          '   Unknown contact - added to pending adverts list and waiting for manual resolution',
+        );
+        if (isNewPendingAdvert) {
+          final keyHex = publicKey
+              .take(6)
+              .map((b) => b.toRadixString(16).padLeft(2, '0'))
+              .join();
+          unawaited(
+            _notificationService.showContactDiscoveredNotification(
+              contactKey: keyHex,
+              contactName: contactsProvider
+                  .pendingAdvertByKey(publicKey)
+                  ?.advName,
+            ),
           );
         }
+        if (contactsProvider.shouldEnrichPendingAdvert(publicKey)) {
+          unawaited(connectionProvider.previewContact(publicKey));
+        }
       }
     };
 
@@ -1861,6 +2048,312 @@ class AppProvider with ChangeNotifier {
     );
   }
 
+  Future<void> _requestRepeaterStatus(Uint8List publicKey) async {
+    if (!connectionProvider.deviceInfo.isConnected) {
+      return;
+    }
+    final keyHex = publicKey
+        .map((byte) => byte.toRadixString(16).padLeft(2, '0'))
+        .join();
+    final now = DateTime.now();
+    final lastRequestAt = _recentRepeaterStatusRequests[keyHex];
+    if (lastRequestAt != null &&
+        now.difference(lastRequestAt) < const Duration(minutes: 2)) {
+      return;
+    }
+    _recentRepeaterStatusRequests[keyHex] = now;
+    try {
+      await connectionProvider.requestStatus(publicKey);
+    } catch (_) {
+      // Ignore unsupported or unreachable repeaters.
+    }
+  }
+
+  Future<void> _maybeRequestRepeaterOwnerInfo(Uint8List publicKey) async {
+    final pendingAdvert = contactsProvider.pendingAdvertByKey(publicKey);
+    if (pendingAdvert == null ||
+        pendingAdvert.typeValue != ContactType.repeater.value ||
+        pendingAdvert.advName?.trim().isNotEmpty == true ||
+        !connectionProvider.deviceInfo.isConnected) {
+      return;
+    }
+
+    final keyHex = pendingAdvert.publicKeyHex;
+    final now = DateTime.now();
+    final lastRequestAt = _recentRepeaterOwnerInfoRequests[keyHex];
+    if (lastRequestAt != null &&
+        now.difference(lastRequestAt) < _repeaterOwnerInfoRequestCooldown) {
+      return;
+    }
+
+    Contact? existingContact;
+    for (final contact in contactsProvider.contacts) {
+      if (contact.publicKeyHex == keyHex) {
+        existingContact = contact;
+        break;
+      }
+    }
+
+    var temporaryContactAdded = false;
+    final requestContact =
+        existingContact ?? _temporaryRepeaterContactForOwnerInfo(pendingAdvert);
+    if (requestContact == null || !requestContact.routeHasPath) {
+      return;
+    }
+
+    _recentRepeaterOwnerInfoRequests[keyHex] = now;
+
+    if (existingContact == null) {
+      connectionProvider.clearError();
+      await connectionProvider.addOrUpdateContact(requestContact);
+      if (connectionProvider.error != null) {
+        return;
+      }
+      connectionProvider.clearError();
+      temporaryContactAdded = true;
+    }
+
+    try {
+      final ticket = await connectionProvider.sendAnonRequest(
+        contactPublicKey: publicKey,
+        requestData: _buildRepeaterOwnerRequest(requestContact),
+      );
+      if (ticket == null) {
+        return;
+      }
+      _pendingRepeaterOwnerRequests[ticket.tag] = _PendingRepeaterOwnerRequest(
+        publicKey: Uint8List.fromList(publicKey),
+      );
+      Future.delayed(
+        Duration(milliseconds: ticket.suggestedTimeoutMs + 1500),
+        () => _pendingRepeaterOwnerRequests.remove(ticket.tag),
+      );
+    } catch (_) {
+      // Ignore unsupported or unreachable repeaters.
+    } finally {
+      if (temporaryContactAdded) {
+        Future.delayed(const Duration(milliseconds: 250), () async {
+          await connectionProvider.removeContact(publicKey);
+          connectionProvider.clearError();
+        });
+      }
+    }
+  }
+
+  Contact? _temporaryRepeaterContactForOwnerInfo(PendingAdvert advert) {
+    final signedEncodedPathLen = advert.signedEncodedPathLen;
+    if (signedEncodedPathLen == null) {
+      return null;
+    }
+
+    final advName = advert.advName?.trim();
+    final lastAdvert =
+        advert.lastAdvert ?? (advert.receivedAt.millisecondsSinceEpoch ~/ 1000);
+    return Contact(
+      publicKey: Uint8List.fromList(advert.publicKey),
+      type: ContactType.repeater,
+      flags: advert.flags ?? 0,
+      outPathLen: signedEncodedPathLen,
+      outPath: advert.paddedPathBytes == null
+          ? Uint8List(ContactRouteCodec.maxPathBytes)
+          : Uint8List.fromList(advert.paddedPathBytes!),
+      advName: advName?.isNotEmpty == true ? advName! : advert.shortDisplayKey,
+      lastAdvert: lastAdvert,
+      advLat: advert.advLat ?? 0,
+      advLon: advert.advLon ?? 0,
+      lastMod: lastAdvert,
+    );
+  }
+
+  Uint8List _buildRepeaterOwnerRequest(Contact contact) {
+    final replyPathDescriptor = contact.routeEncodedPathLen;
+    final replyPathBytes = contact.routeHopCount > 0
+        ? Uint8List.fromList(
+            LogRxRouteDecoder.reverseHopBytes(
+              contact.routePathBytes,
+              hashSize: contact.routeHashSize,
+            ),
+          )
+        : Uint8List(0);
+    return Uint8List.fromList([
+      _anonReqTypeOwner,
+      replyPathDescriptor,
+      ...replyPathBytes,
+    ]);
+  }
+
+  bool _handlePendingRepeaterOwnerResponse(int tag, Uint8List responseData) {
+    final request = _pendingRepeaterOwnerRequests.remove(tag);
+    if (request == null) {
+      return false;
+    }
+
+    final ownerName = _tryParseRepeaterOwnerName(responseData);
+    if (ownerName == null || ownerName.isEmpty) {
+      return true;
+    }
+
+    final existing = contactsProvider.pendingAdvertByKey(request.publicKey);
+    contactsProvider.addOrUpdatePendingAdvertMetadata(
+      publicKey: request.publicKey,
+      typeValue: existing?.typeValue ?? ContactType.repeater.value,
+      devicePublicKey: connectionProvider.deviceInfo.publicKey,
+      advName: ownerName,
+    );
+    return true;
+  }
+
+  String? _tryParseRepeaterOwnerName(Uint8List responseData) {
+    if (responseData.length <= 4) {
+      return null;
+    }
+
+    try {
+      final payload = utf8
+          .decode(responseData.sublist(4), allowMalformed: true)
+          .trim();
+      if (payload.isEmpty) {
+        return null;
+      }
+      final firstLine = payload.split(RegExp(r'[\r\n]+')).first.trim();
+      return firstLine.isEmpty ? null : firstLine;
+    } catch (_) {
+      return null;
+    }
+  }
+
+  _ParsedRepeaterStatus? _tryParseRepeaterStatus(Uint8List statusData) {
+    if (statusData.length < 52) {
+      return null;
+    }
+
+    try {
+      final data = ByteData.sublistView(statusData);
+      var offset = 0;
+      final batteryMv = data.getUint16(offset, Endian.little);
+      offset += 2;
+      final queueLen = data.getUint16(offset, Endian.little);
+      offset += 2;
+      offset += 2; // noiseFloor
+      final lastRssi = data.getInt16(offset, Endian.little);
+      offset += 2;
+      offset += 4; // packetsRecv
+      offset += 4; // packetsSent
+      offset += 4; // txAirSecs
+      final uptimeSecs = data.getUint32(offset, Endian.little);
+      offset += 4;
+      offset += 4; // floodTx
+      offset += 4; // directTx
+      offset += 4; // floodRx
+      offset += 4; // directRx
+      offset += 2; // errEvents
+      final lastSnrRaw = data.getInt16(offset, Endian.little);
+
+      return _ParsedRepeaterStatus(
+        batteryMv: batteryMv,
+        queueLen: queueLen,
+        lastRssi: lastRssi,
+        lastSnrRaw: lastSnrRaw,
+        uptimeSecs: uptimeSecs,
+      );
+    } catch (_) {
+      return null;
+    }
+  }
+
+  _ParsedRawAdvert? _tryParseRawAdvert(Uint8List rawPayload) {
+    if (rawPayload.length < 103) {
+      return null;
+    }
+
+    try {
+      final reader = BufferReader(rawPayload);
+      final header = reader.readByte();
+      final routeType = header & 0x03;
+      final payloadType = (header >> 2) & 0x0F;
+      if (payloadType != _rawPayloadTypeAdvert) {
+        return null;
+      }
+
+      if (routeType == _routeTransportFlood ||
+          routeType == _routeTransportDirect) {
+        if (reader.remainingBytesCount < 4) {
+          return null;
+        }
+        reader.skip(4);
+      }
+
+      if (reader.remainingBytesCount < 1) {
+        return null;
+      }
+      final pathByteLen = reader.readByte();
+      if (reader.remainingBytesCount < pathByteLen + 101) {
+        return null;
+      }
+      final pathBytes = reader.readBytes(pathByteLen);
+      final publicKey = reader.readBytes(32);
+      final timestamp = reader.readInt32LE();
+      reader.skip(64);
+      final flags = reader.readByte();
+      final typeValue = flags & 0x0F;
+      final hasLocation = (flags & 0x10) != 0;
+      final hasName = (flags & 0x80) != 0;
+
+      int? advLat;
+      int? advLon;
+      if (hasLocation) {
+        if (reader.remainingBytesCount < 8) {
+          return null;
+        }
+        advLat = reader.readInt32LE();
+        advLon = reader.readInt32LE();
+      }
+
+      String? advName;
+      if (hasName && reader.remainingBytesCount > 0) {
+        final decodedName = utf8
+            .decode(reader.readRemainingBytes(), allowMalformed: true)
+            .trim();
+        if (decodedName.isNotEmpty) {
+          advName = decodedName;
+        }
+      }
+
+      int? signedEncodedPathLen;
+      Uint8List? paddedPathBytes;
+      if (pathBytes.isNotEmpty) {
+        final hashSize = LogRxRouteDecoder.inferHashSize(pathBytes);
+        final reversedPathBytes = LogRxRouteDecoder.reverseHopBytes(
+          pathBytes,
+          hashSize: hashSize,
+        );
+        final padded = Uint8List(ContactRouteCodec.maxPathBytes)
+          ..setRange(0, reversedPathBytes.length, reversedPathBytes);
+        final encodedPathLen =
+            ((hashSize - 1) << 6) |
+            ((reversedPathBytes.length ~/ hashSize) & 0x3F);
+        signedEncodedPathLen = ContactRouteCodec.toSignedDescriptor(
+          encodedPathLen,
+        );
+        paddedPathBytes = padded;
+      }
+
+      return _ParsedRawAdvert(
+        publicKey: publicKey,
+        advName: advName,
+        typeValue: typeValue,
+        flags: flags,
+        lastAdvert: timestamp,
+        advLat: advLat,
+        advLon: advLon,
+        signedEncodedPathLen: signedEncodedPathLen,
+        paddedPathBytes: paddedPathBytes,
+      );
+    } catch (_) {
+      return null;
+    }
+  }
+
   int _inferReceivedPathHashSize(
     List<int> pathBytes, {
     required int preferredHashSize,
@@ -1897,12 +2390,9 @@ class AppProvider with ChangeNotifier {
       // Get battery and storage information
       await connectionProvider.getBatteryAndStorage();
 
-      // Load contacts
+      // Load contacts (waits for device to finish sending all contacts)
       await connectionProvider.getContacts();
 
-      // Small delay to ensure contacts are fully loaded
-      await Future.delayed(const Duration(milliseconds: 500));
-
       // Sync all channels so slot assignment and channel state mirror the device.
       final channelsToSync = connectionProvider.deviceInfo.maxChannels;
       debugPrint(
@@ -3079,9 +3569,72 @@ class AppProvider with ChangeNotifier {
     _imageMissingRetryAttempts.clear();
     _voiceSessionSenderKey6.clear();
     _imageSessionSenderKey6.clear();
+    _lowBatteryNotifiedNodeIds.clear();
     notifyListeners();
   }
 
+  void _handleControlDataDiscovery({
+    required Uint8List payload,
+    required int snrRaw,
+    required int rssiDbm,
+    required int pathLen,
+  }) {
+    const int controlTypeMask = 0xF0;
+    const int controlTypeNodeDiscoverResp = 0x90;
+    const int minFullDiscoverResponseLength = 6 + 32;
+
+    if (payload.length < minFullDiscoverResponseLength) {
+      return;
+    }
+
+    final controlType = payload[0] & controlTypeMask;
+    if (controlType != controlTypeNodeDiscoverResp) {
+      return;
+    }
+
+    final nodeType = payload[0] & 0x0F;
+    final publicKey = Uint8List.fromList(payload.sublist(6, 38));
+    final isNewPendingAdvert = contactsProvider
+        .addOrUpdatePendingAdvertMetadata(
+          publicKey: publicKey,
+          typeValue: nodeType,
+          devicePublicKey: connectionProvider.deviceInfo.publicKey,
+          rxRssiDbm: rssiDbm,
+          rxSnrRaw: snrRaw,
+          signedEncodedPathLen: pathLen == 0 ? 0 : null,
+          paddedPathBytes: pathLen == 0
+              ? Uint8List(ContactRouteCodec.maxPathBytes)
+              : null,
+        );
+
+    debugPrint(
+      '🛰️ [AppProvider] Control discovery response: type=$nodeType '
+      'pathLen=$pathLen snr=$snrRaw rssi=$rssiDbm new=$isNewPendingAdvert',
+    );
+
+    if (isNewPendingAdvert) {
+      final keyHex = publicKey
+          .take(6)
+          .map((b) => b.toRadixString(16).padLeft(2, '0'))
+          .join();
+      unawaited(
+        _notificationService.showContactDiscoveredNotification(
+          contactKey: keyHex,
+          contactName: contactsProvider.pendingAdvertByKey(publicKey)?.advName,
+        ),
+      );
+    }
+
+    if (nodeType == ContactType.repeater.value) {
+      unawaited(_requestRepeaterStatus(publicKey));
+      unawaited(_maybeRequestRepeaterOwnerInfo(publicKey));
+    }
+
+    if (contactsProvider.shouldEnrichPendingAdvert(publicKey)) {
+      unawaited(connectionProvider.previewContact(publicKey));
+    }
+  }
+
   /// Get app statistics
   Map<String, dynamic> get statistics {
     return {
@@ -3099,6 +3652,7 @@ class AppProvider with ChangeNotifier {
   @override
   void dispose() {
     _packetCaptureFlushTimer?.cancel();
+    _lowBatteryCheckTimer?.cancel();
     unawaited(_flushPacketCaptureLogs());
     // Remove connection state listener
     connectionProvider.removeListener(_handleConnectionStateChange);

lib/providers/connection_provider.dart

@@ -1,5 +1,7 @@
 import 'dart:async';
 import 'dart:convert';
+import 'dart:math';
+import 'dart:typed_data';
 import 'package:flutter/foundation.dart';
 import 'package:flutter/scheduler.dart';
 import 'package:flutter_blue_plus/flutter_blue_plus.dart';
@@ -7,9 +9,7 @@ import 'package:crypto/crypto.dart';
 import '../models/contact.dart';
 import '../models/device_info.dart';
 import '../models/room_login_state.dart';
-import '../models/sse_server_config.dart';
 import 'package:meshcore_client/meshcore_client.dart' hide Contact;
-import '../services/sse_server_service.dart';
 import '../utils/sar_message_parser.dart';
 import 'helpers/room_login_manager.dart';
 import 'helpers/message_delivery_tracker.dart';
@@ -55,10 +55,22 @@ class ScannedDevice {
   ScannedDevice({required this.device, required this.rssi});
 }
 
+enum ContactReceiveSource { sync, requestedSingle, preview, advert }
+
+class _PendingContactRequest {
+  final ContactReceiveSource source;
+  final DateTime requestedAt;
+
+  const _PendingContactRequest({
+    required this.source,
+    required this.requestedAt,
+  });
+}
+
 /// Connection Provider - manages MeshCore device connection (BLE or TCP/WiFi)
 class ConnectionProvider with ChangeNotifier {
+  static const int _controlTypeNodeDiscoverReq = 0x80;
   final MeshCoreBleService _bleService = MeshCoreBleService();
-  final SseServerService _sseServer = SseServerService();
   MeshCoreTcpService? _tcpService;
 
   /// Expose BLE service for background location tracking
@@ -74,10 +86,6 @@ class ConnectionProvider with ChangeNotifier {
   ConnectionMode _connectionMode = ConnectionMode.ble;
   ConnectionMode get connectionMode => _connectionMode;
 
-  /// SSE server configuration
-  SseServerConfig _sseServerConfig = const SseServerConfig();
-  SseServerConfig get sseServerConfig => _sseServerConfig;
-
   /// TCP host last connected to (for display / reconnection info)
   String? _tcpHost;
   String? get tcpHost => _tcpHost;
@@ -130,6 +138,9 @@ class ConnectionProvider with ChangeNotifier {
   // Completer to wait for response before sending next sync request
   Completer<bool>? _syncResponseCompleter;
 
+  // Completer to wait for contacts sync to finish
+  Completer<void>? _contactsSyncCompleter;
+
   // Lightweight guards for other commands that can be double-tapped
   bool _isLoginInProgress = false;
   DateTime? _lastLoginRequestedAt;
@@ -142,6 +153,13 @@ class ConnectionProvider with ChangeNotifier {
   bool _isAdvertInProgress = false;
   DateTime? _lastAdvertRequestedAt;
   static const Duration _minAdvertInterval = Duration(milliseconds: 500);
+  bool _isContactsSyncInProgress = false;
+  final Map<String, _PendingContactRequest> _pendingSingleContactRequests = {};
+  final Map<String, DateTime> _previewContactMisses = {};
+  static const Duration _singleContactRequestWindow = Duration(seconds: 10);
+  static const Duration _previewContactMissTtl = Duration(minutes: 10);
+  bool _suppressNextPreviewNotFoundError = false;
+  bool? _supportsAutoaddConfig;
 
   // Helper instances
   final RoomLoginManager _roomLoginManager = RoomLoginManager();
@@ -159,6 +177,7 @@ class ConnectionProvider with ChangeNotifier {
 
   // Callbacks for other providers
   Function(Contact)? onContactReceived;
+  Function(Contact, ContactReceiveSource)? onContactReceivedDetailed;
   Function(List<Contact>)? onContactsComplete;
   Function(Message)? onMessageReceived;
   Function(Uint8List publicKey, Uint8List lppData)? onTelemetryReceived;
@@ -186,6 +205,8 @@ class ConnectionProvider with ChangeNotifier {
   onMessageEchoDetected;
   Function(Uint8List publicKeyPrefix, Uint8List statusData)? onStatusResponse;
   Function(Uint8List payload, int snrRaw, int rssiDbm)? onRawDataReceived;
+  Function(Uint8List payload, int snrRaw, int rssiDbm, int pathLen)?
+  onControlDataReceived;
   Contact? Function(Uint8List contactPublicKey)? resolveContactForDmCallback;
   bool Function()? canStartAutomaticMessageSyncCallback;
 
@@ -238,6 +259,10 @@ class ConnectionProvider with ChangeNotifier {
     };
 
     service.onError = (error, {int? errorCode}) {
+      if (errorCode == 2 && _suppressNextPreviewNotFoundError) {
+        _suppressNextPreviewNotFoundError = false;
+        return;
+      }
       debugPrint('⚠️ [Provider] Error received: $error');
       _error = error;
       if (_deviceInfo.connectionState != ConnectionState.connected) {
@@ -249,9 +274,21 @@ class ConnectionProvider with ChangeNotifier {
     };
 
     service.onContactNotFound = (contactPublicKey) async {
-      debugPrint('🔧 [Provider] Contact not found - initiating auto-recovery');
       if (contactPublicKey == null) return;
 
+      final keyHex = _publicKeyToHex(contactPublicKey);
+      final request = _pendingSingleContactRequests.remove(keyHex);
+      if (request?.source == ContactReceiveSource.preview) {
+        _previewContactMisses[keyHex] = DateTime.now();
+        _suppressNextPreviewNotFoundError = true;
+        debugPrint(
+          '🔧 [Provider] Preview contact not found, suppressing retries for $keyHex',
+        );
+        return;
+      }
+
+      debugPrint('🔧 [Provider] Contact not found - initiating auto-recovery');
+
       final operationId = contactPublicKey
           .sublist(0, 6)
           .map((b) => b.toRadixString(16).padLeft(2, '0'))
@@ -261,7 +298,6 @@ class ConnectionProvider with ChangeNotifier {
 
       try {
         await _activeService.addOrUpdateContact(pendingOp.contact!);
-        await Future.delayed(const Duration(milliseconds: 300));
 
         if (pendingOp.messageId != null) {
           _messageDeliveryTracker.trackPendingDirectMessage(
@@ -286,11 +322,18 @@ class ConnectionProvider with ChangeNotifier {
 
     service.onContactReceived = (contact) {
       debugPrint('📥 [Provider] Contact received: "${contact.advName}"');
+      final source = _classifyContactReceiveSource(contact.publicKey);
+      onContactReceivedDetailed?.call(contact, source);
       onContactReceived?.call(contact);
     };
 
     service.onContactsComplete = (contacts) {
       debugPrint('📥 [Provider] Contacts sync complete: ${contacts.length}');
+      _isContactsSyncInProgress = false;
+      if (_contactsSyncCompleter != null &&
+          !_contactsSyncCompleter!.isCompleted) {
+        _contactsSyncCompleter!.complete();
+      }
       onContactsComplete?.call(contacts);
     };
 
@@ -402,6 +445,8 @@ class ConnectionProvider with ChangeNotifier {
 
     service.onRawDataReceived = (payload, snrRaw, rssiDbm) =>
         onRawDataReceived?.call(payload, snrRaw, rssiDbm);
+    service.onControlDataReceived = (payload, snrRaw, rssiDbm, pathLen) =>
+        onControlDataReceived?.call(payload, snrRaw, rssiDbm, pathLen);
 
     service.onDeviceInfoReceived = (deviceInfo) {
       debugPrint('📥 [Provider] DeviceInfo received');
@@ -419,11 +464,6 @@ class ConnectionProvider with ChangeNotifier {
         spectrumScanMaxKhz: deviceInfo['spectrumScanMaxKhz'] as int?,
       );
       notifyListeners();
-      if (_sseServer.isRunning) {
-        _sseServer.setDeviceName(
-          _deviceInfo.deviceName ?? _deviceInfo.selfName,
-        );
-      }
     };
 
     service.onSelfInfoReceived = (selfInfo) {
@@ -443,11 +483,6 @@ class ConnectionProvider with ChangeNotifier {
         selfName: selfInfo['selfName'] as String?,
       );
       notifyListeners();
-      if (_sseServer.isRunning) {
-        _sseServer.setDeviceName(
-          _deviceInfo.deviceName ?? _deviceInfo.selfName,
-        );
-      }
     };
 
     service.onBatteryAndStorage = (millivolts, usedKb, totalKb) {
@@ -475,6 +510,17 @@ class ConnectionProvider with ChangeNotifier {
       notifyListeners();
     };
 
+    service.onAutoaddConfigReceived = (config) {
+      _deviceInfo = _deviceInfo.copyWith(
+        autoAddUsers: config['autoAddUsers'] as bool?,
+        autoAddRepeaters: config['autoAddRepeaters'] as bool?,
+        autoAddRoomServers: config['autoAddRoomServers'] as bool?,
+        autoAddSensors: config['autoAddSensors'] as bool?,
+        autoAddOverwriteOldest: config['autoAddOverwriteOldest'] as bool?,
+      );
+      notifyListeners();
+    };
+
     service.onTxActivity = () {
       _txActivity = true;
       notifyListeners();
@@ -583,6 +629,9 @@ class ConnectionProvider with ChangeNotifier {
       await stopScan();
     }
 
+    // Ensure we route commands to BLE, not a stale TCP service.
+    _connectionMode = ConnectionMode.ble;
+
     _deviceInfo = _deviceInfo.copyWith(
       deviceId: device.remoteId.toString(),
       deviceName: device.platformName.isNotEmpty
@@ -591,6 +640,8 @@ class ConnectionProvider with ChangeNotifier {
       connectionState: ConnectionState.connecting,
     );
     _error = null;
+    _supportsAutoaddConfig = null;
+    _resetSyncState();
     debugPrint('✅ [Provider] Device info updated to connecting state');
     notifyListeners();
 
@@ -620,6 +671,7 @@ class ConnectionProvider with ChangeNotifier {
       connectionState: ConnectionState.connecting,
     );
     _error = null;
+    _supportsAutoaddConfig = null;
     notifyListeners();
 
     // Create fresh TCP service and wire its callbacks
@@ -648,6 +700,8 @@ class ConnectionProvider with ChangeNotifier {
     }
     _tcpHost = null;
     _connectionMode = ConnectionMode.ble;
+    _supportsAutoaddConfig = null;
+    _resetSyncState();
     _deviceInfo = DeviceInfo(connectionState: ConnectionState.disconnected);
     _roomLoginManager.clearRoomLoginStates();
     _pingTracker.clearAll();
@@ -670,6 +724,8 @@ class ConnectionProvider with ChangeNotifier {
 
     await _bleService.disconnect();
 
+    _supportsAutoaddConfig = null;
+    _resetSyncState();
     _deviceInfo = DeviceInfo(connectionState: ConnectionState.disconnected);
     _roomLoginManager.clearRoomLoginStates();
     _pingTracker.clearAll();
@@ -678,6 +734,24 @@ class ConnectionProvider with ChangeNotifier {
     notifyListeners();
   }
 
+  /// Reset message sync state so the next connect/reconnect can sync cleanly.
+  void _resetSyncState() {
+    if (_syncResponseCompleter != null &&
+        !_syncResponseCompleter!.isCompleted) {
+      _syncResponseCompleter!.complete(false);
+    }
+    _syncResponseCompleter = null;
+    if (_contactsSyncCompleter != null &&
+        !_contactsSyncCompleter!.isCompleted) {
+      _contactsSyncCompleter!.complete();
+    }
+    _contactsSyncCompleter = null;
+    _isSyncingMessages = false;
+    _syncRequestedWhileBusy = false;
+    _noMoreMessages = false;
+    _pendingAutomaticMessageSync = false;
+  }
+
   /// Cancel ongoing reconnection attempts
   /// This is useful when the user wants to manually disconnect during reconnection
   void cancelReconnection() {
@@ -719,7 +793,10 @@ class ConnectionProvider with ChangeNotifier {
     return _messageDeliveryTracker.getDiagnostics();
   }
 
-  /// Get contacts from device
+  /// Get contacts from device.
+  ///
+  /// Waits for the device to finish sending all contacts (up to 5 s timeout)
+  /// so callers don't need an arbitrary delay.
   Future<void> getContacts() async {
     if (!_activeService.isConnected) {
       _error = 'Not connected to device';
@@ -728,10 +805,24 @@ class ConnectionProvider with ChangeNotifier {
     }
 
     try {
+      _isContactsSyncInProgress = true;
+      _contactsSyncCompleter = Completer<void>();
       await _activeService.getContacts();
+      await _contactsSyncCompleter!.future.timeout(
+        const Duration(seconds: 5),
+        onTimeout: () {
+          debugPrint(
+            '⚠️ [Provider] Contacts sync timeout - proceeding without full list',
+          );
+        },
+      );
     } catch (e) {
+      _isContactsSyncInProgress = false;
       _error = 'Failed to get contacts: $e';
       notifyListeners();
+    } finally {
+      _isContactsSyncInProgress = false;
+      _contactsSyncCompleter = null;
     }
   }
 
@@ -749,18 +840,99 @@ class ConnectionProvider with ChangeNotifier {
     }
 
     try {
+      _error = null;
+      _markSingleContactRequested(
+        publicKey,
+        source: ContactReceiveSource.requestedSingle,
+      );
       await _activeService.getContactByKey(publicKey);
     } catch (e) {
+      final errorText = e.toString();
+      if (_error == 'Not found' || errorText.contains('Not found')) {
+        _error = 'Not found';
+        notifyListeners();
+        return;
+      }
       _error = 'Failed to get contact: $e';
       debugPrint(
         '⚠️ [Provider] Failed to get contact by key, falling back to full contact sync',
       );
       // Fallback to full contact sync if command not supported
+      _isContactsSyncInProgress = true;
       await _activeService.getContacts();
       notifyListeners();
     }
   }
 
+  Future<void> previewContact(Uint8List publicKey) async {
+    if (!_activeService.isConnected) {
+      return;
+    }
+    _prunePreviewContactMisses();
+    final keyHex = _publicKeyToHex(publicKey);
+    if (_previewContactMisses.containsKey(keyHex)) {
+      return;
+    }
+
+    try {
+      _markSingleContactRequested(
+        publicKey,
+        source: ContactReceiveSource.preview,
+      );
+      await _activeService.getContactByKey(publicKey);
+    } catch (e) {
+      debugPrint(
+        '⚠️ [Provider] Preview contact fetch failed for ${_publicKeyToHex(publicKey)}: $e',
+      );
+    }
+  }
+
+  ContactReceiveSource _classifyContactReceiveSource(Uint8List publicKey) {
+    _prunePendingSingleContactRequests();
+    final keyHex = _publicKeyToHex(publicKey);
+    if (_isContactsSyncInProgress) {
+      return ContactReceiveSource.sync;
+    }
+    final request = _pendingSingleContactRequests.remove(keyHex);
+    if (request != null &&
+        DateTime.now().difference(request.requestedAt) <=
+            _singleContactRequestWindow) {
+      return request.source;
+    }
+    return ContactReceiveSource.advert;
+  }
+
+  void _markSingleContactRequested(
+    Uint8List publicKey, {
+    required ContactReceiveSource source,
+  }) {
+    _prunePendingSingleContactRequests();
+    _pendingSingleContactRequests[_publicKeyToHex(publicKey)] =
+        _PendingContactRequest(source: source, requestedAt: DateTime.now());
+  }
+
+  void _prunePendingSingleContactRequests() {
+    if (_pendingSingleContactRequests.isEmpty) {
+      return;
+    }
+
+    final now = DateTime.now();
+    _pendingSingleContactRequests.removeWhere(
+      (_, request) =>
+          now.difference(request.requestedAt) > _singleContactRequestWindow,
+    );
+  }
+
+  void _prunePreviewContactMisses() {
+    if (_previewContactMisses.isEmpty) {
+      return;
+    }
+    final now = DateTime.now();
+    _previewContactMisses.removeWhere(
+      (_, timestamp) => now.difference(timestamp) > _previewContactMissTtl,
+    );
+  }
+
   /// Sync all channels from device
   Future<void> syncChannels({int? maxChannels}) async {
     if (!_activeService.isConnected) {
@@ -890,9 +1062,8 @@ class ConnectionProvider with ChangeNotifier {
         }
       }
 
-      // If not cached, query the device
+      // If not cached, query the device (awaits the BLE response)
       await _activeService.getChannel(channelIdx);
-      await Future.delayed(const Duration(milliseconds: 100));
 
       // Check again after query
       if (getChannelInfo != null) {
@@ -1086,6 +1257,10 @@ class ConnectionProvider with ChangeNotifier {
         channelName: channelName,
         secret: secretBytes,
       );
+
+      // Reconcile local state from the device after the write completes,
+      // matching the delete flow so channel/contact lists refresh immediately.
+      await _activeService.getChannel(slotIdx);
     } catch (e) {
       if (_isChannelRefreshTimeoutError(e)) {
         debugPrint(
@@ -1137,11 +1312,9 @@ class ConnectionProvider with ChangeNotifier {
       // behavior, then reconcile with an on-device refresh below.
       onChannelInfoReceived?.call(channelIdx, '', Uint8List(16), null);
 
-      // Small delay to allow the response to propagate
-      await Future.delayed(const Duration(milliseconds: 100));
-
-      // Refresh channels to update UI
-      // The empty channel will trigger removal via onChannelInfoReceived callback
+      // Refresh channel from device to reconcile UI state.
+      // BLE commands are processed in order by firmware, so the
+      // getChannel response reflects the completed deletion.
       await _activeService.getChannel(channelIdx);
     } catch (e) {
       _pendingDeletedChannelIndices.remove(channelIdx);
@@ -1181,6 +1354,7 @@ class ConnectionProvider with ChangeNotifier {
     }
 
     try {
+      _error = null;
       await _activeService.addOrUpdateContact(contact);
     } catch (e) {
       _error = 'Failed to add/update contact: $e';
@@ -1188,6 +1362,22 @@ class ConnectionProvider with ChangeNotifier {
     }
   }
 
+  Future<void> importContactAdvert(Uint8List contactAdvertFrame) async {
+    if (!_activeService.isConnected) {
+      _error = 'Not connected to device';
+      notifyListeners();
+      return;
+    }
+
+    try {
+      _error = null;
+      await _activeService.importContact(contactAdvertFrame);
+    } catch (e) {
+      _error = 'Failed to import contact: $e';
+      notifyListeners();
+    }
+  }
+
   /// Send text message to contact
   ///
   /// Returns true if the message was successfully sent to the BLE service.
@@ -1230,12 +1420,11 @@ class ConnectionProvider with ChangeNotifier {
         '⚠️ [ConnectionProvider] Rate limit hit: $pendingCount pending ACKs (max 7)',
       );
       debugPrint(
-        '⚠️ Firmware only tracks 8 ACKs - waiting for delivery confirmations...',
+        '⚠️ Firmware only tracks 8 ACKs - waiting for delivery confirmation...',
       );
 
-      // Wait briefly for some ACKs to arrive, then proceed anyway
-      // (User action shouldn't be blocked forever)
-      await Future.delayed(const Duration(milliseconds: 500));
+      // Wait for a slot to free up (delivery/timeout), max 500ms
+      await _messageDeliveryTracker.waitForSlot();
 
       if (_messageDeliveryTracker.shouldRateLimit) {
         debugPrint(
@@ -1311,30 +1500,14 @@ class ConnectionProvider with ChangeNotifier {
         attempt: retryAttempt,
       );
 
-      if (messageId != null) {
-        Future.delayed(const Duration(milliseconds: 350), () {
-          if (_messageDeliveryTracker.hasAckForMessage(messageId)) {
-            return;
-          }
-
-          debugPrint(
-            'ℹ️ [ConnectionProvider] Missing RESP_CODE_SENT for $messageId; promoting to sent via fallback',
-          );
-          onMessageSent?.call(messageId, 0, 0);
-        });
-      }
-
-      // Clear pending operation after successful send (no error)
-      // If ERR_CODE_NOT_FOUND occurs, the operation will be recovered automatically
+      // Clear pending operation — any ERR_CODE_NOT_FOUND has already been
+      // handled synchronously by onContactNotFound before sendTextMessage returns.
       if (effectiveContact != null) {
         final operationId = contactPublicKey
             .sublist(0, 6)
             .map((b) => b.toRadixString(16).padLeft(2, '0'))
             .join(':');
-        // Use a small delay to allow error response to arrive before clearing
-        Future.delayed(const Duration(milliseconds: 500), () {
-          _pendingSendOperations.remove(operationId);
-        });
+        _pendingSendOperations.remove(operationId);
       }
 
       return true;
@@ -1394,10 +1567,6 @@ class ConnectionProvider with ChangeNotifier {
         );
         debugPrint('  trackSentChannelMessage completed');
 
-        // Small delay to ensure the message is in the MessagesProvider list
-        // before we try to mark it as sent
-        await Future.delayed(const Duration(milliseconds: 50));
-
         // Use a dummy ACK tag (0) and timeout (0) for channel messages
         // This will trigger the callback to mark the message as "sent"
         debugPrint('  Calling onMessageSent callback...');
@@ -1636,6 +1805,40 @@ class ConnectionProvider with ChangeNotifier {
     }
   }
 
+  Future<void> discoverNodeType({
+    required int advertType,
+    bool prefixOnly = false,
+    int since = 0,
+  }) async {
+    if (!_activeService.isConnected) {
+      _error = 'Not connected to device';
+      notifyListeners();
+      return;
+    }
+
+    final random = Random.secure();
+    final tagBytes = Uint8List.fromList(
+      List<int>.generate(4, (_) => random.nextInt(256)),
+    );
+    final payload = BytesBuilder(copy: false)
+      ..addByte(_controlTypeNodeDiscoverReq | (prefixOnly ? 0x01 : 0x00))
+      ..addByte(1 << advertType)
+      ..add(tagBytes)
+      ..add([
+        since & 0xFF,
+        (since >> 8) & 0xFF,
+        (since >> 16) & 0xFF,
+        (since >> 24) & 0xFF,
+      ]);
+
+    try {
+      await _activeService.sendControlData(payload.toBytes());
+    } catch (e) {
+      _error = 'Failed to send node discovery request: $e';
+      notifyListeners();
+    }
+  }
+
   /// Get device time from companion radio to detect clock drift
   Future<void> getDeviceTime() async {
     if (!_activeService.isConnected) {
@@ -1866,12 +2069,96 @@ class ConnectionProvider with ChangeNotifier {
         advertLocationPolicy: advertLocationPolicy,
         multiAcks: multiAcks,
       );
+      _deviceInfo = _deviceInfo.copyWith(
+        telemetryModes: telemetryModes,
+        advertLocPolicy: advertLocationPolicy,
+        multiAcks: multiAcks,
+      );
+      notifyListeners();
     } catch (e) {
       _error = 'Failed to set other params: $e';
       notifyListeners();
     }
   }
 
+  Future<void> getAutoaddConfig() async {
+    if (_supportsAutoaddConfig == false) {
+      return;
+    }
+    if (!_activeService.isConnected) {
+      _error = 'Not connected to device';
+      notifyListeners();
+      return;
+    }
+
+    try {
+      final config = await _activeService.getAutoaddConfig();
+      _supportsAutoaddConfig = true;
+      _deviceInfo = _deviceInfo.copyWith(
+        autoAddUsers: config['autoAddUsers'] as bool?,
+        autoAddRepeaters: config['autoAddRepeaters'] as bool?,
+        autoAddRoomServers: config['autoAddRoomServers'] as bool?,
+        autoAddSensors: config['autoAddSensors'] as bool?,
+        autoAddOverwriteOldest: config['autoAddOverwriteOldest'] as bool?,
+      );
+      notifyListeners();
+    } catch (e) {
+      if (_isUnsupportedAutoaddConfigError(e)) {
+        _supportsAutoaddConfig = false;
+        _deviceInfo = _deviceInfo.copyWith(
+          autoAddUsers: null,
+          autoAddRepeaters: null,
+          autoAddRoomServers: null,
+          autoAddSensors: null,
+          autoAddOverwriteOldest: null,
+        );
+        notifyListeners();
+        return;
+      }
+      if (_isTransientAutoaddConfigError(e)) {
+        debugPrint('Ignoring transient auto-add config error: $e');
+        return;
+      }
+      _error = 'Failed to get auto-add config: $e';
+      notifyListeners();
+    }
+  }
+
+  Future<void> setAutoaddConfig({
+    required bool autoAddUsers,
+    required bool autoAddRepeaters,
+    required bool autoAddRoomServers,
+    required bool autoAddSensors,
+    required bool overwriteOldest,
+  }) async {
+    if (!_activeService.isConnected) {
+      _error = 'Not connected to device';
+      notifyListeners();
+      return;
+    }
+
+    try {
+      await _activeService.setAutoaddConfig(
+        autoAddUsers: autoAddUsers,
+        autoAddRepeaters: autoAddRepeaters,
+        autoAddRoomServers: autoAddRoomServers,
+        autoAddSensors: autoAddSensors,
+        overwriteOldest: overwriteOldest,
+      );
+      _deviceInfo = _deviceInfo.copyWith(
+        autoAddUsers: autoAddUsers,
+        autoAddRepeaters: autoAddRepeaters,
+        autoAddRoomServers: autoAddRoomServers,
+        autoAddSensors: autoAddSensors,
+        autoAddOverwriteOldest: overwriteOldest,
+      );
+      notifyListeners();
+    } catch (e) {
+      _error = 'Failed to set auto-add config: $e';
+      notifyListeners();
+    }
+  }
+
   /// Request fresh device info (triggers SelfInfo response)
   Future<void> refreshDeviceInfo() async {
     if (_isSpectrumScanActive) return;
@@ -1884,14 +2171,31 @@ class ConnectionProvider with ChangeNotifier {
     try {
       // The device query command triggers a SelfInfo response
       await _activeService.refreshDeviceInfo();
-      // Also request allowed repeat frequencies (firmware v9+, no-op on older firmware)
-      await _activeService.getAllowedRepeatFreq();
+      if (_supportsAutoaddConfig != false) {
+        unawaited(getAutoaddConfig());
+      }
+      try {
+        await _activeService.getAllowedRepeatFreq();
+      } catch (_) {
+        // Older firmware may not expose repeat frequency ranges.
+      }
     } catch (e) {
       _error = 'Failed to refresh device info: $e';
       notifyListeners();
     }
   }
 
+  bool _isUnsupportedAutoaddConfigError(Object error) {
+    final message = error.toString().toLowerCase();
+    return message.contains('unsupported command') ||
+        message.contains('unsupported');
+  }
+
+  bool _isTransientAutoaddConfigError(Object error) {
+    final message = error.toString().toLowerCase();
+    return message.contains('illegal argument');
+  }
+
   /// Request battery and storage information
   ///
   /// Queries the companion radio for:
@@ -2175,6 +2479,28 @@ class ConnectionProvider with ChangeNotifier {
     }
   }
 
+  Future<({int tag, int suggestedTimeoutMs})?> sendAnonRequest({
+    required Uint8List contactPublicKey,
+    required Uint8List requestData,
+  }) async {
+    if (!_activeService.isConnected) {
+      _error = 'Not connected to device';
+      notifyListeners();
+      return null;
+    }
+
+    try {
+      return await _activeService.sendAnonRequest(
+        contactPublicKey: contactPublicKey,
+        requestData: requestData,
+      );
+    } catch (e) {
+      _error = 'Failed to send anonymous request: $e';
+      notifyListeners();
+      return null;
+    }
+  }
+
   /// Reset routing path for a contact
   ///
   /// Clears the learned path to a contact, forcing the next message to use
@@ -2235,7 +2561,7 @@ class ConnectionProvider with ChangeNotifier {
     if (!_activeService.isConnected) {
       _error = 'Not connected to device';
       notifyListeners();
-      return;
+      throw Exception(_error);
     }
 
     try {
@@ -2243,6 +2569,7 @@ class ConnectionProvider with ChangeNotifier {
     } catch (e) {
       _error = 'Failed to remove contact: $e';
       notifyListeners();
+      rethrow;
     }
   }
 
@@ -2262,117 +2589,13 @@ class ConnectionProvider with ChangeNotifier {
     return _roomLoginManager.isLoggedIntoRoom(publicKeyPrefix);
   }
 
-  // ============================================================================
-  // SSE Server Methods
-  // ============================================================================
-
-  /// Start SSE server to share BLE device with multiple clients
-  Future<void> startSseServer(SseServerConfig config) async {
-    if (_sseServer.isRunning) {
-      debugPrint('⚠️ [ConnectionProvider] SSE server already running');
-      return;
-    }
-
-    try {
-      debugPrint('🚀 [ConnectionProvider] Starting SSE server...');
-      _sseServerConfig = config;
-
-      // Wire up callbacks
-      _sseServer.onSendMessage = (recipientPublicKey, text) async {
-        // Convert hex string to Uint8List
-        final bytes = <int>[];
-        for (int i = 0; i < recipientPublicKey.length; i += 2) {
-          bytes.add(
-            int.parse(recipientPublicKey.substring(i, i + 2), radix: 16),
-          );
-        }
-        return await sendTextMessage(
-          contactPublicKey: Uint8List.fromList(bytes),
-          text: text,
-        );
-      };
-
-      _sseServer.onSendChannelMessage = (channelIdx, text) async {
-        await sendChannelMessage(channelIdx: channelIdx, text: text);
-      };
-
-      _sseServer.onSyncContacts = () async {
-        await getContacts();
-      };
-
-      await _sseServer.startServer(config);
-
-      // Set initial device name
-      _sseServer.setDeviceName(_deviceInfo.deviceName ?? _deviceInfo.selfName);
-
-      _connectionMode = ConnectionMode.sseServer;
-      notifyListeners();
-
-      debugPrint('✅ [ConnectionProvider] SSE server started');
-    } catch (e) {
-      _error = 'Failed to start SSE server: $e';
-      debugPrint('❌ [ConnectionProvider] Failed to start SSE server: $e');
-      notifyListeners();
-      rethrow;
-    }
-  }
-
-  /// Stop SSE server
-  Future<void> stopSseServer() async {
-    if (!_sseServer.isRunning) {
-      return;
-    }
-
-    debugPrint('🛑 [ConnectionProvider] Stopping SSE server...');
-    await _sseServer.stopServer();
-
-    if (_connectionMode == ConnectionMode.sseServer) {
-      _connectionMode = ConnectionMode.ble;
-    }
-
-    notifyListeners();
-    debugPrint('✅ [ConnectionProvider] SSE server stopped');
-  }
-
-  /// Broadcast message to SSE clients (call this when receiving messages from BLE)
-  void broadcastMessageToSseClients(Message message) {
-    if (_sseServer.isRunning) {
-      _sseServer.broadcastMessage(message);
-    }
-  }
-
-  /// Broadcast contact to SSE clients (call this when receiving contacts from BLE)
-  void broadcastContactToSseClients(Contact contact) {
-    if (_sseServer.isRunning) {
-      _sseServer.broadcastContact(contact);
-    }
-  }
-
-  /// Get SSE server status
-  bool get isSseServerRunning => _sseServer.isRunning;
-
-  /// Get number of connected SSE clients
-  int get sseClientCount => _sseServer.connectedClients;
-
-  /// Set connection mode
-  void setConnectionMode(ConnectionMode mode) {
-    _connectionMode = mode;
-    notifyListeners();
-  }
-
-  /// Update SSE server configuration
-  void updateSseServerConfig(SseServerConfig config) {
-    _sseServerConfig = config;
-    notifyListeners();
-  }
-
   @override
   void dispose() {
     _rxActivityTimer?.cancel();
     _txActivityTimer?.cancel();
+    _stopAckCleanupTimer();
     _bleService.dispose();
     _tcpService?.dispose();
-    _sseServer.stopServer();
     super.dispose();
   }
 }

lib/providers/contacts_provider.dart

@@ -1,3 +1,4 @@
+import 'dart:convert';
 import 'dart:math';
 import 'package:flutter/foundation.dart';
 import 'package:latlong2/latlong.dart';
@@ -12,14 +13,40 @@ import '../utils/key_comparison.dart';
 class PendingAdvert {
   final Uint8List publicKey;
   final DateTime receivedAt;
+  final String? advName;
+  final int? typeValue;
+  final int? flags;
+  final int? lastAdvert;
+  final int? advLat;
+  final int? advLon;
   final int? signedEncodedPathLen;
   final Uint8List? paddedPathBytes;
+  final int? rxRssiDbm;
+  final int? rxSnrRaw;
+  final int? repeaterBatteryMv;
+  final int? repeaterQueueLen;
+  final int? repeaterLastRssi;
+  final int? repeaterLastSnrRaw;
+  final int? repeaterUptimeSecs;
 
   const PendingAdvert({
     required this.publicKey,
     required this.receivedAt,
+    this.advName,
+    this.typeValue,
+    this.flags,
+    this.lastAdvert,
+    this.advLat,
+    this.advLon,
     this.signedEncodedPathLen,
     this.paddedPathBytes,
+    this.rxRssiDbm,
+    this.rxSnrRaw,
+    this.repeaterBatteryMv,
+    this.repeaterQueueLen,
+    this.repeaterLastRssi,
+    this.repeaterLastSnrRaw,
+    this.repeaterUptimeSecs,
   });
 
   String get publicKeyHex =>
@@ -33,16 +60,55 @@ class PendingAdvert {
   PendingAdvert copyWith({
     Uint8List? publicKey,
     DateTime? receivedAt,
+    String? advName,
+    int? typeValue,
+    int? flags,
+    int? lastAdvert,
+    int? advLat,
+    int? advLon,
     int? signedEncodedPathLen,
     Uint8List? paddedPathBytes,
+    int? rxRssiDbm,
+    int? rxSnrRaw,
+    int? repeaterBatteryMv,
+    int? repeaterQueueLen,
+    int? repeaterLastRssi,
+    int? repeaterLastSnrRaw,
+    int? repeaterUptimeSecs,
   }) {
     return PendingAdvert(
       publicKey: publicKey ?? this.publicKey,
       receivedAt: receivedAt ?? this.receivedAt,
+      advName: advName ?? this.advName,
+      typeValue: typeValue ?? this.typeValue,
+      flags: flags ?? this.flags,
+      lastAdvert: lastAdvert ?? this.lastAdvert,
+      advLat: advLat ?? this.advLat,
+      advLon: advLon ?? this.advLon,
       signedEncodedPathLen: signedEncodedPathLen ?? this.signedEncodedPathLen,
       paddedPathBytes: paddedPathBytes ?? this.paddedPathBytes,
+      rxRssiDbm: rxRssiDbm ?? this.rxRssiDbm,
+      rxSnrRaw: rxSnrRaw ?? this.rxSnrRaw,
+      repeaterBatteryMv: repeaterBatteryMv ?? this.repeaterBatteryMv,
+      repeaterQueueLen: repeaterQueueLen ?? this.repeaterQueueLen,
+      repeaterLastRssi: repeaterLastRssi ?? this.repeaterLastRssi,
+      repeaterLastSnrRaw: repeaterLastSnrRaw ?? this.repeaterLastSnrRaw,
+      repeaterUptimeSecs: repeaterUptimeSecs ?? this.repeaterUptimeSecs,
     );
   }
+
+  double? get repeaterBatteryPercent {
+    if (repeaterBatteryMv == null) return null;
+    final voltage = repeaterBatteryMv! / 1000.0;
+    if (voltage <= 3.0) return 0.0;
+    if (voltage >= 4.2) return 100.0;
+    return ((voltage - 3.0) / 1.2) * 100.0;
+  }
+
+  double? get repeaterLastSnr =>
+      repeaterLastSnrRaw == null ? null : repeaterLastSnrRaw! / 4.0;
+
+  double? get rxSnr => rxSnrRaw == null ? null : rxSnrRaw! / 4.0;
 }
 
 class _RetainedRoute {
@@ -64,6 +130,10 @@ class ContactsProvider with ChangeNotifier {
   final Map<String, PendingAdvert> _pendingAdverts = {};
   final ContactStorageService _storageService = ContactStorageService();
   bool _isInitialized = false;
+  bool _isPersisting = false;
+  bool _persistRequested = false;
+  bool _isPersistingPendingAdverts = false;
+  bool _persistPendingAdvertsRequested = false;
 
   // Add default public channel on initialization
   ContactsProvider() {
@@ -83,6 +153,7 @@ class ContactsProvider with ChangeNotifier {
       );
       final storedContacts = await _storageService.loadContacts();
       final storedGroups = await _storageService.loadContactGroups();
+      final storedPendingAdverts = await _storageService.loadPendingAdverts();
 
       // Add stored contacts (excluding any with all-zeros public key)
       const publicChannelKey =
@@ -99,6 +170,7 @@ class ContactsProvider with ChangeNotifier {
       _savedContactGroups
         ..clear()
         ..addAll(storedGroups);
+      _restorePendingAdverts(storedPendingAdverts);
       debugPrint(
         '✅ [ContactsProvider] Early loaded ${storedContacts.length} persisted contacts and ${storedGroups.length} groups',
       );
@@ -131,6 +203,7 @@ class ContactsProvider with ChangeNotifier {
         excludePublicKey: devicePublicKey,
       );
       final storedGroups = await _storageService.loadContactGroups();
+      final storedPendingAdverts = await _storageService.loadPendingAdverts();
 
       // Add stored contacts (excluding any with all-zeros public key)
       const publicChannelKey =
@@ -147,6 +220,10 @@ class ContactsProvider with ChangeNotifier {
       _savedContactGroups
         ..clear()
         ..addAll(storedGroups);
+      _restorePendingAdverts(
+        storedPendingAdverts,
+        devicePublicKey: devicePublicKey,
+      );
       debugPrint(
         '✅ [ContactsProvider] Loaded ${storedContacts.length} persisted contacts and ${storedGroups.length} groups',
       );
@@ -202,19 +279,38 @@ class ContactsProvider with ChangeNotifier {
     }
   }
 
-  /// Persist contacts to storage (async, non-blocking)
+  /// Persist contacts to storage (async, non-blocking, coalescing).
   Future<void> _persistContacts() async {
+    _persistRequested = true;
+    if (_isPersisting) return;
+    _isPersisting = true;
     try {
-      // Don't persist the public channel pseudo-contact (all zeros key)
-      const publicChannelKey =
-          '0000000000000000000000000000000000000000000000000000000000000000';
-      final contactsToSave = _contacts.entries
-          .where((entry) => entry.key != publicChannelKey)
-          .map((entry) => entry.value)
-          .toList();
-      await _storageService.saveContacts(contactsToSave);
+      while (_persistRequested) {
+        _persistRequested = false;
+        await _storageService.saveContacts(_contactsForStorage());
+      }
     } catch (e) {
       debugPrint('❌ [ContactsProvider] Error persisting contacts: $e');
+    } finally {
+      _isPersisting = false;
+    }
+  }
+
+  Future<void> _persistPendingAdverts() async {
+    _persistPendingAdvertsRequested = true;
+    if (_isPersistingPendingAdverts) return;
+    _isPersistingPendingAdverts = true;
+    try {
+      while (_persistPendingAdvertsRequested) {
+        _persistPendingAdvertsRequested = false;
+        await _storageService.savePendingAdverts(
+          _pendingAdverts.values.map(_pendingAdvertToJson).toList(),
+        );
+      }
+    } catch (e) {
+      debugPrint('❌ [ContactsProvider] Error persisting pending adverts: $e');
+    } finally {
+      _isPersistingPendingAdverts = false;
     }
   }
 
@@ -226,6 +322,28 @@ class ContactsProvider with ChangeNotifier {
       _pendingAdverts.values.toList()
         ..sort((a, b) => b.receivedAt.compareTo(a.receivedAt));
 
+  PendingAdvert? pendingAdvertByKey(Uint8List publicKey) {
+    final keyHex = publicKey
+        .map((b) => b.toRadixString(16).padLeft(2, '0'))
+        .join('');
+    return _pendingAdverts[keyHex];
+  }
+
+  bool shouldEnrichPendingAdvert(Uint8List publicKey) {
+    final advert = pendingAdvertByKey(publicKey);
+    if (advert == null) {
+      return false;
+    }
+
+    final hasName = advert.advName?.trim().isNotEmpty ?? false;
+    final hasType = advert.typeValue != null && advert.typeValue != 0;
+    final hasLocation =
+        advert.advLat != null &&
+        advert.advLon != null &&
+        (advert.advLat != 0 || advert.advLon != 0);
+    return !(hasName && hasType && hasLocation);
+  }
+
   List<SavedContactGroup> savedGroupsForSection(String sectionKey) {
     return savedContactGroups
         .where((group) => group.sectionKey == sectionKey)
@@ -332,6 +450,9 @@ class ContactsProvider with ChangeNotifier {
   List<Contact> get repeaters =>
       contacts.where((c) => c.isRepeater).toList()..sort(_sortByLastSeen);
 
+  List<Contact> get sensorContacts =>
+      contacts.where((c) => c.isSensor).toList()..sort(_sortByLastSeen);
+
   List<Contact> get rooms =>
       contacts.where((c) => c.isRoom).toList()..sort(_sortByLastSeen);
 
@@ -440,6 +561,7 @@ class ContactsProvider with ChangeNotifier {
       '   ✅ Contact added/updated. Total contacts: ${_contacts.length}, channels: ${channels.length}',
     );
     _persistContacts();
+    _persistPendingAdverts();
     notifyListeners();
     debugPrint('   🔔 notifyListeners() called');
   }
@@ -471,6 +593,7 @@ class ContactsProvider with ChangeNotifier {
       );
     }
     _persistContacts();
+    _persistPendingAdverts();
     notifyListeners();
   }
 
@@ -503,7 +626,6 @@ class ContactsProvider with ChangeNotifier {
     if (existingContact == null) {
       var newContact = incomingContact.copyWith(
         isNew: true,
-        nameOverride: existingContact?.nameOverride,
         telemetry: mergedTelemetry,
         outPathLen:
             retainedRoute?.signedEncodedPathLen ?? incomingContact.outPathLen,
@@ -753,10 +875,19 @@ class ContactsProvider with ChangeNotifier {
           telemetry.gpsLocation,
         )) {
           debugPrint(
-            '  ⚠️ Retaining last valid GPS. Incoming telemetry GPS is invalid/missing: $incomingGps',
+            '  ⚠️ Incoming telemetry GPS is invalid/missing; keeping last known contact location as fallback: $incomingGps',
           );
         }
-        telemetry = mergedTelemetry;
+        telemetry = ContactTelemetry(
+          gpsLocation: telemetry.gpsLocation,
+          batteryPercentage: mergedTelemetry.batteryPercentage,
+          batteryMilliVolts: mergedTelemetry.batteryMilliVolts,
+          temperature: mergedTelemetry.temperature,
+          timestamp: mergedTelemetry.timestamp,
+          humidity: mergedTelemetry.humidity,
+          pressure: mergedTelemetry.pressure,
+          extraSensorData: telemetry.extraSensorData,
+        );
       }
 
       // Update contact with new telemetry AND last seen time
@@ -871,10 +1002,10 @@ class ContactsProvider with ChangeNotifier {
     // last known reading for any field that is omitted in the incoming update.
     final incomingGps = _getValidGpsOrNull(incomingTelemetry.gpsLocation);
     final previousGps = _getValidGpsOrNull(existingTelemetry?.gpsLocation);
-    final mergedExtraSensorData = <String, dynamic>{
-      ...?existingTelemetry?.extraSensorData,
-      ...?incomingTelemetry.extraSensorData,
-    };
+    final mergedExtraSensorData = _mergeExtraSensorData(
+      existingTelemetry?.extraSensorData,
+      incomingTelemetry.extraSensorData,
+    );
 
     return ContactTelemetry(
       gpsLocation: incomingGps ?? previousGps,
@@ -895,6 +1026,49 @@ class ContactsProvider with ChangeNotifier {
     );
   }
 
+  Map<String, dynamic> _mergeExtraSensorData(
+    Map<String, dynamic>? existingExtraSensorData,
+    Map<String, dynamic>? incomingExtraSensorData,
+  ) {
+    final merged = <String, dynamic>{...?existingExtraSensorData};
+    if (incomingExtraSensorData == null || incomingExtraSensorData.isEmpty) {
+      return merged;
+    }
+
+    final incomingMetricFamilies = incomingExtraSensorData.keys
+        .map(_telemetryMetricFamilyForKey)
+        .whereType<String>()
+        .toSet();
+    if (incomingMetricFamilies.isNotEmpty) {
+      merged.removeWhere((key, _) {
+        final family = _telemetryMetricFamilyForKey(key);
+        return family != null && incomingMetricFamilies.contains(family);
+      });
+    }
+
+    merged.addAll(incomingExtraSensorData);
+    return merged;
+  }
+
+  String? _telemetryMetricFamilyForKey(String key) {
+    const sourcePrefix = '__source_channel:';
+    if (key.startsWith(sourcePrefix)) {
+      return key.substring(sourcePrefix.length);
+    }
+
+    final separatorIndex = key.lastIndexOf('_');
+    if (separatorIndex <= 0 || separatorIndex == key.length - 1) {
+      return key;
+    }
+
+    final suffix = key.substring(separatorIndex + 1);
+    if (int.tryParse(suffix) == null) {
+      return key;
+    }
+
+    return key.substring(0, separatorIndex);
+  }
+
   int _coordinateToAdvertMicrodegrees(double coordinate) {
     return (coordinate * 1e6).round();
   }
@@ -908,7 +1082,7 @@ class ContactsProvider with ChangeNotifier {
         .map((b) => b.toRadixString(16).padLeft(2, '0'))
         .join('');
 
-    for (final contact in contacts) {
+    for (final contact in _contacts.values) {
       if (contact.publicKeyHex.startsWith(prefixHex)) {
         return contact;
       }
@@ -1063,39 +1237,132 @@ class ContactsProvider with ChangeNotifier {
   }
 
   /// Add or refresh a pending advert entry from PUSH_CODE_ADVERT (0x80).
-  /// Excludes self key and existing contacts.
-  void addPendingAdvert(Uint8List publicKey, {Uint8List? devicePublicKey}) {
+  /// Excludes only self key; known contacts still keep a discovery entry.
+  bool addPendingAdvert(Uint8List publicKey, {Uint8List? devicePublicKey}) {
     if (devicePublicKey != null && publicKey.matches(devicePublicKey)) {
-      return;
+      return false;
     }
 
     final keyHex = publicKey
         .map((b) => b.toRadixString(16).padLeft(2, '0'))
         .join('');
-    if (_contacts.containsKey(keyHex)) {
-      _pendingAdverts.remove(keyHex);
-      return;
-    }
-
     final existing = _pendingAdverts[keyHex];
     final now = DateTime.now();
     if (existing != null) {
       _pendingAdverts[keyHex] = existing.copyWith(receivedAt: now);
+      _persistPendingAdverts();
+      notifyListeners();
+      return false;
     } else {
       _pendingAdverts[keyHex] = PendingAdvert(
         publicKey: Uint8List.fromList(publicKey),
         receivedAt: now,
       );
+      _persistPendingAdverts();
+      notifyListeners();
+      return true;
     }
+  }
+
+  bool addOrUpdatePendingAdvertContact(
+    Contact contact, {
+    Uint8List? devicePublicKey,
+  }) {
+    if (devicePublicKey != null && contact.publicKey.matches(devicePublicKey)) {
+      return false;
+    }
+
+    final keyHex = contact.publicKeyHex;
+    final route = ContactRouteCodec.fromContact(contact);
+    final existing = _pendingAdverts[keyHex];
+    final now = DateTime.now();
+    final updated =
+        (existing ??
+                PendingAdvert(
+                  publicKey: Uint8List.fromList(contact.publicKey),
+                  receivedAt: now,
+                ))
+            .copyWith(
+              receivedAt: now,
+              advName: contact.advName.trim().isEmpty ? null : contact.advName,
+              typeValue: contact.type.value,
+              flags: contact.flags,
+              lastAdvert: contact.lastAdvert,
+              advLat: contact.advLat,
+              advLon: contact.advLon,
+              signedEncodedPathLen:
+                  route?.signedEncodedPathLen ?? existing?.signedEncodedPathLen,
+              paddedPathBytes: route?.paddedPathBytes == null
+                  ? existing?.paddedPathBytes
+                  : Uint8List.fromList(route!.paddedPathBytes),
+            );
+
+    _pendingAdverts[keyHex] = updated;
+    _persistPendingAdverts();
     notifyListeners();
+    return existing == null;
+  }
+
+  bool addOrUpdatePendingAdvertMetadata({
+    required Uint8List publicKey,
+    required int typeValue,
+    Uint8List? devicePublicKey,
+    int? flags,
+    String? advName,
+    int? lastAdvert,
+    int? advLat,
+    int? advLon,
+    int? signedEncodedPathLen,
+    Uint8List? paddedPathBytes,
+    int? rxRssiDbm,
+    int? rxSnrRaw,
+    DateTime? receivedAt,
+  }) {
+    if (devicePublicKey != null && publicKey.matches(devicePublicKey)) {
+      return false;
+    }
+
+    final keyHex = publicKey
+        .map((b) => b.toRadixString(16).padLeft(2, '0'))
+        .join('');
+    final existing = _pendingAdverts[keyHex];
+    final nextReceivedAt = receivedAt ?? DateTime.now();
+    _pendingAdverts[keyHex] =
+        (existing ??
+                PendingAdvert(
+                  publicKey: Uint8List.fromList(publicKey),
+                  receivedAt: nextReceivedAt,
+                ))
+            .copyWith(
+              receivedAt: nextReceivedAt,
+              typeValue: typeValue,
+              advName: advName?.trim().isNotEmpty == true
+                  ? advName!.trim()
+                  : existing?.advName,
+              flags: flags ?? existing?.flags,
+              lastAdvert: lastAdvert ?? existing?.lastAdvert,
+              advLat: advLat ?? existing?.advLat,
+              advLon: advLon ?? existing?.advLon,
+              signedEncodedPathLen:
+                  signedEncodedPathLen ?? existing?.signedEncodedPathLen,
+              paddedPathBytes: paddedPathBytes == null
+                  ? existing?.paddedPathBytes
+                  : Uint8List.fromList(paddedPathBytes),
+              rxRssiDbm: rxRssiDbm ?? existing?.rxRssiDbm,
+              rxSnrRaw: rxSnrRaw ?? existing?.rxSnrRaw,
+            );
+
+    _persistPendingAdverts();
+    notifyListeners();
+    return existing == null;
   }
 
   /// Find contact by name
   Contact? findContactByName(String name) {
-    return contacts.firstWhere(
-      (c) => c.advName == name,
-      orElse: () => contacts.first,
-    );
+    for (final contact in _contacts.values) {
+      if (contact.advName == name) return contact;
+    }
+    return null;
   }
 
   /// Get contacts with low battery
@@ -1144,7 +1411,9 @@ class ContactsProvider with ChangeNotifier {
   void clearContacts() {
     _contacts.clear();
     _pendingAdverts.clear();
+    _ensurePublicChannelExists();
     _persistContacts();
+    _persistPendingAdverts();
     notifyListeners();
   }
 
@@ -1167,6 +1436,7 @@ class ContactsProvider with ChangeNotifier {
     _contacts.remove(publicKeyHex);
     _pendingAdverts.remove(publicKeyHex);
     _persistContacts();
+    _persistPendingAdverts();
     notifyListeners();
   }
 
@@ -1175,11 +1445,145 @@ class ContactsProvider with ChangeNotifier {
     return await _storageService.getStorageStats();
   }
 
+  Future<void> persistNow() async {
+    await _storageService.saveContacts(_contactsForStorage());
+  }
+
+  Future<void> clearPendingAdverts() async {
+    if (_pendingAdverts.isEmpty) {
+      return;
+    }
+    _pendingAdverts.clear();
+    await _storageService.clearPendingAdverts();
+    notifyListeners();
+  }
+
+  void updatePendingAdvertStatusByPrefix(
+    Uint8List publicKeyPrefix, {
+    int? batteryMv,
+    int? queueLen,
+    int? lastRssi,
+    int? lastSnrRaw,
+    int? uptimeSecs,
+  }) {
+    final prefixHex = publicKeyPrefix
+        .map((b) => b.toRadixString(16).padLeft(2, '0'))
+        .join('');
+    final match = _pendingAdverts.entries.where(
+      (entry) => entry.key.startsWith(prefixHex),
+    );
+    if (match.isEmpty) {
+      return;
+    }
+    final key = match.first.key;
+    final existing = _pendingAdverts[key]!;
+    _pendingAdverts[key] = existing.copyWith(
+      repeaterBatteryMv: batteryMv,
+      repeaterQueueLen: queueLen,
+      repeaterLastRssi: lastRssi,
+      repeaterLastSnrRaw: lastSnrRaw,
+      repeaterUptimeSecs: uptimeSecs,
+    );
+    _persistPendingAdverts();
+    notifyListeners();
+  }
+
+  List<Contact> _contactsForStorage() {
+    // Don't persist the public channel pseudo-contact (all zeros key)
+    const publicChannelKey =
+        '0000000000000000000000000000000000000000000000000000000000000000';
+    return _contacts.entries
+        .where((entry) => entry.key != publicChannelKey)
+        .map((entry) => entry.value)
+        .toList();
+  }
+
+  void _restorePendingAdverts(
+    List<Map<String, dynamic>> storedPendingAdverts, {
+    Uint8List? devicePublicKey,
+  }) {
+    _pendingAdverts.clear();
+    for (final json in storedPendingAdverts) {
+      final advert = _pendingAdvertFromJson(json);
+      if (advert == null) continue;
+      if (devicePublicKey != null &&
+          advert.publicKey.matches(devicePublicKey)) {
+        continue;
+      }
+      if (_contacts.containsKey(advert.publicKeyHex)) {
+        continue;
+      }
+      _pendingAdverts[advert.publicKeyHex] = advert;
+    }
+  }
+
+  Map<String, dynamic> _pendingAdvertToJson(PendingAdvert advert) {
+    return {
+      'publicKey': base64Encode(advert.publicKey),
+      'receivedAtMillis': advert.receivedAt.millisecondsSinceEpoch,
+      'advName': advert.advName,
+      'typeValue': advert.typeValue,
+      'flags': advert.flags,
+      'lastAdvert': advert.lastAdvert,
+      'advLat': advert.advLat,
+      'advLon': advert.advLon,
+      'signedEncodedPathLen': advert.signedEncodedPathLen,
+      'paddedPathBytes': advert.paddedPathBytes == null
+          ? null
+          : base64Encode(advert.paddedPathBytes!),
+      'rxRssiDbm': advert.rxRssiDbm,
+      'rxSnrRaw': advert.rxSnrRaw,
+      'repeaterBatteryMv': advert.repeaterBatteryMv,
+      'repeaterQueueLen': advert.repeaterQueueLen,
+      'repeaterLastRssi': advert.repeaterLastRssi,
+      'repeaterLastSnrRaw': advert.repeaterLastSnrRaw,
+      'repeaterUptimeSecs': advert.repeaterUptimeSecs,
+    };
+  }
+
+  PendingAdvert? _pendingAdvertFromJson(Map<String, dynamic> json) {
+    try {
+      return PendingAdvert(
+        publicKey: Uint8List.fromList(
+          base64Decode(json['publicKey'] as String),
+        ),
+        receivedAt: DateTime.fromMillisecondsSinceEpoch(
+          json['receivedAtMillis'] as int,
+        ),
+        advName: json['advName'] as String?,
+        typeValue: json['typeValue'] as int?,
+        flags: json['flags'] as int?,
+        lastAdvert: json['lastAdvert'] as int?,
+        advLat: json['advLat'] as int?,
+        advLon: json['advLon'] as int?,
+        signedEncodedPathLen: json['signedEncodedPathLen'] as int?,
+        paddedPathBytes: json['paddedPathBytes'] == null
+            ? null
+            : Uint8List.fromList(
+                base64Decode(json['paddedPathBytes'] as String),
+              ),
+        rxRssiDbm: json['rxRssiDbm'] as int?,
+        rxSnrRaw: json['rxSnrRaw'] as int?,
+        repeaterBatteryMv: json['repeaterBatteryMv'] as int?,
+        repeaterQueueLen: json['repeaterQueueLen'] as int?,
+        repeaterLastRssi: json['repeaterLastRssi'] as int?,
+        repeaterLastSnrRaw: json['repeaterLastSnrRaw'] as int?,
+        repeaterUptimeSecs: json['repeaterUptimeSecs'] as int?,
+      );
+    } catch (e) {
+      debugPrint(
+        '❌ [ContactsProvider] Error parsing pending advert from JSON: $e',
+      );
+      return null;
+    }
+  }
+
   /// Get contact count by type
   Map<String, int> get contactCounts {
     return {
       'chat': chatContacts.length,
       'repeater': repeaters.length,
+      'sensor': sensorContacts.length,
       'room': rooms.length,
       'total': contacts.length,
     };

lib/providers/drawing_provider.dart

@@ -22,6 +22,7 @@ class DrawingProvider with ChangeNotifier {
 
   // Completed drawings
   final List<MapDrawing> _drawings = [];
+  bool _isInitialized = false;
 
   // In-progress drawing
   MapDrawing? _currentDrawing;
@@ -53,6 +54,7 @@ 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;
@@ -61,6 +63,7 @@ class DrawingProvider with ChangeNotifier {
   Future<void> initialize() async {
     await _loadPreferences();
     await _loadDrawings();
+    _isInitialized = true;
   }
 
   /// Set drawing mode

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/messages_provider.dart

@@ -18,6 +18,8 @@ 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);
@@ -28,6 +30,8 @@ class MessagesProvider with ChangeNotifier {
   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 = {};
@@ -549,6 +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(
@@ -580,8 +593,21 @@ class MessagesProvider with ChangeNotifier {
       if (contactLocationSnapshot != null) {
         _messageContactLocations[existingId] = contactLocationSnapshot;
       }
+      _messageReceptionDetails[existingId] =
+          MessageReceptionDetails.mergeDuplicate(
+            existing: _messageReceptionDetails[existingId],
+            incoming: receptionDetailsSnapshot,
+          );
       if (receptionDetailsSnapshot != null) {
-        _messageReceptionDetails[existingId] = receptionDetailsSnapshot;
+        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
@@ -692,7 +718,7 @@ class MessagesProvider with ChangeNotifier {
           incomingSenderName != null &&
           existingSenderName == incomingSenderName) {
         if (!existing.isSentMessage && !message.isSentMessage) {
-          return true;
+          return withinChannelRepeatWindow;
         }
 
         if (!withinChannelRepeatWindow) {
@@ -715,7 +741,8 @@ class MessagesProvider with ChangeNotifier {
       return false;
     }
 
-    return true;
+    // System messages and other types: never deduplicate by scope alone.
+    return false;
   }
 
   /// Add multiple messages
@@ -725,10 +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 (_findDuplicateMessageIndex(enhancedMessage) != -1) {
+      final duplicateIndex = _findDuplicateMessageIndex(enhancedMessage);
+      if (duplicateIndex != -1) {
+        final existingId = _messages[duplicateIndex].id;
+        _messageReceptionDetails[existingId] =
+            MessageReceptionDetails.mergeDuplicate(
+              existing: _messageReceptionDetails[existingId],
+            );
         duplicateCount++;
         continue; // Skip duplicate
       }
@@ -973,18 +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;
     }
   }
 
@@ -1028,6 +1100,7 @@ class MessagesProvider with ChangeNotifier {
     for (final messageId in messageIdsToRemove) {
       _timeoutTimers[messageId]?.cancel();
       _timeoutTimers.remove(messageId);
+      _clearChannelSendWarning(messageId);
       _messageContactMap.remove(messageId);
       _groupedMessageMapping.remove(messageId);
       _messageContactLocations.remove(messageId);
@@ -1062,6 +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);
@@ -1245,11 +1347,7 @@ class MessagesProvider with ChangeNotifier {
 
   /// Clear all messages
   void clearMessages() {
-    for (final timer in _channelEchoWarningTimers.values) {
-      timer.cancel();
-    }
-    _channelEchoWarningTimers.clear();
-    _channelEchoWarningMessageIds.clear();
+    _cancelAllTimers();
     _messages.clear();
     _sarMarkers.clear();
     _removedSarMarkerIds.clear();
@@ -1257,6 +1355,14 @@ class MessagesProvider with ChangeNotifier {
     _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();
@@ -1272,11 +1378,7 @@ class MessagesProvider with ChangeNotifier {
 
   /// Clear all data
   void clearAll() {
-    for (final timer in _channelEchoWarningTimers.values) {
-      timer.cancel();
-    }
-    _channelEchoWarningTimers.clear();
-    _channelEchoWarningMessageIds.clear();
+    _cancelAllTimers();
     _messages.clear();
     _sarMarkers.clear();
     _removedSarMarkerIds.clear();
@@ -1284,6 +1386,14 @@ class MessagesProvider with ChangeNotifier {
     _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();
@@ -1964,7 +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(),
@@ -2323,6 +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,
@@ -2410,7 +2521,19 @@ class MessagesProvider with ChangeNotifier {
 
   @override
   void dispose() {
-    // Cancel all pending timeout timers
+    _cancelAllTimers();
+    _completedAckHistory.clear();
+    _messageAckHistory.clear();
+    _ackHistoryLookup.clear();
+
+    // Clear retry manager
+    _retryManager.clearAll();
+
+    super.dispose();
+  }
+
+  /// Cancel all pending timers (timeout + echo warning).
+  void _cancelAllTimers() {
     for (final timer in _timeoutTimers.values) {
       timer.cancel();
     }
@@ -2420,14 +2543,6 @@ class MessagesProvider with ChangeNotifier {
     }
     _channelEchoWarningTimers.clear();
     _channelEchoWarningMessageIds.clear();
-    _completedAckHistory.clear();
-    _messageAckHistory.clear();
-    _ackHistoryLookup.clear();
-
-    // Clear retry manager
-    _retryManager.clearAll();
-
-    super.dispose();
   }
 
   void _rememberCompletedAck(int ackCode) {

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/screens/add_contact_screen.dart

@@ -0,0 +1,386 @@
+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);
+    final colorScheme = theme.colorScheme;
+
+    return Scaffold(
+      appBar: AppBar(title: const Text('Import Contact')),
+      body: ListView(
+        padding: const EdgeInsets.all(16),
+        children: [
+          Container(
+            padding: const EdgeInsets.all(18),
+            decoration: BoxDecoration(
+              color: colorScheme.surfaceContainerHighest.withValues(alpha: 0.5),
+              borderRadius: BorderRadius.circular(20),
+              border: Border.all(
+                color: colorScheme.outlineVariant.withValues(alpha: 0.6),
+              ),
+            ),
+            child: Column(
+              crossAxisAlignment: CrossAxisAlignment.start,
+              children: [
+                Row(
+                  children: [
+                    Container(
+                      padding: const EdgeInsets.all(10),
+                      decoration: BoxDecoration(
+                        color: colorScheme.primary.withValues(alpha: 0.12),
+                        borderRadius: BorderRadius.circular(14),
+                      ),
+                      child: Icon(
+                        Icons.person_add_alt_1_outlined,
+                        color: colorScheme.primary,
+                      ),
+                    ),
+                    const SizedBox(width: 12),
+                    Expanded(
+                      child: Text(
+                        'Import a shared contact advert',
+                        style: theme.textTheme.titleMedium?.copyWith(
+                          fontWeight: FontWeight.w700,
+                        ),
+                      ),
+                    ),
+                  ],
+                ),
+                const SizedBox(height: 14),
+                Text(
+                  'Paste a `meshcore://...` link or raw hexadecimal advert. The app will validate it and import the contact into the connected device.',
+                  style: theme.textTheme.bodyMedium?.copyWith(
+                    color: colorScheme.onSurfaceVariant,
+                  ),
+                ),
+                const SizedBox(height: 14),
+                Wrap(
+                  spacing: 8,
+                  runSpacing: 8,
+                  children: const [
+                    _ImportHintChip(
+                      icon: Icons.link_outlined,
+                      label: 'Accepts share links',
+                    ),
+                    _ImportHintChip(
+                      icon: Icons.code_outlined,
+                      label: 'Supports raw hex',
+                    ),
+                    _ImportHintChip(
+                      icon: Icons.content_paste_go_outlined,
+                      label: 'Clipboard-friendly',
+                    ),
+                  ],
+                ),
+              ],
+            ),
+          ),
+          const SizedBox(height: 16),
+          Container(
+            padding: const EdgeInsets.all(16),
+            decoration: BoxDecoration(
+              color: colorScheme.surface,
+              borderRadius: BorderRadius.circular(20),
+              border: Border.all(
+                color: colorScheme.outlineVariant.withValues(alpha: 0.7),
+              ),
+            ),
+            child: Column(
+              crossAxisAlignment: CrossAxisAlignment.start,
+              children: [
+                Text(
+                  'Advert payload',
+                  style: theme.textTheme.titleSmall?.copyWith(
+                    fontWeight: FontWeight.w700,
+                  ),
+                ),
+                const SizedBox(height: 6),
+                Text(
+                  'You can paste the full share link or only the hex payload.',
+                  style: theme.textTheme.bodySmall?.copyWith(
+                    color: colorScheme.onSurfaceVariant,
+                  ),
+                ),
+                const SizedBox(height: 12),
+                TextField(
+                  controller: _advertController,
+                  minLines: 5,
+                  maxLines: 9,
+                  onChanged: (_) {
+                    if (_validationError != null || _importSucceeded) {
+                      setState(() {
+                        _importSucceeded = false;
+                        _validationError = null;
+                      });
+                    }
+                  },
+                  decoration: InputDecoration(
+                    labelText: 'Contact advert',
+                    hintText: 'Paste a share link or hex advert',
+                    alignLabelWithHint: true,
+                    border: const OutlineInputBorder(),
+                    errorText: _validationError,
+                  ),
+                ),
+                const SizedBox(height: 12),
+                Row(
+                  children: [
+                    Expanded(
+                      child: Text(
+                        normalized == null
+                            ? 'No valid advert detected yet'
+                            : 'Advert size: ${normalized.length ~/ 2} bytes',
+                        style: theme.textTheme.bodySmall?.copyWith(
+                          color: colorScheme.onSurfaceVariant,
+                        ),
+                      ),
+                    ),
+                    TextButton.icon(
+                      onPressed: _isImporting ? null : _pasteFromClipboard,
+                      icon: const Icon(Icons.content_paste_go_outlined),
+                      label: const Text('Paste'),
+                    ),
+                  ],
+                ),
+              ],
+            ),
+          ),
+          const SizedBox(height: 20),
+          FilledButton.icon(
+            onPressed: (_isImporting || _importSucceeded)
+                ? null
+                : _importContact,
+            style: FilledButton.styleFrom(
+              padding: const EdgeInsets.symmetric(vertical: 14),
+            ),
+            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
+                  ? 'Imported'
+                  : 'Import Contact',
+            ),
+          ),
+          const SizedBox(height: 12),
+          if (_importSucceeded)
+            Container(
+              padding: const EdgeInsets.all(14),
+              decoration: BoxDecoration(
+                color: colorScheme.primary.withValues(alpha: 0.08),
+                borderRadius: BorderRadius.circular(16),
+                border: Border.all(
+                  color: colorScheme.primary.withValues(alpha: 0.18),
+                ),
+              ),
+              child: Row(
+                crossAxisAlignment: CrossAxisAlignment.start,
+                children: [
+                  Icon(
+                    Icons.check_circle,
+                    size: 18,
+                    color: colorScheme.primary,
+                  ),
+                  const SizedBox(width: 10),
+                  Expanded(
+                    child: Text(
+                      'Contact imported. Paste another advert or edit the current one to import again.',
+                      style: theme.textTheme.bodySmall?.copyWith(
+                        color: colorScheme.onSurfaceVariant,
+                      ),
+                    ),
+                  ),
+                ],
+              ),
+            ),
+        ],
+      ),
+    );
+  }
+}
+
+class _ImportHintChip extends StatelessWidget {
+  final IconData icon;
+  final String label;
+
+  const _ImportHintChip({required this.icon, required this.label});
+
+  @override
+  Widget build(BuildContext context) {
+    final theme = Theme.of(context);
+    return Container(
+      padding: const EdgeInsets.symmetric(horizontal: 10, vertical: 8),
+      decoration: BoxDecoration(
+        color: theme.colorScheme.surface,
+        borderRadius: BorderRadius.circular(999),
+        border: Border.all(
+          color: theme.colorScheme.outlineVariant.withValues(alpha: 0.7),
+        ),
+      ),
+      child: Row(
+        mainAxisSize: MainAxisSize.min,
+        children: [
+          Icon(icon, size: 16, color: theme.colorScheme.onSurfaceVariant),
+          const SizedBox(width: 6),
+          Text(label, style: theme.textTheme.labelMedium),
+        ],
+      ),
+    );
+  }
+}

lib/screens/contacts_tab.dart

@@ -17,6 +17,7 @@ import '../utils/avatar_label_helper.dart';
 import '../widgets/common/contact_avatar.dart';
 import '../widgets/contacts/contact_tile.dart';
 import '../widgets/contacts/add_channel_dialog.dart';
+import 'add_contact_screen.dart';
 
 class ContactsTab extends StatefulWidget {
   final VoidCallback? onNavigateToMap;
@@ -34,11 +35,10 @@ class ContactsTab extends StatefulWidget {
 
 class _ContactsTabState extends State<ContactsTab> {
   Position? _currentPosition;
-  final Set<String> _resolvingAdvertKeys = <String>{};
-  bool _isResolvingPendingBatch = false;
   final Map<ContactSection, String> _sectionFilters = {
     ContactSection.teamMembers: '',
     ContactSection.repeaters: '',
+    ContactSection.sensors: '',
     ContactSection.rooms: '',
     ContactSection.channels: '',
   };
@@ -46,6 +46,7 @@ class _ContactsTabState extends State<ContactsTab> {
   final Map<ContactSection, ContactSortMode> _sortModes = {
     ContactSection.teamMembers: ContactSortMode.lastSeen,
     ContactSection.repeaters: ContactSortMode.lastSeen,
+    ContactSection.sensors: ContactSortMode.lastSeen,
     ContactSection.rooms: ContactSortMode.lastSeen,
   };
 
@@ -99,57 +100,6 @@ class _ContactsTabState extends State<ContactsTab> {
     await _getCurrentLocation();
   }
 
-  Future<void> _handleResolveAdvert(PendingAdvert advert) async {
-    final keyHex = advert.publicKeyHex;
-    if (_resolvingAdvertKeys.contains(keyHex)) return;
-
-    setState(() {
-      _resolvingAdvertKeys.add(keyHex);
-    });
-
-    try {
-      await context.read<ConnectionProvider>().getContact(advert.publicKey);
-    } finally {
-      if (mounted) {
-        setState(() {
-          _resolvingAdvertKeys.remove(keyHex);
-        });
-      }
-    }
-  }
-
-  void _schedulePendingAdvertResolution(
-    List<PendingAdvert> pendingAdverts,
-    ConnectionProvider connectionProvider,
-  ) {
-    if (_isResolvingPendingBatch ||
-        !connectionProvider.deviceInfo.isConnected ||
-        pendingAdverts.isEmpty) {
-      return;
-    }
-
-    final advertsToResolve = pendingAdverts
-        .where((advert) => !_resolvingAdvertKeys.contains(advert.publicKeyHex))
-        .toList();
-    if (advertsToResolve.isEmpty) {
-      return;
-    }
-
-    WidgetsBinding.instance.addPostFrameCallback((_) async {
-      if (!mounted || _isResolvingPendingBatch) return;
-
-      _isResolvingPendingBatch = true;
-      try {
-        for (final advert in advertsToResolve) {
-          if (!mounted) break;
-          await _handleResolveAdvert(advert);
-        }
-      } finally {
-        _isResolvingPendingBatch = false;
-      }
-    });
-  }
-
   /// Calculate distance between two points in meters
   double _calculateDistanceInMeters(
     double lat1,
@@ -181,15 +131,6 @@ class _ContactsTabState extends State<ContactsTab> {
     }
   }
 
-  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);
-  }
-
   List<Contact> _filterContactsForSection(
     List<Contact> contacts,
     ContactSection section,
@@ -449,6 +390,12 @@ class _ContactsTabState extends State<ContactsTab> {
     );
   }
 
+  Future<void> _openAddContactScreen(BuildContext context) async {
+    await Navigator.of(
+      context,
+    ).push(MaterialPageRoute(builder: (context) => const AddContactScreen()));
+  }
+
   Future<void> _showDeleteChannelDialog(
     BuildContext context,
     Contact channel,
@@ -593,7 +540,6 @@ class _ContactsTabState extends State<ContactsTab> {
       body: Consumer<ContactsProvider>(
         builder: (context, contactsProvider, child) {
           final messagesProvider = context.watch<MessagesProvider>();
-          final connectionProvider = context.watch<ConnectionProvider>();
           final allChatContacts = _sortContacts(
             contactsProvider.chatContacts,
             ContactSection.teamMembers,
@@ -602,6 +548,10 @@ class _ContactsTabState extends State<ContactsTab> {
             contactsProvider.repeaters,
             ContactSection.repeaters,
           );
+          final allSensors = _sortContacts(
+            contactsProvider.sensorContacts,
+            ContactSection.sensors,
+          );
           final allRooms = _sortContacts(
             contactsProvider.rooms,
             ContactSection.rooms,
@@ -643,6 +593,19 @@ class _ContactsTabState extends State<ContactsTab> {
           final showRepeatersOthersGroup =
               visibleSavedRepeaterGroups.length > 1 &&
               ungroupedRepeaters.isNotEmpty;
+          final sensors = _filterContactsForSection(
+            allSensors,
+            ContactSection.sensors,
+          );
+          final savedSensorGroups = _buildSavedGroupsForSection(
+            contactsProvider,
+            allSensors,
+            ContactSection.sensors,
+          );
+          final visibleSavedSensorGroups =
+              _showSavedGroupsForSection(ContactSection.sensors)
+              ? savedSensorGroups
+              : const <_RenderedSavedGroup>[];
           final rooms = _filterContactsForSection(
             allRooms,
             ContactSection.rooms,
@@ -669,36 +632,18 @@ class _ContactsTabState extends State<ContactsTab> {
               _showSavedGroupsForSection(ContactSection.channels)
               ? savedChannelGroups
               : const <_RenderedSavedGroup>[];
-          final showTeamMembersSection =
-              allChatContacts.isNotEmpty &&
-              (!_sectionHasActiveFilter(ContactSection.teamMembers) ||
-                  chatContacts.isNotEmpty ||
-                  visibleSavedTeamGroups.isNotEmpty);
-          final showRepeatersSection =
-              allRepeaters.isNotEmpty &&
-              (!_sectionHasActiveFilter(ContactSection.repeaters) ||
-                  repeaters.isNotEmpty ||
-                  visibleSavedRepeaterGroups.isNotEmpty);
-          final showRoomsSection =
-              allRooms.isNotEmpty &&
-              (!_sectionHasActiveFilter(ContactSection.rooms) ||
-                  rooms.isNotEmpty ||
-                  visibleSavedRoomGroups.isNotEmpty);
-          final showChannelsSection =
-              !_sectionHasActiveFilter(ContactSection.channels) ||
-              filteredChannels.isNotEmpty ||
-              visibleSavedChannelGroups.isNotEmpty;
-          final pendingAdverts = contactsProvider.pendingAdverts;
-
-          _schedulePendingAdvertResolution(pendingAdverts, connectionProvider);
-
+          final showTeamMembersSection = allChatContacts.isNotEmpty;
+          final showRepeatersSection = allRepeaters.isNotEmpty;
+          final showSensorsSection = allSensors.isNotEmpty;
+          final showRoomsSection = allRooms.isNotEmpty;
+          final showChannelsSection = allChannels.isNotEmpty;
           // Check if there are any displayable contacts
           final hasDisplayableContacts =
               allChatContacts.isNotEmpty ||
               allRepeaters.isNotEmpty ||
+              allSensors.isNotEmpty ||
               allRooms.isNotEmpty ||
-              allChannels.isNotEmpty ||
-              pendingAdverts.isNotEmpty;
+              allChannels.isNotEmpty;
 
           if (!hasDisplayableContacts) {
             return Center(
@@ -721,6 +666,18 @@ class _ContactsTabState extends State<ContactsTab> {
                     style: Theme.of(context).textTheme.bodyMedium,
                     textAlign: TextAlign.center,
                   ),
+                  if (context
+                      .watch<ConnectionProvider>()
+                      .deviceInfo
+                      .isConnected)
+                    Padding(
+                      padding: const EdgeInsets.only(top: 16),
+                      child: OutlinedButton.icon(
+                        onPressed: () => _openAddContactScreen(context),
+                        icon: const Icon(Icons.person_add_alt_1_outlined),
+                        label: const Text('Import Contact'),
+                      ),
+                    ),
                 ],
               ),
             );
@@ -761,12 +718,16 @@ class _ContactsTabState extends State<ContactsTab> {
                     visibleSavedTeamGroups,
                     ContactSection.teamMembers,
                   ),
-                  ..._buildContactSectionItems(
-                    _excludeGroupedContacts(
-                      chatContacts,
-                      visibleSavedTeamGroups,
+                  if (chatContacts.isEmpty &&
+                      _sectionHasActiveFilter(ContactSection.teamMembers))
+                    _buildNoFilterResults(context)
+                  else
+                    ..._buildContactSectionItems(
+                      _excludeGroupedContacts(
+                        chatContacts,
+                        visibleSavedTeamGroups,
+                      ),
                     ),
-                  ),
                   const Divider(height: 32),
                 ],
 
@@ -799,7 +760,10 @@ class _ContactsTabState extends State<ContactsTab> {
                     visibleSavedRepeaterGroups,
                     ContactSection.repeaters,
                   ),
-                  if (showRepeatersOthersGroup)
+                  if (repeaters.isEmpty &&
+                      _sectionHasActiveFilter(ContactSection.repeaters))
+                    _buildNoFilterResults(context)
+                  else if (showRepeatersOthersGroup)
                     _InferredContactGroupCard(
                       label: 'Others',
                       contacts: ungroupedRepeaters,
@@ -819,6 +783,36 @@ class _ContactsTabState extends State<ContactsTab> {
                   const Divider(height: 32),
                 ],
 
+                // Sensors
+                if (showSensorsSection) ...[
+                  _SectionHeader(
+                    title: 'Sensors',
+                    count: sensors.length,
+                    icon: Icons.sensors,
+                    trailing: _buildSortMenu(context, ContactSection.sensors),
+                  ),
+                  _buildSectionFilterField(
+                    context,
+                    ContactSection.sensors,
+                    contactsProvider,
+                  ),
+                  ..._buildSavedGroupCards(
+                    visibleSavedSensorGroups,
+                    ContactSection.sensors,
+                  ),
+                  if (sensors.isEmpty &&
+                      _sectionHasActiveFilter(ContactSection.sensors))
+                    _buildNoFilterResults(context)
+                  else
+                    ..._buildContactSectionItems(
+                      _excludeGroupedContacts(
+                        sensors,
+                        visibleSavedSensorGroups,
+                      ),
+                    ),
+                  const Divider(height: 32),
+                ],
+
                 // Rooms
                 if (showRoomsSection) ...[
                   _SectionHeader(
@@ -836,30 +830,13 @@ class _ContactsTabState extends State<ContactsTab> {
                     visibleSavedRoomGroups,
                     ContactSection.rooms,
                   ),
-                  ..._buildContactSectionItems(
-                    _excludeGroupedContacts(rooms, visibleSavedRoomGroups),
-                  ),
-                  const Divider(height: 32),
-                ],
-
-                // Pending adverts are kept below resolved sections while we load details.
-                if (pendingAdverts.isNotEmpty) ...[
-                  _SectionHeader(
-                    title: l10n.pending,
-                    count: pendingAdverts.length,
-                    icon: Icons.person_search,
-                  ),
-                  ...pendingAdverts.map(
-                    (advert) => _PendingAdvertTile(
-                      advert: advert,
-                      subtitle:
-                          '${l10n.publicKey}: ${advert.shortDisplayKey}\n${l10n.lastSeen}: ${_formatRelativeTime(context, advert.receivedAt)}',
-                      isResolving: _resolvingAdvertKeys.contains(
-                        advert.publicKeyHex,
-                      ),
-                      onResolve: () => _handleResolveAdvert(advert),
+                  if (rooms.isEmpty &&
+                      _sectionHasActiveFilter(ContactSection.rooms))
+                    _buildNoFilterResults(context)
+                  else
+                    ..._buildContactSectionItems(
+                      _excludeGroupedContacts(rooms, visibleSavedRoomGroups),
                     ),
-                  ),
                   const Divider(height: 32),
                 ],
 
@@ -879,7 +856,10 @@ class _ContactsTabState extends State<ContactsTab> {
                     visibleSavedChannelGroups,
                     ContactSection.channels,
                   ),
-                  if (filteredChannels.isNotEmpty) ...[
+                  if (filteredChannels.isEmpty &&
+                      _sectionHasActiveFilter(ContactSection.channels))
+                    _buildNoFilterResults(context)
+                  else ...[
                     ..._excludeGroupedContacts(
                       filteredChannels,
                       visibleSavedChannelGroups,
@@ -901,16 +881,36 @@ class _ContactsTabState extends State<ContactsTab> {
                       horizontal: 16,
                       vertical: 8,
                     ),
-                    child: OutlinedButton.icon(
-                      onPressed: () => _showAddChannelDialog(context),
-                      icon: const Icon(Icons.add_circle_outline),
-                      label: Text(l10n.addChannel),
-                      style: OutlinedButton.styleFrom(
-                        padding: const EdgeInsets.symmetric(
-                          horizontal: 24,
-                          vertical: 12,
+                    child: Row(
+                      children: [
+                        Expanded(
+                          child: OutlinedButton.icon(
+                            onPressed: () => _openAddContactScreen(context),
+                            icon: const Icon(Icons.person_add_alt_1_outlined),
+                            label: const Text('Import Contact'),
+                            style: OutlinedButton.styleFrom(
+                              padding: const EdgeInsets.symmetric(
+                                horizontal: 24,
+                                vertical: 12,
+                              ),
+                            ),
+                          ),
                         ),
-                      ),
+                        const SizedBox(width: 12),
+                        Expanded(
+                          child: OutlinedButton.icon(
+                            onPressed: () => _showAddChannelDialog(context),
+                            icon: const Icon(Icons.add_circle_outline),
+                            label: Text(l10n.addChannel),
+                            style: OutlinedButton.styleFrom(
+                              padding: const EdgeInsets.symmetric(
+                                horizontal: 24,
+                                vertical: 12,
+                              ),
+                            ),
+                          ),
+                        ),
+                      ],
                     ),
                   ),
               ],
@@ -921,6 +921,18 @@ class _ContactsTabState extends State<ContactsTab> {
     );
   }
 
+  Widget _buildNoFilterResults(BuildContext context) {
+    return Padding(
+      padding: const EdgeInsets.symmetric(vertical: 16, horizontal: 24),
+      child: Text(
+        'No matches',
+        style: Theme.of(context).textTheme.bodyMedium?.copyWith(
+          color: Theme.of(context).colorScheme.onSurfaceVariant,
+        ),
+      ),
+    );
+  }
+
   List<Widget> _buildContactSectionItems(
     List<Contact> contacts, {
     bool compact = false,
@@ -1250,47 +1262,7 @@ class _ContactsTabState extends State<ContactsTab> {
 
 enum ContactSortMode { lastSeen, distance }
 
-enum ContactSection { teamMembers, repeaters, rooms, channels }
-
-class _PendingAdvertTile extends StatelessWidget {
-  final PendingAdvert advert;
-  final String subtitle;
-  final bool isResolving;
-  final VoidCallback onResolve;
-
-  const _PendingAdvertTile({
-    required this.advert,
-    required this.subtitle,
-    required this.isResolving,
-    required this.onResolve,
-  });
-
-  @override
-  Widget build(BuildContext context) {
-    return Card(
-      margin: const EdgeInsets.only(bottom: 8),
-      child: ListTile(
-        leading: const CircleAvatar(child: Icon(Icons.campaign_outlined)),
-        title: Text(
-          advert.shortDisplayKey,
-          style: const TextStyle(fontWeight: FontWeight.bold),
-        ),
-        subtitle: Text(subtitle),
-        trailing: isResolving
-            ? const SizedBox(
-                width: 18,
-                height: 18,
-                child: CircularProgressIndicator(strokeWidth: 2),
-              )
-            : IconButton(
-                icon: const Icon(Icons.person_add_alt_1),
-                tooltip: 'Resolve contact',
-                onPressed: onResolve,
-              ),
-      ),
-    );
-  }
-}
+enum ContactSection { teamMembers, repeaters, sensors, rooms, channels }
 
 class _RenderedSavedGroup {
   final SavedContactGroup group;

lib/screens/device_config_screen.dart

@@ -1,8 +1,15 @@
+import 'dart:async';
+import 'dart:typed_data';
+
 import 'package:flutter/material.dart';
 import 'package:geolocator/geolocator.dart';
 import 'package:provider/provider.dart';
 import '../models/device_info.dart';
+import '../models/channel.dart';
+import '../models/contact.dart';
+import '../providers/channels_provider.dart';
 import '../providers/connection_provider.dart';
+import '../providers/contacts_provider.dart';
 import '../services/validation_service.dart';
 import '../l10n/app_localizations.dart';
 
@@ -14,6 +21,11 @@ class DeviceConfigScreen extends StatefulWidget {
 }
 
 class _DeviceConfigScreenState extends State<DeviceConfigScreen> {
+  static const int _bulkDeleteBatchSize = 8;
+  static const Duration _bulkDeleteInterItemDelay = Duration(milliseconds: 120);
+  static const Duration _bulkDeleteBatchDelay = Duration(milliseconds: 700);
+  static const Duration _bulkDeleteFinalSyncDelay = Duration(milliseconds: 900);
+  static const int _autoAddFilterModeFlag = 1;
   static const List<_RadioPreset> _radioPresets = [
     _RadioPreset(
       id: 'australia',
@@ -166,16 +178,30 @@ class _DeviceConfigScreenState extends State<DeviceConfigScreen> {
   late TextEditingController _lonController;
   late TextEditingController _freqController;
   late TextEditingController _txPowerController;
+  late final ConnectionProvider _connectionProvider;
 
   bool _telemetryEnabled = false;
   bool _repeatEnabled = false;
+  bool _autoAddDiscoveredContactsEnabled = true;
+  bool _autoAddUsersEnabled = true;
+  bool _autoAddRepeatersEnabled = true;
+  bool _autoAddRoomServersEnabled = true;
+  bool _autoAddSensorsEnabled = true;
+  bool _overwriteOldestAutoAddEnabled = false;
   bool _showCustomRadioSettings = false;
   bool _isSavingPublicInfo = false;
   bool _isSavingRadioSettings = false;
+  bool _isSavingAutoDiscoverySettings = false;
+  bool _isClearingContacts = false;
+  bool _isClearingChannels = false;
   bool _publicInfoSaved = false;
   bool _radioSettingsSaved = false;
+  bool _autoDiscoverySettingsSaved = false;
+  bool _autoDiscoverySettingsDirty = false;
+  String? _lastAutoDiscoverySignature;
   String? _publicInfoError;
   String? _radioSettingsError;
+  String? _autoDiscoverySettingsError;
   String _selectedBandwidth = '62.5 kHz';
   int _selectedSpreadingFactor = 8;
   int _selectedCodingRate = 8;
@@ -197,7 +223,9 @@ class _DeviceConfigScreenState extends State<DeviceConfigScreen> {
   @override
   void initState() {
     super.initState();
-    final deviceInfo = context.read<ConnectionProvider>().deviceInfo;
+    _connectionProvider = context.read<ConnectionProvider>();
+    _connectionProvider.addListener(_handleConnectionProviderChanged);
+    final deviceInfo = _connectionProvider.deviceInfo;
 
     _nameController = TextEditingController(
       text: deviceInfo.selfName ?? deviceInfo.deviceName ?? '',
@@ -252,6 +280,8 @@ class _DeviceConfigScreenState extends State<DeviceConfigScreen> {
 
     // Initialize repeat mode from device info (firmware v9+)
     _repeatEnabled = deviceInfo.clientRepeat ?? false;
+    _syncAutoDiscoveryState(deviceInfo);
+    _lastAutoDiscoverySignature = _autoDiscoverySignature(deviceInfo);
 
     // Fetch allowed repeat frequencies on open if device supports repeat mode
     if (deviceInfo.clientRepeat != null &&
@@ -262,12 +292,14 @@ class _DeviceConfigScreenState extends State<DeviceConfigScreen> {
     }
 
     WidgetsBinding.instance.addPostFrameCallback((_) {
-      context.read<ConnectionProvider>().getBatteryAndStorage();
+      _connectionProvider.getBatteryAndStorage();
+      unawaited(_connectionProvider.getAutoaddConfig());
     });
   }
 
   @override
   void dispose() {
+    _connectionProvider.removeListener(_handleConnectionProviderChanged);
     _nameController.dispose();
     _latController.dispose();
     _lonController.dispose();
@@ -375,9 +407,83 @@ class _DeviceConfigScreenState extends State<DeviceConfigScreen> {
     }
   }
 
+  void _markAutoDiscoverySettingsDirty() {
+    _autoDiscoverySettingsDirty = true;
+    if (_autoDiscoverySettingsSaved || _autoDiscoverySettingsError != null) {
+      setState(() {
+        _autoDiscoverySettingsSaved = false;
+        _autoDiscoverySettingsError = null;
+      });
+    }
+  }
+
+  String _autoDiscoverySignature(DeviceInfo deviceInfo) {
+    return [
+      deviceInfo.manualAddContacts,
+      deviceInfo.autoAddUsers,
+      deviceInfo.autoAddRepeaters,
+      deviceInfo.autoAddRoomServers,
+      deviceInfo.autoAddSensors,
+      deviceInfo.autoAddOverwriteOldest,
+    ].join('|');
+  }
+
+  void _handleConnectionProviderChanged() {
+    if (!mounted || _autoDiscoverySettingsDirty) return;
+
+    final deviceInfo = _connectionProvider.deviceInfo;
+    final nextSignature = _autoDiscoverySignature(deviceInfo);
+    if (nextSignature == _lastAutoDiscoverySignature) return;
+
+    _lastAutoDiscoverySignature = nextSignature;
+    setState(() {
+      _syncAutoDiscoveryState(deviceInfo);
+    });
+  }
+
+  bool _hasAutoAddTargetsEnabled(DeviceInfo deviceInfo) {
+    return (deviceInfo.autoAddUsers ?? false) ||
+        (deviceInfo.autoAddRepeaters ?? false) ||
+        (deviceInfo.autoAddRoomServers ?? false) ||
+        (deviceInfo.autoAddSensors ?? false);
+  }
+
+  void _syncAutoDiscoveryState(DeviceInfo deviceInfo) {
+    final hasFetchedAutoAddConfig =
+        deviceInfo.autoAddUsers != null ||
+        deviceInfo.autoAddRepeaters != null ||
+        deviceInfo.autoAddRoomServers != null ||
+        deviceInfo.autoAddSensors != null ||
+        deviceInfo.autoAddOverwriteOldest != null;
+
+    _autoAddDiscoveredContactsEnabled = hasFetchedAutoAddConfig
+        ? _hasAutoAddTargetsEnabled(deviceInfo)
+        : !(deviceInfo.manualAddContacts ?? false);
+    _autoAddUsersEnabled = deviceInfo.autoAddUsers ?? true;
+    _autoAddRepeatersEnabled = deviceInfo.autoAddRepeaters ?? true;
+    _autoAddRoomServersEnabled = deviceInfo.autoAddRoomServers ?? true;
+    _autoAddSensorsEnabled = deviceInfo.autoAddSensors ?? true;
+    _overwriteOldestAutoAddEnabled = deviceInfo.autoAddOverwriteOldest ?? false;
+  }
+
+  int _telemetryModesForSave(ConnectionProvider connectionProvider) {
+    final deviceInfo = connectionProvider.deviceInfo;
+    final telemetryEnabled =
+        (deviceInfo.advLat != null && deviceInfo.advLat != 0) ||
+        (deviceInfo.advLon != null && deviceInfo.advLon != 0);
+    return deviceInfo.telemetryModes ?? (telemetryEnabled ? 0x0A : 0x00);
+  }
+
+  int _advertLocationPolicyForSave(ConnectionProvider connectionProvider) {
+    final deviceInfo = connectionProvider.deviceInfo;
+    final telemetryEnabled =
+        (deviceInfo.advLat != null && deviceInfo.advLat != 0) ||
+        (deviceInfo.advLon != null && deviceInfo.advLon != 0);
+    return deviceInfo.advertLocPolicy ?? (telemetryEnabled ? 1 : 0);
+  }
+
   Future<void> _savePublicInfo() async {
     final connectionProvider = context.read<ConnectionProvider>();
-    final deviceInfo = connectionProvider.deviceInfo;
     final validator = ValidationService();
 
     setState(() {
@@ -425,7 +531,7 @@ class _DeviceConfigScreenState extends State<DeviceConfigScreen> {
         // Set telemetry modes to "Allow All" (mode 2 for both base and location)
         final telemetryModes = 0x0A; // binary: 00001010 (base=2, location=2)
         await connectionProvider.setOtherParams(
-          manualAddContacts: deviceInfo.manualAddContacts == true ? 1 : 0,
+          manualAddContacts: _autoAddFilterModeFlag,
           telemetryModes: telemetryModes,
           advertLocationPolicy: 1,
         );
@@ -436,7 +542,7 @@ class _DeviceConfigScreenState extends State<DeviceConfigScreen> {
         // Set telemetry modes to "Deny" (mode 0)
         final telemetryModes = 0x00;
         await connectionProvider.setOtherParams(
-          manualAddContacts: deviceInfo.manualAddContacts == true ? 1 : 0,
+          manualAddContacts: _autoAddFilterModeFlag,
           telemetryModes: telemetryModes,
           advertLocationPolicy: 0,
         );
@@ -537,6 +643,64 @@ class _DeviceConfigScreenState extends State<DeviceConfigScreen> {
     }
   }
 
+  Future<void> _saveAutoDiscoverySettings() async {
+    final connectionProvider = context.read<ConnectionProvider>();
+    final autoAddUsers =
+        _autoAddDiscoveredContactsEnabled && _autoAddUsersEnabled;
+    final autoAddRepeaters =
+        _autoAddDiscoveredContactsEnabled && _autoAddRepeatersEnabled;
+    final autoAddRoomServers =
+        _autoAddDiscoveredContactsEnabled && _autoAddRoomServersEnabled;
+    final autoAddSensors =
+        _autoAddDiscoveredContactsEnabled && _autoAddSensorsEnabled;
+    final overwriteOldest =
+        _autoAddDiscoveredContactsEnabled && _overwriteOldestAutoAddEnabled;
+
+    setState(() {
+      _isSavingAutoDiscoverySettings = true;
+      _autoDiscoverySettingsSaved = false;
+      _autoDiscoverySettingsError = null;
+    });
+
+    try {
+      await connectionProvider.setAutoaddConfig(
+        autoAddUsers: autoAddUsers,
+        autoAddRepeaters: autoAddRepeaters,
+        autoAddRoomServers: autoAddRoomServers,
+        autoAddSensors: autoAddSensors,
+        overwriteOldest: overwriteOldest,
+      );
+      await connectionProvider.setOtherParams(
+        manualAddContacts: _autoAddFilterModeFlag,
+        telemetryModes: _telemetryModesForSave(connectionProvider),
+        advertLocationPolicy: _advertLocationPolicyForSave(connectionProvider),
+        multiAcks: connectionProvider.deviceInfo.multiAcks ?? 0,
+      );
+      await connectionProvider.getAutoaddConfig();
+
+      if (mounted) {
+        setState(() {
+          _syncAutoDiscoveryState(connectionProvider.deviceInfo);
+          _lastAutoDiscoverySignature = _autoDiscoverySignature(
+            connectionProvider.deviceInfo,
+          );
+          _isSavingAutoDiscoverySettings = false;
+          _autoDiscoverySettingsSaved = true;
+          _autoDiscoverySettingsDirty = false;
+        });
+      }
+    } catch (e) {
+      if (mounted) {
+        setState(() {
+          _isSavingAutoDiscoverySettings = false;
+          _autoDiscoverySettingsError = AppLocalizations.of(
+            context,
+          )!.failedToSave(e.toString());
+        });
+      }
+    }
+  }
+
   Future<void> _useCurrentLocation() async {
     try {
       bool serviceEnabled = await Geolocator.isLocationServiceEnabled();
@@ -687,6 +851,205 @@ class _DeviceConfigScreenState extends State<DeviceConfigScreen> {
     }
   }
 
+  Future<void> _confirmClearAllContacts() async {
+    final contacts = context
+        .read<ContactsProvider>()
+        .contacts
+        .where((contact) => !contact.isChannel)
+        .toList();
+    if (contacts.isEmpty) {
+      ScaffoldMessenger.of(context).showSnackBar(
+        const SnackBar(content: Text('No device contacts to clear.')),
+      );
+      return;
+    }
+
+    final confirmed = await showDialog<bool>(
+      context: context,
+      builder: (dialogContext) => AlertDialog(
+        title: const Text('Clear all contacts'),
+        content: Text(
+          'This will remove ${contacts.length} contact${contacts.length == 1 ? '' : 's'} from the connected device. Channels and radio settings will not be changed.',
+        ),
+        actions: [
+          TextButton(
+            onPressed: () => Navigator.of(dialogContext).pop(false),
+            child: Text(AppLocalizations.of(context)!.cancel),
+          ),
+          FilledButton(
+            style: FilledButton.styleFrom(
+              backgroundColor: Theme.of(context).colorScheme.error,
+              foregroundColor: Theme.of(context).colorScheme.onError,
+            ),
+            onPressed: () => Navigator.of(dialogContext).pop(true),
+            child: const Text('Clear contacts'),
+          ),
+        ],
+      ),
+    );
+
+    if (confirmed != true || !mounted) return;
+
+    final messenger = ScaffoldMessenger.of(context);
+    final connectionProvider = context.read<ConnectionProvider>();
+    final contactsProvider = context.read<ContactsProvider>();
+    connectionProvider.clearError();
+
+    setState(() {
+      _isClearingContacts = true;
+    });
+
+    try {
+      var processed = 0;
+      for (final contact in List<Contact>.from(contacts)) {
+        await contactsProvider.removeContact(
+          contact.publicKeyHex,
+          onRemoveFromDevice: connectionProvider.removeContact,
+        );
+        processed++;
+        await Future.delayed(_bulkDeleteInterItemDelay);
+        if (processed % _bulkDeleteBatchSize == 0) {
+          await Future.delayed(_bulkDeleteBatchDelay);
+        }
+      }
+
+      // Flush the updated local contact set to storage immediately.
+      await contactsProvider.persistNow();
+      await Future.delayed(_bulkDeleteFinalSyncDelay);
+      await connectionProvider.getContacts();
+      if (connectionProvider.error != null) {
+        throw Exception(connectionProvider.error!);
+      }
+
+      if (!mounted) return;
+      messenger.showSnackBar(
+        SnackBar(
+          content: Text(
+            'Cleared ${contacts.length} contact${contacts.length == 1 ? '' : 's'} from the device.',
+          ),
+        ),
+      );
+    } catch (e) {
+      if (!mounted) return;
+      messenger.showSnackBar(
+        SnackBar(
+          content: Text('Failed to clear contacts: $e'),
+          backgroundColor: Theme.of(context).colorScheme.error,
+        ),
+      );
+    } finally {
+      if (mounted) {
+        setState(() {
+          _isClearingContacts = false;
+        });
+      }
+    }
+  }
+
+  Future<void> _confirmClearAllChannels() async {
+    final channels = context
+        .read<ChannelsProvider>()
+        .channels
+        .where((channel) => !channel.isPublicChannel && channel.name.isNotEmpty)
+        .toList();
+    if (channels.isEmpty) {
+      ScaffoldMessenger.of(context).showSnackBar(
+        const SnackBar(content: Text('No custom channels to clear.')),
+      );
+      return;
+    }
+
+    final confirmed = await showDialog<bool>(
+      context: context,
+      builder: (dialogContext) => AlertDialog(
+        title: const Text('Clear all channels'),
+        content: Text(
+          'This will remove ${channels.length} custom channel${channels.length == 1 ? '' : 's'} from the connected device. Contacts and radio settings will not be changed.',
+        ),
+        actions: [
+          TextButton(
+            onPressed: () => Navigator.of(dialogContext).pop(false),
+            child: Text(AppLocalizations.of(context)!.cancel),
+          ),
+          FilledButton(
+            style: FilledButton.styleFrom(
+              backgroundColor: Theme.of(context).colorScheme.error,
+              foregroundColor: Theme.of(context).colorScheme.onError,
+            ),
+            onPressed: () => Navigator.of(dialogContext).pop(true),
+            child: const Text('Clear channels'),
+          ),
+        ],
+      ),
+    );
+
+    if (confirmed != true || !mounted) return;
+
+    final messenger = ScaffoldMessenger.of(context);
+    final connectionProvider = context.read<ConnectionProvider>();
+    final channelsProvider = context.read<ChannelsProvider>();
+    final contactsProvider = context.read<ContactsProvider>();
+    connectionProvider.clearError();
+
+    setState(() {
+      _isClearingChannels = true;
+    });
+
+    try {
+      var processed = 0;
+      for (final channel in List<Channel>.from(channels)) {
+        await connectionProvider.deleteChannel(channel.index);
+        processed++;
+        await Future.delayed(_bulkDeleteInterItemDelay);
+        if (processed % _bulkDeleteBatchSize == 0) {
+          await Future.delayed(_bulkDeleteBatchDelay);
+        }
+      }
+
+      // Force local channel/contact cache cleanup before the device resync.
+      for (final channel in channels) {
+        channelsProvider.removeChannel(channel.index);
+        final publicKeyBytes = Uint8List(32);
+        publicKeyBytes[0] = 0xFF;
+        publicKeyBytes[1] = channel.index;
+        final publicKeyHex = publicKeyBytes
+            .map((b) => b.toRadixString(16).padLeft(2, '0'))
+            .join('');
+        await contactsProvider.removeContact(publicKeyHex);
+      }
+
+      await contactsProvider.persistNow();
+      await Future.delayed(_bulkDeleteFinalSyncDelay);
+      await connectionProvider.syncChannels();
+      if (connectionProvider.error != null) {
+        throw Exception(connectionProvider.error!);
+      }
+
+      if (!mounted) return;
+      messenger.showSnackBar(
+        SnackBar(
+          content: Text(
+            'Cleared ${channels.length} custom channel${channels.length == 1 ? '' : 's'} from the device.',
+          ),
+        ),
+      );
+    } catch (e) {
+      if (!mounted) return;
+      messenger.showSnackBar(
+        SnackBar(
+          content: Text('Failed to clear channels: $e'),
+          backgroundColor: Theme.of(context).colorScheme.error,
+        ),
+      );
+    } finally {
+      if (mounted) {
+        setState(() {
+          _isClearingChannels = false;
+        });
+      }
+    }
+  }
+
   @override
   Widget build(BuildContext context) {
     final deviceInfo = context.watch<ConnectionProvider>().deviceInfo;
@@ -781,6 +1144,164 @@ class _DeviceConfigScreenState extends State<DeviceConfigScreen> {
                 ),
               ),
               const SizedBox(height: 20),
+              _ConfigSectionCard(
+                title: 'Auto discovery',
+                subtitle:
+                    'Control how the radio auto-adds discovered nodes to its contacts table.',
+                icon: Icons.person_search_rounded,
+                child: Column(
+                  crossAxisAlignment: CrossAxisAlignment.start,
+                  children: [
+                    _SettingHighlightCard(
+                      icon: _autoAddDiscoveredContactsEnabled
+                          ? Icons.person_add_alt_1
+                          : Icons.person_add_disabled,
+                      title: 'Enable automatic adding',
+                      description:
+                          'Turn this off to keep discoveries manual-only on the radio.',
+                      accentColor: _autoAddDiscoveredContactsEnabled
+                          ? colorScheme.primary
+                          : colorScheme.onSurfaceVariant,
+                      trailing: Switch(
+                        value: _autoAddDiscoveredContactsEnabled,
+                        onChanged: (value) {
+                          setState(() {
+                            _autoAddDiscoveredContactsEnabled = value;
+                            _markAutoDiscoverySettingsDirty();
+                          });
+                        },
+                      ),
+                    ),
+                    const SizedBox(height: 18),
+                    _SettingHighlightCard(
+                      icon: Icons.person_outline_rounded,
+                      title: 'Auto-add users',
+                      description:
+                          'Automatically store discovered user/chat nodes.',
+                      accentColor: _autoAddUsersEnabled
+                          ? colorScheme.primary
+                          : colorScheme.onSurfaceVariant,
+                      trailing: Switch(
+                        value: _autoAddUsersEnabled,
+                        onChanged: _autoAddDiscoveredContactsEnabled
+                            ? (value) {
+                                setState(() {
+                                  _autoAddUsersEnabled = value;
+                                  _markAutoDiscoverySettingsDirty();
+                                });
+                              }
+                            : null,
+                      ),
+                    ),
+                    const SizedBox(height: 14),
+                    _SettingHighlightCard(
+                      icon: Icons.router_outlined,
+                      title: 'Auto-add repeaters',
+                      description:
+                          'Automatically store discovered repeater nodes.',
+                      accentColor: _autoAddRepeatersEnabled
+                          ? colorScheme.primary
+                          : colorScheme.onSurfaceVariant,
+                      trailing: Switch(
+                        value: _autoAddRepeatersEnabled,
+                        onChanged: _autoAddDiscoveredContactsEnabled
+                            ? (value) {
+                                setState(() {
+                                  _autoAddRepeatersEnabled = value;
+                                  _markAutoDiscoverySettingsDirty();
+                                });
+                              }
+                            : null,
+                      ),
+                    ),
+                    const SizedBox(height: 14),
+                    _SettingHighlightCard(
+                      icon: Icons.meeting_room_outlined,
+                      title: 'Auto-add room servers',
+                      description:
+                          'Automatically store discovered room/server nodes.',
+                      accentColor: _autoAddRoomServersEnabled
+                          ? colorScheme.primary
+                          : colorScheme.onSurfaceVariant,
+                      trailing: Switch(
+                        value: _autoAddRoomServersEnabled,
+                        onChanged: _autoAddDiscoveredContactsEnabled
+                            ? (value) {
+                                setState(() {
+                                  _autoAddRoomServersEnabled = value;
+                                  _markAutoDiscoverySettingsDirty();
+                                });
+                              }
+                            : null,
+                      ),
+                    ),
+                    const SizedBox(height: 14),
+                    _SettingHighlightCard(
+                      icon: Icons.sensors_outlined,
+                      title: 'Auto-add sensors',
+                      description:
+                          'Automatically store discovered sensor nodes.',
+                      accentColor: _autoAddSensorsEnabled
+                          ? colorScheme.primary
+                          : colorScheme.onSurfaceVariant,
+                      trailing: Switch(
+                        value: _autoAddSensorsEnabled,
+                        onChanged: _autoAddDiscoveredContactsEnabled
+                            ? (value) {
+                                setState(() {
+                                  _autoAddSensorsEnabled = value;
+                                  _markAutoDiscoverySettingsDirty();
+                                });
+                              }
+                            : null,
+                      ),
+                    ),
+                    const SizedBox(height: 14),
+                    _SettingHighlightCard(
+                      icon: Icons.history_toggle_off_rounded,
+                      title: 'Overwrite oldest when full',
+                      description:
+                          'Allow the radio to replace the oldest contact when storage is full.',
+                      accentColor: _overwriteOldestAutoAddEnabled
+                          ? colorScheme.primary
+                          : colorScheme.onSurfaceVariant,
+                      trailing: Switch(
+                        value: _overwriteOldestAutoAddEnabled,
+                        onChanged: _autoAddDiscoveredContactsEnabled
+                            ? (value) {
+                                setState(() {
+                                  _overwriteOldestAutoAddEnabled = value;
+                                  _markAutoDiscoverySettingsDirty();
+                                });
+                              }
+                            : null,
+                      ),
+                    ),
+                    const SizedBox(height: 18),
+                    if (_autoDiscoverySettingsError != null) ...[
+                      Text(
+                        _autoDiscoverySettingsError!,
+                        style: theme.textTheme.bodySmall?.copyWith(
+                          color: colorScheme.error,
+                        ),
+                      ),
+                      const SizedBox(height: 10),
+                    ],
+                    SizedBox(
+                      width: double.infinity,
+                      child: _SaveActionButton(
+                        onPressed: _isSavingAutoDiscoverySettings
+                            ? null
+                            : _saveAutoDiscoverySettings,
+                        isSaving: _isSavingAutoDiscoverySettings,
+                        isSaved: _autoDiscoverySettingsSaved,
+                        label: 'Save discovery settings',
+                      ),
+                    ),
+                  ],
+                ),
+              ),
+              const SizedBox(height: 20),
               _ConfigSectionCard(
                 title: AppLocalizations.of(context)!.publicInfo,
                 subtitle: 'Choose the name and location this device shares.',
@@ -1230,10 +1751,60 @@ class _DeviceConfigScreenState extends State<DeviceConfigScreen> {
                       ),
                     ),
                     const SizedBox(height: 16),
+                    SizedBox(
+                      width: double.infinity,
+                      child: OutlinedButton.icon(
+                        onPressed: _isClearingContacts || _isClearingChannels
+                            ? null
+                            : _confirmClearAllContacts,
+                        style: OutlinedButton.styleFrom(
+                          foregroundColor: colorScheme.error,
+                          side: BorderSide(color: colorScheme.error),
+                          minimumSize: const Size.fromHeight(52),
+                        ),
+                        icon: _isClearingContacts
+                            ? const SizedBox(
+                                width: 18,
+                                height: 18,
+                                child: CircularProgressIndicator(
+                                  strokeWidth: 2,
+                                ),
+                              )
+                            : const Icon(Icons.people_alt_outlined),
+                        label: const Text('Clear all contacts'),
+                      ),
+                    ),
+                    const SizedBox(height: 12),
+                    SizedBox(
+                      width: double.infinity,
+                      child: OutlinedButton.icon(
+                        onPressed: _isClearingContacts || _isClearingChannels
+                            ? null
+                            : _confirmClearAllChannels,
+                        style: OutlinedButton.styleFrom(
+                          foregroundColor: colorScheme.error,
+                          side: BorderSide(color: colorScheme.error),
+                          minimumSize: const Size.fromHeight(52),
+                        ),
+                        icon: _isClearingChannels
+                            ? const SizedBox(
+                                width: 18,
+                                height: 18,
+                                child: CircularProgressIndicator(
+                                  strokeWidth: 2,
+                                ),
+                              )
+                            : const Icon(Icons.forum_outlined),
+                        label: const Text('Clear all channels'),
+                      ),
+                    ),
+                    const SizedBox(height: 12),
                     SizedBox(
                       width: double.infinity,
                       child: FilledButton.icon(
-                        onPressed: _confirmFactoryReset,
+                        onPressed: _isClearingContacts || _isClearingChannels
+                            ? null
+                            : _confirmFactoryReset,
                         style: FilledButton.styleFrom(
                           backgroundColor: colorScheme.error,
                           foregroundColor: colorScheme.onError,

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

@@ -12,6 +12,7 @@ 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';
@@ -712,6 +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(
@@ -768,7 +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) {

lib/screens/live_traffic_screen.dart

@@ -1,4 +1,5 @@
 import 'dart:async';
+import 'package:crypto/crypto.dart';
 import 'package:flutter/material.dart';
 import 'package:geolocator/geolocator.dart';
 import 'package:provider/provider.dart';
@@ -11,6 +12,8 @@ import '../services/live_traffic_summary.dart';
 import '../services/location_tracking_service.dart';
 import '../services/route_hash_preferences.dart';
 import '../utils/log_rx_route_decoder.dart';
+import '../widgets/compact_signal_indicator.dart';
+import '../widgets/messages/message_trace_sheet.dart';
 import 'packet_log_screen.dart';
 
 T? _maybeProvider<T>(BuildContext context) {
@@ -134,11 +137,12 @@ class _LiveTrafficScreenState extends State<LiveTrafficScreen> {
     final routeHashCounts = _RouteHashCounts.fromContacts(
       contactsProvider?.contacts ?? const <Contact>[],
     );
-    final packetTypes = unfilteredSnapshot.visibleEntries
-        .map((entry) => entry.payloadLabel)
-        .toSet()
-        .toList()
-      ..sort();
+    final packetTypes =
+        unfilteredSnapshot.visibleEntries
+            .map((entry) => entry.payloadLabel)
+            .toSet()
+            .toList()
+          ..sort();
     final filteredEntries = snapshot.visibleEntries;
 
     return Scaffold(
@@ -202,7 +206,9 @@ class _LiveTrafficScreenState extends State<LiveTrafficScreen> {
                       Icon(
                         Icons.radar_rounded,
                         size: 64,
-                        color: theme.colorScheme.primary.withValues(alpha: 0.45),
+                        color: theme.colorScheme.primary.withValues(
+                          alpha: 0.45,
+                        ),
                       ),
                       const SizedBox(height: 16),
                       const Text(
@@ -218,7 +224,9 @@ class _LiveTrafficScreenState extends State<LiveTrafficScreen> {
                             ? 'This view only shows in-memory traffic while it is active.'
                             : 'Try a different packet type or switch back to All.',
                         textAlign: TextAlign.center,
-                        style: TextStyle(color: theme.colorScheme.onSurfaceVariant),
+                        style: TextStyle(
+                          color: theme.colorScheme.onSurfaceVariant,
+                        ),
                       ),
                     ],
                   ),
@@ -488,7 +496,9 @@ class _FilterChip extends StatelessWidget {
         decoration: BoxDecoration(
           color: color.withValues(alpha: selected ? 0.14 : 0.08),
           borderRadius: BorderRadius.circular(999),
-          border: Border.all(color: color.withValues(alpha: selected ? 0.45 : 0.22)),
+          border: Border.all(
+            color: color.withValues(alpha: selected ? 0.45 : 0.22),
+          ),
         ),
         child: Text(
           label,
@@ -641,103 +651,103 @@ class _LiveTrafficCard extends StatelessWidget {
     final isRx = log.direction == PacketDirection.rx;
     final accent = isRx ? Colors.green : Colors.blue;
     final rxInfo = log.logRxDataInfo;
-    final routePreview = _resolvedRoutePreview(context, entry);
     final originDistance = _originDistanceLabel(context, entry);
+    final packetDetails = _LiveTrafficPacketDetails.fromEntry(entry);
+    final signalMetric = SignalMetric.fromRxInfo(rxInfo);
 
-    return Container(
-      padding: const EdgeInsets.all(14),
-      decoration: BoxDecoration(
-        color: Theme.of(context).colorScheme.surfaceContainerLow,
+    return Material(
+      color: Colors.transparent,
+      child: InkWell(
+        onTap: () => _showPacketBytesSheet(context, log.rawData),
+        onLongPress: () => _showTraceSheet(context, entry),
         borderRadius: BorderRadius.circular(18),
-        border: Border.all(color: accent.withValues(alpha: 0.25)),
-      ),
-      child: Column(
-        crossAxisAlignment: CrossAxisAlignment.start,
-        children: [
-          Row(
+        child: Container(
+          padding: const EdgeInsets.all(14),
+          decoration: BoxDecoration(
+            color: Theme.of(context).colorScheme.surfaceContainerLow,
+            borderRadius: BorderRadius.circular(18),
+            border: Border.all(color: accent.withValues(alpha: 0.25)),
+          ),
+          child: Column(
+            crossAxisAlignment: CrossAxisAlignment.start,
             children: [
-              Container(
-                padding: const EdgeInsets.symmetric(horizontal: 10, vertical: 6),
-                decoration: BoxDecoration(
-                  color: accent.withValues(alpha: 0.14),
-                  borderRadius: BorderRadius.circular(999),
-                ),
-                child: Text(
-                  isRx ? 'RX' : 'TX',
-                  style: TextStyle(
-                    color: accent,
-                    fontWeight: FontWeight.w800,
-                    fontSize: 12,
-                  ),
-                ),
-              ),
-              const SizedBox(width: 8),
-              Expanded(
-                child: Column(
-                  crossAxisAlignment: CrossAxisAlignment.start,
-                  children: [
-                    Text(
-                      entry.payloadLabel,
-                      style: const TextStyle(
-                        fontSize: 16,
-                        fontWeight: FontWeight.w700,
+              Row(
+                children: [
+                  Container(
+                    padding: const EdgeInsets.symmetric(
+                      horizontal: 10,
+                      vertical: 6,
+                    ),
+                    decoration: BoxDecoration(
+                      color: accent.withValues(alpha: 0.14),
+                      borderRadius: BorderRadius.circular(999),
+                    ),
+                    child: Text(
+                      isRx ? 'RX' : 'TX',
+                      style: TextStyle(
+                        color: accent,
+                        fontWeight: FontWeight.w800,
+                        fontSize: 12,
                       ),
                     ),
-                    if (entry.payloadMeaning != null)
-                      Text(
-                        entry.payloadMeaning!,
-                        maxLines: 1,
-                        overflow: TextOverflow.ellipsis,
-                        style: TextStyle(
-                          fontSize: 11,
-                          color: Theme.of(context).colorScheme.onSurfaceVariant,
+                  ),
+                  const SizedBox(width: 8),
+                  Expanded(
+                    child: Column(
+                      crossAxisAlignment: CrossAxisAlignment.start,
+                      children: [
+                        Text(
+                          packetDetails.title,
+                          style: const TextStyle(
+                            fontSize: 16,
+                            fontWeight: FontWeight.w700,
+                          ),
                         ),
+                        if (entry.payloadMeaning != null)
+                          Text(
+                            entry.payloadMeaning!,
+                            maxLines: 1,
+                            overflow: TextOverflow.ellipsis,
+                            style: TextStyle(
+                              fontSize: 11,
+                              color: Theme.of(
+                                context,
+                              ).colorScheme.onSurfaceVariant,
+                            ),
+                          ),
+                      ],
+                    ),
+                  ),
+                  if (signalMetric != null) ...[
+                    const SizedBox(width: 12),
+                    CompactSignalIndicator(metric: signalMetric),
+                  ] else
+                    Text(
+                      _timeAgo(log.timestamp, now),
+                      style: TextStyle(
+                        fontSize: 12,
+                        color: Theme.of(context).colorScheme.onSurfaceVariant,
                       ),
-                  ],
-                ),
+                    ),
+                ],
               ),
-              Text(
-                _timeAgo(log.timestamp, now),
-                style: TextStyle(
-                  fontSize: 12,
-                  color: Theme.of(context).colorScheme.onSurfaceVariant,
-                ),
+              const SizedBox(height: 10),
+              _PacketInfoLine(
+                text:
+                    '${_formatClock(log.timestamp)} • Size: ${log.rawData.length} bytes',
               ),
-            ],
-          ),
-          const SizedBox(height: 10),
-          Wrap(
-            spacing: 8,
-            runSpacing: 8,
-            children: [
-              _PacketMetaChip(
-                label: '${log.rawData.length} bytes',
-                onTap: () => _showPacketBytesSheet(context, log.rawData),
-              ),
-              if (rxInfo?.rssiDbm != null)
-                _PacketMetaChip(label: 'RSSI ${rxInfo!.rssiDbm} dBm'),
-              if (rxInfo?.snrDb != null)
-                _PacketMetaChip(
-                  label: 'SNR ${rxInfo!.snrDb!.toStringAsFixed(1)} dB',
-                ),
-              if (entry.hopCount != null)
-                _PacketMetaChip(label: '${entry.hopCount} hops'),
-              if (entry.isMultiHop)
-                const _PacketMetaChip(label: 'MULTI-HOP', emphasized: true),
+              _PacketInfoLine(text: 'Hash: ${packetDetails.packetHashHex}'),
+              if (packetDetails.pathLine != null)
+                _PacketInfoLine(text: packetDetails.pathLine!),
+              if (packetDetails.pathHashLine != null)
+                _PacketInfoLine(text: packetDetails.pathHashLine!),
+              if (packetDetails.endpointLine != null)
+                _PacketInfoLine(text: packetDetails.endpointLine!),
               if (originDistance != null)
-                _PacketMetaChip(label: 'Origin $originDistance'),
+                _PacketInfoLine(text: 'Origin: $originDistance'),
             ],
           ),
-          const SizedBox(height: 10),
-          Text(
-            routePreview,
-            style: TextStyle(
-              fontSize: 12,
-              fontFamily: 'monospace',
-              color: Theme.of(context).colorScheme.onSurfaceVariant,
-            ),
-          ),
-        ],
+        ),
       ),
     );
   }
@@ -748,36 +758,11 @@ class _LiveTrafficCard extends StatelessWidget {
     return '${diff.inMinutes}m ago';
   }
 
-  static String _resolvedRoutePreview(
-    BuildContext context,
-    LiveTrafficEntry entry,
-  ) {
-    final route = entry.route;
-    if (route == null || route.hopHashes.isEmpty) {
-      return entry.routePreview;
-    }
-
-    final contactsProvider = _maybeProvider<ContactsProvider>(context);
-    final connectionProvider = _maybeProvider<ConnectionProvider>(context);
-    if (contactsProvider == null && connectionProvider == null) {
-      return entry.routePreview;
-    }
-    final ownLatLng = _ownLatLng(connectionProvider);
-
-    final resolvedLabels = route.hopHashes.map((hashHex) {
-      final resolved = LogRxRouteDecoder.resolveHash(
-        hashHex,
-        contacts: contactsProvider?.contacts ?? const <Contact>[],
-        ownPublicKey: connectionProvider?.deviceInfo.publicKey,
-        ownName:
-            connectionProvider?.deviceInfo.selfName ??
-            connectionProvider?.deviceInfo.displayName,
-        ownLatitude: ownLatLng?.latitude,
-        ownLongitude: ownLatLng?.longitude,
-      );
-      return _compactNodeLabel(resolved);
-    }).toList();
-    return resolvedLabels.join(' -> ');
+  static String _formatClock(DateTime timestamp) {
+    final hour = timestamp.hour.toString().padLeft(2, '0');
+    final minute = timestamp.minute.toString().padLeft(2, '0');
+    final second = timestamp.second.toString().padLeft(2, '0');
+    return '$hour:$minute:$second';
   }
 
   static String? _originDistanceLabel(
@@ -856,11 +841,16 @@ class _LiveTrafficCard extends StatelessWidget {
       final hex = chunk
           .map((byte) => byte.toRadixString(16).padLeft(2, '0').toUpperCase())
           .join(' ');
-      hexLines.add('${offset.toRadixString(16).padLeft(4, '0').toUpperCase()}: $hex');
+      hexLines.add(
+        '${offset.toRadixString(16).padLeft(4, '0').toUpperCase()}: $hex',
+      );
     }
 
     final ascii = data
-        .map((byte) => (byte >= 32 && byte <= 126) ? String.fromCharCode(byte) : '.')
+        .map(
+          (byte) =>
+              (byte >= 32 && byte <= 126) ? String.fromCharCode(byte) : '.',
+        )
         .join();
 
     return showModalBottomSheet<void>(
@@ -886,10 +876,7 @@ class _LiveTrafficCard extends StatelessWidget {
                     style: TextStyle(color: scheme.onSurfaceVariant),
                   ),
                   const SizedBox(height: 16),
-                  Text(
-                    'Hex',
-                    style: Theme.of(context).textTheme.titleSmall,
-                  ),
+                  Text('Hex', style: Theme.of(context).textTheme.titleSmall),
                   const SizedBox(height: 8),
                   Container(
                     width: double.infinity,
@@ -909,10 +896,7 @@ class _LiveTrafficCard extends StatelessWidget {
                     ),
                   ),
                   const SizedBox(height: 16),
-                  Text(
-                    'ASCII',
-                    style: Theme.of(context).textTheme.titleSmall,
-                  ),
+                  Text('ASCII', style: Theme.of(context).textTheme.titleSmall),
                   const SizedBox(height: 8),
                   Container(
                     width: double.infinity,
@@ -940,17 +924,187 @@ class _LiveTrafficCard extends StatelessWidget {
     );
   }
 
-  static String _compactNodeLabel(ResolvedNodeHash node) {
-    if (node.isOwnNode) {
-      return node.label;
+  static Future<void> _showTraceSheet(
+    BuildContext context,
+    LiveTrafficEntry entry,
+  ) {
+    final route = entry.route;
+    if (route == null || route.pathBytes.isEmpty) {
+      return Future.value();
     }
-    if (node.matchCount > 0) {
-      return node.label;
-    }
-    return node.hexLabel;
+    return showModalBottomSheet<void>(
+      context: context,
+      isScrollControlled: true,
+      backgroundColor: Theme.of(context).colorScheme.surface,
+      shape: const RoundedRectangleBorder(
+        borderRadius: BorderRadius.vertical(top: Radius.circular(16)),
+      ),
+      builder: (context) => MessageTraceSheet.packetPath(
+        packetPath: route.pathBytes,
+        descriptionOverride:
+            'Relay path from packet path bytes (${route.hopHashes.length} hop${route.hopHashes.length == 1 ? '' : 's'})',
+        noRelayMatchTextOverride:
+            'No named nodes could be matched for this packet path.',
+      ),
+    );
+  }
+
+}
+
+class _LiveTrafficPacketDetails {
+  final String title;
+  final String packetHashHex;
+  final String? pathLine;
+  final String? pathHashLine;
+  final String? endpointLine;
+
+  const _LiveTrafficPacketDetails({
+    required this.title,
+    required this.packetHashHex,
+    required this.pathLine,
+    required this.pathHashLine,
+    required this.endpointLine,
+  });
+
+  factory _LiveTrafficPacketDetails.fromEntry(LiveTrafficEntry entry) {
+    final route = entry.route;
+    final payloadType = route?.payloadType;
+    final parsedPayload = _ParsedTrafficPayload.tryParse(
+      entry.log.rawData,
+      route,
+    );
+    final title = switch (payloadType) {
+      0x00 => 'FLOOD REQUEST',
+      0x01 => 'FLOOD RESPONSE',
+      0x02 => 'FLOOD TEXT',
+      0x03 => 'FLOOD ACK',
+      0x04 => 'FLOOD ADVERTISEMENT',
+      0x05 => 'FLOOD GROUP_TEXT',
+      0x06 => 'FLOOD GROUP_DATA',
+      0x07 => 'FLOOD ANON_REQUEST',
+      0x08 => 'FLOOD RETURNED_PATH',
+      0x09 => 'FLOOD TRACE_PATH',
+      0x0A => 'FLOOD MULTIPART',
+      0x0B => 'FLOOD CONTROL',
+      _ => entry.payloadLabel.toUpperCase(),
+    };
+
+    final hopHashes = route?.hopHashes ?? const <String>[];
+    final pathLine = hopHashes.isEmpty
+        ? null
+        : 'Path: ${hopHashes.length} hop${hopHashes.length == 1 ? '' : 's'} [${hopHashes.join(',')}]';
+    final pathHashLine = route == null
+        ? null
+        : 'Path Hashes: ${route.hashSize}-byte per hop';
+
+    return _LiveTrafficPacketDetails(
+      title: title,
+      packetHashHex: _packetHash(entry.log.rawData),
+      pathLine: pathLine,
+      pathHashLine: pathHashLine,
+      endpointLine: parsedPayload?.endpointLine,
+    );
+  }
+
+  static String _packetHash(List<int> bytes) {
+    final digest = md5.convert(bytes).bytes;
+    return digest
+        .take(8)
+        .map((byte) => byte.toRadixString(16).padLeft(2, '0'))
+        .join()
+        .toUpperCase();
   }
 }
 
+class _ParsedTrafficPayload {
+  final String? endpointLine;
+
+  const _ParsedTrafficPayload({this.endpointLine});
+
+  static _ParsedTrafficPayload? tryParse(
+    List<int> rawData,
+    DecodedLogRxRoute? route,
+  ) {
+    if (rawData.length < 5 ||
+        rawData.first != LiveTrafficSummary.logRxDataResponseCode) {
+      return null;
+    }
+
+    final rawPacketData = rawData.sublist(3);
+    if (rawPacketData.length < 2) return null;
+
+    final header = rawPacketData[0];
+    final routeType = header & 0x03;
+    final payloadType = (header >> 2) & 0x0F;
+
+    var index = 1;
+    if (routeType == 0x00 || routeType == 0x03) {
+      if (rawPacketData.length < index + 5) return null;
+      index += 4;
+    }
+
+    if (rawPacketData.length <= index) return null;
+    final pathDescriptor = rawPacketData[index++];
+    final pathByteLen =
+        LogRxRouteDecoder.descriptorByteLength(pathDescriptor) ??
+        (pathDescriptor == 0xFF ? 0 : null);
+    if (pathByteLen == null || rawPacketData.length < index + pathByteLen) {
+      return null;
+    }
+    index += pathByteLen;
+    final payload = rawPacketData.sublist(index);
+    final senderHash = route?.hopHashes.isNotEmpty == true
+        ? route!.hopHashes.first
+        : null;
+
+    switch (payloadType) {
+      case 0x05:
+      case 0x06:
+        if (payload.isEmpty) return const _ParsedTrafficPayload();
+        return _ParsedTrafficPayload(
+          endpointLine:
+              'Channel Hash: ${payload.first.toRadixString(16).padLeft(2, '0').toUpperCase()}',
+        );
+      case 0x00:
+      case 0x01:
+      case 0x07:
+        if (payload.isEmpty) return const _ParsedTrafficPayload();
+        final destinationHash = payload.first
+            .toRadixString(16)
+            .padLeft(2, '0')
+            .toUpperCase();
+        return _ParsedTrafficPayload(
+          endpointLine: senderHash == null
+              ? 'To: <$destinationHash>'
+              : 'From: <${senderHash.toUpperCase()}> To: <$destinationHash>',
+        );
+      default:
+        return const _ParsedTrafficPayload();
+    }
+  }
+}
+
+class _PacketInfoLine extends StatelessWidget {
+  final String text;
+
+  const _PacketInfoLine({required this.text});
+
+  @override
+  Widget build(BuildContext context) {
+    return Padding(
+      padding: const EdgeInsets.only(bottom: 4),
+      child: Text(
+        text,
+        style: TextStyle(
+          fontSize: 13,
+          color: Theme.of(context).colorScheme.onSurface,
+        ),
+      ),
+    );
+  }
+}
+
+
 class _GeoPoint {
   final double latitude;
   final double longitude;
@@ -958,44 +1112,6 @@ class _GeoPoint {
   const _GeoPoint(this.latitude, this.longitude);
 }
 
-class _PacketMetaChip extends StatelessWidget {
-  final String label;
-  final bool emphasized;
-  final VoidCallback? onTap;
-
-  const _PacketMetaChip({
-    required this.label,
-    this.emphasized = false,
-    this.onTap,
-  });
-
-  @override
-  Widget build(BuildContext context) {
-    final scheme = Theme.of(context).colorScheme;
-    final color = emphasized ? scheme.primary : scheme.outline;
-    return InkWell(
-      onTap: onTap,
-      borderRadius: BorderRadius.circular(999),
-      child: Container(
-        padding: const EdgeInsets.symmetric(horizontal: 10, vertical: 6),
-        decoration: BoxDecoration(
-          color: color.withValues(alpha: emphasized ? 0.12 : 0.08),
-          borderRadius: BorderRadius.circular(999),
-          border: Border.all(color: color.withValues(alpha: 0.22)),
-        ),
-        child: Text(
-          label,
-          style: TextStyle(
-            fontSize: 12,
-            fontWeight: FontWeight.w600,
-            color: color,
-          ),
-        ),
-      ),
-    );
-  }
-}
-
 void openLiveTrafficScreen(BuildContext context, ConnectionProvider provider) {
   Navigator.push(
     context,

lib/screens/messages_tab.dart

@@ -61,9 +61,10 @@ class _MessagesTabState extends State<MessagesTab> {
   Timer? _highlightTimer; // Timer for clearing message highlight
   Timer? _channelReadTimer;
   String? _pendingChannelReadKey;
-  TextEditingValue _lastComposerValue = const TextEditingValue();
-  bool _isMentionPickerOpen = false;
   bool _suppressMentionTrigger = false;
+  TextRange? _activeMentionRange;
+  String _mentionQuery = '';
+  List<Contact> _mentionSuggestions = const [];
 
   // Message destination state
   String _destinationType =
@@ -92,8 +93,8 @@ class _MessagesTabState extends State<MessagesTab> {
   @override
   void initState() {
     super.initState();
-    _lastComposerValue = _textController.value;
     _textController.addListener(_handleComposerChanged);
+    _focusNode.addListener(_handleFocusChanged);
     // Load saved message destination
     _loadSavedDestination();
     _loadVoiceSettings();
@@ -126,6 +127,7 @@ class _MessagesTabState extends State<MessagesTab> {
     _channelReadTimer?.cancel();
     _voiceStreamSub?.cancel();
     _voiceRecorder.dispose();
+    _focusNode.removeListener(_handleFocusChanged);
     _textController.dispose();
     _focusNode.dispose();
     _scrollController.dispose();
@@ -161,9 +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
@@ -195,25 +201,13 @@ class _MessagesTabState extends State<MessagesTab> {
   }
 
   void _handleComposerChanged() {
-    final previousValue = _lastComposerValue;
-    final currentValue = _textController.value;
-    _lastComposerValue = currentValue;
-
     _updateCharacterCount();
 
-    if (_suppressMentionTrigger || _isMentionPickerOpen) {
+    if (_suppressMentionTrigger) {
       return;
     }
 
-    final mentionTriggerRange = _getMentionTriggerRange(
-      previousValue: previousValue,
-      currentValue: currentValue,
-    );
-    if (mentionTriggerRange == null) {
-      return;
-    }
-
-    unawaited(_showMentionSelectorForRange(mentionTriggerRange));
+    _updateMentionSuggestions(_textController.value);
   }
 
   void _updateCharacterCount() {
@@ -222,43 +216,112 @@ class _MessagesTabState extends State<MessagesTab> {
     });
   }
 
-  TextRange? _getMentionTriggerRange({
-    required TextEditingValue previousValue,
-    required TextEditingValue currentValue,
-  }) {
-    if (!previousValue.selection.isValid ||
-        !currentValue.selection.isValid ||
-        !previousValue.selection.isCollapsed ||
-        !currentValue.selection.isCollapsed) {
+  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 previousOffset = previousValue.selection.baseOffset;
-    final currentOffset = currentValue.selection.baseOffset;
-    if (previousOffset < 0 || currentOffset < 0) {
+    final cursorOffset = value.selection.baseOffset;
+    if (cursorOffset <= 0) {
       return null;
     }
 
-    if (currentValue.text.length != previousValue.text.length + 1 ||
-        currentOffset != previousOffset + 1) {
+    final text = value.text;
+    final triggerStart = text.lastIndexOf('@', cursorOffset - 1);
+    if (triggerStart == -1) {
       return null;
     }
 
-    if (currentValue.text.substring(0, previousOffset) !=
-        previousValue.text.substring(0, previousOffset)) {
+    final leadingChar = triggerStart > 0 ? text[triggerStart - 1] : null;
+    if (leadingChar != null && !RegExp(r'[\s\(\[\{]').hasMatch(leadingChar)) {
       return null;
     }
 
-    if (currentValue.text.substring(currentOffset) !=
-        previousValue.text.substring(previousOffset)) {
+    final query = text.substring(triggerStart + 1, cursorOffset);
+    if (query.contains(RegExp(r'[\s@\[\]\n\r]'))) {
       return null;
     }
 
-    if (currentValue.text[previousOffset] != '@') {
-      return null;
-    }
+    return TextRange(start: triggerStart, end: cursorOffset);
+  }
 
-    return TextRange(start: previousOffset, end: currentOffset);
+  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 =>
@@ -378,56 +441,6 @@ class _MessagesTabState extends State<MessagesTab> {
     );
   }
 
-  Future<void> _showMentionSelectorForRange(TextRange triggerRange) async {
-    final contactsProvider = context.read<ContactsProvider>();
-    final contacts = contactsProvider.contacts
-        .where((contact) => contact.type == ContactType.chat)
-        .toList();
-
-    if (contacts.isEmpty || !mounted) {
-      return;
-    }
-
-    _isMentionPickerOpen = true;
-    Contact? selectedContact;
-
-    await showModalBottomSheet<void>(
-      context: context,
-      isScrollControlled: true,
-      backgroundColor: Colors.transparent,
-      builder: (context) => RecipientSelectorSheet(
-        contacts: contacts,
-        rooms: const [],
-        channels: const [],
-        unreadCount: 0,
-        unreadCountsByPublicKey: {
-          for (final contact in contacts) contact.publicKeyHex: 0,
-        },
-        currentDestinationType: null,
-        currentRecipientPublicKey: null,
-        showAllOption: false,
-        onSelect: (_, recipient) {
-          selectedContact = recipient;
-        },
-      ),
-    );
-
-    _isMentionPickerOpen = false;
-
-    if (!mounted) {
-      return;
-    }
-
-    if (selectedContact != null) {
-      _insertReplyMention(
-        selectedContact!.displayName,
-        replacementRange: triggerRange,
-      );
-    }
-
-    _focusNode.requestFocus();
-  }
-
   /// Handle recipient selection
   Future<void> _onRecipientSelected(String type, Contact? recipient) async {
     setState(() {
@@ -489,15 +502,24 @@ class _MessagesTabState extends State<MessagesTab> {
       selection: TextSelection.collapsed(offset: nextOffset),
       composing: TextRange.empty,
     );
-    _lastComposerValue = _textController.value;
     _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;
@@ -522,28 +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();
   }
@@ -2002,7 +2044,9 @@ class _MessagesTabState extends State<MessagesTab> {
     return Consumer<MessagesProvider>(
       builder: (context, messagesProvider, child) {
         _syncChannelAutoReadTimer(messagesProvider);
-        final messages = _getFilteredMessages(messagesProvider);
+        final messages = messagesProvider.buildDisplayMessages(
+          _getFilteredMessages(messagesProvider),
+        );
         final bottomInset = MediaQuery.of(context).viewPadding.bottom;
         final composerBottomPadding = bottomInset > 0 ? 2.0 : 10.0;
 
@@ -2040,6 +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

@@ -25,12 +25,12 @@ 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';
@@ -77,6 +77,11 @@ class _SettingsScreenState extends State<SettingsScreen> {
   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;
@@ -99,6 +104,7 @@ class _SettingsScreenState extends State<SettingsScreen> {
     _loadDeveloperMode();
     _loadOnlineTraceCacheStatus();
     _loadMapPreferences();
+    _loadNotificationPreferences();
   }
 
   @override
@@ -136,6 +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;
@@ -187,8 +206,7 @@ class _SettingsScreenState extends State<SettingsScreen> {
     final prefs = await SharedPreferences.getInstance();
     if (!mounted) return;
     setState(() {
-      _rotateMapWithHeading =
-          prefs.getBool('map_rotate_with_heading') ?? false;
+      _rotateMapWithHeading = prefs.getBool('map_rotate_with_heading') ?? false;
       _showMapDebugInfo = prefs.getBool('map_show_debug_info') ?? false;
       _openMapInFullscreen = prefs.getBool('map_fullscreen') ?? false;
     });
@@ -1002,6 +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>(
@@ -1047,19 +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'),
@@ -1224,9 +1311,7 @@ class _SettingsScreenState extends State<SettingsScreen> {
               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',
-                ),
+                subtitle: const Text('Display SAR markers on the main map'),
                 value: drawingProvider.showSarMarkers,
                 onChanged: (value) {
                   drawingProvider.toggleSarMarkers();
@@ -1468,11 +1553,6 @@ class _SettingsScreenState extends State<SettingsScreen> {
             ),
           ]),
 
-          if (!kIsWeb) ...[
-            _buildSectionHeader('Network Sharing'),
-            const ConnectionModeSelector(),
-          ],
-
           _buildSectionHeader(AppLocalizations.of(context)!.permissionsSection),
           _buildSettingsCard([
             SwitchListTile(
@@ -1795,7 +1875,7 @@ class _SettingsScreenState extends State<SettingsScreen> {
                     style: Theme.of(context).textTheme.bodySmall,
                   ),
                 ),
-                Switch.adaptive(
+                Switch(
                   value: _showCurrentImagePreview,
                   onChanged: (value) {
                     setState(() => _showCurrentImagePreview = value);

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_storage_service.dart

@@ -10,7 +10,9 @@ import 'package:latlong2/latlong.dart';
 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 {
@@ -126,6 +128,47 @@ class ContactStorageService {
     }
   }
 
+  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 {
@@ -167,6 +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(),
     };
   }
 
@@ -190,6 +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');
@@ -242,6 +295,25 @@ class ContactStorageService {
     }
   }
 
+  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,

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

@@ -329,6 +329,8 @@ class MessageStorageService {
     Message message, {
     MessageReceptionDetails? receptionDetails,
   }) {
+    final persistedPathBytes =
+        message.pathBytes ?? _pathBytesFromSnapshot(receptionDetails);
     return {
       'id': message.id,
       'messageType': message.messageType.name,
@@ -337,6 +339,7 @@ class MessageStorageService {
           : null,
       'channelIdx': message.channelIdx,
       'pathLen': message.pathLen,
+      'pathBytes': persistedPathBytes?.toList(),
       'textType': message.textType.value,
       'senderTimestamp': message.senderTimestamp,
       'text': message.text,
@@ -465,6 +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,
@@ -562,4 +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/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_preferences.dart

@@ -1,21 +0,0 @@
-import 'package:shared_preferences/shared_preferences.dart';
-import '../utils/voice_message_parser.dart';
-
-class VoiceCodecPreferences {
-  static const String _codecKey = 'voice_codec';
-  static const VoiceCodecKind defaultCodec = VoiceCodecKind.codec2;
-
-  static Future<VoiceCodecKind> getCodec() async {
-    final prefs = await SharedPreferences.getInstance();
-    final raw = prefs.getString(_codecKey);
-    return VoiceCodecKind.values.firstWhere(
-      (codec) => codec.name == raw,
-      orElse: () => defaultCodec,
-    );
-  }
-
-  static Future<void> setCodec(VoiceCodecKind codec) async {
-    final prefs = await SharedPreferences.getInstance();
-    await prefs.setString(_codecKey, codec.name);
-  }
-}

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/voice_message_parser.dart

@@ -11,36 +11,26 @@ const int _defaultLoRaCrcEnabled = 1;
 const int _defaultLoRaExplicitHeader = 1;
 const double _defaultAirtimeBudgetFactor = 1.0; // one half duty-cycle
 
-enum VoiceCodecKind {
-  codec2(0, 'Codec2');
-
-  const VoiceCodecKind(this.id, this.label);
-  final int id;
-  final String label;
-}
-
 /// 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', VoiceCodecKind.codec2, 8000, 100, 1600),
-  mode1200(1, '1200', VoiceCodecKind.codec2, 8000, 150, 1040),
-  mode2400(2, '2400', VoiceCodecKind.codec2, 8000, 300, 520),
-  mode1300(3, '1300', VoiceCodecKind.codec2, 8000, 175, 880),
-  mode1400(4, '1400', VoiceCodecKind.codec2, 8000, 175, 880),
-  mode1600(5, '1600', VoiceCodecKind.codec2, 8000, 200, 800),
-  mode3200(6, '3200', VoiceCodecKind.codec2, 8000, 400, 400);
+  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,
-    this.codec,
     this.sampleRateHz,
     this.bytesPerSecond,
     this.packetDurationMs,
   );
   final int id;
   final String label;
-  final VoiceCodecKind codec;
   final int sampleRateHz;
   final int bytesPerSecond;
   final int packetDurationMs;

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/contact_route_dialog.dart

@@ -1,16 +1,17 @@
+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 'dart:math' as math;
 
 import '../../models/contact.dart';
-import '../../providers/connection_provider.dart';
+import '../../models/path_history.dart';
 import '../../providers/app_provider.dart';
+import '../../providers/connection_provider.dart';
 import '../../services/contact_route_resolver.dart';
 import '../../services/path_history_service.dart';
 import '../../services/route_hash_preferences.dart';
-import '../../models/path_history.dart';
 
 class ContactRouteDialogResult {
   final ParsedContactRoute? route;
@@ -53,19 +54,11 @@ class ContactRouteDialog extends StatefulWidget {
     required Contact contact,
     required List<Contact> availableContacts,
   }) {
-    return showModalBottomSheet<ContactRouteDialogResult>(
-      context: context,
-      isScrollControlled: true,
-      showDragHandle: true,
-      builder: (context) => SafeArea(
-        child: Padding(
-          padding: EdgeInsets.only(
-            bottom: MediaQuery.of(context).viewInsets.bottom,
-          ),
-          child: ContactRouteDialog(
-            contact: contact,
-            availableContacts: availableContacts,
-          ),
+    return Navigator.of(context).push<ContactRouteDialogResult>(
+      MaterialPageRoute(
+        builder: (context) => ContactRouteDialog(
+          contact: contact,
+          availableContacts: availableContacts,
         ),
       ),
     );
@@ -77,14 +70,15 @@ class ContactRouteDialog extends StatefulWidget {
 
 class _ContactRouteDialogState extends State<ContactRouteDialog> {
   late final TextEditingController _controller;
+  late final TextEditingController _relaySearchController;
   final PathHistoryService _pathHistoryService = PathHistoryService();
   int _selectedHashSize = RouteHashPreferences.defaultHashSize;
   ParsedContactRoute? _parsedRoute;
   String? _errorText;
   bool _showRoutingInfo = false;
+  bool _showManualEditor = false;
   List<Contact> _selectedMapHops = const [];
   ContactPathHistory? _pathHistory;
-  _RouteEntryMode _entryMode = _RouteEntryMode.map;
 
   @override
   void initState() {
@@ -92,10 +86,9 @@ class _ContactRouteDialogState extends State<ContactRouteDialog> {
     _controller = TextEditingController(
       text: widget.contact.routeCanonicalText,
     );
+    _relaySearchController = TextEditingController();
     _controller.addListener(_reparse);
-    _entryMode = widget.contact.routeCanonicalText.isNotEmpty
-        ? _RouteEntryMode.manual
-        : _RouteEntryMode.map;
+    _showManualEditor = widget.contact.routeCanonicalText.isNotEmpty;
     _loadHashSizePreference();
     _loadPathHistory();
     _reparse();
@@ -103,6 +96,7 @@ class _ContactRouteDialogState extends State<ContactRouteDialog> {
 
   @override
   void dispose() {
+    _relaySearchController.dispose();
     _controller
       ..removeListener(_reparse)
       ..dispose();
@@ -231,7 +225,7 @@ class _ContactRouteDialogState extends State<ContactRouteDialog> {
         TextPosition(offset: _controller.text.length),
       );
       _errorText = null;
-      _entryMode = _RouteEntryMode.map;
+      _showManualEditor = false;
     });
     _reparse();
   }
@@ -247,7 +241,7 @@ class _ContactRouteDialogState extends State<ContactRouteDialog> {
         TextPosition(offset: _controller.text.length),
       );
       _errorText = null;
-      _entryMode = _RouteEntryMode.manual;
+      _showManualEditor = true;
     });
     _reparse();
   }
@@ -416,30 +410,279 @@ class _ContactRouteDialogState extends State<ContactRouteDialog> {
   }
 
   Widget _buildPreviewSection() {
+    final colorScheme = Theme.of(context).colorScheme;
+    return Container(
+      width: double.infinity,
+      padding: const EdgeInsets.all(14),
+      decoration: BoxDecoration(
+        color: colorScheme.surfaceContainerHighest.withValues(alpha: 0.5),
+        borderRadius: BorderRadius.circular(16),
+        border: Border.all(color: colorScheme.outlineVariant),
+      ),
+      child: Column(
+        crossAxisAlignment: CrossAxisAlignment.start,
+        children: [
+          Text(
+            _parsedRoute == null ? 'Route preview' : _parsedRoute!.summary,
+            style: Theme.of(context).textTheme.titleSmall,
+          ),
+          const SizedBox(height: 4),
+          Text(
+            _parsedRoute == null
+                ? 'Pick relays from the list below or open manual edit if you need exact hop tokens.'
+                : '${_parsedRoute!.byteLength} bytes • descriptor 0x${_parsedRoute!.encodedPathLen.toRadixString(16).padLeft(2, '0').toUpperCase()}',
+            style: Theme.of(context).textTheme.bodySmall,
+          ),
+          if (_parsedRoute != null) ...[
+            const SizedBox(height: 10),
+            SelectableText(
+              _parsedRoute!.canonicalText,
+              style: Theme.of(
+                context,
+              ).textTheme.bodyMedium?.copyWith(fontFamily: 'monospace'),
+            ),
+          ],
+        ],
+      ),
+    );
+  }
+
+  Widget _buildSelectedHopSection() {
+    if (_selectedMapHops.isEmpty) {
+      return Container(
+        width: double.infinity,
+        padding: const EdgeInsets.all(14),
+        decoration: BoxDecoration(
+          borderRadius: BorderRadius.circular(16),
+          border: Border.all(color: Theme.of(context).dividerColor),
+        ),
+        child: Text(
+          'No relays selected yet. Add repeaters below or let auto resolve build a route.',
+          style: Theme.of(context).textTheme.bodyMedium,
+        ),
+      );
+    }
+
     return Column(
       crossAxisAlignment: CrossAxisAlignment.start,
       children: [
-        Text(
-          _parsedRoute == null
-              ? 'Preview: enter or pick a route to validate it.'
-              : 'Preview: ${_parsedRoute!.summary} • ${_parsedRoute!.byteLength} bytes • descriptor 0x${_parsedRoute!.encodedPathLen.toRadixString(16).padLeft(2, '0').toUpperCase()}',
-          style: Theme.of(context).textTheme.bodySmall,
-        ),
-        if (_parsedRoute != null) ...[
-          const SizedBox(height: 4),
-          SelectableText(
-            _parsedRoute!.canonicalText,
-            style: Theme.of(
-              context,
-            ).textTheme.bodyMedium?.copyWith(fontFamily: 'monospace'),
-          ),
-        ],
+        Text('Selected relays', style: Theme.of(context).textTheme.titleSmall),
+        const SizedBox(height: 8),
+        ..._selectedMapHops.asMap().entries.map((entry) {
+          final index = entry.key;
+          final contact = entry.value;
+          return Card(
+            margin: const EdgeInsets.only(bottom: 8),
+            child: ListTile(
+              leading: CircleAvatar(child: Text('${index + 1}')),
+              title: Text(contact.displayName),
+              subtitle: Text(
+                _tokenFor(contact, _selectedHashSize),
+                style: Theme.of(
+                  context,
+                ).textTheme.bodySmall?.copyWith(fontFamily: 'monospace'),
+              ),
+              trailing: IconButton(
+                tooltip: 'Remove relay',
+                onPressed: () => _toggleHop(contact),
+                icon: const Icon(Icons.close),
+              ),
+            ),
+          );
+        }),
       ],
     );
   }
 
-  Widget _buildBuilderTab(
-    BuildContext context, {
+  Widget _buildRelayPicker(List<Contact> routeCandidates) {
+    final query = _relaySearchController.text.trim().toLowerCase();
+    final filteredCandidates = routeCandidates.where((contact) {
+      if (query.isEmpty) return true;
+      return contact.displayName.toLowerCase().contains(query) ||
+          _tokenFor(contact, _selectedHashSize).toLowerCase().contains(query);
+    }).toList();
+
+    return Column(
+      crossAxisAlignment: CrossAxisAlignment.start,
+      children: [
+        TextField(
+          controller: _relaySearchController,
+          onChanged: (_) => setState(() {}),
+          decoration: const InputDecoration(
+            prefixIcon: Icon(Icons.search),
+            labelText: 'Find relay',
+            hintText: 'Search by name or token',
+            border: OutlineInputBorder(),
+          ),
+        ),
+        const SizedBox(height: 12),
+        if (filteredCandidates.isEmpty)
+          Container(
+            width: double.infinity,
+            padding: const EdgeInsets.all(14),
+            decoration: BoxDecoration(
+              borderRadius: BorderRadius.circular(16),
+              border: Border.all(color: Theme.of(context).dividerColor),
+            ),
+            child: Text(
+              'No visible relays match this search.',
+              style: Theme.of(context).textTheme.bodyMedium,
+            ),
+          )
+        else
+          ...filteredCandidates.map((candidate) {
+            final isSelected = _selectedMapHops.any(
+              (item) => item.publicKeyHex == candidate.publicKeyHex,
+            );
+            final location = candidate.displayLocation;
+            return Card(
+              margin: const EdgeInsets.only(bottom: 8),
+              child: ListTile(
+                leading: Icon(
+                  isSelected
+                      ? Icons.check_circle
+                      : Icons.radio_button_unchecked,
+                  color: isSelected
+                      ? Theme.of(context).colorScheme.primary
+                      : null,
+                ),
+                title: Text(candidate.displayName),
+                subtitle: Text(
+                  [
+                    _tokenFor(candidate, _selectedHashSize),
+                    if (location != null)
+                      '${location.latitude.toStringAsFixed(4)}, ${location.longitude.toStringAsFixed(4)}',
+                  ].join(' • '),
+                  style: Theme.of(
+                    context,
+                  ).textTheme.bodySmall?.copyWith(fontFamily: 'monospace'),
+                ),
+                trailing: TextButton(
+                  onPressed: () => _toggleHop(candidate),
+                  child: Text(isSelected ? 'Remove' : 'Add'),
+                ),
+              ),
+            );
+          }),
+      ],
+    );
+  }
+
+  Widget _buildManualEditor() {
+    return ExpansionTile(
+      tilePadding: EdgeInsets.zero,
+      childrenPadding: EdgeInsets.zero,
+      initiallyExpanded: _showManualEditor,
+      onExpansionChanged: (expanded) {
+        setState(() {
+          _showManualEditor = expanded;
+        });
+      },
+      title: const Text('Manual route edit'),
+      subtitle: const Text(
+        'Use this when you need to paste or tweak hop tokens directly.',
+      ),
+      children: [
+        TextField(
+          controller: _controller,
+          textCapitalization: TextCapitalization.characters,
+          decoration: InputDecoration(
+            labelText: 'Route',
+            hintText: _selectedHashSize == 1
+                ? 'AA,BB,CC'
+                : _selectedHashSize == 2
+                ? 'AABB,CCDD'
+                : 'AABBCC,DDEEFF',
+            helperText:
+                'Comma-separated hops. Hash size follows global Settings. Colon form like AA:BB is also accepted.',
+            errorText: _errorText,
+            border: const OutlineInputBorder(),
+          ),
+        ),
+      ],
+    );
+  }
+
+  Widget _buildMapPreview({
+    required List<Contact> routeCandidates,
+    required List<LatLng> mapPoints,
+    required List<LatLng> routePoints,
+  }) {
+    final colorScheme = Theme.of(context).colorScheme;
+    return Container(
+      decoration: BoxDecoration(
+        borderRadius: BorderRadius.circular(16),
+        border: Border.all(color: colorScheme.outlineVariant),
+      ),
+      clipBehavior: Clip.antiAlias,
+      child: SizedBox(
+        height: 220,
+        child: mapPoints.length < 2
+            ? const Center(
+                child: Padding(
+                  padding: EdgeInsets.all(16),
+                  child: Text(
+                    'Map preview needs your advertised location, the contact location, and visible repeater locations.',
+                    textAlign: TextAlign.center,
+                  ),
+                ),
+              )
+            : flutter_map.FlutterMap(
+                options: flutter_map.MapOptions(
+                  initialCameraFit: flutter_map.CameraFit.bounds(
+                    bounds: flutter_map.LatLngBounds.fromPoints(mapPoints),
+                    padding: const EdgeInsets.all(32),
+                  ),
+                ),
+                children: [
+                  flutter_map.TileLayer(
+                    urlTemplate:
+                        'https://tile.openstreetmap.org/{z}/{x}/{y}.png',
+                    userAgentPackageName: 'com.meshcore.sar',
+                  ),
+                  if (routePoints.length >= 2)
+                    flutter_map.PolylineLayer(
+                      polylines: [
+                        flutter_map.Polyline(
+                          points: routePoints,
+                          strokeWidth: 4,
+                          color: colorScheme.primary,
+                        ),
+                      ],
+                    ),
+                  flutter_map.MarkerLayer(
+                    markers: [
+                      ...routeCandidates.map((candidate) {
+                        final isSelected = _selectedMapHops.any(
+                          (item) => item.publicKeyHex == candidate.publicKeyHex,
+                        );
+                        return flutter_map.Marker(
+                          point: LatLng(
+                            candidate.displayLocation!.latitude,
+                            candidate.displayLocation!.longitude,
+                          ),
+                          width: 64,
+                          height: 70,
+                          child: GestureDetector(
+                            onTap: () => _toggleHop(candidate),
+                            child: _RouteMarkerDot(
+                              label: _tokenFor(candidate, _selectedHashSize),
+                              color: isSelected
+                                  ? colorScheme.primary
+                                  : Colors.blueGrey,
+                            ),
+                          ),
+                        );
+                      }),
+                    ],
+                  ),
+                ],
+              ),
+      ),
+    );
+  }
+
+  Widget _buildBuilderTab({
     required List<Contact> routeCandidates,
     required List<LatLng> mapPoints,
     required List<LatLng> routePoints,
@@ -447,174 +690,43 @@ class _ContactRouteDialogState extends State<ContactRouteDialog> {
     return Column(
       crossAxisAlignment: CrossAxisAlignment.start,
       children: [
-        SegmentedButton<_RouteEntryMode>(
-          segments: const [
-            ButtonSegment<_RouteEntryMode>(
-              value: _RouteEntryMode.map,
-              icon: Icon(Icons.map_outlined),
-              label: Text('Map'),
+        Wrap(
+          spacing: 8,
+          runSpacing: 8,
+          children: [
+            FilledButton.tonalIcon(
+              onPressed: _resolvePathAutomatically,
+              icon: const Icon(Icons.auto_fix_high),
+              label: const Text('Auto resolve'),
             ),
-            ButtonSegment<_RouteEntryMode>(
-              value: _RouteEntryMode.manual,
-              icon: Icon(Icons.tune),
-              label: Text('Manual'),
+            OutlinedButton.icon(
+              onPressed: _selectedMapHops.isEmpty
+                  ? null
+                  : () {
+                      setState(() {
+                        _selectedMapHops = const [];
+                        _syncControllerFromSelectedHops();
+                      });
+                    },
+              icon: const Icon(Icons.clear_all),
+              label: const Text('Clear relays'),
             ),
           ],
-          selected: {_entryMode},
-          onSelectionChanged: (selection) {
-            setState(() {
-              _entryMode = selection.first;
-            });
-          },
         ),
         const SizedBox(height: 16),
-        if (_entryMode == _RouteEntryMode.manual) ...[
-          TextField(
-            controller: _controller,
-            textCapitalization: TextCapitalization.characters,
-            decoration: InputDecoration(
-              labelText: 'Route',
-              hintText: _selectedHashSize == 1
-                  ? 'AA,BB,CC'
-                  : _selectedHashSize == 2
-                  ? 'AABB,CCDD'
-                  : 'AABBCC,DDEEFF',
-              helperText:
-                  'Enter comma-separated hops. Path byte size comes from global Settings. Colon form like AA:BB is also accepted.',
-              errorText: _errorText,
-              border: const OutlineInputBorder(),
-            ),
-          ),
-          const SizedBox(height: 12),
-          _buildPreviewSection(),
-        ] else ...[
-          Wrap(
-            spacing: 8,
-            runSpacing: 8,
-            crossAxisAlignment: WrapCrossAlignment.center,
-            children: [
-              OutlinedButton.icon(
-                onPressed: _resolvePathAutomatically,
-                icon: const Icon(Icons.auto_fix_high),
-                label: const Text('Resolve Path'),
-              ),
-              ConstrainedBox(
-                constraints: const BoxConstraints(maxWidth: 280),
-                child: Text(
-                  'Tap repeaters on the map to build the path, then review the generated route below.',
-                  style: Theme.of(context).textTheme.bodySmall,
-                ),
-              ),
-            ],
-          ),
-          const SizedBox(height: 16),
-          SizedBox(
-            height: 260,
-            child: ClipRRect(
-              borderRadius: BorderRadius.circular(12),
-              child: DecoratedBox(
-                decoration: BoxDecoration(
-                  border: Border.all(color: Theme.of(context).dividerColor),
-                ),
-                child: mapPoints.length < 2
-                    ? const Center(
-                        child: Padding(
-                          padding: EdgeInsets.all(16),
-                          child: Text(
-                            'Map path builder needs your advertised location, the contact location, and visible repeater locations.',
-                            textAlign: TextAlign.center,
-                          ),
-                        ),
-                      )
-                    : flutter_map.FlutterMap(
-                        options: flutter_map.MapOptions(
-                          initialCameraFit: flutter_map.CameraFit.bounds(
-                            bounds: flutter_map.LatLngBounds.fromPoints(
-                              mapPoints,
-                            ),
-                            padding: const EdgeInsets.all(32),
-                          ),
-                        ),
-                        children: [
-                          flutter_map.TileLayer(
-                            urlTemplate:
-                                'https://tile.openstreetmap.org/{z}/{x}/{y}.png',
-                            userAgentPackageName: 'com.meshcore.sar',
-                          ),
-                          if (routePoints.length >= 2)
-                            flutter_map.PolylineLayer(
-                              polylines: [
-                                flutter_map.Polyline(
-                                  points: routePoints,
-                                  strokeWidth: 4,
-                                  color: Theme.of(context).colorScheme.primary,
-                                ),
-                              ],
-                            ),
-                          flutter_map.MarkerLayer(
-                            markers: [
-                              ...routeCandidates.map((candidate) {
-                                final isSelected = _selectedMapHops.any(
-                                  (item) =>
-                                      item.publicKeyHex ==
-                                      candidate.publicKeyHex,
-                                );
-                                return flutter_map.Marker(
-                                  point: LatLng(
-                                    candidate.displayLocation!.latitude,
-                                    candidate.displayLocation!.longitude,
-                                  ),
-                                  width: 64,
-                                  height: 70,
-                                  child: GestureDetector(
-                                    onTap: () => _toggleHop(candidate),
-                                    child: _RouteMarkerDot(
-                                      label: _tokenFor(
-                                        candidate,
-                                        _selectedHashSize,
-                                      ),
-                                      color: isSelected
-                                          ? Theme.of(
-                                              context,
-                                            ).colorScheme.primary
-                                          : Colors.blueGrey,
-                                    ),
-                                  ),
-                                );
-                              }),
-                            ],
-                          ),
-                        ],
-                      ),
-              ),
-            ),
-          ),
-          const SizedBox(height: 12),
-          if (_selectedMapHops.isNotEmpty)
-            Wrap(
-              spacing: 8,
-              runSpacing: 8,
-              children: _selectedMapHops.map((contact) {
-                return InputChip(
-                  label: Text(contact.displayName),
-                  onDeleted: () => _toggleHop(contact),
-                );
-              }).toList(),
-            ),
-          const SizedBox(height: 12),
-          TextField(
-            controller: _controller,
-            readOnly: true,
-            decoration: InputDecoration(
-              labelText: 'Generated route',
-              helperText: 'Switch to Manual if you want to edit the hop list.',
-              errorText: _errorText,
-              border: const OutlineInputBorder(),
-            ),
-          ),
-          const SizedBox(height: 12),
-          _buildPreviewSection(),
-        ],
+        _buildPreviewSection(),
+        const SizedBox(height: 16),
+        _buildSelectedHopSection(),
+        const SizedBox(height: 16),
+        _buildRelayPicker(routeCandidates),
+        const SizedBox(height: 16),
+        _buildMapPreview(
+          routeCandidates: routeCandidates,
+          mapPoints: mapPoints,
+          routePoints: routePoints,
+        ),
+        const SizedBox(height: 16),
+        _buildManualEditor(),
       ],
     );
   }
@@ -720,39 +832,33 @@ class _ContactRouteDialogState extends State<ContactRouteDialog> {
 
     return DefaultTabController(
       length: 2,
-      child: FractionallySizedBox(
-        heightFactor: 0.85,
-        child: Padding(
-          padding: const EdgeInsets.fromLTRB(16, 0, 16, 16),
-          child: Column(
-            crossAxisAlignment: CrossAxisAlignment.start,
-            children: [
-              Text(
-                'Set Route for ${widget.contact.displayName}',
-                style: Theme.of(context).textTheme.headlineSmall,
-              ),
-              const SizedBox(height: 8),
-              Text(
-                'Choose how to build the route, or reuse one from history.',
-                style: Theme.of(context).textTheme.bodyMedium,
-              ),
-              const SizedBox(height: 16),
-              const TabBar(
-                tabs: [
-                  Tab(text: 'Build'),
-                  Tab(text: 'History'),
-                ],
-              ),
-              const SizedBox(height: 16),
-              Expanded(
-                child: TabBarView(
-                  children: [
-                    SingleChildScrollView(
-                      child: Column(
-                        crossAxisAlignment: CrossAxisAlignment.start,
+      child: Scaffold(
+        appBar: AppBar(
+          title: Text('Set Path for ${widget.contact.displayName}'),
+          bottom: const TabBar(
+            tabs: [
+              Tab(text: 'Build'),
+              Tab(text: 'History'),
+            ],
+          ),
+        ),
+        body: SafeArea(
+          child: Padding(
+            padding: const EdgeInsets.fromLTRB(16, 16, 16, 0),
+            child: Column(
+              crossAxisAlignment: CrossAxisAlignment.start,
+              children: [
+                Text(
+                  'Plan the route on its own screen, then save it once the preview looks right.',
+                  style: Theme.of(context).textTheme.bodyMedium,
+                ),
+                const SizedBox(height: 16),
+                Expanded(
+                  child: TabBarView(
+                    children: [
+                      ListView(
                         children: [
                           _buildBuilderTab(
-                            context,
                             routeCandidates: routeCandidates,
                             mapPoints: mapPoints,
                             routePoints: routePoints,
@@ -772,44 +878,54 @@ class _ContactRouteDialogState extends State<ContactRouteDialog> {
                             clearPathOnMaxRetry:
                                 appProvider.clearPathOnMaxRetry,
                           ),
+                          const SizedBox(height: 24),
                         ],
                       ),
-                    ),
-                    SingleChildScrollView(child: _buildHistoryTab()),
-                  ],
+                      ListView(
+                        children: [
+                          _buildHistoryTab(),
+                          const SizedBox(height: 24),
+                        ],
+                      ),
+                    ],
+                  ),
                 ),
-              ),
-              OverflowBar(
-                alignment: MainAxisAlignment.spaceBetween,
-                spacing: 8,
-                overflowSpacing: 8,
-                children: [
+              ],
+            ),
+          ),
+        ),
+        bottomNavigationBar: SafeArea(
+          top: false,
+          child: Padding(
+            padding: const EdgeInsets.fromLTRB(16, 8, 16, 16),
+            child: OverflowBar(
+              alignment: MainAxisAlignment.spaceBetween,
+              spacing: 8,
+              overflowSpacing: 8,
+              children: [
+                if (widget.contact.routeHasPath)
                   TextButton(
-                    onPressed: () => Navigator.of(context).pop(),
-                    child: const Text('Cancel'),
-                  ),
-                  if (widget.contact.routeHasPath)
-                    TextButton(
-                      onPressed: () => Navigator.of(
-                        context,
-                      ).pop(const ContactRouteDialogResult.clear()),
-                      child: const Text('Clear Route'),
-                    ),
-                  FilledButton(
-                    onPressed: _parsedRoute == null
-                        ? null
-                        : () => Navigator.of(context).pop(
-                            ContactRouteDialogResult.setWithFallback(
-                              _parsedRoute!,
-                              inferredFallbackLocation:
-                                  _buildSyntheticFallbackLocation(),
-                            ),
+                    onPressed: () => Navigator.of(
+                      context,
+                    ).pop(const ContactRouteDialogResult.clear()),
+                    child: const Text('Clear Route'),
+                  )
+                else
+                  const SizedBox.shrink(),
+                FilledButton(
+                  onPressed: _parsedRoute == null
+                      ? null
+                      : () => Navigator.of(context).pop(
+                          ContactRouteDialogResult.setWithFallback(
+                            _parsedRoute!,
+                            inferredFallbackLocation:
+                                _buildSyntheticFallbackLocation(),
                           ),
-                    child: const Text('Set Route'),
-                  ),
-                ],
-              ),
-            ],
+                        ),
+                  child: const Text('Save Path'),
+                ),
+              ],
+            ),
           ),
         ),
       ),
@@ -817,8 +933,6 @@ class _ContactRouteDialogState extends State<ContactRouteDialog> {
   }
 }
 
-enum _RouteEntryMode { map, manual }
-
 class _RouteMarkerDot extends StatelessWidget {
   final String label;
   final Color color;

lib/widgets/contacts/contact_tile.dart

@@ -16,6 +16,7 @@ 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';
 
@@ -325,10 +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);
 
@@ -379,6 +385,17 @@ class ContactTile extends StatelessWidget {
                     _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;
+                    await _showSensorPreviewView(context, contact);
+                  },
+                ),
               if (canAddToSensors)
                 ListTile(
                   leading: Icon(
@@ -452,6 +469,18 @@ class ContactTile extends StatelessWidget {
     );
   }
 
+  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) {
@@ -980,6 +1009,60 @@ 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;

lib/widgets/contacts/contact_trace_sheet.dart

@@ -131,7 +131,7 @@ class _ContactTraceSheetState extends State<ContactTraceSheet> {
                   padding: const EdgeInsets.symmetric(horizontal: 16),
                   child: Text(
                     trace.routeHashes.isEmpty
-                        ? 'Direct route to ${widget.contact.displayName}'
+                        ? 'No relay path saved for ${widget.contact.displayName}'
                         : 'Route from saved contact path (${trace.routeHashes.length} hop${trace.routeHashes.length == 1 ? '' : 's'})',
                     style: Theme.of(context).textTheme.bodySmall,
                   ),
@@ -199,14 +199,7 @@ class _ContactTraceSheetState extends State<ContactTraceSheet> {
                                                   child: CircleAvatar(
                                                     radius: 16,
                                                     backgroundColor:
-                                                        entry.key == 0
-                                                        ? Colors.green
-                                                        : (entry.key ==
-                                                                  concreteNodes
-                                                                          .length -
-                                                                      1
-                                                              ? Colors.red
-                                                              : Colors.blue),
+                                                        Colors.blue,
                                                     child: Text(
                                                       '${entry.key + 1}',
                                                       style: const TextStyle(
@@ -236,7 +229,7 @@ class _ContactTraceSheetState extends State<ContactTraceSheet> {
                       Padding(
                         padding: const EdgeInsets.symmetric(horizontal: 16),
                         child: Text(
-                          'Route',
+                          'Relay path',
                           style: Theme.of(context).textTheme.titleMedium,
                         ),
                       ),
@@ -263,11 +256,7 @@ class _ContactTraceSheetState extends State<ContactTraceSheet> {
                               : 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(
                               '${entry.key + 1}',
                               style: const TextStyle(
@@ -279,7 +268,7 @@ class _ContactTraceSheetState extends State<ContactTraceSheet> {
                           ),
                           title: Text(entry.value.label),
                           subtitle: Text(
-                            '${_routeRoleLabel(entry.key, routeEntries.length)}${entry.value.keyLabel == null ? '' : ' • ${entry.value.keyLabel}'}${entry.value.matchSummary == null ? '' : ' • ${entry.value.matchSummary}'}${entry.value.resolved.cycleSummary == null ? '' : ' • ${entry.value.resolved.cycleSummary}'}',
+                            'Relay${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)
@@ -326,44 +315,18 @@ class _ContactTraceSheetState extends State<ContactTraceSheet> {
   }
 
   List<_RouteDisplayEntry> _displayRouteEntries(_ContactTraceResult trace) {
-    final entries = <_RouteDisplayEntry>[];
-    if (trace.sender.node != null) {
-      entries.add(
-        _RouteDisplayEntry.fromResolved(
-          trace.sender,
-          target: const _RouteEntryTarget.sender(),
-        ),
+    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),
       );
-    }
-    entries.addAll(
-      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),
-        );
-      }),
-    );
-    if (trace.recipient.node != null) {
-      entries.add(
-        _RouteDisplayEntry.fromResolved(
-          trace.recipient,
-          target: const _RouteEntryTarget.recipient(),
-        ),
-      );
-    }
-    return entries;
-  }
-
-  String _routeRoleLabel(int index, int total) {
-    if (index == 0) return 'Sender';
-    if (index == total - 1) return 'Recipient';
-    return 'Relay';
+    }).toList();
   }
 
   String _prefixKeyLabel(String publicKey) =>
@@ -527,20 +490,6 @@ class _ContactTraceResult {
 
   _ContactTraceResult cycleEntry(_RouteEntryTarget target) {
     switch (target.kind) {
-      case _RouteEntryKind.sender:
-        return _ContactTraceResult(
-          sender: sender.cycle(),
-          recipient: recipient,
-          routeHashes: routeHashes,
-          matchedRelayNodes: matchedRelayNodes,
-        );
-      case _RouteEntryKind.recipient:
-        return _ContactTraceResult(
-          sender: sender,
-          recipient: recipient.cycle(),
-          routeHashes: routeHashes,
-          matchedRelayNodes: matchedRelayNodes,
-        );
       case _RouteEntryKind.relayNode:
         final updated = matchedRelayNodes.toList();
         updated[target.index] = updated[target.index].cycle();
@@ -570,26 +519,9 @@ class _RouteDisplayEntry {
   });
 
   MeshMapNode? get node => resolved.node;
-
-  factory _RouteDisplayEntry.fromResolved(
-    ResolvedTraceNode resolved, {
-    required _RouteEntryTarget target,
-  }) {
-    final node = resolved.node!;
-    return _RouteDisplayEntry(
-      resolved: resolved,
-      label: node.name,
-      keyLabel: node.publicKey.substring(
-        0,
-        math.min(12, node.publicKey.length),
-      ),
-      matchSummary: resolved.matchSummary,
-      target: target,
-    );
-  }
 }
 
-enum _RouteEntryKind { sender, recipient, relayNode }
+enum _RouteEntryKind { relayNode }
 
 class _RouteEntryTarget {
   final _RouteEntryKind kind;
@@ -597,8 +529,6 @@ class _RouteEntryTarget {
 
   const _RouteEntryTarget._(this.kind, [this.index = 0]);
 
-  const _RouteEntryTarget.sender() : this._(_RouteEntryKind.sender);
-  const _RouteEntryTarget.recipient() : this._(_RouteEntryKind.recipient);
   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,
@@ -576,6 +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: ${widget.message.roundTripTimeMs ?? '-'}',
@@ -846,6 +849,12 @@ class _MessageBubbleState extends State<MessageBubble> {
                                   receptionDetails!.postTransmitDelayMs!,
                                 ),
                               ),
+                            if (widget.receivedCopies > 1)
+                              _detailRow(
+                                context,
+                                label: 'Received copies',
+                                value: '${widget.receivedCopies}',
+                              ),
                             if (widget.message.suggestedTimeoutMs != null)
                               _detailRow(
                                 context,

lib/widgets/messages/message_trace_sheet.dart

@@ -17,9 +17,24 @@ 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();
@@ -40,20 +55,27 @@ class _MessageTraceSheetState extends State<MessageTraceSheet> {
     final contactsProvider = context.read<ContactsProvider>();
     final messagesProvider = context.read<MessagesProvider>();
     final preferredHashSize = await RouteHashPreferences.getHashSize();
-    final storedPath = messagesProvider
-        .getMessageReceptionDetails(widget.message.id)
-        ?.pathBytes;
-    final packetPath = (storedPath != null && storedPath.isNotEmpty)
-        ? storedPath
-        : _extractPathFromPacketLogs(
-            logs: connectionProvider.bleService.packetLogs,
-            message: widget.message,
-          );
+    List<int>? packetPath = widget.packetPathOverride;
+    String? senderPrefix;
+    String? recipientPrefix;
+
+    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 senderPrefix = _toPrefixHex(widget.message.senderPublicKeyPrefix);
-    final recipientPrefix = widget.message.recipientPublicKey != null
-        ? _toPrefixHex(widget.message.recipientPublicKey)
-        : _toPrefixHex(connectionProvider.deviceInfo.publicKey);
     final localNodes = _localNodesFromContacts(contactsProvider);
     final localPublicKeys = localNodes.map((node) => node.publicKey).toSet();
     var trace = _buildTraceResult(
@@ -66,7 +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;
     }
@@ -153,9 +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,
                   ),
                 ),
@@ -222,14 +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(
                                                       '${entry.key + 1}',
                                                       style: const TextStyle(
@@ -259,18 +277,19 @@ class _MessageTraceSheetState extends State<MessageTraceSheet> {
                       Padding(
                         padding: const EdgeInsets.symmetric(horizontal: 16),
                         child: Text(
-                          'Route',
+                          'Relay path',
                           style: Theme.of(context).textTheme.titleMedium,
                         ),
                       ),
                       if (routeEntries.isEmpty)
-                        const Padding(
-                          padding: EdgeInsets.symmetric(
+                        Padding(
+                          padding: const EdgeInsets.symmetric(
                             horizontal: 16,
                             vertical: 8,
                           ),
                           child: Text(
-                            'No named nodes could be matched for this trace.',
+                            widget.noRelayMatchTextOverride ??
+                                'No named nodes could be matched for this trace.',
                           ),
                         ),
                       ...routeEntries.asMap().entries.map(
@@ -286,11 +305,7 @@ class _MessageTraceSheetState extends State<MessageTraceSheet> {
                               : null,
                           leading: CircleAvatar(
                             radius: 14,
-                            backgroundColor: entry.key == 0
-                                ? Colors.green
-                                : (entry.key == routeEntries.length - 1
-                                      ? Colors.red
-                                      : Colors.blue),
+                            backgroundColor: Colors.blue,
                             child: Text(
                               '${entry.key + 1}',
                               style: const TextStyle(
@@ -302,7 +317,7 @@ class _MessageTraceSheetState extends State<MessageTraceSheet> {
                           ),
                           title: Text(entry.value.label),
                           subtitle: Text(
-                            '${_routeRoleLabel(entry.key, routeEntries.length)}${entry.value.keyLabel == null ? '' : ' • ${entry.value.keyLabel}'}${entry.value.matchSummary == null ? '' : ' • ${entry.value.matchSummary}'}${entry.value.resolved.cycleSummary == null ? '' : ' • ${entry.value.resolved.cycleSummary}'}',
+                            'Relay${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)
@@ -356,6 +371,9 @@ class _MessageTraceSheetState extends State<MessageTraceSheet> {
     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);
     }
@@ -365,28 +383,8 @@ class _MessageTraceSheetState extends State<MessageTraceSheet> {
   }
 
   List<_RouteDisplayEntry> _displayRouteEntries(_TraceResult trace) {
-    final pathNodes = trace.matchedPathNodes
-        .map((entry) => entry.node)
-        .whereType<MeshMapNode>()
-        .toList();
-    if (pathNodes.isEmpty) {
-      return [
-        if (trace.sender.node != null)
-          _RouteDisplayEntry.fromResolved(
-            trace.sender,
-            target: const _RouteEntryTarget.sender(),
-          ),
-        if (trace.recipient.node != null &&
-            trace.recipient.node!.publicKey != trace.sender.node?.publicKey)
-          _RouteDisplayEntry.fromResolved(
-            trace.recipient,
-            target: const _RouteEntryTarget.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(
           resolved: entry.value,
@@ -398,54 +396,24 @@ class _MessageTraceSheetState extends State<MessageTraceSheet> {
           target: _RouteEntryTarget.pathNode(entry.key),
         );
       }).toList();
-      final lastKey = pathNodes.last.publicKey;
-      return [
-        ...entries,
-        if (trace.recipient.node != null &&
-            trace.recipient.node!.publicKey != lastKey)
-          _RouteDisplayEntry.fromResolved(
-            trace.recipient,
-            target: const _RouteEntryTarget.recipient(),
-          ),
-      ];
     }
 
-    final firstKey = pathNodes.first.publicKey;
-    final lastKey = pathNodes.last.publicKey;
-    return [
-      if (trace.sender.node != null && trace.sender.node!.publicKey != firstKey)
-        _RouteDisplayEntry.fromResolved(
-          trace.sender,
-          target: const _RouteEntryTarget.sender(),
-        ),
-      ...trace.matchedPathNodes
-          .asMap()
-          .entries
-          .where((entry) => entry.value.node != null)
-          .map(
-            (entry) => _RouteDisplayEntry.fromResolved(
-              entry.value,
-              target: _RouteEntryTarget.pathNode(entry.key),
-            ),
+    return trace.matchedPathNodes
+        .asMap()
+        .entries
+        .where((entry) => entry.value.node != null)
+        .map(
+          (entry) => _RouteDisplayEntry.fromResolved(
+            entry.value,
+            target: _RouteEntryTarget.pathNode(entry.key),
           ),
-      if (trace.recipient.node != null &&
-          trace.recipient.node!.publicKey != lastKey)
-        _RouteDisplayEntry.fromResolved(
-          trace.recipient,
-          target: const _RouteEntryTarget.recipient(),
-        ),
-    ];
+        )
+        .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;
@@ -521,7 +489,7 @@ class _MessageTraceSheetState extends State<MessageTraceSheet> {
       final hopHashes = LogRxRouteDecoder.splitHopHashes(
         packetPath,
         hashSize: hashSize,
-      ).reversed.toList();
+      );
       final matched = _matchNodesFromPathHashes(
         nodes: nodes,
         localPublicKeys: localPublicKeys,
@@ -549,7 +517,7 @@ class _MessageTraceSheetState extends State<MessageTraceSheet> {
       nodes: nodes,
       sender: senderNode.node,
       recipient: recipientNode.node,
-      relayCount: math.max(0, widget.message.pathLen),
+      relayCount: math.max(0, widget.message!.pathLen),
     );
     final matchedPathNodes = <ResolvedTraceNode>[
       if (senderNode.node != null) senderNode,
@@ -731,22 +699,6 @@ class _TraceResult {
 
   _TraceResult cycleEntry(_RouteEntryTarget target) {
     switch (target.kind) {
-      case _RouteEntryKind.sender:
-        return _TraceResult(
-          mode: mode,
-          sender: sender.cycle(),
-          recipient: recipient,
-          pathHashes: pathHashes,
-          matchedPathNodes: matchedPathNodes,
-        );
-      case _RouteEntryKind.recipient:
-        return _TraceResult(
-          mode: mode,
-          sender: sender,
-          recipient: recipient.cycle(),
-          pathHashes: pathHashes,
-          matchedPathNodes: matchedPathNodes,
-        );
       case _RouteEntryKind.pathNode:
         final updated = matchedPathNodes.toList();
         updated[target.index] = updated[target.index].cycle();
@@ -796,7 +748,7 @@ class _RouteDisplayEntry {
   }
 }
 
-enum _RouteEntryKind { sender, recipient, pathNode }
+enum _RouteEntryKind { pathNode }
 
 class _RouteEntryTarget {
   final _RouteEntryKind kind;
@@ -804,8 +756,6 @@ class _RouteEntryTarget {
 
   const _RouteEntryTarget._(this.kind, [this.index = 0]);
 
-  const _RouteEntryTarget.sender() : this._(_RouteEntryKind.sender);
-  const _RouteEntryTarget.recipient() : this._(_RouteEntryKind.recipient);
   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

@@ -2,13 +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;
@@ -84,11 +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

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: "461f010"
-      resolved-ref: "461f010a2f1fcd343357c152228891e295d391be"
+      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: 2026.0313.2+29
+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: "461f010"
+      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/contacts_provider_test.dart

@@ -137,11 +137,12 @@ void main() {
     });
 
     test(
-      'retains last valid gps for any contact when telemetry gps is invalid or missing',
+      'clears telemetry gps on refresh when gps is invalid or missing but keeps fallback display location',
       () {
         final contactTypes = <ContactType>[
           ContactType.chat,
           ContactType.repeater,
+          ContactType.sensor,
           ContactType.room,
           ContactType.channel,
         ];
@@ -164,23 +165,24 @@ void main() {
           );
           scopedProvider.updateTelemetry(scopedKey.sublist(0, 6), validGps);
 
-          // No GPS frame should keep previous valid GPS.
+          // No GPS frame should clear telemetry GPS but keep the last known
+          // contact location as display fallback.
           final batteryOnly = CayenneLppParser.createBatteryData(3.8);
           scopedProvider.updateTelemetry(scopedKey.sublist(0, 6), batteryOnly);
 
           var updated = scopedProvider.findContactByKey(scopedKey)!;
           expect(updated.telemetry, isNotNull);
-          expect(updated.telemetry!.gpsLocation, isNotNull);
+          expect(updated.telemetry!.gpsLocation, isNull);
           expect(
-            updated.telemetry!.gpsLocation!.latitude,
+            updated.displayLocation!.latitude,
             closeTo(45.1234, 0.0001),
           );
           expect(
-            updated.telemetry!.gpsLocation!.longitude,
+            updated.displayLocation!.longitude,
             closeTo(13.8765, 0.0001),
           );
 
-          // Invalid 0,0 GPS frame should also keep previous valid GPS.
+          // Invalid 0,0 GPS frame should behave the same way.
           final invalidGps = CayenneLppParser.createGpsData(
             latitude: 0.0,
             longitude: 0.0,
@@ -189,13 +191,13 @@ void main() {
 
           updated = scopedProvider.findContactByKey(scopedKey)!;
           expect(updated.telemetry, isNotNull);
-          expect(updated.telemetry!.gpsLocation, isNotNull);
+          expect(updated.telemetry!.gpsLocation, isNull);
           expect(
-            updated.telemetry!.gpsLocation!.latitude,
+            updated.displayLocation!.latitude,
             closeTo(45.1234, 0.0001),
           );
           expect(
-            updated.telemetry!.gpsLocation!.longitude,
+            updated.displayLocation!.longitude,
             closeTo(13.8765, 0.0001),
           );
         }
@@ -335,7 +337,7 @@ void main() {
       expect(updated.telemetry!.extraSensorData, containsPair('co2', 415.0));
     });
 
-    test('retains prior telemetry fields across sparse telemetry updates', () {
+    test('retains scalar telemetry but wipes stale extra sensor fields on refresh', () {
       final fullTelemetry = ContactTelemetry(
         gpsLocation: const LatLng(46.0569, 14.5058),
         batteryPercentage: 54.0,
@@ -359,13 +361,70 @@ void main() {
 
       final updated = provider.findContactByKey(publicKey)!;
       expect(updated.telemetry, isNotNull);
-      expect(updated.telemetry!.gpsLocation, const LatLng(46.0569, 14.5058));
+      expect(updated.telemetry!.gpsLocation, isNull);
+      expect(updated.displayLocation, const LatLng(46.0569, 14.5058));
       expect(updated.telemetry!.batteryMilliVolts, isNotNull);
       expect(updated.telemetry!.batteryPercentage, isNotNull);
       expect(updated.telemetry!.temperature, equals(19.5));
       expect(updated.telemetry!.humidity, equals(58.0));
       expect(updated.telemetry!.pressure, equals(1011.2));
-      expect(updated.telemetry!.extraSensorData, containsPair('pm25', 8.0));
+      expect(
+        updated.telemetry!.extraSensorData,
+        containsPair('__source_channel:battery', 0),
+      );
+      expect(
+        updated.telemetry!.extraSensorData,
+        containsPair('__source_channel:voltage', 0),
+      );
+      expect(updated.telemetry!.extraSensorData, isNot(contains('pm25')));
+    });
+
+    test('replaces old source-channel mappings when a metric moves channels', () {
+      final initialTelemetry = ContactTelemetry(
+        gpsLocation: null,
+        batteryPercentage: null,
+        batteryMilliVolts: null,
+        temperature: 21.5,
+        timestamp: DateTime.now().subtract(const Duration(minutes: 2)),
+        humidity: null,
+        pressure: null,
+        extraSensorData: const {
+          '__source_channel:temperature': 2,
+          'temperature_2': 21.5,
+          'humidity_4': 66.0,
+        },
+      );
+
+      provider.addOrUpdateContact(
+        createContact(
+          key: publicKey,
+          type: ContactType.chat,
+        ).copyWith(telemetry: initialTelemetry),
+      );
+
+      final movedChannelTelemetry = CayenneLppParser.createTemperatureData(
+        23.5,
+        channel: 3,
+      );
+
+      provider.updateTelemetry(publicKey.sublist(0, 6), movedChannelTelemetry);
+
+      final updated = provider.findContactByKey(publicKey)!;
+      expect(updated.telemetry, isNotNull);
+      expect(updated.telemetry!.temperature, closeTo(23.5, 0.1));
+      expect(
+        updated.telemetry!.extraSensorData,
+        containsPair('__source_channel:temperature', 3),
+      );
+      expect(
+        updated.telemetry!.extraSensorData,
+        containsPair('temperature_3', closeTo(23.5, 0.1)),
+      );
+      expect(
+        updated.telemetry!.extraSensorData,
+        isNot(contains('temperature_2')),
+      );
+      expect(updated.telemetry!.extraSensorData, isNot(contains('humidity_4')));
     });
 
     test('builds message snapshot from latest valid telemetry', () {

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';
@@ -347,6 +348,88 @@ void main() {
       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/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

@@ -57,6 +57,25 @@ void main() {
     );
   }
 
+  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 [],
@@ -192,4 +211,14 @@ void main() {
     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

@@ -115,9 +115,15 @@ void main() {
 
     expect(find.text('1 pkt/min'), findsOneWidget);
     expect(find.text('Device total 7'), findsOneWidget);
-    expect(find.text('Response'), findsWidgets);
+    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', (
@@ -174,6 +180,6 @@ void main() {
     await tester.pump();
 
     expect(find.text('No packets for this filter'), findsNothing);
-    expect(find.textContaining('3 bytes'), findsOneWidget);
+    expect(find.textContaining('Size: 3 bytes'), findsOneWidget);
   });
 }

test/screens/messages_tab_test.dart

@@ -1,6 +1,7 @@
 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';
@@ -16,10 +17,34 @@ 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({});
   });
@@ -104,4 +129,83 @@ void main() {
     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/message_storage_service_test.dart

@@ -43,9 +43,11 @@ void main() {
       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]);
     },
   );
 
@@ -76,6 +78,7 @@ void main() {
           senderToReceiptMs: 1200,
           estimatedTransmitMs: 800,
           postTransmitDelayMs: 400,
+          receivedCopies: 3,
         ),
       },
     );
@@ -93,6 +96,7 @@ void main() {
     expect(restored.senderToReceiptMs, 1200);
     expect(restored.estimatedTransmitMs, 800);
     expect(restored.postTransmitDelayMs, 400);
+    expect(restored.receivedCopies, 3);
     expect(
       restored.packetLoggedAt,
       DateTime.fromMillisecondsSinceEpoch(1700000100400),

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/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

@@ -10,6 +10,7 @@ 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';
 
@@ -40,14 +41,21 @@ void main() {
     );
   }
 
-  Future<void> pumpTile(WidgetTester tester, Contact contact) async {
+  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(create: (_) => SensorsProvider()),
+          ChangeNotifierProvider<SensorsProvider>.value(
+            value: resolvedSensorsProvider,
+          ),
           ChangeNotifierProvider(create: (_) => MapProvider()),
         ],
         child: MaterialApp(
@@ -104,4 +112,82 @@ void main() {
     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/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);
+  });
+}