Investigate REQ PATH usage

.gitignore

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

ios/Runner.xcodeproj/project.pbxproj

@@ -489,7 +489,7 @@
 			buildSettings = {
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				CLANG_ENABLE_MODULES = YES;
-				CURRENT_PROJECT_VERSION = 111;
+				CURRENT_PROJECT_VERSION = 112;
 				DEVELOPMENT_TEAM = JND55328G8;
 				ENABLE_BITCODE = NO;
 				INFOPLIST_FILE = Runner/Info.plist;
@@ -511,7 +511,7 @@
 			buildSettings = {
 				BUNDLE_LOADER = "$(TEST_HOST)";
 				CODE_SIGN_STYLE = Automatic;
-				CURRENT_PROJECT_VERSION = 111;
+				CURRENT_PROJECT_VERSION = 112;
 				DEVELOPMENT_TEAM = JND55328G8;
 				GENERATE_INFOPLIST_FILE = YES;
 				MARKETING_VERSION = 1.0;
@@ -530,7 +530,7 @@
 			buildSettings = {
 				BUNDLE_LOADER = "$(TEST_HOST)";
 				CODE_SIGN_STYLE = Automatic;
-				CURRENT_PROJECT_VERSION = 111;
+				CURRENT_PROJECT_VERSION = 112;
 				DEVELOPMENT_TEAM = JND55328G8;
 				GENERATE_INFOPLIST_FILE = YES;
 				MARKETING_VERSION = 1.0;
@@ -547,7 +547,7 @@
 			buildSettings = {
 				BUNDLE_LOADER = "$(TEST_HOST)";
 				CODE_SIGN_STYLE = Automatic;
-				CURRENT_PROJECT_VERSION = 111;
+				CURRENT_PROJECT_VERSION = 112;
 				DEVELOPMENT_TEAM = JND55328G8;
 				GENERATE_INFOPLIST_FILE = YES;
 				MARKETING_VERSION = 1.0;
@@ -679,7 +679,7 @@
 			buildSettings = {
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				CLANG_ENABLE_MODULES = YES;
-				CURRENT_PROJECT_VERSION = 111;
+				CURRENT_PROJECT_VERSION = 112;
 				DEVELOPMENT_TEAM = JND55328G8;
 				ENABLE_BITCODE = NO;
 				INFOPLIST_FILE = Runner/Info.plist;
@@ -702,7 +702,7 @@
 			buildSettings = {
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				CLANG_ENABLE_MODULES = YES;
-				CURRENT_PROJECT_VERSION = 111;
+				CURRENT_PROJECT_VERSION = 112;
 				DEVELOPMENT_TEAM = JND55328G8;
 				ENABLE_BITCODE = NO;
 				INFOPLIST_FILE = Runner/Info.plist;

ios/Runner/Info.plist

@@ -43,7 +43,7 @@
 	<key>CFBundleSignature</key>
 	<string>????</string>
 	<key>CFBundleVersion</key>
-	<string>111</string>
+	<string>112</string>
 	<key>LSRequiresIPhoneOS</key>
 	<true/>
 	<key>ITSAppUsesNonExemptEncryption</key>

ios/fastlane/report.xml

@@ -5,22 +5,22 @@
     
     
       
-      <testcase classname="fastlane.lanes" name="0: default_platform" time="0.000256">
+      <testcase classname="fastlane.lanes" name="0: default_platform" time="0.00029">
         
       </testcase>
     
       
-      <testcase classname="fastlane.lanes" name="1: increment_build_number" time="0.924905">
+      <testcase classname="fastlane.lanes" name="1: increment_build_number" time="0.339599">
         
       </testcase>
     
       
-      <testcase classname="fastlane.lanes" name="2: build_app" time="113.366384">
+      <testcase classname="fastlane.lanes" name="2: build_app" time="116.294416">
         
       </testcase>
     
       
-      <testcase classname="fastlane.lanes" name="3: upload_to_app_store" time="755.542625">
+      <testcase classname="fastlane.lanes" name="3: upload_to_app_store" time="441.763052">
         
       </testcase>
     

lib/models/contact_group.dart

@@ -0,0 +1,31 @@
+class SavedContactGroup {
+  final String id;
+  final String sectionKey;
+  final String label;
+  final String query;
+  final DateTime createdAt;
+
+  const SavedContactGroup({
+    required this.id,
+    required this.sectionKey,
+    required this.label,
+    required this.query,
+    required this.createdAt,
+  });
+
+  SavedContactGroup copyWith({
+    String? id,
+    String? sectionKey,
+    String? label,
+    String? query,
+    DateTime? createdAt,
+  }) {
+    return SavedContactGroup(
+      id: id ?? this.id,
+      sectionKey: sectionKey ?? this.sectionKey,
+      label: label ?? this.label,
+      query: query ?? this.query,
+      createdAt: createdAt ?? this.createdAt,
+    );
+  }
+}

lib/models/path_history.dart

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

lib/providers/app_provider.dart

@@ -91,6 +91,12 @@ class AppProvider with ChangeNotifier {
   bool get isVoiceCompressorEnabled => _isVoiceCompressorEnabled;
   bool _isVoiceLimiterEnabled = true;
   bool get isVoiceLimiterEnabled => _isVoiceLimiterEnabled;
+  bool _isVoiceAutoGainEnabled = false;
+  bool get isVoiceAutoGainEnabled => _isVoiceAutoGainEnabled;
+  bool _isVoiceEchoCancellationEnabled = false;
+  bool get isVoiceEchoCancellationEnabled => _isVoiceEchoCancellationEnabled;
+  bool _isVoiceNoiseSuppressionEnabled = false;
+  bool get isVoiceNoiseSuppressionEnabled => _isVoiceNoiseSuppressionEnabled;
   double _messageFontScale = 1.0;
   double get messageFontScale => _messageFontScale;
   bool _autoAddDiscoveredContacts = false;
@@ -142,6 +148,8 @@ class AppProvider with ChangeNotifier {
     required this.imageProvider,
   }) {
     _setupCallbacks();
+    connectionProvider.canStartAutomaticMessageSyncCallback =
+        _canStartAutomaticMessageSync;
     _wasDeviceConnected = connectionProvider.deviceInfo.isConnected;
     _initializeLocationTracking();
     _loadMapEnabled();
@@ -151,6 +159,9 @@ class AppProvider with ChangeNotifier {
     _loadVoiceBandPassFilterEnabled();
     _loadVoiceCompressorEnabled();
     _loadVoiceLimiterEnabled();
+    _loadVoiceAutoGainEnabled();
+    _loadVoiceEchoCancellationEnabled();
+    _loadVoiceNoiseSuppressionEnabled();
     _loadMessageFontScale();
     _loadAutoAddDiscoveredContacts();
     _loadMessagingRouteSettings();
@@ -439,6 +450,72 @@ class AppProvider with ChangeNotifier {
     }
   }
 
+  Future<void> _loadVoiceAutoGainEnabled() async {
+    try {
+      final prefs = await SharedPreferences.getInstance();
+      _isVoiceAutoGainEnabled =
+          prefs.getBool('voice_auto_gain_enabled') ?? false;
+      notifyListeners();
+    } catch (e) {
+      debugPrint('Error loading voice auto gain setting: $e');
+    }
+  }
+
+  Future<void> toggleVoiceAutoGainEnabled(bool enabled) async {
+    try {
+      _isVoiceAutoGainEnabled = enabled;
+      final prefs = await SharedPreferences.getInstance();
+      await prefs.setBool('voice_auto_gain_enabled', enabled);
+      notifyListeners();
+    } catch (e) {
+      debugPrint('Error saving voice auto gain setting: $e');
+    }
+  }
+
+  Future<void> _loadVoiceEchoCancellationEnabled() async {
+    try {
+      final prefs = await SharedPreferences.getInstance();
+      _isVoiceEchoCancellationEnabled =
+          prefs.getBool('voice_echo_cancellation_enabled') ?? false;
+      notifyListeners();
+    } catch (e) {
+      debugPrint('Error loading voice echo cancellation setting: $e');
+    }
+  }
+
+  Future<void> toggleVoiceEchoCancellationEnabled(bool enabled) async {
+    try {
+      _isVoiceEchoCancellationEnabled = enabled;
+      final prefs = await SharedPreferences.getInstance();
+      await prefs.setBool('voice_echo_cancellation_enabled', enabled);
+      notifyListeners();
+    } catch (e) {
+      debugPrint('Error saving voice echo cancellation setting: $e');
+    }
+  }
+
+  Future<void> _loadVoiceNoiseSuppressionEnabled() async {
+    try {
+      final prefs = await SharedPreferences.getInstance();
+      _isVoiceNoiseSuppressionEnabled =
+          prefs.getBool('voice_noise_suppression_enabled') ?? false;
+      notifyListeners();
+    } catch (e) {
+      debugPrint('Error loading voice noise suppression setting: $e');
+    }
+  }
+
+  Future<void> toggleVoiceNoiseSuppressionEnabled(bool enabled) async {
+    try {
+      _isVoiceNoiseSuppressionEnabled = enabled;
+      final prefs = await SharedPreferences.getInstance();
+      await prefs.setBool('voice_noise_suppression_enabled', enabled);
+      notifyListeners();
+    } catch (e) {
+      debugPrint('Error saving voice noise suppression setting: $e');
+    }
+  }
+
   Future<void> _loadMessageFontScale() async {
     try {
       final prefs = await SharedPreferences.getInstance();
@@ -775,7 +852,6 @@ class AppProvider with ChangeNotifier {
       final receivedPathBytes = receptionDetailsSnapshot?.pathBytes;
       if (senderContact != null &&
           enrichedMessage.isChannelMessage &&
-          (enrichedMessage.channelIdx ?? 0) == 0 &&
           receivedPathBytes != null &&
           receivedPathBytes.isNotEmpty) {
         unawaited(
@@ -1180,6 +1256,7 @@ class AppProvider with ChangeNotifier {
       debugPrint(
         '📡 [AppProvider] Advertisement received: ${publicKey.sublist(0, 6).map((b) => b.toRadixString(16).padLeft(2, '0')).join(':')}...',
       );
+      unawaited(_retainAdvertRxPath(publicKey));
       // Check if this is an existing contact that might have updated location
       final contact = contactsProvider.findContactByKey(publicKey);
       if (contact != null) {
@@ -1293,6 +1370,9 @@ class AppProvider with ChangeNotifier {
             retryAttempt: retryAttempt,
           );
         };
+    connectionProvider.resolveContactForDmCallback = (contactPublicKey) {
+      return contactsProvider.findContactByKey(contactPublicKey);
+    };
     messagesProvider.onFinalRouterFallbackCallback =
         ({required messageId, required contact, required message}) async {
           return _sendWithFinalNearestRouterFallback(
@@ -1321,6 +1401,9 @@ class AppProvider with ChangeNotifier {
             roundTripTimeMs: roundTripTimeMs,
           );
         };
+    messagesProvider.onManualRetryPreparedCallback = (messageId) {
+      _directMessageRouteSessions.remove(messageId);
+    };
   }
 
   Future<Contact> _prepareDirectMessageSend({
@@ -1583,6 +1666,38 @@ class AppProvider with ChangeNotifier {
     );
   }
 
+  Future<void> _retainAdvertRxPath(Uint8List publicKey) async {
+    final decoded = _findBestMatchingAdvertRxRoute(publicKey);
+    if (decoded == null || decoded.pathBytes.isEmpty) {
+      return;
+    }
+
+    final reversedPathBytes = LogRxRouteDecoder.reverseHopBytes(
+      decoded.pathBytes,
+      hashSize: decoded.hashSize,
+    );
+    final reversedHopHashes = LogRxRouteDecoder.splitHopHashes(
+      reversedPathBytes,
+      hashSize: decoded.hashSize,
+    );
+
+    final parsedRoute = ContactRouteCodec.parse(
+      reversedHopHashes.join(','),
+      expectedHashSize: decoded.hashSize,
+    );
+    contactsProvider.retainReceivedRoute(
+      publicKey,
+      signedEncodedPathLen: parsedRoute.signedEncodedPathLen,
+      paddedPathBytes: parsedRoute.paddedPathBytes,
+      devicePublicKey: connectionProvider.deviceInfo.publicKey,
+    );
+    await _pathHistoryService.recordReceivedBytePath(
+      publicKey.map((byte) => byte.toRadixString(16).padLeft(2, '0')).join(),
+      decoded.pathBytes,
+      decoded.hashSize,
+    );
+  }
+
   int _inferReceivedPathHashSize(
     List<int> pathBytes, {
     required int preferredHashSize,
@@ -1604,6 +1719,8 @@ class AppProvider with ChangeNotifier {
     if (!connectionProvider.deviceInfo.isConnected) return;
 
     try {
+      _isReconnectSyncInProgress = true;
+      _hasCompletedConnectionBootstrap = false;
       // Initialize contacts provider with device public key to exclude self
       // If already initialized (from early load), this will just filter out self-contact
       // This must happen before getContacts to ensure proper filtering
@@ -1655,7 +1772,9 @@ class AppProvider with ChangeNotifier {
       debugPrint(
         '🔄 [AppProvider] Performing initial message sync (fallback for missed pushes)',
       );
-      final initialMessageCount = await connectionProvider.syncAllMessages();
+      final initialMessageCount = await connectionProvider.syncAllMessages(
+        force: true,
+      );
       debugPrint(
         '📥 [AppProvider] Initial sync retrieved $initialMessageCount message(s)',
       );
@@ -1677,19 +1796,26 @@ class AppProvider with ChangeNotifier {
 
       _hasCompletedConnectionBootstrap = true;
       _wasDeviceConnected = connectionProvider.deviceInfo.isConnected;
+      await _flushDeferredAutomaticMessageSync();
       notifyListeners();
     } catch (e) {
       debugPrint('Initialization error: $e');
+    } finally {
+      _isReconnectSyncInProgress = false;
     }
   }
 
-  Future<void> _syncAfterReconnect() async {
-    if (_isReconnectSyncInProgress ||
-        !connectionProvider.deviceInfo.isConnected) {
+  Future<void> _syncAfterReconnect({bool started = false}) async {
+    if (!connectionProvider.deviceInfo.isConnected) {
       return;
     }
 
-    _isReconnectSyncInProgress = true;
+    if (!started) {
+      if (_isReconnectSyncInProgress) {
+        return;
+      }
+      _isReconnectSyncInProgress = true;
+    }
     try {
       debugPrint(
         '🔄 [AppProvider] Device reconnected - syncing contacts and missed messages',
@@ -1700,14 +1826,19 @@ class AppProvider with ChangeNotifier {
       );
       await connectionProvider.getContacts();
 
-      final messageCount = await connectionProvider.syncAllMessages();
+      final messageCount = await connectionProvider.syncAllMessages(
+        force: true,
+      );
       debugPrint(
         '📥 [AppProvider] Reconnect sync retrieved $messageCount message(s)',
       );
     } catch (e) {
       debugPrint('❌ [AppProvider] Reconnect sync error: $e');
     } finally {
+      _hasCompletedConnectionBootstrap =
+          connectionProvider.deviceInfo.isConnected;
       _isReconnectSyncInProgress = false;
+      await _flushDeferredAutomaticMessageSync();
     }
   }
 
@@ -2629,6 +2760,37 @@ class AppProvider with ChangeNotifier {
     return bestLog;
   }
 
+  DecodedLogRxRoute? _findBestMatchingAdvertRxRoute(Uint8List publicKey) {
+    final publicKeyHex = publicKey
+        .map((byte) => byte.toRadixString(16).padLeft(2, '0'))
+        .join()
+        .toLowerCase();
+
+    DecodedLogRxRoute? bestRoute;
+    var bestDeltaMs = 999999999;
+    final now = DateTime.now();
+
+    for (final log in connectionProvider.bleService.packetLogs) {
+      if (log.responseCode != 0x88) continue;
+      if (log.rawData.length < 6) continue;
+
+      final decoded = LogRxRouteDecoder.decode(log.rawData);
+      if (decoded == null) continue;
+      if (decoded.payloadType != 0x04) continue;
+      final senderHash = decoded.originalSenderHashHex;
+      if (senderHash == null || !publicKeyHex.startsWith(senderHash)) continue;
+
+      final deltaMs = (log.timestamp.difference(now).inMilliseconds).abs();
+      if (deltaMs < bestDeltaMs) {
+        bestDeltaMs = deltaMs;
+        bestRoute = decoded;
+      }
+    }
+
+    if (bestDeltaMs > 30000) return null;
+    return bestRoute;
+  }
+
   List<int>? _extractPathBytesFromLog(BlePacketLog? log) {
     if (log == null) return null;
     final decoded = LogRxRouteDecoder.decode(log.rawData);
@@ -2668,7 +2830,9 @@ class AppProvider with ChangeNotifier {
       debugPrint(
         '🔄 [AppProvider] Manual message sync requested (user initiated)',
       );
-      final messageCount = await connectionProvider.syncAllMessages();
+      final messageCount = await connectionProvider.syncAllMessages(
+        force: true,
+      );
       debugPrint(
         '✅ [AppProvider] Manual sync completed: $messageCount messages',
       );
@@ -2697,9 +2861,32 @@ class AppProvider with ChangeNotifier {
       _stopLocationTracking();
     }
 
-    if (isConnected && !wasConnected && _hasCompletedConnectionBootstrap) {
-      unawaited(_syncAfterReconnect());
+    if (!isConnected) {
+      connectionProvider.clearPendingAutomaticMessageSync();
     }
+
+    if (isConnected && !wasConnected && _hasCompletedConnectionBootstrap) {
+      _isReconnectSyncInProgress = true;
+      unawaited(_syncAfterReconnect(started: true));
+    }
+  }
+
+  bool _canStartAutomaticMessageSync() {
+    return connectionProvider.deviceInfo.isConnected &&
+        _hasCompletedConnectionBootstrap &&
+        !_isReconnectSyncInProgress;
+  }
+
+  Future<void> _flushDeferredAutomaticMessageSync() async {
+    if (!connectionProvider.hasPendingAutomaticMessageSync ||
+        !_canStartAutomaticMessageSync()) {
+      return;
+    }
+
+    debugPrint(
+      '🔄 [AppProvider] Running deferred automatic message sync after bootstrap',
+    );
+    await connectionProvider.syncAllMessages(force: true);
   }
 
   /// Start location tracking

lib/providers/connection_provider.dart

@@ -185,9 +185,12 @@ class ConnectionProvider with ChangeNotifier {
   onMessageEchoDetected;
   Function(Uint8List publicKeyPrefix, Uint8List statusData)? onStatusResponse;
   Function(Uint8List payload, int snrRaw, int rssiDbm)? onRawDataReceived;
+  Contact? Function(Uint8List contactPublicKey)? resolveContactForDmCallback;
+  bool Function()? canStartAutomaticMessageSyncCallback;
 
   // Track pending send operations for auto-recovery
   final Map<String, _PendingSendOperation> _pendingSendOperations = {};
+  bool _pendingAutomaticMessageSync = false;
 
   ConnectionProvider() {
     _wireServiceCallbacks(_bleService);
@@ -332,6 +335,13 @@ class ConnectionProvider with ChangeNotifier {
         debugPrint('📥 [Provider] MSG_WAITING ignored during spectrum scan');
         return;
       }
+      if (!(canStartAutomaticMessageSyncCallback?.call() ?? true)) {
+        _pendingAutomaticMessageSync = true;
+        debugPrint(
+          '📥 [Provider] MSG_WAITING deferred until connection bootstrap completes',
+        );
+        return;
+      }
       debugPrint('📥 [Provider] MSG_WAITING - auto-syncing');
       if (_isSyncingMessages) {
         _syncRequestedWhileBusy = true;
@@ -1164,6 +1174,7 @@ class ConnectionProvider with ChangeNotifier {
     }
 
     var effectiveContact = contact;
+    effectiveContact ??= resolveContactForDmCallback?.call(contactPublicKey);
     if (messageId != null &&
         effectiveContact != null &&
         prepareDirectMessageSendCallback != null) {
@@ -1892,11 +1903,18 @@ class ConnectionProvider with ChangeNotifier {
   }
 
   /// Sync all waiting messages from device
-  Future<int> syncAllMessages() async {
+  Future<int> syncAllMessages({bool force = false}) async {
     if (_isSpectrumScanActive) {
       debugPrint('⏸️ [Provider] Message sync skipped during spectrum scan');
       return 0;
     }
+    if (!force && !(canStartAutomaticMessageSyncCallback?.call() ?? true)) {
+      _pendingAutomaticMessageSync = true;
+      debugPrint(
+        '⏸️ [Provider] Message sync deferred until connection bootstrap completes',
+      );
+      return 0;
+    }
     if (_isSyncingMessages) {
       // Already syncing; avoid overlapping loops
       _syncRequestedWhileBusy = true;
@@ -1912,6 +1930,7 @@ class ConnectionProvider with ChangeNotifier {
     int totalCount = 0;
 
     try {
+      _pendingAutomaticMessageSync = false;
       _isSyncingMessages = true;
       do {
         _syncRequestedWhileBusy = false;
@@ -2003,6 +2022,12 @@ class ConnectionProvider with ChangeNotifier {
     }
   }
 
+  bool get hasPendingAutomaticMessageSync => _pendingAutomaticMessageSync;
+
+  void clearPendingAutomaticMessageSync() {
+    _pendingAutomaticMessageSync = false;
+  }
+
   /// Login to a room or repeater
   ///
   /// Sends login request with password. Results will be delivered via

lib/providers/contacts_provider.dart

@@ -1,6 +1,8 @@
+import 'dart:math';
 import 'package:flutter/foundation.dart';
 import 'package:latlong2/latlong.dart';
 import '../models/contact.dart';
+import '../models/contact_group.dart';
 import '../models/message_contact_location.dart';
 import '../services/cayenne_lpp_parser.dart';
 import '../services/contact_storage_service.dart';
@@ -10,8 +12,15 @@ import '../utils/key_comparison.dart';
 class PendingAdvert {
   final Uint8List publicKey;
   final DateTime receivedAt;
+  final int? signedEncodedPathLen;
+  final Uint8List? paddedPathBytes;
 
-  const PendingAdvert({required this.publicKey, required this.receivedAt});
+  const PendingAdvert({
+    required this.publicKey,
+    required this.receivedAt,
+    this.signedEncodedPathLen,
+    this.paddedPathBytes,
+  });
 
   String get publicKeyHex =>
       publicKey.map((b) => b.toRadixString(16).padLeft(2, '0')).join('');
@@ -21,17 +30,36 @@ class PendingAdvert {
     return prefix.map((b) => b.toRadixString(16).padLeft(2, '0')).join(':');
   }
 
-  PendingAdvert copyWith({Uint8List? publicKey, DateTime? receivedAt}) {
+  PendingAdvert copyWith({
+    Uint8List? publicKey,
+    DateTime? receivedAt,
+    int? signedEncodedPathLen,
+    Uint8List? paddedPathBytes,
+  }) {
     return PendingAdvert(
       publicKey: publicKey ?? this.publicKey,
       receivedAt: receivedAt ?? this.receivedAt,
+      signedEncodedPathLen: signedEncodedPathLen ?? this.signedEncodedPathLen,
+      paddedPathBytes: paddedPathBytes ?? this.paddedPathBytes,
     );
   }
 }
 
+class _RetainedRoute {
+  final int signedEncodedPathLen;
+  final Uint8List paddedPathBytes;
+
+  const _RetainedRoute({
+    required this.signedEncodedPathLen,
+    required this.paddedPathBytes,
+  });
+}
+
 /// Contacts Provider - manages contact list and telemetry
 class ContactsProvider with ChangeNotifier {
+  static const double _firstHopFallbackOffsetMeters = 100.0;
   final Map<String, Contact> _contacts = {};
+  final List<SavedContactGroup> _savedContactGroups = <SavedContactGroup>[];
   final Map<String, PendingAdvert> _pendingAdverts = {};
   final ContactStorageService _storageService = ContactStorageService();
   bool _isInitialized = false;
@@ -53,6 +81,7 @@ class ContactsProvider with ChangeNotifier {
         '📦 [ContactsProvider] Early loading persisted contacts (no filtering)...',
       );
       final storedContacts = await _storageService.loadContacts();
+      final storedGroups = await _storageService.loadContactGroups();
 
       // Add stored contacts (excluding any with all-zeros public key)
       const publicChannelKey =
@@ -66,8 +95,11 @@ class ContactsProvider with ChangeNotifier {
       }
 
       _isInitialized = true;
+      _savedContactGroups
+        ..clear()
+        ..addAll(storedGroups);
       debugPrint(
-        '✅ [ContactsProvider] Early loaded ${storedContacts.length} persisted contacts',
+        '✅ [ContactsProvider] Early loaded ${storedContacts.length} persisted contacts and ${storedGroups.length} groups',
       );
 
       // Ensure public channel exists after loading
@@ -97,6 +129,7 @@ class ContactsProvider with ChangeNotifier {
       final storedContacts = await _storageService.loadContacts(
         excludePublicKey: devicePublicKey,
       );
+      final storedGroups = await _storageService.loadContactGroups();
 
       // Add stored contacts (excluding any with all-zeros public key)
       const publicChannelKey =
@@ -110,8 +143,11 @@ class ContactsProvider with ChangeNotifier {
       }
 
       _isInitialized = true;
+      _savedContactGroups
+        ..clear()
+        ..addAll(storedGroups);
       debugPrint(
-        '✅ [ContactsProvider] Loaded ${storedContacts.length} persisted contacts',
+        '✅ [ContactsProvider] Loaded ${storedContacts.length} persisted contacts and ${storedGroups.length} groups',
       );
 
       // Ensure public channel exists after loading
@@ -182,10 +218,97 @@ class ContactsProvider with ChangeNotifier {
   }
 
   List<Contact> get contacts => _contacts.values.toList();
+  List<SavedContactGroup> get savedContactGroups =>
+      List<SavedContactGroup>.from(_savedContactGroups)
+        ..sort((a, b) => b.createdAt.compareTo(a.createdAt));
   List<PendingAdvert> get pendingAdverts =>
       _pendingAdverts.values.toList()
         ..sort((a, b) => b.receivedAt.compareTo(a.receivedAt));
 
+  List<SavedContactGroup> savedGroupsForSection(String sectionKey) {
+    return savedContactGroups
+        .where((group) => group.sectionKey == sectionKey)
+        .toList();
+  }
+
+  bool hasSavedGroupForFilter(String sectionKey, String query) {
+    final normalizedQuery = _normalizeGroupQuery(query);
+    if (normalizedQuery.isEmpty) {
+      return false;
+    }
+
+    return _savedContactGroups.any(
+      (group) =>
+          group.sectionKey == sectionKey &&
+          _normalizeGroupQuery(group.query) == normalizedQuery,
+    );
+  }
+
+  Future<void> addSavedGroupForFilter(
+    String sectionKey,
+    String query, {
+    String? label,
+  }) async {
+    final normalizedQuery = _normalizeGroupQuery(query);
+    if (normalizedQuery.isEmpty ||
+        hasSavedGroupForFilter(sectionKey, normalizedQuery)) {
+      return;
+    }
+
+    _savedContactGroups.add(
+      SavedContactGroup(
+        id: '${sectionKey}_${DateTime.now().microsecondsSinceEpoch}',
+        sectionKey: sectionKey,
+        label: (label ?? query).trim(),
+        query: query.trim(),
+        createdAt: DateTime.now(),
+      ),
+    );
+
+    await _persistSavedGroups();
+    notifyListeners();
+  }
+
+  Future<void> removeSavedGroupById(String id) async {
+    final beforeCount = _savedContactGroups.length;
+    _savedContactGroups.removeWhere((group) => group.id == id);
+    if (_savedContactGroups.length == beforeCount) {
+      return;
+    }
+
+    await _persistSavedGroups();
+    notifyListeners();
+  }
+
+  Future<void> removeSavedGroupForFilter(
+    String sectionKey,
+    String query,
+  ) async {
+    final normalizedQuery = _normalizeGroupQuery(query);
+    final beforeCount = _savedContactGroups.length;
+    _savedContactGroups.removeWhere(
+      (group) =>
+          group.sectionKey == sectionKey &&
+          _normalizeGroupQuery(group.query) == normalizedQuery,
+    );
+    if (_savedContactGroups.length == beforeCount) {
+      return;
+    }
+
+    await _persistSavedGroups();
+    notifyListeners();
+  }
+
+  Future<void> _persistSavedGroups() async {
+    try {
+      await _storageService.saveContactGroups(_savedContactGroups);
+    } catch (e) {
+      debugPrint('❌ [ContactsProvider] Error persisting contact groups: $e');
+    }
+  }
+
+  String _normalizeGroupQuery(String query) => query.trim().toLowerCase();
+
   List<Contact> get chatContacts =>
       contacts.where((c) => c.isChat).toList()..sort(_sortByLastSeen);
 
@@ -338,8 +461,42 @@ class ContactsProvider with ChangeNotifier {
     required Contact incomingContact,
     Contact? existingContact,
   }) {
+    final retainedRoute = _retainedRouteForContact(
+      keyHex: incomingContact.publicKeyHex,
+      incomingContact: incomingContact,
+      existingContact: existingContact,
+    );
+    final mergedTelemetry = _mergeTelemetryForContact(
+      existingTelemetry: existingContact?.telemetry,
+      incomingTelemetry: incomingContact.telemetry,
+    );
+    final inferredFallbackLocation = _inferFirstHopFallbackLocation(
+      incomingContact: incomingContact,
+      existingContact: existingContact,
+      retainedRoute: retainedRoute,
+      mergedTelemetry: mergedTelemetry,
+    );
+    final inferredFallbackAdvLat = inferredFallbackLocation != null
+        ? _coordinateToAdvertMicrodegrees(inferredFallbackLocation.latitude)
+        : null;
+    final inferredFallbackAdvLon = inferredFallbackLocation != null
+        ? _coordinateToAdvertMicrodegrees(inferredFallbackLocation.longitude)
+        : null;
+
     if (existingContact == null) {
-      var newContact = incomingContact.copyWith(isNew: true);
+      var newContact = incomingContact.copyWith(
+        isNew: true,
+        telemetry: mergedTelemetry,
+        outPathLen:
+            retainedRoute?.signedEncodedPathLen ?? incomingContact.outPathLen,
+        outPath: retainedRoute?.paddedPathBytes ?? incomingContact.outPath,
+        advLat: incomingContact.advertLocation != null
+            ? incomingContact.advLat
+            : inferredFallbackAdvLat ?? incomingContact.advLat,
+        advLon: incomingContact.advertLocation != null
+            ? incomingContact.advLon
+            : inferredFallbackAdvLon ?? incomingContact.advLon,
+      );
       if (incomingContact.advertLocation != null) {
         final timestamp = DateTime.fromMillisecondsSinceEpoch(
           incomingContact.lastAdvert * 1000,
@@ -352,27 +509,26 @@ class ContactsProvider with ChangeNotifier {
       return newContact;
     }
 
-    final mergedTelemetry = _mergeTelemetryForContact(
-      existingTelemetry: existingContact.telemetry,
-      incomingTelemetry: incomingContact.telemetry,
-    );
     final incomingAdvertLocation = incomingContact.advertLocation;
     final existingAdvertLocation = existingContact.advertLocation;
 
     var updatedContact = incomingContact.copyWith(
-      isNew: existingContact.isNew,
+      isNew: false,
       advertHistory: existingContact.advertHistory,
       telemetry: mergedTelemetry,
+      outPathLen:
+          retainedRoute?.signedEncodedPathLen ?? incomingContact.outPathLen,
+      outPath: retainedRoute?.paddedPathBytes ?? incomingContact.outPath,
       advLat: incomingAdvertLocation != null
           ? incomingContact.advLat
           : existingAdvertLocation != null
           ? existingContact.advLat
-          : incomingContact.advLat,
+          : inferredFallbackAdvLat ?? incomingContact.advLat,
       advLon: incomingAdvertLocation != null
           ? incomingContact.advLon
           : existingAdvertLocation != null
           ? existingContact.advLon
-          : incomingContact.advLon,
+          : inferredFallbackAdvLon ?? incomingContact.advLon,
     );
 
     if (incomingAdvertLocation != null) {
@@ -388,6 +544,145 @@ class ContactsProvider with ChangeNotifier {
     return updatedContact;
   }
 
+  _RetainedRoute? _retainedRouteForContact({
+    required String keyHex,
+    required Contact incomingContact,
+    required Contact? existingContact,
+  }) {
+    if (incomingContact.routeHasPath) {
+      return null;
+    }
+
+    final pendingAdvert = _pendingAdverts[keyHex];
+    final pendingPathBytes = pendingAdvert?.paddedPathBytes;
+    final pendingPathLen = pendingAdvert?.signedEncodedPathLen;
+    if (pendingPathLen != null &&
+        pendingPathBytes != null &&
+        pendingPathBytes.isNotEmpty) {
+      return _RetainedRoute(
+        signedEncodedPathLen: pendingPathLen,
+        paddedPathBytes: Uint8List.fromList(pendingPathBytes),
+      );
+    }
+
+    if (existingContact != null && existingContact.routeHasPath) {
+      return _RetainedRoute(
+        signedEncodedPathLen: existingContact.outPathLen,
+        paddedPathBytes: Uint8List.fromList(existingContact.outPath),
+      );
+    }
+
+    return null;
+  }
+
+  LatLng? _inferFirstHopFallbackLocation({
+    required Contact incomingContact,
+    required Contact? existingContact,
+    required _RetainedRoute? retainedRoute,
+    required ContactTelemetry? mergedTelemetry,
+  }) {
+    if (_getValidGpsOrNull(mergedTelemetry?.gpsLocation) != null) {
+      return null;
+    }
+    if (incomingContact.advertLocation != null ||
+        existingContact?.advertLocation != null) {
+      return null;
+    }
+
+    final routeBytes =
+        retainedRoute?.paddedPathBytes ??
+        (incomingContact.routeHasPath
+            ? incomingContact.routePathBytes
+            : existingContact?.routeHasPath == true
+            ? existingContact!.routePathBytes
+            : null);
+    final routeHashSize = retainedRoute != null
+        ? ((ContactRouteCodec.toUnsignedDescriptor(
+                    retainedRoute.signedEncodedPathLen,
+                  ) >>
+                  6) +
+              1)
+        : incomingContact.routeHasPath
+        ? incomingContact.routeHashSize
+        : existingContact?.routeHasPath == true
+        ? existingContact!.routeHashSize
+        : 0;
+    if (routeBytes == null ||
+        routeHashSize <= 0 ||
+        routeBytes.length < routeHashSize) {
+      return null;
+    }
+
+    final lastHopHex = routeBytes
+        .sublist(routeBytes.length - routeHashSize)
+        .map((byte) => byte.toRadixString(16).padLeft(2, '0'))
+        .join();
+    final repeaterCandidates = _contacts.values.where((candidate) {
+      if (!candidate.isRepeater ||
+          candidate.publicKeyHex == incomingContact.publicKeyHex) {
+        return false;
+      }
+      final location = candidate.displayLocation;
+      return location != null && candidate.publicKeyHex.startsWith(lastHopHex);
+    }).toList()..sort((a, b) => b.lastAdvert.compareTo(a.lastAdvert));
+    if (repeaterCandidates.isEmpty) {
+      return null;
+    }
+
+    final repeaterLocation = repeaterCandidates.first.displayLocation;
+    if (repeaterLocation == null) {
+      return null;
+    }
+
+    final bearingDegrees = _stableFallbackBearingDegrees(incomingContact);
+    return _offsetFromLocation(
+      repeaterLocation,
+      distanceMeters: _firstHopFallbackOffsetMeters,
+      bearingDegrees: bearingDegrees,
+    );
+  }
+
+  double _stableFallbackBearingDegrees(Contact contact) {
+    if (contact.publicKey.length < 2) {
+      return 90.0;
+    }
+    final seed = (contact.publicKey[0] << 8) | contact.publicKey[1];
+    return (seed % 360).toDouble();
+  }
+
+  LatLng _offsetFromLocation(
+    LatLng origin, {
+    required double distanceMeters,
+    required double bearingDegrees,
+  }) {
+    const earthRadiusMeters = 6371000.0;
+    final angularDistance = distanceMeters / earthRadiusMeters;
+    final bearingRadians = bearingDegrees * 3.1415926535897932 / 180.0;
+    final lat1 = origin.latitude * 3.1415926535897932 / 180.0;
+    final lon1 = origin.longitude * 3.1415926535897932 / 180.0;
+
+    final sinLat1 = sin(lat1);
+    final cosLat1 = cos(lat1);
+    final sinAngularDistance = sin(angularDistance);
+    final cosAngularDistance = cos(angularDistance);
+
+    final lat2 = asin(
+      sinLat1 * cosAngularDistance +
+          cosLat1 * sinAngularDistance * cos(bearingRadians),
+    );
+    final lon2 =
+        lon1 +
+        atan2(
+          sin(bearingRadians) * sinAngularDistance * cosLat1,
+          cosAngularDistance - sinLat1 * sin(lat2),
+        );
+
+    return LatLng(
+      lat2 * 180.0 / 3.1415926535897932,
+      ((lon2 * 180.0 / 3.1415926535897932 + 540.0) % 360.0) - 180.0,
+    );
+  }
+
   /// Update contact telemetry
   void updateTelemetry(Uint8List publicKeyPrefix, Uint8List lppData) {
     debugPrint('📊 [ContactsProvider] updateTelemetry() called');
@@ -646,20 +941,74 @@ class ContactsProvider with ChangeNotifier {
     Uint8List publicKey, {
     required int signedEncodedPathLen,
     required Uint8List paddedPathBytes,
+    LatLng? inferredFallbackLocation,
   }) {
     final contact = findContactByKey(publicKey);
     if (contact == null) {
       return;
     }
 
-    _contacts[contact.publicKeyHex] = contact.copyWith(
+    var updatedContact = contact.copyWith(
       outPathLen: signedEncodedPathLen,
       outPath: Uint8List.fromList(paddedPathBytes),
     );
+    if (inferredFallbackLocation != null) {
+      updatedContact = updatedContact
+          .copyWith(
+            advLat: _coordinateToAdvertMicrodegrees(
+              inferredFallbackLocation.latitude,
+            ),
+            advLon: _coordinateToAdvertMicrodegrees(
+              inferredFallbackLocation.longitude,
+            ),
+          )
+          .addAdvertLocation(inferredFallbackLocation, DateTime.now());
+    }
+    _contacts[contact.publicKeyHex] = updatedContact;
     _persistContacts();
     notifyListeners();
   }
 
+  void retainReceivedRoute(
+    Uint8List publicKey, {
+    required int signedEncodedPathLen,
+    required Uint8List paddedPathBytes,
+    Uint8List? devicePublicKey,
+  }) {
+    if (devicePublicKey != null && publicKey.matches(devicePublicKey)) {
+      return;
+    }
+
+    final keyHex = publicKey
+        .map((b) => b.toRadixString(16).padLeft(2, '0'))
+        .join('');
+    final contact = _contacts[keyHex];
+    if (contact != null) {
+      _contacts[keyHex] = contact.copyWith(
+        outPathLen: signedEncodedPathLen,
+        outPath: Uint8List.fromList(paddedPathBytes),
+      );
+      _persistContacts();
+      notifyListeners();
+      return;
+    }
+
+    final now = DateTime.now();
+    final existing = _pendingAdverts[keyHex];
+    _pendingAdverts[keyHex] =
+        (existing ??
+                PendingAdvert(
+                  publicKey: Uint8List.fromList(publicKey),
+                  receivedAt: now,
+                ))
+            .copyWith(
+              receivedAt: now,
+              signedEncodedPathLen: signedEncodedPathLen,
+              paddedPathBytes: Uint8List.fromList(paddedPathBytes),
+            );
+    notifyListeners();
+  }
+
   void resetContactRouteLocal(Uint8List publicKey) {
     final contact = findContactByKey(publicKey);
     if (contact == null) {

lib/providers/messages_provider.dart

@@ -86,6 +86,7 @@ class MessagesProvider with ChangeNotifier {
 
   Future<void> Function({required Contact contact, required int failureStreak})?
   onDirectPathFailedCallback;
+  void Function(String messageId)? onManualRetryPreparedCallback;
   Future<bool> Function({
     required String messageId,
     required Contact contact,
@@ -165,8 +166,12 @@ class MessagesProvider with ChangeNotifier {
 
     final index = _messages.indexWhere((message) => message.id == messageId);
     if (index != -1) {
+      final nextPathLen = selection.hopCount > 0
+          ? selection.hopCount
+          : _messages[index].pathLen;
       _messages[index] = _messages[index].copyWith(
         usedFloodFallback: selection.usesFlood,
+        pathLen: nextPathLen,
       );
     }
 
@@ -2069,6 +2074,7 @@ class MessagesProvider with ChangeNotifier {
     _clearAckHistoryForMessage(messageId);
     _retryManager.clearRetry(messageId);
     _messageRouteMetadata.remove(messageId);
+    onManualRetryPreparedCallback?.call(messageId);
 
     _messages[index] = Message(
       id: message.id,

lib/providers/voice_provider.dart

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

lib/screens/contacts_tab.dart

@@ -4,6 +4,7 @@ import 'package:provider/provider.dart';
 import 'package:geolocator/geolocator.dart';
 import '../l10n/app_localizations.dart';
 import '../models/contact.dart';
+import '../models/contact_group.dart';
 import '../providers/contacts_provider.dart';
 import '../providers/app_provider.dart';
 import '../providers/connection_provider.dart';
@@ -32,6 +33,14 @@ 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.rooms: '',
+    ContactSection.channels: '',
+  };
+  late final Map<ContactSection, TextEditingController> _filterControllers;
   final Map<ContactSection, ContactSortMode> _sortModes = {
     ContactSection.teamMembers: ContactSortMode.lastSeen,
     ContactSection.repeaters: ContactSortMode.lastSeen,
@@ -41,6 +50,10 @@ class _ContactsTabState extends State<ContactsTab> {
   @override
   void initState() {
     super.initState();
+    _filterControllers = {
+      for (final section in ContactSection.values)
+        section: TextEditingController(text: _sectionFilters[section] ?? ''),
+    };
     _getCurrentLocation();
     // Mark all contacts as viewed when tab is opened
     WidgetsBinding.instance.addPostFrameCallback((_) {
@@ -48,6 +61,14 @@ class _ContactsTabState extends State<ContactsTab> {
     });
   }
 
+  @override
+  void dispose() {
+    for (final controller in _filterControllers.values) {
+      controller.dispose();
+    }
+    super.dispose();
+  }
+
   Future<void> _getCurrentLocation() async {
     try {
       final position = await Geolocator.getCurrentPosition(
@@ -95,6 +116,38 @@ class _ContactsTabState extends State<ContactsTab> {
     }
   }
 
+  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,
@@ -135,6 +188,96 @@ class _ContactsTabState extends State<ContactsTab> {
     return l10n.daysAgo(diff.inDays);
   }
 
+  List<Contact> _filterContactsForSection(
+    List<Contact> contacts,
+    ContactSection section,
+  ) {
+    final query = (_sectionFilters[section] ?? '').trim().toLowerCase();
+    if (query.isEmpty) {
+      return contacts;
+    }
+
+    return contacts.where((contact) {
+      final name = contact.displayName.toLowerCase();
+      final advertisedName = contact.advName.toLowerCase();
+      return name.contains(query) || advertisedName.contains(query);
+    }).toList();
+  }
+
+  bool _contactMatchesFilter(Contact contact, String query) {
+    final normalizedQuery = query.trim().toLowerCase();
+    if (normalizedQuery.isEmpty) {
+      return true;
+    }
+
+    final name = contact.displayName.toLowerCase();
+    final advertisedName = contact.advName.toLowerCase();
+    return name.contains(normalizedQuery) ||
+        advertisedName.contains(normalizedQuery);
+  }
+
+  List<_RenderedSavedGroup> _buildSavedGroupsForSection(
+    ContactsProvider contactsProvider,
+    List<Contact> contacts,
+    ContactSection section,
+  ) {
+    return contactsProvider
+        .savedGroupsForSection(section.name)
+        .map((group) {
+          final matches = contacts
+              .where((contact) => _contactMatchesFilter(contact, group.query))
+              .toList();
+          return _RenderedSavedGroup(group: group, contacts: matches);
+        })
+        .where((group) => group.contacts.isNotEmpty)
+        .toList()
+      ..sort(
+        (a, b) => b.contacts.first.lastSeenTime.compareTo(
+          a.contacts.first.lastSeenTime,
+        ),
+      );
+  }
+
+  Future<void> _toggleSavedGroupForSection(
+    BuildContext context,
+    ContactsProvider contactsProvider,
+    ContactSection section,
+  ) async {
+    final filter = (_sectionFilters[section] ?? '').trim();
+    if (filter.isEmpty) {
+      return;
+    }
+
+    final alreadySaved = contactsProvider.hasSavedGroupForFilter(
+      section.name,
+      filter,
+    );
+
+    if (alreadySaved) {
+      await contactsProvider.removeSavedGroupForFilter(section.name, filter);
+    } else {
+      await contactsProvider.addSavedGroupForFilter(
+        section.name,
+        filter,
+        label: filter,
+      );
+    }
+
+    if (!context.mounted) {
+      return;
+    }
+
+    ScaffoldMessenger.of(context).showSnackBar(
+      SnackBar(
+        content: Text(
+          alreadySaved
+              ? 'Removed saved group "$filter"'
+              : 'Saved group "$filter"',
+        ),
+      ),
+    );
+  }
+
   List<Contact> _sortContacts(List<Contact> contacts, ContactSection section) {
     final sorted = List<Contact>.from(contacts);
     if (section == ContactSection.channels) {
@@ -230,30 +373,69 @@ class _ContactsTabState extends State<ContactsTab> {
       body: Consumer<ContactsProvider>(
         builder: (context, contactsProvider, child) {
           final messagesProvider = context.watch<MessagesProvider>();
-          final chatContacts = _sortContacts(
+          final connectionProvider = context.watch<ConnectionProvider>();
+          final allChatContacts = _sortContacts(
             contactsProvider.chatContacts,
             ContactSection.teamMembers,
           );
-          final repeaters = _sortContacts(
+          final allRepeaters = _sortContacts(
             contactsProvider.repeaters,
             ContactSection.repeaters,
           );
-          final rooms = _sortContacts(
+          final allRooms = _sortContacts(
             contactsProvider.rooms,
             ContactSection.rooms,
           );
-          final channels = _sortContacts(
+          final allChannels = _sortContacts(
             contactsProvider.channels,
             ContactSection.channels,
           );
+          final chatContacts = _filterContactsForSection(
+            allChatContacts,
+            ContactSection.teamMembers,
+          );
+          final savedTeamGroups = _buildSavedGroupsForSection(
+            contactsProvider,
+            allChatContacts,
+            ContactSection.teamMembers,
+          );
+          final repeaters = _filterContactsForSection(
+            allRepeaters,
+            ContactSection.repeaters,
+          );
+          final savedRepeaterGroups = _buildSavedGroupsForSection(
+            contactsProvider,
+            allRepeaters,
+            ContactSection.repeaters,
+          );
+          final rooms = _filterContactsForSection(
+            allRooms,
+            ContactSection.rooms,
+          );
+          final savedRoomGroups = _buildSavedGroupsForSection(
+            contactsProvider,
+            allRooms,
+            ContactSection.rooms,
+          );
+          final filteredChannels = _filterContactsForSection(
+            allChannels,
+            ContactSection.channels,
+          );
+          final savedChannelGroups = _buildSavedGroupsForSection(
+            contactsProvider,
+            allChannels,
+            ContactSection.channels,
+          );
           final pendingAdverts = contactsProvider.pendingAdverts;
 
+          _schedulePendingAdvertResolution(pendingAdverts, connectionProvider);
+
           // Check if there are any displayable contacts
           final hasDisplayableContacts =
-              chatContacts.isNotEmpty ||
-              repeaters.isNotEmpty ||
-              rooms.isNotEmpty ||
-              channels.isNotEmpty ||
+              allChatContacts.isNotEmpty ||
+              allRepeaters.isNotEmpty ||
+              allRooms.isNotEmpty ||
+              allChannels.isNotEmpty ||
               pendingAdverts.isNotEmpty;
 
           if (!hasDisplayableContacts) {
@@ -287,29 +469,8 @@ class _ContactsTabState extends State<ContactsTab> {
             child: ListView(
               padding: const EdgeInsets.all(8),
               children: [
-                // Pending adverts (public key only; quick resolve)
-                if (pendingAdverts.isNotEmpty) ...[
-                  _SectionHeader(
-                    title: l10n.pending,
-                    count: pendingAdverts.length,
-                    icon: Icons.person_add_alt_1,
-                  ),
-                  ...pendingAdverts.map(
-                    (advert) => _PendingAdvertTile(
-                      advert: advert,
-                      subtitle:
-                          '${l10n.publicKey}: ${advert.publicKeyHex}\n${l10n.lastSeen}: ${_formatRelativeTime(context, advert.receivedAt)}',
-                      isResolving: _resolvingAdvertKeys.contains(
-                        advert.publicKeyHex,
-                      ),
-                      onResolve: () => _handleResolveAdvert(advert),
-                    ),
-                  ),
-                  const Divider(height: 32),
-                ],
-
                 // Team Members (Chat contacts)
-                if (chatContacts.isNotEmpty) ...[
+                if (allChatContacts.isNotEmpty) ...[
                   _SectionHeader(
                     title: l10n.teamMembers,
                     count: chatContacts.length,
@@ -319,42 +480,122 @@ class _ContactsTabState extends State<ContactsTab> {
                       ContactSection.teamMembers,
                     ),
                   ),
-                  ..._buildContactSectionItems(chatContacts),
+                  _buildSectionFilterField(
+                    context,
+                    ContactSection.teamMembers,
+                    contactsProvider,
+                  ),
+                  if (chatContacts.isEmpty)
+                    _buildEmptyFilterState(context)
+                  else ...[
+                    ..._buildSavedGroupCards(
+                      savedTeamGroups,
+                      ContactSection.teamMembers,
+                    ),
+                    ..._buildContactSectionItems(
+                      _excludeGroupedContacts(chatContacts, savedTeamGroups),
+                    ),
+                  ],
                   const Divider(height: 32),
                 ],
 
                 // Repeaters
-                if (repeaters.isNotEmpty) ...[
+                if (allRepeaters.isNotEmpty) ...[
                   _SectionHeader(
                     title: l10n.repeaters,
                     count: repeaters.length,
                     icon: Icons.router,
                     trailing: _buildSortMenu(context, ContactSection.repeaters),
                   ),
-                  ..._buildContactSectionItems(repeaters),
+                  _buildSectionFilterField(
+                    context,
+                    ContactSection.repeaters,
+                    contactsProvider,
+                  ),
+                  if (repeaters.isEmpty)
+                    _buildEmptyFilterState(context)
+                  else ...[
+                    ..._buildSavedGroupCards(
+                      savedRepeaterGroups,
+                      ContactSection.repeaters,
+                    ),
+                    ..._buildContactSectionItems(
+                      _excludeGroupedContacts(repeaters, savedRepeaterGroups),
+                    ),
+                  ],
                   const Divider(height: 32),
                 ],
 
                 // Rooms
-                if (rooms.isNotEmpty) ...[
+                if (allRooms.isNotEmpty) ...[
                   _SectionHeader(
                     title: l10n.rooms,
                     count: rooms.length,
                     icon: Icons.tag,
                     trailing: _buildSortMenu(context, ContactSection.rooms),
                   ),
-                  ..._buildContactSectionItems(rooms),
+                  _buildSectionFilterField(
+                    context,
+                    ContactSection.rooms,
+                    contactsProvider,
+                  ),
+                  if (rooms.isEmpty)
+                    _buildEmptyFilterState(context)
+                  else ...[
+                    ..._buildSavedGroupCards(
+                      savedRoomGroups,
+                      ContactSection.rooms,
+                    ),
+                    ..._buildContactSectionItems(
+                      _excludeGroupedContacts(rooms, savedRoomGroups),
+                    ),
+                  ],
+                  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),
+                    ),
+                  ),
                   const Divider(height: 32),
                 ],
 
                 // Channels (visible in both simple and advanced mode)
                 _SectionHeader(
                   title: l10n.channels,
-                  count: channels.length,
+                  count: filteredChannels.length,
                   icon: Icons.broadcast_on_personal,
                 ),
-                if (channels.isNotEmpty) ...[
-                  ...channels.map(
+                _buildSectionFilterField(
+                  context,
+                  ContactSection.channels,
+                  contactsProvider,
+                ),
+                if (allChannels.isNotEmpty && filteredChannels.isEmpty)
+                  _buildEmptyFilterState(context),
+                ..._buildSavedGroupCards(
+                  savedChannelGroups,
+                  ContactSection.channels,
+                ),
+                if (filteredChannels.isNotEmpty) ...[
+                  ..._excludeGroupedContacts(
+                    filteredChannels,
+                    savedChannelGroups,
+                  ).map(
                     (channel) => _ChannelActivityCard(
                       channel: channel,
                       messagesProvider: messagesProvider,
@@ -418,6 +659,209 @@ class _ContactsTabState extends State<ContactsTab> {
     }).toList();
   }
 
+  List<Contact> _excludeGroupedContacts(
+    List<Contact> contacts,
+    List<_RenderedSavedGroup> savedGroups,
+  ) {
+    final groupedKeys = savedGroups
+        .expand(
+          (group) => group.contacts.map((contact) => contact.publicKeyHex),
+        )
+        .toSet();
+    return contacts
+        .where((contact) => !groupedKeys.contains(contact.publicKeyHex))
+        .toList();
+  }
+
+  List<Widget> _buildSavedGroupCards(
+    List<_RenderedSavedGroup> groups,
+    ContactSection section,
+  ) {
+    return groups
+        .map(
+          (group) => _InferredContactGroupCard(
+            label: group.group.label,
+            contacts: group.contacts,
+            currentPosition: _currentPosition,
+            calculateDistance: _calculateDistanceInMeters,
+            formatDistance: _formatDistance,
+            onNavigateToMap: widget.onNavigateToMap,
+            onNavigateToMessages: widget.onNavigateToMessages,
+            onDelete: () => context
+                .read<ContactsProvider>()
+                .removeSavedGroupById(group.group.id),
+            kindLabel: 'Saved filter',
+          ),
+        )
+        .toList();
+  }
+
+  Widget _buildSectionFilterField(
+    BuildContext context,
+    ContactSection section,
+    ContactsProvider contactsProvider,
+  ) {
+    final theme = Theme.of(context);
+    final colorScheme = theme.colorScheme;
+    final controller = _filterControllers[section]!;
+    final hasFilter = (_sectionFilters[section] ?? '').isNotEmpty;
+    final isSavedFilter = hasFilter
+        ? contactsProvider.hasSavedGroupForFilter(
+            section.name,
+            _sectionFilters[section] ?? '',
+          )
+        : false;
+
+    return Padding(
+      padding: const EdgeInsets.only(bottom: 8),
+      child: Material(
+        color: Colors.transparent,
+        child: Ink(
+          decoration: BoxDecoration(
+            color: colorScheme.surface,
+            borderRadius: BorderRadius.circular(16),
+            border: Border.all(
+              color: hasFilter
+                  ? colorScheme.primary.withValues(alpha: 0.38)
+                  : colorScheme.outline.withValues(alpha: 0.32),
+              width: 1.2,
+            ),
+            boxShadow: [
+              BoxShadow(
+                color: colorScheme.shadow.withValues(alpha: 0.025),
+                blurRadius: 8,
+                offset: const Offset(0, 2),
+              ),
+            ],
+          ),
+          child: ClipRRect(
+            borderRadius: BorderRadius.circular(16),
+            child: SizedBox(
+              height: 42,
+              child: Row(
+                children: [
+                  Padding(
+                    padding: const EdgeInsets.only(left: 12, right: 8),
+                    child: Icon(
+                      Icons.search_rounded,
+                      size: 17,
+                      color: hasFilter
+                          ? colorScheme.primary
+                          : colorScheme.onSurfaceVariant,
+                    ),
+                  ),
+                  Expanded(
+                    child: TextFormField(
+                      controller: controller,
+                      onChanged: (value) {
+                        setState(() {
+                          _sectionFilters[section] = value;
+                        });
+                      },
+                      cursorColor: colorScheme.primary,
+                      style: theme.textTheme.bodyMedium?.copyWith(
+                        fontWeight: FontWeight.w600,
+                        height: 1.1,
+                      ),
+                      decoration: InputDecoration(
+                        hintText: 'Search this section',
+                        hintStyle: theme.textTheme.bodyMedium?.copyWith(
+                          color: colorScheme.onSurfaceVariant.withValues(
+                            alpha: 0.85,
+                          ),
+                        ),
+                        filled: true,
+                        fillColor: Colors.transparent,
+                        border: InputBorder.none,
+                        enabledBorder: InputBorder.none,
+                        focusedBorder: InputBorder.none,
+                        disabledBorder: InputBorder.none,
+                        isDense: true,
+                        contentPadding: const EdgeInsets.symmetric(
+                          vertical: 10,
+                        ),
+                      ),
+                    ),
+                  ),
+                  if (hasFilter) ...[
+                    Padding(
+                      padding: const EdgeInsets.only(right: 4),
+                      child: Material(
+                        color:
+                            (isSavedFilter
+                                    ? colorScheme.error
+                                    : colorScheme.primary)
+                                .withValues(alpha: 0.10),
+                        shape: const CircleBorder(),
+                        child: InkWell(
+                          customBorder: const CircleBorder(),
+                          onTap: () => _toggleSavedGroupForSection(
+                            context,
+                            contactsProvider,
+                            section,
+                          ),
+                          child: Padding(
+                            padding: const EdgeInsets.all(6),
+                            child: Icon(
+                              isSavedFilter
+                                  ? Icons.delete_outline_rounded
+                                  : Icons.bookmark_add_outlined,
+                              size: 16,
+                              color: isSavedFilter
+                                  ? colorScheme.error
+                                  : colorScheme.primary,
+                            ),
+                          ),
+                        ),
+                      ),
+                    ),
+                    Padding(
+                      padding: const EdgeInsets.only(right: 6),
+                      child: Material(
+                        color: colorScheme.primary.withValues(alpha: 0.10),
+                        shape: const CircleBorder(),
+                        child: InkWell(
+                          customBorder: const CircleBorder(),
+                          onTap: () {
+                            controller.clear();
+                            setState(() {
+                              _sectionFilters[section] = '';
+                            });
+                          },
+                          child: Padding(
+                            padding: const EdgeInsets.all(6),
+                            child: Icon(
+                              Icons.close_rounded,
+                              size: 14,
+                              color: colorScheme.primary,
+                            ),
+                          ),
+                        ),
+                      ),
+                    ),
+                  ] else
+                    const SizedBox(width: 12),
+                ],
+              ),
+            ),
+          ),
+        ),
+      ),
+    );
+  }
+
+  Widget _buildEmptyFilterState(BuildContext context) {
+    return Padding(
+      padding: const EdgeInsets.only(bottom: 8),
+      child: Text(
+        'No matches for this filter.',
+        style: Theme.of(context).textTheme.bodySmall?.copyWith(
+          color: Theme.of(context).colorScheme.onSurfaceVariant,
+        ),
+      ),
+    );
+  }
+
   Widget _buildSortMenu(BuildContext context, ContactSection section) {
     final l10n = AppLocalizations.of(context)!;
     final selectedMode = _sortModes[section] ?? ContactSortMode.lastSeen;
@@ -513,7 +957,7 @@ class _PendingAdvertTile extends StatelessWidget {
               )
             : IconButton(
                 icon: const Icon(Icons.person_add_alt_1),
-                tooltip: 'Quick add',
+                tooltip: 'Resolve contact',
                 onPressed: onResolve,
               ),
       ),
@@ -521,6 +965,13 @@ class _PendingAdvertTile extends StatelessWidget {
   }
 }
 
+class _RenderedSavedGroup {
+  final SavedContactGroup group;
+  final List<Contact> contacts;
+
+  const _RenderedSavedGroup({required this.group, required this.contacts});
+}
+
 class _SectionHeader extends StatelessWidget {
   final String title;
   final int count;
@@ -570,20 +1021,24 @@ class _SectionHeader extends StatelessWidget {
 class _InferredContactGroupCard extends StatelessWidget {
   final String label;
   final List<Contact> contacts;
+  final String? kindLabel;
   final Position? currentPosition;
   final double Function(double, double, double, double) calculateDistance;
   final String Function(double) formatDistance;
   final VoidCallback? onNavigateToMap;
   final VoidCallback? onNavigateToMessages;
+  final VoidCallback? onDelete;
 
   const _InferredContactGroupCard({
     required this.label,
     required this.contacts,
+    this.kindLabel,
     required this.currentPosition,
     required this.calculateDistance,
     required this.formatDistance,
     required this.onNavigateToMap,
     required this.onNavigateToMessages,
+    this.onDelete,
   });
 
   @override
@@ -613,11 +1068,24 @@ class _InferredContactGroupCard extends StatelessWidget {
           title: Row(
             children: [
               Expanded(
-                child: Text(
-                  label,
-                  style: Theme.of(
-                    context,
-                  ).textTheme.titleSmall?.copyWith(fontWeight: FontWeight.w800),
+                child: Column(
+                  crossAxisAlignment: CrossAxisAlignment.start,
+                  children: [
+                    Text(
+                      label,
+                      style: Theme.of(context).textTheme.titleSmall?.copyWith(
+                        fontWeight: FontWeight.w800,
+                      ),
+                    ),
+                    if (kindLabel case final value?)
+                      Text(
+                        value,
+                        style: Theme.of(context).textTheme.labelSmall?.copyWith(
+                          color: colorScheme.onSurfaceVariant,
+                          fontWeight: FontWeight.w600,
+                        ),
+                      ),
+                  ],
                 ),
               ),
               const SizedBox(width: 8),
@@ -632,12 +1100,25 @@ class _InferredContactGroupCard extends StatelessWidget {
                   style: Theme.of(context).textTheme.labelSmall,
                 ),
               ),
+              if (onDelete != null) ...[
+                const SizedBox(width: 4),
+                IconButton(
+                  tooltip: 'Delete group',
+                  onPressed: onDelete,
+                  icon: Icon(
+                    Icons.delete_outline_rounded,
+                    size: 18,
+                    color: colorScheme.error,
+                  ),
+                ),
+              ],
             ],
           ),
           children: [
             ...contacts.map(
               (contact) => ContactTile(
                 contact: contact,
+                groupLabel: label,
                 currentPosition: currentPosition,
                 calculateDistance: calculateDistance,
                 formatDistance: formatDistance,

lib/screens/home_screen.dart

@@ -18,6 +18,7 @@ import 'repeaters_map_screen.dart';
 import 'settings_screen.dart';
 import 'device_config_screen.dart';
 import 'packet_log_screen.dart';
+import 'live_traffic_screen.dart';
 import 'spectrum_scan_screen.dart';
 import '../utils/toast_logger.dart';
 import '../l10n/app_localizations.dart';
@@ -218,6 +219,10 @@ class _HomeScreenState extends State<HomeScreen>
     );
   }
 
+  void _openLiveTraffic(ConnectionProvider provider) {
+    openLiveTrafficScreen(context, provider);
+  }
+
   @override
   void didChangeAppLifecycleState(AppLifecycleState state) {
     _lifecycleState = state;
@@ -647,6 +652,41 @@ class _HomeScreenState extends State<HomeScreen>
                       );
                     }
 
+                    items.add(
+                      PopupMenuItem(
+                        child: const Row(
+                          children: [
+                            Icon(Icons.radar_outlined),
+                            SizedBox(width: 8),
+                            Text('Live Traffic'),
+                          ],
+                        ),
+                        onTap: () {
+                          final navigator = Navigator.of(context);
+                          final provider = context.read<ConnectionProvider>();
+                          Future.delayed(Duration.zero, () {
+                            if (!mounted) return;
+                            navigator.push(
+                              MaterialPageRoute(
+                                builder: (_) => LiveTrafficScreen.fromProvider(
+                                  provider,
+                                  openPacketLogs: () {
+                                    navigator.push(
+                                      MaterialPageRoute(
+                                        builder: (_) => PacketLogScreen(
+                                          bleService: provider.bleService,
+                                        ),
+                                      ),
+                                    );
+                                  },
+                                ),
+                              ),
+                            );
+                          });
+                        },
+                      ),
+                    );
+
                     items.add(
                       PopupMenuItem(
                         child: const Row(
@@ -1056,6 +1096,7 @@ class _HomeScreenState extends State<HomeScreen>
                 SizedBox(width: isTight ? 8 : 12),
                 if (_showRxTxIndicators)
                   GestureDetector(
+                    onTap: () => _openLiveTraffic(provider),
                     onLongPress: () {
                       Navigator.push(
                         context,

lib/screens/messages_tab.dart

@@ -71,7 +71,7 @@ class _MessagesTabState extends State<MessagesTab> {
   final VoiceRecorderService _voiceRecorder = VoiceRecorderService();
   bool _isRecording = false;
   bool _isSendingVoice = false;
-  static const int _maxVoicePackets = 10;
+  static const Duration _maxVoiceRecordingDuration = Duration(seconds: 30);
   static const double _silenceRmsThreshold = 500.0;
   static const double _silencePeakThreshold = 1400.0;
   static const int _maxInteriorSilentChunks = 2;
@@ -88,13 +88,13 @@ class _MessagesTabState extends State<MessagesTab> {
     _textController.addListener(_updateCharacterCount);
     // Load saved message destination
     _loadSavedDestination();
-    _loadVoiceBitrate();
+    _loadVoiceSettings();
     WidgetsBinding.instance.addPostFrameCallback((_) {
       _checkForNavigationRequest();
     });
   }
 
-  Future<void> _loadVoiceBitrate() async {
+  Future<void> _loadVoiceSettings() async {
     final bitrate = await VoiceBitratePreferences.getBitrate();
     if (!mounted) return;
     setState(() {
@@ -817,7 +817,7 @@ class _MessagesTabState extends State<MessagesTab> {
   Future<void> _startVoiceRecording() async {
     if (_isSendingVoice || _isRecording) return;
     debugPrint('🎙️ [Voice] _startVoiceRecording called');
-    // Read fresh bitrate preference so settings changes apply immediately.
+    // Read fresh voice preferences so settings changes apply immediately.
     final selectedBitrate = await VoiceBitratePreferences.getBitrate();
     if (mounted) {
       setState(() {
@@ -856,11 +856,12 @@ class _MessagesTabState extends State<MessagesTab> {
       _selectedVoiceBitrate,
     );
     final packetDuration = Duration(
-      milliseconds: codec2ModeFor(_activeVoiceMode!).packetDurationMs,
+      milliseconds: _activeVoiceMode!.packetDurationMs,
     );
+    final maxVoicePackets = _maxVoicePacketsForMode(_activeVoiceMode!);
 
     debugPrint(
-      '🎙️ [Voice] session=$_currentVoiceSessionId mode=$_activeVoiceMode chunkDuration=${packetDuration.inMilliseconds}ms',
+      '🎙️ [Voice] session=$_currentVoiceSessionId mode=$_activeVoiceMode chunkDuration=${packetDuration.inMilliseconds}ms maxPackets=$maxVoicePackets',
     );
 
     _recordedChunks.clear();
@@ -869,9 +870,13 @@ class _MessagesTabState extends State<MessagesTab> {
     try {
       final stream = _voiceRecorder.startCapture(
         chunkDuration: packetDuration,
+        sampleRateHz: _activeVoiceMode!.sampleRateHz,
         enableBandPassFilter: appProvider.isVoiceBandPassFilterEnabled,
         enableCompressor: appProvider.isVoiceCompressorEnabled,
         enableLimiter: appProvider.isVoiceLimiterEnabled,
+        enableAutoGain: appProvider.isVoiceAutoGainEnabled,
+        enableEchoCancellation: appProvider.isVoiceEchoCancellationEnabled,
+        enableNoiseSuppression: appProvider.isVoiceNoiseSuppressionEnabled,
       );
       debugPrint('🎙️ [Voice] capture started, listening for chunks...');
       _voiceStreamSub = stream.listen(
@@ -882,7 +887,7 @@ class _MessagesTabState extends State<MessagesTab> {
             '🎙️ [Voice] chunk #${_recordedChunks.length} received: ${pcmChunk.length} samples',
           );
           setState(() {});
-          if (_recordedChunks.length >= _maxVoicePackets) {
+          if (_recordedChunks.length >= maxVoicePackets) {
             debugPrint('🎙️ [Voice] max packets reached, stopping');
             _stopAndSendVoice();
           }
@@ -899,6 +904,12 @@ class _MessagesTabState extends State<MessagesTab> {
     }
   }
 
+  int _maxVoicePacketsForMode(VoicePacketMode mode) {
+    final packets =
+        _maxVoiceRecordingDuration.inMilliseconds ~/ mode.packetDurationMs;
+    return packets < 1 ? 1 : packets;
+  }
+
   Future<void> _stopAndSendVoice() async {
     if (!_isRecording) return;
     final trimSilenceEnabled = context
@@ -913,9 +924,14 @@ class _MessagesTabState extends State<MessagesTab> {
     await _voiceRecorder.stopCapture();
 
     final rawChunks = List<Int16List>.from(_recordedChunks);
-    final chunks = trimSilenceEnabled ? _trimSilence(rawChunks) : rawChunks;
+    final trimmedChunks = trimSilenceEnabled
+        ? _trimSilence(rawChunks)
+        : rawChunks;
     final sessionId = _currentVoiceSessionId;
     final mode = _activeVoiceMode;
+    final chunks = mode == null
+        ? trimmedChunks
+        : _prepareChunksForSending(trimmedChunks, mode);
     _recordedChunks.clear();
 
     debugPrint(
@@ -1104,6 +1120,13 @@ class _MessagesTabState extends State<MessagesTab> {
     messagesProvider.markMessageSent(msgId, 0, 0);
   }
 
+  List<Int16List> _prepareChunksForSending(
+    List<Int16List> chunks,
+    VoicePacketMode mode,
+  ) {
+    return chunks;
+  }
+
   List<Int16List> _trimSilence(List<Int16List> chunks) {
     if (chunks.isEmpty) return chunks;
 
@@ -1133,16 +1156,28 @@ class _MessagesTabState extends State<MessagesTab> {
   bool _isSilentChunk(Int16List chunk) {
     if (chunk.isEmpty) return true;
 
+    final rms = _chunkRms(chunk);
+    final peak = _chunkPeak(chunk);
+    return rms < _silenceRmsThreshold && peak < _silencePeakThreshold;
+  }
+
+  double _chunkRms(Int16List chunk) {
     var sumSquares = 0.0;
+    for (final sample in chunk) {
+      sumSquares += sample * sample;
+    }
+    return math.sqrt(sumSquares / chunk.length);
+  }
+
+  int _chunkPeak(Int16List chunk) {
     var peak = 0;
     for (final sample in chunk) {
       final absSample = sample.abs();
-      if (absSample > peak) peak = absSample;
-      sumSquares += sample * sample;
+      if (absSample > peak) {
+        peak = absSample;
+      }
     }
-
-    final rms = math.sqrt(sumSquares / chunk.length);
-    return rms < _silenceRmsThreshold && peak < _silencePeakThreshold;
+    return peak;
   }
 
   bool _isPublicChannelSelected() {

lib/screens/settings_screen.dart

@@ -18,7 +18,6 @@ import '../services/location_tracking_service.dart';
 import '../services/locale_preferences.dart';
 import '../services/mesh_map_nodes_service.dart';
 import '../services/update_checker_service.dart';
-import '../services/voice_codec_service.dart';
 import '../services/voice_bitrate_preferences.dart';
 import '../services/image_preferences.dart';
 import '../services/route_hash_preferences.dart';
@@ -88,7 +87,7 @@ class _SettingsScreenState extends State<SettingsScreen> {
     _loadPackageInfo();
     _initializeLocationService();
     _loadRxTxPreference();
-    _loadVoiceBitratePreference();
+    _loadVoicePreferences();
     _loadRouteHashSizePreference();
     _loadImagePreferences();
     _loadFastLocationSettings();
@@ -178,7 +177,7 @@ class _SettingsScreenState extends State<SettingsScreen> {
     await prefs.setBool('show_rx_tx_indicators', value);
   }
 
-  Future<void> _loadVoiceBitratePreference() async {
+  Future<void> _loadVoicePreferences() async {
     final value = await VoiceBitratePreferences.getBitrate();
     if (!mounted) return;
     setState(() {
@@ -1164,6 +1163,11 @@ class _SettingsScreenState extends State<SettingsScreen> {
                   bandPassEnabled: appProvider.isVoiceBandPassFilterEnabled,
                   compressorEnabled: appProvider.isVoiceCompressorEnabled,
                   limiterEnabled: appProvider.isVoiceLimiterEnabled,
+                  autoGainEnabled: appProvider.isVoiceAutoGainEnabled,
+                  echoCancellationEnabled:
+                      appProvider.isVoiceEchoCancellationEnabled,
+                  noiseSuppressionEnabled:
+                      appProvider.isVoiceNoiseSuppressionEnabled,
                   silenceTrimEnabled: appProvider.isVoiceSilenceTrimmingEnabled,
                 ),
           ),
@@ -1210,6 +1214,43 @@ class _SettingsScreenState extends State<SettingsScreen> {
                 },
               ),
             ),
+            Consumer<AppProvider>(
+              builder: (context, appProvider, child) => SwitchListTile(
+                secondary: const Icon(Icons.auto_fix_high),
+                title: const Text('Mic auto gain'),
+                subtitle: const Text('Lets the recorder adjust input level'),
+                value: appProvider.isVoiceAutoGainEnabled,
+                onChanged: (value) async {
+                  await appProvider.toggleVoiceAutoGainEnabled(value);
+                },
+              ),
+            ),
+            Consumer<AppProvider>(
+              builder: (context, appProvider, child) => SwitchListTile(
+                secondary: const Icon(Icons.hearing_disabled),
+                title: const Text('Echo cancellation'),
+                subtitle: const Text(
+                  'Uses recorder echo cancellation if available',
+                ),
+                value: appProvider.isVoiceEchoCancellationEnabled,
+                onChanged: (value) async {
+                  await appProvider.toggleVoiceEchoCancellationEnabled(value);
+                },
+              ),
+            ),
+            Consumer<AppProvider>(
+              builder: (context, appProvider, child) => SwitchListTile(
+                secondary: const Icon(Icons.noise_control_off),
+                title: const Text('Noise suppression'),
+                subtitle: const Text(
+                  'Uses recorder noise suppression if available',
+                ),
+                value: appProvider.isVoiceNoiseSuppressionEnabled,
+                onChanged: (value) async {
+                  await appProvider.toggleVoiceNoiseSuppressionEnabled(value);
+                },
+              ),
+            ),
             Consumer<AppProvider>(
               builder: (context, appProvider, child) => SwitchListTile(
                 secondary: const Icon(Icons.content_cut),
@@ -1729,6 +1770,9 @@ class _SettingsScreenState extends State<SettingsScreen> {
     required bool bandPassEnabled,
     required bool compressorEnabled,
     required bool limiterEnabled,
+    required bool autoGainEnabled,
+    required bool echoCancellationEnabled,
+    required bool noiseSuppressionEnabled,
     required bool silenceTrimEnabled,
   }) {
     final supported = VoiceBitratePreferences.supportedBitrates;
@@ -1741,6 +1785,9 @@ class _SettingsScreenState extends State<SettingsScreen> {
         (bandPassEnabled ? 1 : 0) +
         (compressorEnabled ? 1 : 0) +
         (limiterEnabled ? 1 : 0) +
+        (autoGainEnabled ? 1 : 0) +
+        (echoCancellationEnabled ? 1 : 0) +
+        (noiseSuppressionEnabled ? 1 : 0) +
         (silenceTrimEnabled ? 1 : 0);
     final radioBw = connectionProvider.deviceInfo.radioBw;
     final radioSf = connectionProvider.deviceInfo.radioSf;
@@ -1748,7 +1795,7 @@ class _SettingsScreenState extends State<SettingsScreen> {
     final bwHz = _resolveBandwidthHz(radioBw);
     final voiceMode = VoiceBitratePreferences.toVoiceMode(bitrate);
     const voicePreviewMs = 10000; // 10-second reference clip
-    final packetDurationMs = codec2ModeFor(voiceMode).packetDurationMs;
+    final packetDurationMs = voiceMode.packetDurationMs;
     final voicePacketCount =
         (voicePreviewMs + packetDurationMs - 1) ~/ packetDurationMs;
     final voiceDirect = estimateVoiceTransmitDuration(
@@ -1783,7 +1830,7 @@ class _SettingsScreenState extends State<SettingsScreen> {
             ),
             const SizedBox(height: 8),
             Text(
-              'Bitrate: $bitrate bps',
+              'Codec: ${voiceMode.label} · $bitrate bps',
               style: Theme.of(context).textTheme.bodySmall,
             ),
             const SizedBox(height: 4),
@@ -1830,6 +1877,31 @@ class _SettingsScreenState extends State<SettingsScreen> {
               ],
             ),
             const SizedBox(height: 8),
+            Row(
+              children: [
+                Expanded(
+                  child: _voiceStatChip(
+                    label: 'Auto gain',
+                    enabled: autoGainEnabled,
+                  ),
+                ),
+                const SizedBox(width: 8),
+                Expanded(
+                  child: _voiceStatChip(
+                    label: 'Echo cancel',
+                    enabled: echoCancellationEnabled,
+                  ),
+                ),
+                const SizedBox(width: 8),
+                Expanded(
+                  child: _voiceStatChip(
+                    label: 'Noise suppress',
+                    enabled: noiseSuppressionEnabled,
+                  ),
+                ),
+              ],
+            ),
+            const SizedBox(height: 8),
             Row(
               children: [
                 Expanded(
@@ -1842,7 +1914,7 @@ class _SettingsScreenState extends State<SettingsScreen> {
             ),
             const SizedBox(height: 8),
             Text(
-              'Processing enabled: $enabledCount/4',
+              'Processing enabled: $enabledCount/7',
               style: Theme.of(context).textTheme.bodySmall,
             ),
           ],

lib/services/contact_route_resolver.dart

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

lib/services/contact_storage_service.dart

@@ -2,12 +2,14 @@ import 'dart:convert';
 import 'package:flutter/foundation.dart';
 import 'package:shared_preferences/shared_preferences.dart';
 import '../models/contact.dart';
+import '../models/contact_group.dart';
 import '../utils/key_comparison.dart';
 import 'package:latlong2/latlong.dart';
 
 /// Service for persisting contacts to local storage
 class ContactStorageService {
   static const String _contactsKey = 'stored_contacts';
+  static const String _contactGroupsKey = 'stored_contact_groups';
   static const int _maxStoredContacts = 500; // Store up to 500 contacts
 
   /// Save contacts to persistent storage
@@ -90,6 +92,40 @@ class ContactStorageService {
     }
   }
 
+  Future<void> saveContactGroups(List<SavedContactGroup> groups) async {
+    try {
+      final prefs = await SharedPreferences.getInstance();
+      final jsonString = jsonEncode(
+        groups.map((group) => _contactGroupToJson(group)).toList(),
+      );
+      await prefs.setString(_contactGroupsKey, jsonString);
+      debugPrint(
+        '✅ [ContactStorage] Saved ${groups.length} contact groups to storage',
+      );
+    } catch (e) {
+      debugPrint('❌ [ContactStorage] Error saving contact groups: $e');
+    }
+  }
+
+  Future<List<SavedContactGroup>> loadContactGroups() async {
+    try {
+      final prefs = await SharedPreferences.getInstance();
+      final jsonString = prefs.getString(_contactGroupsKey);
+      if (jsonString == null || jsonString.isEmpty) {
+        return [];
+      }
+
+      final jsonList = jsonDecode(jsonString) as List<dynamic>;
+      return jsonList
+          .map((json) => _contactGroupFromJson(json as Map<String, dynamic>))
+          .whereType<SavedContactGroup>()
+          .toList();
+    } catch (e) {
+      debugPrint('❌ [ContactStorage] Error loading contact groups: $e');
+      return [];
+    }
+  }
+
   /// Get storage statistics
   Future<Map<String, dynamic>> getStorageStats() async {
     try {
@@ -203,4 +239,31 @@ class ContactStorageService {
       return null;
     }
   }
+
+  Map<String, dynamic> _contactGroupToJson(SavedContactGroup group) {
+    return {
+      'id': group.id,
+      'sectionKey': group.sectionKey,
+      'label': group.label,
+      'query': group.query,
+      'createdAtMillis': group.createdAt.millisecondsSinceEpoch,
+    };
+  }
+
+  SavedContactGroup? _contactGroupFromJson(Map<String, dynamic> json) {
+    try {
+      return SavedContactGroup(
+        id: json['id'] as String,
+        sectionKey: json['sectionKey'] as String,
+        label: json['label'] as String,
+        query: json['query'] as String,
+        createdAt: DateTime.fromMillisecondsSinceEpoch(
+          json['createdAtMillis'] as int,
+        ),
+      );
+    } catch (e) {
+      debugPrint('❌ [ContactStorage] Error parsing contact group: $e');
+      return null;
+    }
+  }
 }

lib/services/live_traffic_summary.dart

@@ -0,0 +1,246 @@
+import '../models/ble_packet_log.dart';
+import '../utils/log_rx_route_decoder.dart';
+
+enum LiveTrafficBusyness { quiet, active, busy }
+
+class LiveTrafficEntry {
+  final BlePacketLog log;
+  final DecodedLogRxRoute? route;
+
+  const LiveTrafficEntry({required this.log, required this.route});
+
+  bool get isMultiHop => (route?.hopCount ?? 0) > 1;
+
+  int? get hopCount => route?.hopCount;
+
+  String get payloadLabel {
+    final decodedRoute = route;
+    if (decodedRoute == null) {
+      return log.responseCode != null ? log.opcodeName : 'Unknown';
+    }
+    return payloadTypeLabel(decodedRoute.payloadType);
+  }
+
+  String? get payloadMeaning {
+    final decodedRoute = route;
+    if (decodedRoute == null) return null;
+    return payloadTypeMeaning(decodedRoute.payloadType);
+  }
+
+  String get routePreview {
+    final decodedRoute = route;
+    if (decodedRoute == null || decodedRoute.hopHashes.isEmpty) {
+      return 'Direct packet';
+    }
+    return decodedRoute.hopHashes
+        .map((hashHex) => '0x${hashHex.toUpperCase()}')
+        .join(' -> ');
+  }
+
+  static String payloadTypeLabel(int payloadType) {
+    switch (payloadType) {
+      case 0x00:
+        return 'Request';
+      case 0x01:
+        return 'Response';
+      case 0x02:
+        return 'Text message';
+      case 0x03:
+        return 'Ack';
+      case 0x04:
+        return 'Advertisement';
+      case 0x05:
+        return 'Group text';
+      case 0x06:
+        return 'Group datagram';
+      case 0x07:
+        return 'Anonymous request';
+      case 0x08:
+        return 'Returned path';
+      case 0x09:
+        return 'Trace path';
+      case 0x0A:
+        return 'Multipart packet';
+      case 0x0B:
+        return 'Control packet';
+      default:
+        return '0x${payloadType.toRadixString(16).padLeft(2, '0')}';
+    }
+  }
+
+  static String payloadTypeMeaning(int payloadType) {
+    switch (payloadType) {
+      case 0x00:
+        return 'Request (destination/source hashes + MAC)';
+      case 0x01:
+        return 'Response to Request or Anonymous request';
+      case 0x02:
+        return 'Plain text message';
+      case 0x03:
+        return 'Simple acknowledgement';
+      case 0x04:
+        return 'Node advertisement';
+      case 0x05:
+        return 'Unverified group text message';
+      case 0x06:
+        return 'Unverified group datagram';
+      case 0x07:
+        return 'Generic anonymous request';
+      case 0x08:
+        return 'Returned path payload';
+      case 0x09:
+        return 'Trace path collecting hop SNR';
+      case 0x0A:
+        return 'One packet from a multipart set';
+      case 0x0B:
+        return 'Control or discovery packet';
+      default:
+        return 'protocol payload';
+    }
+  }
+}
+
+class LiveTrafficSnapshot {
+  final DateTime windowStart;
+  final Duration windowDuration;
+  final int packetsPerMinute;
+  final int rxCount;
+  final int txCount;
+  final int totalCount;
+  final double? avgSnrDb;
+  final double? latestSnrDb;
+  final double? avgRssiDbm;
+  final int? latestRssiDbm;
+  final int multiHopCount;
+  final double? avgHopCount;
+  final List<LiveTrafficEntry> visibleEntries;
+  final LiveTrafficBusyness busyness;
+
+  const LiveTrafficSnapshot({
+    required this.windowStart,
+    required this.windowDuration,
+    required this.packetsPerMinute,
+    required this.rxCount,
+    required this.txCount,
+    required this.totalCount,
+    required this.avgSnrDb,
+    required this.latestSnrDb,
+    required this.avgRssiDbm,
+    required this.latestRssiDbm,
+    required this.multiHopCount,
+    required this.avgHopCount,
+    required this.visibleEntries,
+    required this.busyness,
+  });
+}
+
+class LiveTrafficSummary {
+  static const Duration rollingWindow = Duration(seconds: 60);
+  static const int maxVisibleEntries = 120;
+  static const int logRxDataResponseCode = 0x88;
+
+  const LiveTrafficSummary._();
+
+  static LiveTrafficSnapshot fromLogs(
+    Iterable<BlePacketLog> logs, {
+    required DateTime now,
+    DateTime? clearedAt,
+    int? preferredHashSize,
+    Duration window = rollingWindow,
+    String? packetTypeFilter,
+  }) {
+    final windowStart = now.subtract(window);
+    final effectiveStart = clearedAt != null && clearedAt.isAfter(windowStart)
+        ? clearedAt
+        : windowStart;
+
+    final recentLogs = logs
+        .where(
+          (log) =>
+              log.direction == PacketDirection.rx &&
+              log.responseCode == logRxDataResponseCode &&
+              !log.timestamp.isBefore(effectiveStart),
+        )
+        .toList()
+      ..sort((a, b) => a.timestamp.compareTo(b.timestamp));
+
+    final entries = <LiveTrafficEntry>[];
+    for (final log in recentLogs) {
+      final route = LogRxRouteDecoder.decode(
+        log.rawData,
+        preferredHashSize: preferredHashSize,
+      );
+      entries.add(LiveTrafficEntry(log: log, route: route));
+    }
+
+    final filteredEntries = packetTypeFilter == null
+        ? entries
+        : entries
+              .where((entry) => entry.payloadLabel == packetTypeFilter)
+              .toList();
+
+    var rxCount = 0;
+    var snrCount = 0;
+    var snrSum = 0.0;
+    var rssiCount = 0;
+    var rssiSum = 0.0;
+    double? latestSnrDb;
+    int? latestRssiDbm;
+    var multiHopCount = 0;
+    var hopCountTotal = 0;
+    var hopCountSamples = 0;
+
+    for (final entry in filteredEntries) {
+      rxCount += 1;
+
+      final rxInfo = entry.log.logRxDataInfo;
+      if (rxInfo?.snrDb != null) {
+        snrCount += 1;
+        snrSum += rxInfo!.snrDb!;
+        latestSnrDb = rxInfo.snrDb!;
+      }
+      if (rxInfo?.rssiDbm != null) {
+        rssiCount += 1;
+        rssiSum += rxInfo!.rssiDbm!.toDouble();
+        latestRssiDbm = rxInfo.rssiDbm!;
+      }
+
+      final route = entry.route;
+      if (route != null && route.hopCount > 0) {
+        hopCountSamples += 1;
+        hopCountTotal += route.hopCount;
+        if (route.hopCount > 1) {
+          multiHopCount += 1;
+        }
+      }
+    }
+
+    final visibleEntries = filteredEntries.reversed.take(maxVisibleEntries).toList();
+    const txCount = 0;
+    final totalCount = rxCount;
+    final packetsPerMinute = totalCount;
+
+    return LiveTrafficSnapshot(
+      windowStart: effectiveStart,
+      windowDuration: window,
+      packetsPerMinute: packetsPerMinute,
+      rxCount: rxCount,
+      txCount: txCount,
+      totalCount: totalCount,
+      avgSnrDb: snrCount == 0 ? null : snrSum / snrCount,
+      latestSnrDb: latestSnrDb,
+      avgRssiDbm: rssiCount == 0 ? null : rssiSum / rssiCount,
+      latestRssiDbm: latestRssiDbm,
+      multiHopCount: multiHopCount,
+      avgHopCount: hopCountSamples == 0 ? null : hopCountTotal / hopCountSamples,
+      visibleEntries: visibleEntries,
+      busyness: _busynessForPacketsPerMinute(packetsPerMinute),
+    );
+  }
+
+  static LiveTrafficBusyness _busynessForPacketsPerMinute(int ppm) {
+    if (ppm <= 5) return LiveTrafficBusyness.quiet;
+    if (ppm <= 20) return LiveTrafficBusyness.active;
+    return LiveTrafficBusyness.busy;
+  }
+}

lib/services/message_storage_service.dart

@@ -19,6 +19,8 @@ class MessageStorageService {
       'stored_message_transfer_details';
   static const String _messageRouteMetadataKey =
       'stored_message_route_metadata';
+  static const String _embeddedReceptionDetailsKey = 'storedReceptionDetails';
+  static const String _legacyPathBytesKey = 'storedPathBytes';
   static const int _maxStoredMessages = 1000; // Store up to 1000 messages
 
   /// Save messages to persistent storage
@@ -32,8 +34,16 @@ class MessageStorageService {
     try {
       final prefs = await SharedPreferences.getInstance();
 
-      // Convert messages to JSON
-      final jsonList = messages.map((msg) => _messageToJson(msg)).toList();
+      // Convert messages to JSON and embed path bytes as a fallback so they
+      // survive restore even if the sidecar reception-details entry is absent.
+      final jsonList = messages
+          .map(
+            (msg) => _messageToJson(
+              msg,
+              receptionDetails: messageReceptionDetails[msg.id],
+            ),
+          )
+          .toList();
 
       // Limit to max stored messages (keep most recent)
       final limitedList = jsonList.length > _maxStoredMessages
@@ -129,24 +139,36 @@ class MessageStorageService {
     try {
       final prefs = await SharedPreferences.getInstance();
       final jsonString = prefs.getString(_messageReceptionDetailsKey);
-      if (jsonString == null || jsonString.isEmpty) {
-        return const {};
-      }
-
-      final decoded = jsonDecode(jsonString);
-      if (decoded is! Map<String, dynamic>) {
-        return const {};
-      }
-
       final result = <String, MessageReceptionDetails>{};
-      for (final entry in decoded.entries) {
-        final value = entry.value;
-        if (value is! Map<String, dynamic>) continue;
-        final snapshot = MessageReceptionDetails.fromJson(value);
-        if (snapshot != null) {
-          result[entry.key] = snapshot;
+      if (jsonString != null && jsonString.isNotEmpty) {
+        final decoded = jsonDecode(jsonString);
+        if (decoded is Map<String, dynamic>) {
+          for (final entry in decoded.entries) {
+            final value = entry.value;
+            if (value is! Map<String, dynamic>) continue;
+            final snapshot = MessageReceptionDetails.fromJson(value);
+            if (snapshot != null) {
+              result[entry.key] = snapshot;
+            }
+          }
         }
       }
+
+      final embeddedReceptionDetails = await _loadEmbeddedReceptionDetails();
+      embeddedReceptionDetails.forEach((messageId, snapshot) {
+        result.putIfAbsent(messageId, () => snapshot);
+      });
+
+      final fallbackPathBytes = await _loadLegacyPathBytesFromMessages();
+      fallbackPathBytes.forEach((messageId, pathBytes) {
+        result.putIfAbsent(
+          messageId,
+          () => MessageReceptionDetails(
+            capturedAt: DateTime.fromMillisecondsSinceEpoch(0),
+            pathBytes: pathBytes,
+          ),
+        );
+      });
       return result;
     } catch (e) {
       debugPrint('❌ [MessageStorage] Error loading reception details: $e');
@@ -278,7 +300,10 @@ class MessageStorageService {
   }
 
   /// Convert Message to JSON
-  Map<String, dynamic> _messageToJson(Message message) {
+  Map<String, dynamic> _messageToJson(
+    Message message, {
+    MessageReceptionDetails? receptionDetails,
+  }) {
     return {
       'id': message.id,
       'messageType': message.messageType.name,
@@ -338,9 +363,67 @@ class MessageStorageService {
             },
           )
           .toList(),
+      if (receptionDetails != null)
+        _embeddedReceptionDetailsKey: receptionDetails.toJson(),
+      if (receptionDetails?.pathBytes case final pathBytes?)
+        _legacyPathBytesKey: List<int>.from(pathBytes),
     };
   }
 
+  Future<Map<String, MessageReceptionDetails>>
+  _loadEmbeddedReceptionDetails() async {
+    final prefs = await SharedPreferences.getInstance();
+    final jsonString = prefs.getString(_messagesKey);
+    if (jsonString == null || jsonString.isEmpty) {
+      return const {};
+    }
+
+    final decoded = jsonDecode(jsonString);
+    if (decoded is! List) {
+      return const {};
+    }
+
+    final result = <String, MessageReceptionDetails>{};
+    for (final entry in decoded) {
+      if (entry is! Map<String, dynamic>) continue;
+      final messageId = entry['id'];
+      final embedded = entry[_embeddedReceptionDetailsKey];
+      if (messageId is! String || embedded is! Map<String, dynamic>) continue;
+      final snapshot = MessageReceptionDetails.fromJson(embedded);
+      if (snapshot == null) continue;
+      result[messageId] = snapshot;
+    }
+    return result;
+  }
+
+  Future<Map<String, List<int>>> _loadLegacyPathBytesFromMessages() async {
+    final prefs = await SharedPreferences.getInstance();
+    final jsonString = prefs.getString(_messagesKey);
+    if (jsonString == null || jsonString.isEmpty) {
+      return const {};
+    }
+
+    final decoded = jsonDecode(jsonString);
+    if (decoded is! List) {
+      return const {};
+    }
+
+    final result = <String, List<int>>{};
+    for (final entry in decoded) {
+      if (entry is! Map<String, dynamic>) continue;
+      final messageId = entry['id'];
+      final pathBytes = entry[_legacyPathBytesKey];
+      if (messageId is! String || pathBytes is! List) continue;
+      final normalized = pathBytes
+          .whereType<num>()
+          .map((b) => b.toInt())
+          .toList();
+      if (normalized.isEmpty) continue;
+      result[messageId] = normalized;
+    }
+    return result;
+  }
+
   /// Convert JSON to Message
   Message? _messageFromJson(Map<String, dynamic> json) {
     try {

lib/services/path_history_service.dart

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

lib/services/voice_codec_preferences.dart

@@ -0,0 +1,21 @@
+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/services/voice_codec_service_io.dart

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

lib/services/voice_codec_service_stub.dart

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

lib/services/voice_player_service.dart

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

lib/services/voice_recorder_service.dart

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

lib/utils/log_rx_route_decoder.dart

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

lib/utils/trace_node_resolver.dart

@@ -0,0 +1,132 @@
+import 'package:latlong2/latlong.dart';
+
+import '../services/mesh_map_nodes_service.dart';
+
+class ResolvedTraceNode {
+  final MeshMapNode? node;
+  final int matchCount;
+  final bool usedOnlineFallback;
+
+  const ResolvedTraceNode({
+    required this.node,
+    required this.matchCount,
+    required this.usedOnlineFallback,
+  });
+
+  bool get hasMatch => node != null;
+  bool get isAmbiguous => matchCount > 1;
+
+  String? get matchSummary {
+    if (matchCount <= 1) return null;
+    final source = usedOnlineFallback ? 'online' : 'local';
+    return '$matchCount $source matches';
+  }
+}
+
+class TraceNodeResolver {
+  static const Distance _distance = Distance();
+
+  const TraceNodeResolver._();
+
+  static ResolvedTraceNode resolveBest({
+    required List<MeshMapNode> nodes,
+    required Set<String> localPublicKeys,
+    required String? prefixHex,
+    LatLng? referenceA,
+    LatLng? referenceB,
+    String? preferredPrefix,
+  }) {
+    if (prefixHex == null || prefixHex.isEmpty) {
+      return const ResolvedTraceNode(
+        node: null,
+        matchCount: 0,
+        usedOnlineFallback: false,
+      );
+    }
+
+    final allMatches = nodes
+        .where((n) => n.publicKey.startsWith(prefixHex))
+        .toList();
+    if (allMatches.isEmpty) {
+      return const ResolvedTraceNode(
+        node: null,
+        matchCount: 0,
+        usedOnlineFallback: false,
+      );
+    }
+
+    final localMatches = allMatches
+        .where((node) => localPublicKeys.contains(node.publicKey))
+        .toList();
+    var pool = localMatches.isNotEmpty ? localMatches : allMatches;
+    final usedOnlineFallback = localMatches.isEmpty;
+
+    if (preferredPrefix != null && preferredPrefix.isNotEmpty) {
+      final preferredMatches = pool
+          .where((node) => node.publicKey.startsWith(preferredPrefix))
+          .toList();
+      if (preferredMatches.isNotEmpty) {
+        pool = preferredMatches;
+      }
+    }
+
+    pool.sort((a, b) {
+      final distanceCompare =
+          _scoreNode(
+            a,
+            referenceA: referenceA,
+            referenceB: referenceB,
+          ).compareTo(
+            _scoreNode(b, referenceA: referenceA, referenceB: referenceB),
+          );
+      if (distanceCompare != 0) return distanceCompare;
+      return b.updatedAtMs.compareTo(a.updatedAtMs);
+    });
+
+    return ResolvedTraceNode(
+      node: pool.first,
+      matchCount: pool.length,
+      usedOnlineFallback: usedOnlineFallback,
+    );
+  }
+
+  static double _scoreNode(
+    MeshMapNode node, {
+    LatLng? referenceA,
+    LatLng? referenceB,
+  }) {
+    final point = LatLng(node.latitude, node.longitude);
+    if (referenceA != null && referenceB != null) {
+      return _distanceToSegmentMeters(point, referenceA, referenceB);
+    }
+    if (referenceA != null) {
+      return _distance.as(LengthUnit.Meter, point, referenceA);
+    }
+    if (referenceB != null) {
+      return _distance.as(LengthUnit.Meter, point, referenceB);
+    }
+    return double.maxFinite;
+  }
+
+  static double _distanceToSegmentMeters(LatLng p, LatLng a, LatLng b) {
+    final ax = a.longitude;
+    final ay = a.latitude;
+    final bx = b.longitude;
+    final by = b.latitude;
+    final px = p.longitude;
+    final py = p.latitude;
+
+    final abx = bx - ax;
+    final aby = by - ay;
+    final apx = px - ax;
+    final apy = py - ay;
+    final ab2 = abx * abx + aby * aby;
+    if (ab2 == 0) {
+      return _distance.as(LengthUnit.Meter, a, p);
+    }
+    var t = (apx * abx + apy * aby) / ab2;
+    t = t.clamp(0.0, 1.0);
+    final closest = LatLng(ay + aby * t, ax + abx * t);
+    return _distance.as(LengthUnit.Meter, closest, p);
+  }
+}

lib/utils/voice_message_parser.dart

@@ -11,20 +11,41 @@ const int _defaultLoRaCrcEnabled = 1;
 const int _defaultLoRaExplicitHeader = 1;
 const double _defaultAirtimeBudgetFactor = 1.0; // one half duty-cycle
 
-/// Identifies which Codec2 mode was used for a voice packet.
-/// Matches the modeId byte in the text/binary packet header.
-enum VoicePacketMode {
-  mode700c(0, '700C'),
-  mode1200(1, '1200'),
-  mode2400(2, '2400'),
-  mode1300(3, '1300'),
-  mode1400(4, '1400'),
-  mode1600(5, '1600'),
-  mode3200(6, '3200');
+enum VoiceCodecKind {
+  codec2(0, 'Codec2');
 
-  const VoicePacketMode(this.id, this.label);
+  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);
+
+  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;
+
+  int get samplesPerPacket => sampleRateHz * packetDurationMs ~/ 1000;
 
   static VoicePacketMode fromId(int id) => VoicePacketMode.values.firstWhere(
     (m) => m.id == id,
@@ -153,23 +174,21 @@ class VoicePacket {
 
   /// Estimated audio duration of this packet in milliseconds.
   int get durationMs {
-    // bytesPerSecond for each mode
-    final bps = switch (mode) {
-      VoicePacketMode.mode700c => 100,
-      VoicePacketMode.mode1200 => 150,
-      VoicePacketMode.mode1300 => 175,
-      VoicePacketMode.mode1400 => 175,
-      VoicePacketMode.mode1600 => 200,
-      VoicePacketMode.mode2400 => 300,
-      VoicePacketMode.mode3200 => 400,
-    };
-    if (bps == 0) return 0;
-    return (codec2Data.length * 1000 ~/ bps).clamp(0, 1500);
+    try {
+      final bytesPerSecond = voiceModeBytesPerSecond(mode);
+      if (bytesPerSecond <= 0) return 0;
+      return (codec2Data.length * 1000 ~/ bytesPerSecond).clamp(0, 1500);
+    } catch (_) {
+      // Be permissive with stale or malformed persisted voice metadata.
+      return 0;
+    }
   }
 
   @override
   String toString() {
-    final suffix = total > 0 ? ' ${mode.label} [$index/${total - 1}]' : ' [$index]';
+    final suffix = total > 0
+        ? ' ${mode.label} [$index/${total - 1}]'
+        : ' [$index]';
     return 'VoicePacket($sessionId$suffix ${codec2Data.length}B)';
   }
 }
@@ -244,10 +263,10 @@ class VoiceEnvelope {
 int voiceModeBytesPerSecond(VoicePacketMode mode) => switch (mode) {
   VoicePacketMode.mode700c => 100,
   VoicePacketMode.mode1200 => 150,
+  VoicePacketMode.mode2400 => 300,
   VoicePacketMode.mode1300 => 175,
   VoicePacketMode.mode1400 => 175,
   VoicePacketMode.mode1600 => 200,
-  VoicePacketMode.mode2400 => 300,
   VoicePacketMode.mode3200 => 400,
 };
 
@@ -419,8 +438,7 @@ class VoiceFetchRequest {
     this.version = 3,
   });
 
-  static bool isVoiceFetchRequestText(String text) =>
-      text.startsWith(_prefix);
+  static bool isVoiceFetchRequestText(String text) => text.startsWith(_prefix);
   static bool isVoiceFetchRequestBinary(Uint8List payload) =>
       payload.isNotEmpty && payload[0] == _binaryMagic;
 
@@ -473,9 +491,7 @@ class VoiceFetchRequest {
       final requesterKey6 = parts[2];
       final normalizedWant = wantToken == 'a'
           ? 'all'
-          : ((wantToken.startsWith('m'))
-                ? 'missing'
-                : wantToken);
+          : ((wantToken.startsWith('m')) ? 'missing' : wantToken);
 
       if (sid == null) {
         return null;
@@ -602,7 +618,11 @@ String _toBase36(int value) => value.toRadixString(36);
 
 String _encodeSessionId(String sessionIdHex) {
   if (!RegExp(r'^[0-9a-fA-F]{8}$').hasMatch(sessionIdHex)) {
-    throw ArgumentError.value(sessionIdHex, 'sessionIdHex', 'Expected 8 hex chars');
+    throw ArgumentError.value(
+      sessionIdHex,
+      'sessionIdHex',
+      'Expected 8 hex chars',
+    );
   }
   final value = int.parse(sessionIdHex, radix: 16);
   return value.toRadixString(36);
@@ -616,10 +636,7 @@ String? _decodeSessionId(String token) {
 }
 
 String _encodeMissingIndicesCompact(List<int> indices) {
-  final sorted = indices
-      .where((v) => v >= 0 && v <= 254)
-      .toSet()
-      .toList()
+  final sorted = indices.where((v) => v >= 0 && v <= 254).toSet().toList()
     ..sort();
   if (sorted.isEmpty) return '';
   final chunks = <String>[];
@@ -632,7 +649,9 @@ String _encodeMissingIndicesCompact(List<int> indices) {
       continue;
     }
     chunks.add(
-      start == prev ? _toBase36(start) : '${_toBase36(start)}-${_toBase36(prev)}',
+      start == prev
+          ? _toBase36(start)
+          : '${_toBase36(start)}-${_toBase36(prev)}',
     );
     start = curr;
     prev = curr;

lib/widgets/contacts/contact_route_dialog.dart

@@ -1,19 +1,40 @@
 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 '../../providers/app_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;
   final bool shouldClear;
+  final LatLng? inferredFallbackLocation;
 
-  const ContactRouteDialogResult._({this.route, required this.shouldClear});
+  const ContactRouteDialogResult._({
+    this.route,
+    required this.shouldClear,
+    this.inferredFallbackLocation,
+  });
 
   const ContactRouteDialogResult.set(ParsedContactRoute route)
     : this._(route: route, shouldClear: false);
 
+  const ContactRouteDialogResult.setWithFallback(
+    ParsedContactRoute route, {
+    LatLng? inferredFallbackLocation,
+  }) : this._(
+         route: route,
+         shouldClear: false,
+         inferredFallbackLocation: inferredFallbackLocation,
+       );
+
   const ContactRouteDialogResult.clear() : this._(shouldClear: true);
 }
 
@@ -56,10 +77,14 @@ class ContactRouteDialog extends StatefulWidget {
 
 class _ContactRouteDialogState extends State<ContactRouteDialog> {
   late final TextEditingController _controller;
+  final PathHistoryService _pathHistoryService = PathHistoryService();
   int _selectedHashSize = RouteHashPreferences.defaultHashSize;
   ParsedContactRoute? _parsedRoute;
   String? _errorText;
   bool _showRoutingInfo = false;
+  List<Contact> _selectedMapHops = const [];
+  ContactPathHistory? _pathHistory;
+  _RouteEntryMode _entryMode = _RouteEntryMode.map;
 
   @override
   void initState() {
@@ -68,7 +93,11 @@ class _ContactRouteDialogState extends State<ContactRouteDialog> {
       text: widget.contact.routeCanonicalText,
     );
     _controller.addListener(_reparse);
+    _entryMode = widget.contact.routeCanonicalText.isNotEmpty
+        ? _RouteEntryMode.manual
+        : _RouteEntryMode.map;
     _loadHashSizePreference();
+    _loadPathHistory();
     _reparse();
   }
 
@@ -86,6 +115,7 @@ class _ContactRouteDialogState extends State<ContactRouteDialog> {
       setState(() {
         _parsedRoute = null;
         _errorText = null;
+        _selectedMapHops = const [];
       });
       return;
     }
@@ -95,9 +125,11 @@ class _ContactRouteDialogState extends State<ContactRouteDialog> {
         input,
         expectedHashSize: _selectedHashSize,
       );
+      final selectedMapHops = _mapSelectionForText(input);
       setState(() {
         _parsedRoute = parsed;
         _errorText = null;
+        _selectedMapHops = selectedMapHops;
       });
     } on ContactRouteFormatException catch (error) {
       setState(() {
@@ -107,6 +139,36 @@ class _ContactRouteDialogState extends State<ContactRouteDialog> {
     }
   }
 
+  List<Contact> get _routeCandidates =>
+      widget.availableContacts
+          .where(
+            (contact) => contact.isRepeater && contact.displayLocation != null,
+          )
+          .toList()
+        ..sort((a, b) => a.displayName.compareTo(b.displayName));
+
+  List<Contact> _mapSelectionForText(String text) {
+    final tokens = text
+        .trim()
+        .split(',')
+        .map((token) => token.trim().toUpperCase())
+        .where((token) => token.isNotEmpty)
+        .toList();
+    final selected = <Contact>[];
+    final seen = <String>{};
+    for (final token in tokens) {
+      final match = _routeCandidates
+          .where(
+            (contact) => contact.publicKeyHex.toUpperCase().startsWith(token),
+          )
+          .firstOrNull;
+      if (match != null && seen.add(match.publicKeyHex)) {
+        selected.add(match);
+      }
+    }
+    return selected;
+  }
+
   Future<void> _loadHashSizePreference() async {
     final hashSize = await RouteHashPreferences.getHashSize();
     if (!mounted) return;
@@ -116,6 +178,16 @@ class _ContactRouteDialogState extends State<ContactRouteDialog> {
     _reparse();
   }
 
+  Future<void> _loadPathHistory() async {
+    await _pathHistoryService.initialize();
+    if (!mounted) return;
+    setState(() {
+      _pathHistory = _pathHistoryService.historyFor(
+        widget.contact.publicKeyHex,
+      );
+    });
+  }
+
   String _tokenFor(Contact contact, int hashSize) {
     final hex = contact.publicKeyHex.toUpperCase();
     final length = hashSize * 2;
@@ -125,137 +197,647 @@ class _ContactRouteDialogState extends State<ContactRouteDialog> {
     return hex.substring(0, length);
   }
 
-  void _appendHop(Contact contact) {
-    final token = _tokenFor(contact, _selectedHashSize);
-    final current = _controller.text.trim();
-    _controller.text = current.isEmpty ? token : '$current,$token';
+  void _syncControllerFromSelectedHops() {
+    final tokens = _selectedMapHops
+        .map((contact) => _tokenFor(contact, _selectedHashSize))
+        .toList();
+    _controller.text = tokens.join(',');
     _controller.selection = TextSelection.fromPosition(
       TextPosition(offset: _controller.text.length),
     );
   }
 
+  void _toggleHop(Contact contact) {
+    setState(() {
+      if (_selectedMapHops.any(
+        (item) => item.publicKeyHex == contact.publicKeyHex,
+      )) {
+        _selectedMapHops = _selectedMapHops
+            .where((item) => item.publicKeyHex != contact.publicKeyHex)
+            .toList();
+      } else {
+        _selectedMapHops = [..._selectedMapHops, contact];
+      }
+      _syncControllerFromSelectedHops();
+      _reparse();
+    });
+  }
+
+  void _applyResolvedPlan(ResolvedContactRoutePlan plan) {
+    setState(() {
+      _selectedMapHops = plan.selectedContacts;
+      _controller.text = plan.canonicalText;
+      _controller.selection = TextSelection.fromPosition(
+        TextPosition(offset: _controller.text.length),
+      );
+      _errorText = null;
+      _entryMode = _RouteEntryMode.map;
+    });
+    _reparse();
+  }
+
+  void _applyHistoryRecord(PathRecord record) {
+    final canonicalText = _canonicalRouteFromBytes(
+      record.pathBytes,
+      hashSize: record.hashSize,
+    );
+    setState(() {
+      _controller.text = canonicalText;
+      _controller.selection = TextSelection.fromPosition(
+        TextPosition(offset: _controller.text.length),
+      );
+      _errorText = null;
+      _entryMode = _RouteEntryMode.manual;
+    });
+    _reparse();
+  }
+
+  LatLng? _resolveLastHopLocation() {
+    if (_selectedMapHops.isNotEmpty) {
+      return _selectedMapHops.last.displayLocation == null
+          ? null
+          : LatLng(
+              _selectedMapHops.last.displayLocation!.latitude,
+              _selectedMapHops.last.displayLocation!.longitude,
+            );
+    }
+
+    final tokens = _controller.text
+        .trim()
+        .split(',')
+        .map((token) => token.trim().toUpperCase())
+        .where((token) => token.isNotEmpty)
+        .toList();
+    if (tokens.isEmpty) return null;
+    final lastToken = tokens.last;
+    final match = _routeCandidates
+        .where(
+          (contact) => contact.publicKeyHex.toUpperCase().startsWith(lastToken),
+        )
+        .firstOrNull;
+    final location = match?.displayLocation;
+    if (location == null) return null;
+    return LatLng(location.latitude, location.longitude);
+  }
+
+  LatLng? _buildSyntheticFallbackLocation() {
+    final lastHopLocation = _resolveLastHopLocation();
+    if (lastHopLocation == null) return null;
+
+    final seed = widget.contact.publicKey.fold<int>(
+      _controller.text.codeUnits.fold<int>(0, (sum, unit) => sum + unit),
+      (sum, byte) => sum + byte,
+    );
+    final angle = (seed % 360) * (math.pi / 180.0);
+    const radiusMeters = 500.0;
+    final latOffset = (radiusMeters / 111320.0) * math.cos(angle);
+    final lonDenominator =
+        111320.0 * math.cos(lastHopLocation.latitude * (math.pi / 180.0));
+    final lonOffset = lonDenominator.abs() < 1e-6
+        ? 0.0
+        : (radiusMeters / lonDenominator) * math.sin(angle);
+    return LatLng(
+      lastHopLocation.latitude + latOffset,
+      lastHopLocation.longitude + lonOffset,
+    );
+  }
+
+  void _resolvePathAutomatically() {
+    final connectionProvider = context.read<ConnectionProvider>();
+    final advLat = connectionProvider.deviceInfo.advLat;
+    final advLon = connectionProvider.deviceInfo.advLon;
+    final recipientLocation = widget.contact.displayLocation;
+    if (advLat == null ||
+        advLon == null ||
+        (advLat == 0 && advLon == 0) ||
+        recipientLocation == null) {
+      setState(() {
+        _errorText =
+            'Automatic resolve needs both your advertised location and the contact location.';
+      });
+      return;
+    }
+
+    final plan = ContactRouteResolver.resolveAutomaticRoute(
+      senderLocation: LatLng(advLat / 1e6, advLon / 1e6),
+      recipient: widget.contact,
+      availableContacts: widget.availableContacts,
+      hashSize: _selectedHashSize,
+    );
+    if (plan == null) {
+      setState(() {
+        _errorText =
+            'Could not resolve a route from available repeater locations.';
+      });
+      return;
+    }
+
+    _applyResolvedPlan(plan);
+  }
+
+  String _canonicalRouteFromBytes(
+    List<int> pathBytes, {
+    required int hashSize,
+  }) {
+    final hops = <String>[];
+    for (var i = 0; i < pathBytes.length; i += hashSize) {
+      final hop = pathBytes.sublist(i, i + hashSize);
+      hops.add(
+        hop
+            .map((byte) => byte.toRadixString(16).padLeft(2, '0'))
+            .join()
+            .toUpperCase(),
+      );
+    }
+    return hops.join(',');
+  }
+
+  String _historySubtitle(PathRecord record) {
+    final attempts = record.successCount + record.failureCount;
+    final lastSeen = MaterialLocalizations.of(
+      context,
+    ).formatShortDate(record.lastUsedAt);
+    final sourceLabel = switch (record.source) {
+      PathRecordSource.observed => 'Observed on mesh',
+      PathRecordSource.learned => 'Learned route',
+    };
+    final successRate = attempts == 0
+        ? 'No send stats yet'
+        : '${(record.successRate * 100).round()}% success over $attempts send${attempts == 1 ? '' : 's'}';
+    final latency = record.lastRoundTripTimeMs > 0
+        ? ' • ${record.lastRoundTripTimeMs} ms'
+        : '';
+    return '$sourceLabel • $successRate • Last used $lastSeen$latency';
+  }
+
+  Widget _buildHistoryRecordTile(PathRecord record, {String? title}) {
+    final canonicalText = _canonicalRouteFromBytes(
+      record.pathBytes,
+      hashSize: record.hashSize,
+    );
+    return Card(
+      margin: EdgeInsets.zero,
+      child: ListTile(
+        contentPadding: const EdgeInsets.symmetric(
+          horizontal: 16,
+          vertical: 10,
+        ),
+        leading: title == null ? null : const Icon(Icons.alt_route),
+        title: title == null
+            ? Text(
+                canonicalText,
+                style: Theme.of(
+                  context,
+                ).textTheme.bodyMedium?.copyWith(fontFamily: 'monospace'),
+              )
+            : Column(
+                crossAxisAlignment: CrossAxisAlignment.start,
+                children: [
+                  Text(title, style: Theme.of(context).textTheme.titleSmall),
+                  const SizedBox(height: 6),
+                  Text(
+                    canonicalText,
+                    style: Theme.of(
+                      context,
+                    ).textTheme.bodyMedium?.copyWith(fontFamily: 'monospace'),
+                  ),
+                ],
+              ),
+        subtitle: Padding(
+          padding: const EdgeInsets.only(top: 6),
+          child: Text(_historySubtitle(record)),
+        ),
+        trailing: FilledButton.tonal(
+          onPressed: () => _applyHistoryRecord(record),
+          child: const Text('Use'),
+        ),
+      ),
+    );
+  }
+
+  Widget _buildPreviewSection() {
+    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'),
+          ),
+        ],
+      ],
+    );
+  }
+
+  Widget _buildBuilderTab(
+    BuildContext context, {
+    required List<Contact> routeCandidates,
+    required List<LatLng> mapPoints,
+    required List<LatLng> routePoints,
+  }) {
+    return Column(
+      crossAxisAlignment: CrossAxisAlignment.start,
+      children: [
+        SegmentedButton<_RouteEntryMode>(
+          segments: const [
+            ButtonSegment<_RouteEntryMode>(
+              value: _RouteEntryMode.map,
+              icon: Icon(Icons.map_outlined),
+              label: Text('Map'),
+            ),
+            ButtonSegment<_RouteEntryMode>(
+              value: _RouteEntryMode.manual,
+              icon: Icon(Icons.tune),
+              label: Text('Manual'),
+            ),
+          ],
+          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(),
+        ],
+      ],
+    );
+  }
+
+  Widget _buildHistoryTab() {
+    final records = List<PathRecord>.from(_pathHistory?.directPaths ?? const [])
+      ..sort((a, b) => b.lastUsedAt.compareTo(a.lastUsedAt));
+    if (records.isEmpty) {
+      return Center(
+        child: Padding(
+          padding: const EdgeInsets.all(24),
+          child: Text(
+            'No historical paths for this contact yet.',
+            style: Theme.of(context).textTheme.bodyMedium,
+            textAlign: TextAlign.center,
+          ),
+        ),
+      );
+    }
+
+    PathRecord? observedRecord;
+    for (final record in records) {
+      if (record.source == PathRecordSource.observed) {
+        observedRecord = record;
+        break;
+      }
+    }
+    final remainingRecords = observedRecord == null
+        ? records
+        : records
+              .where((record) => !identical(record, observedRecord))
+              .toList();
+
+    return Column(
+      crossAxisAlignment: CrossAxisAlignment.start,
+      children: [
+        if (observedRecord != null) ...[
+          _buildHistoryRecordTile(observedRecord, title: 'Observed mesh route'),
+          const SizedBox(height: 16),
+        ],
+        if (remainingRecords.isEmpty)
+          Text(
+            observedRecord == null
+                ? 'No additional route history yet.'
+                : 'Observed routes you start using will continue to build history here.',
+            style: Theme.of(context).textTheme.bodyMedium,
+          )
+        else
+          ListView.separated(
+            itemCount: remainingRecords.length,
+            shrinkWrap: true,
+            physics: const NeverScrollableScrollPhysics(),
+            separatorBuilder: (_, _) => const SizedBox(height: 8),
+            itemBuilder: (context, index) {
+              return _buildHistoryRecordTile(remainingRecords[index]);
+            },
+          ),
+      ],
+    );
+  }
+
   @override
   Widget build(BuildContext context) {
     final appProvider = context.watch<AppProvider>();
-    final routeCandidates =
-        widget.availableContacts
-            .where((contact) => contact.isRepeater || contact.isRoom)
-            .toList()
-          ..sort((a, b) => a.displayName.compareTo(b.displayName));
+    final routeCandidates = _routeCandidates;
+    final connectionProvider = context.watch<ConnectionProvider>();
+    final selfPoint =
+        connectionProvider.deviceInfo.advLat != null &&
+            connectionProvider.deviceInfo.advLon != null &&
+            !(connectionProvider.deviceInfo.advLat == 0 &&
+                connectionProvider.deviceInfo.advLon == 0)
+        ? LatLng(
+            connectionProvider.deviceInfo.advLat! / 1e6,
+            connectionProvider.deviceInfo.advLon! / 1e6,
+          )
+        : null;
+    final recipientLocation = widget.contact.displayLocation;
+    final recipientPoint = recipientLocation == null
+        ? null
+        : LatLng(recipientLocation.latitude, recipientLocation.longitude);
+    final routePoints = <LatLng>[
+      ...?selfPoint == null ? null : [selfPoint],
+      ..._selectedMapHops
+          .where((contact) => contact.displayLocation != null)
+          .map(
+            (contact) => LatLng(
+              contact.displayLocation!.latitude,
+              contact.displayLocation!.longitude,
+            ),
+          ),
+      ...?recipientPoint == null ? null : [recipientPoint],
+    ];
+    final mapPoints = <LatLng>[
+      ...?selfPoint == null ? null : [selfPoint],
+      ...?recipientPoint == null ? null : [recipientPoint],
+      ...routeCandidates.map(
+        (contact) => LatLng(
+          contact.displayLocation!.latitude,
+          contact.displayLocation!.longitude,
+        ),
+      ),
+    ];
 
-    return 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: 16),
-            TextField(
-              controller: _controller,
-              textCapitalization: TextCapitalization.characters,
-              decoration: InputDecoration(
-                labelText: 'Route',
-                hintText: _selectedHashSize == 1
-                    ? 'AA,BB,CC'
-                    : _selectedHashSize == 2
-                    ? 'AABB,CCDD'
-                    : 'AABBCC,DDEEFF',
-                helperText:
-                    'Use comma-separated hops. Path byte size comes from global Settings. Colon form like AA:BB is also accepted.',
-                errorText: _errorText,
-                border: const OutlineInputBorder(),
+    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: 12),
-            Text(
-              _parsedRoute == null
-                  ? 'Preview: enter 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'),
+              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,
+                        children: [
+                          _buildBuilderTab(
+                            context,
+                            routeCandidates: routeCandidates,
+                            mapPoints: mapPoints,
+                            routePoints: routePoints,
+                          ),
+                          const SizedBox(height: 16),
+                          _AutomationRoutingInfo(
+                            isExpanded: _showRoutingInfo,
+                            onToggle: () {
+                              setState(() {
+                                _showRoutingInfo = !_showRoutingInfo;
+                              });
+                            },
+                            autoRouteRotationEnabled:
+                                appProvider.autoRouteRotationEnabled,
+                            nearestRelayFallbackEnabled:
+                                appProvider.nearestRelayFallbackEnabled,
+                            clearPathOnMaxRetry:
+                                appProvider.clearPathOnMaxRetry,
+                          ),
+                        ],
+                      ),
+                    ),
+                    SingleChildScrollView(child: _buildHistoryTab()),
+                  ],
+                ),
+              ),
+              OverflowBar(
+                alignment: MainAxisAlignment.spaceBetween,
+                spacing: 8,
+                overflowSpacing: 8,
+                children: [
+                  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(),
+                            ),
+                          ),
+                    child: const Text('Set Route'),
+                  ),
+                ],
               ),
             ],
-            const SizedBox(height: 16),
-            _AutomationRoutingInfo(
-              isExpanded: _showRoutingInfo,
-              onToggle: () {
-                setState(() {
-                  _showRoutingInfo = !_showRoutingInfo;
-                });
-              },
-              autoRouteRotationEnabled: appProvider.autoRouteRotationEnabled,
-              nearestRelayFallbackEnabled:
-                  appProvider.nearestRelayFallbackEnabled,
-              clearPathOnMaxRetry: appProvider.clearPathOnMaxRetry,
-            ),
-            const SizedBox(height: 16),
-            Text(
-              'Pick hops from contacts',
-              style: Theme.of(context).textTheme.labelLarge,
-            ),
-            const SizedBox(height: 8),
-            if (routeCandidates.isEmpty)
-              const Text(
-                'No repeater or room contacts are available for route building.',
-              )
-            else
-              Expanded(
-                child: ListView.builder(
-                  itemCount: routeCandidates.length,
-                  itemBuilder: (context, index) {
-                    final candidate = routeCandidates[index];
-                    return ListTile(
-                      dense: true,
-                      contentPadding: EdgeInsets.zero,
-                      title: Text(candidate.displayName),
-                      trailing: TextButton(
-                        onPressed: () => _appendHop(candidate),
-                        child: Text(
-                          'Use ${_tokenFor(candidate, _selectedHashSize)}',
-                        ),
-                      ),
-                    );
-                  },
-                ),
-              ),
-            const SizedBox(height: 16),
-            Row(
-              children: [
-                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'),
-                  ),
-                const Spacer(),
-                FilledButton(
-                  onPressed: _parsedRoute == null
-                      ? null
-                      : () => Navigator.of(
-                          context,
-                        ).pop(ContactRouteDialogResult.set(_parsedRoute!)),
-                  child: const Text('Set Route'),
-                ),
-              ],
-            ),
-          ],
+          ),
+        ),
+      ),
+    );
+  }
+}
+
+enum _RouteEntryMode { map, manual }
+
+class _RouteMarkerDot extends StatelessWidget {
+  final String label;
+  final Color color;
+
+  const _RouteMarkerDot({required this.label, required this.color});
+
+  @override
+  Widget build(BuildContext context) {
+    return Tooltip(
+      message: label,
+      child: Center(
+        child: Container(
+          width: 26,
+          height: 26,
+          decoration: BoxDecoration(
+            color: color,
+            shape: BoxShape.circle,
+            border: Border.all(color: Colors.white, width: 2),
+          ),
         ),
       ),
     );

lib/widgets/contacts/contact_tile.dart

@@ -13,6 +13,7 @@ import '../../providers/messages_provider.dart';
 import '../../providers/sensors_provider.dart';
 import '../../services/message_destination_preferences.dart';
 import 'contact_route_dialog.dart';
+import 'contact_trace_sheet.dart';
 import 'room_login_sheet.dart';
 import '../common/contact_avatar.dart';
 import '../../utils/toast_logger.dart';
@@ -20,6 +21,7 @@ import '../../l10n/app_localizations.dart';
 
 class ContactTile extends StatelessWidget {
   final Contact contact;
+  final String? groupLabel;
   final Position? currentPosition;
   final double Function(double, double, double, double)? calculateDistance;
   final String Function(double)? formatDistance;
@@ -29,6 +31,7 @@ class ContactTile extends StatelessWidget {
   const ContactTile({
     super.key,
     required this.contact,
+    this.groupLabel,
     this.currentPosition,
     this.calculateDistance,
     this.formatDistance,
@@ -127,6 +130,25 @@ class ContactTile extends StatelessWidget {
     final Widget subtitleWidget = Column(
       crossAxisAlignment: CrossAxisAlignment.start,
       children: [
+        const SizedBox(height: 4),
+        Wrap(
+          spacing: 6,
+          runSpacing: 6,
+          children: [
+            if (groupLabel case final label?)
+              _buildMetaPill(
+                context,
+                icon: Icons.folder_copy_outlined,
+                label: label,
+              ),
+            _buildMetaPill(
+              context,
+              icon: Icons.key_outlined,
+              label: contact.publicKeyShort,
+              monospace: true,
+            ),
+          ],
+        ),
         if (location != null) ...[
           const SizedBox(height: 2),
           _buildLocationLine(
@@ -363,6 +385,15 @@ class ContactTile extends StatelessWidget {
                   _showSetRouteDialog(context, contact);
                 },
               ),
+            if (!contact.isChannel)
+              ListTile(
+                leading: const Icon(Icons.route),
+                title: const Text('Trace'),
+                onTap: () {
+                  Navigator.pop(sheetContext);
+                  _showTraceSheet(context, contact);
+                },
+              ),
             if (!contact.isPublicChannel)
               ListTile(
                 leading: const Icon(Icons.delete, color: Colors.red),
@@ -453,6 +484,18 @@ class ContactTile extends StatelessWidget {
     );
   }
 
+  void _showTraceSheet(BuildContext context, Contact contact) {
+    showModalBottomSheet(
+      context: context,
+      isScrollControlled: true,
+      backgroundColor: Theme.of(context).colorScheme.surface,
+      shape: const RoundedRectangleBorder(
+        borderRadius: BorderRadius.vertical(top: Radius.circular(16)),
+      ),
+      builder: (context) => ContactTraceSheet(contact: contact),
+    );
+  }
+
   void _showDeleteConfirmation(
     BuildContext context,
     Contact contact, {
@@ -569,6 +612,7 @@ class ContactTile extends StatelessWidget {
       contact.publicKey,
       signedEncodedPathLen: parsedRoute.signedEncodedPathLen,
       paddedPathBytes: parsedRoute.paddedPathBytes,
+      inferredFallbackLocation: routeResult.inferredFallbackLocation,
     );
 
     try {
@@ -649,6 +693,38 @@ class ContactTile extends StatelessWidget {
     );
   }
 
+  Widget _buildMetaPill(
+    BuildContext context, {
+    required IconData icon,
+    required String label,
+    bool monospace = false,
+  }) {
+    final colorScheme = Theme.of(context).colorScheme;
+
+    return Container(
+      padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 4),
+      decoration: BoxDecoration(
+        color: colorScheme.surfaceContainerHighest.withValues(alpha: 0.75),
+        borderRadius: BorderRadius.circular(999),
+      ),
+      child: Row(
+        mainAxisSize: MainAxisSize.min,
+        children: [
+          Icon(icon, size: 12, color: colorScheme.onSurfaceVariant),
+          const SizedBox(width: 4),
+          Text(
+            label,
+            style: Theme.of(context).textTheme.labelSmall?.copyWith(
+              color: colorScheme.onSurfaceVariant,
+              fontWeight: FontWeight.w700,
+              fontFamily: monospace ? 'monospace' : null,
+            ),
+          ),
+        ],
+      ),
+    );
+  }
+
   Widget _buildLocationLine(
     BuildContext context, {
     required double latitude,

lib/widgets/contacts/contact_trace_sheet.dart

@@ -0,0 +1,525 @@
+import 'dart:async';
+import 'dart:math' as math;
+
+import 'package:flutter/material.dart';
+import 'package:flutter_map/flutter_map.dart' as flutter_map;
+import 'package:latlong2/latlong.dart';
+import 'package:provider/provider.dart';
+
+import '../../models/contact.dart';
+import '../../providers/connection_provider.dart';
+import '../../providers/contacts_provider.dart';
+import '../../services/mesh_map_nodes_service.dart';
+import '../../utils/trace_node_resolver.dart';
+
+class ContactTraceSheet extends StatefulWidget {
+  final Contact contact;
+
+  const ContactTraceSheet({super.key, required this.contact});
+
+  @override
+  State<ContactTraceSheet> createState() => _ContactTraceSheetState();
+}
+
+class _ContactTraceSheetState extends State<ContactTraceSheet> {
+  late final Future<_ContactTraceResult> _future;
+
+  @override
+  void initState() {
+    super.initState();
+    _future = _loadTrace();
+  }
+
+  Future<_ContactTraceResult> _loadTrace() async {
+    final connectionProvider = context.read<ConnectionProvider>();
+    final contactsProvider = context.read<ContactsProvider>();
+    final localNodes = _localNodesFromContacts(
+      contactsProvider,
+      connectionProvider: connectionProvider,
+    );
+    final localPublicKeys = localNodes.map((node) => node.publicKey).toSet();
+
+    var trace = _buildTraceResult(
+      nodes: localNodes,
+      localPublicKeys: localPublicKeys,
+      selfPublicKey: connectionProvider.deviceInfo.publicKey,
+    );
+    if (_isCompleteTrace(trace)) {
+      return trace;
+    }
+
+    unawaited(
+      MeshMapNodesService.syncInBackgroundIfStale(
+        cacheTtl: MeshMapNodesService.traceCacheTtl,
+      ),
+    );
+
+    final remoteNodes = await MeshMapNodesService.loadCachedNodes(
+      cacheTtl: MeshMapNodesService.traceCacheTtl,
+    );
+    trace = _buildTraceResult(
+      nodes: _mergeNodes(localNodes, remoteNodes),
+      localPublicKeys: localPublicKeys,
+      selfPublicKey: connectionProvider.deviceInfo.publicKey,
+    );
+    return trace;
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return SafeArea(
+      child: FutureBuilder<_ContactTraceResult>(
+        future: _future,
+        builder: (context, snapshot) {
+          if (snapshot.connectionState != ConnectionState.done) {
+            return const SizedBox(
+              height: 360,
+              child: Center(child: CircularProgressIndicator()),
+            );
+          }
+          if (snapshot.hasError) {
+            return SizedBox(
+              height: 360,
+              child: Center(
+                child: Padding(
+                  padding: const EdgeInsets.all(16),
+                  child: Text('Failed to load trace: ${snapshot.error}'),
+                ),
+              ),
+            );
+          }
+
+          final trace = snapshot.data!;
+          final routeEntries = _displayRouteEntries(trace);
+          final concreteNodes = routeEntries
+              .where((entry) => entry.resolved.node != null)
+              .map((entry) => entry.resolved.node!)
+              .toList();
+          final mapPoints = concreteNodes
+              .map((node) => LatLng(node.latitude, node.longitude))
+              .toList();
+          final hasMapPath = mapPoints.length >= 2;
+          final relayNodes = trace.matchedRelayNodes.whereType<MeshMapNode>();
+
+          return SizedBox(
+            height: MediaQuery.of(context).size.height * 0.75,
+            child: Column(
+              crossAxisAlignment: CrossAxisAlignment.start,
+              children: [
+                const SizedBox(height: 12),
+                Center(
+                  child: Container(
+                    width: 40,
+                    height: 4,
+                    decoration: BoxDecoration(
+                      color: Theme.of(context).dividerColor,
+                      borderRadius: BorderRadius.circular(2),
+                    ),
+                  ),
+                ),
+                Padding(
+                  padding: const EdgeInsets.fromLTRB(16, 14, 16, 8),
+                  child: Text(
+                    'Trace',
+                    style: Theme.of(context).textTheme.titleLarge,
+                  ),
+                ),
+                Padding(
+                  padding: const EdgeInsets.symmetric(horizontal: 16),
+                  child: Text(
+                    trace.routeHashes.isEmpty
+                        ? 'Direct route to ${widget.contact.displayName}'
+                        : 'Route from saved contact path (${trace.routeHashes.length} hop${trace.routeHashes.length == 1 ? '' : 's'})',
+                    style: Theme.of(context).textTheme.bodySmall,
+                  ),
+                ),
+                const SizedBox(height: 10),
+                Expanded(
+                  child: ListView(
+                    padding: const EdgeInsets.only(bottom: 16),
+                    children: [
+                      Padding(
+                        padding: const EdgeInsets.symmetric(horizontal: 16),
+                        child: SizedBox(
+                          height: 240,
+                          child: ClipRRect(
+                            borderRadius: BorderRadius.circular(12),
+                            child: DecoratedBox(
+                              decoration: BoxDecoration(
+                                border: Border.all(
+                                  color: Theme.of(context).dividerColor,
+                                ),
+                              ),
+                              child: hasMapPath
+                                  ? flutter_map.FlutterMap(
+                                      options: flutter_map.MapOptions(
+                                        initialCameraFit:
+                                            flutter_map.CameraFit.bounds(
+                                              bounds:
+                                                  flutter_map
+                                                      .LatLngBounds.fromPoints(
+                                                    mapPoints,
+                                                  ),
+                                              padding: const EdgeInsets.all(28),
+                                            ),
+                                      ),
+                                      children: [
+                                        flutter_map.TileLayer(
+                                          urlTemplate:
+                                              'https://tile.openstreetmap.org/{z}/{x}/{y}.png',
+                                          userAgentPackageName:
+                                              'com.meshcore.sar',
+                                        ),
+                                        flutter_map.PolylineLayer(
+                                          polylines: [
+                                            flutter_map.Polyline(
+                                              points: mapPoints,
+                                              strokeWidth: 4,
+                                              color: Theme.of(
+                                                context,
+                                              ).colorScheme.primary,
+                                            ),
+                                          ],
+                                        ),
+                                        flutter_map.MarkerLayer(
+                                          markers: concreteNodes
+                                              .asMap()
+                                              .entries
+                                              .map(
+                                                (entry) => flutter_map.Marker(
+                                                  point: LatLng(
+                                                    entry.value.latitude,
+                                                    entry.value.longitude,
+                                                  ),
+                                                  width: 34,
+                                                  height: 34,
+                                                  child: CircleAvatar(
+                                                    radius: 16,
+                                                    backgroundColor:
+                                                        entry.key == 0
+                                                        ? Colors.green
+                                                        : (entry.key ==
+                                                                  concreteNodes
+                                                                          .length -
+                                                                      1
+                                                              ? Colors.red
+                                                              : Colors.blue),
+                                                    child: Text(
+                                                      '${entry.key + 1}',
+                                                      style: const TextStyle(
+                                                        color: Colors.white,
+                                                        fontWeight:
+                                                            FontWeight.bold,
+                                                        fontSize: 11,
+                                                      ),
+                                                    ),
+                                                  ),
+                                                ),
+                                              )
+                                              .toList(),
+                                        ),
+                                      ],
+                                    )
+                                  : const Center(
+                                      child: Text(
+                                        'Not enough geolocated nodes to draw path',
+                                      ),
+                                    ),
+                            ),
+                          ),
+                        ),
+                      ),
+                      const SizedBox(height: 12),
+                      Padding(
+                        padding: const EdgeInsets.symmetric(horizontal: 16),
+                        child: Text(
+                          'Route',
+                          style: Theme.of(context).textTheme.titleMedium,
+                        ),
+                      ),
+                      if (routeEntries.isEmpty)
+                        const Padding(
+                          padding: EdgeInsets.symmetric(
+                            horizontal: 16,
+                            vertical: 8,
+                          ),
+                          child: Text(
+                            'No named nodes could be matched for this trace.',
+                          ),
+                        ),
+                      ...routeEntries.asMap().entries.map(
+                        (entry) => ListTile(
+                          leading: CircleAvatar(
+                            radius: 14,
+                            backgroundColor: entry.key == 0
+                                ? Colors.green
+                                : (entry.key == routeEntries.length - 1
+                                      ? Colors.red
+                                      : Colors.blue),
+                            child: Text(
+                              '${entry.key + 1}',
+                              style: const TextStyle(
+                                color: Colors.white,
+                                fontWeight: FontWeight.bold,
+                                fontSize: 11,
+                              ),
+                            ),
+                          ),
+                          title: Text(entry.value.label),
+                          subtitle: Text(
+                            '${_routeRoleLabel(entry.key, routeEntries.length)}${entry.value.keyLabel == null ? '' : ' • ${entry.value.keyLabel}'}${entry.value.matchSummary == null ? '' : ' • ${entry.value.matchSummary}'}',
+                          ),
+                        ),
+                      ),
+                      const SizedBox(height: 12),
+                      Padding(
+                        padding: const EdgeInsets.symmetric(horizontal: 16),
+                        child: Text(
+                          'Relays (${relayNodes.length})',
+                          style: Theme.of(context).textTheme.titleMedium,
+                        ),
+                      ),
+                      if (relayNodes.isEmpty)
+                        const Padding(
+                          padding: EdgeInsets.symmetric(
+                            horizontal: 16,
+                            vertical: 8,
+                          ),
+                          child: Text(
+                            'No relay nodes could be matched for this contact.',
+                          ),
+                        ),
+                      ...relayNodes.map(
+                        (node) => ListTile(
+                          leading: const Icon(Icons.router),
+                          title: Text(node.name),
+                          subtitle: Text(
+                            '${node.publicKey.substring(0, math.min(12, node.publicKey.length))} • '
+                            '${node.latitude.toStringAsFixed(5)}, ${node.longitude.toStringAsFixed(5)}',
+                          ),
+                        ),
+                      ),
+                    ],
+                  ),
+                ),
+              ],
+            ),
+          );
+        },
+      ),
+    );
+  }
+
+  List<_RouteDisplayEntry> _displayRouteEntries(_ContactTraceResult trace) {
+    final entries = <_RouteDisplayEntry>[];
+    if (trace.sender.node != null) {
+      entries.add(_RouteDisplayEntry.fromResolved(trace.sender));
+    }
+    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,
+        );
+      }),
+    );
+    if (trace.recipient.node != null) {
+      entries.add(_RouteDisplayEntry.fromResolved(trace.recipient));
+    }
+    return entries;
+  }
+
+  String _routeRoleLabel(int index, int total) {
+    if (index == 0) return 'Sender';
+    if (index == total - 1) return 'Recipient';
+    return 'Relay';
+  }
+
+  String _prefixKeyLabel(String publicKey) =>
+      publicKey.substring(0, math.min(12, publicKey.length));
+
+  bool _isCompleteTrace(_ContactTraceResult trace) {
+    if (trace.sender.node == null || trace.recipient.node == null) {
+      return false;
+    }
+    if (trace.routeHashes.isEmpty) {
+      return true;
+    }
+    return trace.matchedRelayNodes.every((node) => node.node != null);
+  }
+
+  _ContactTraceResult _buildTraceResult({
+    required List<MeshMapNode> nodes,
+    required Set<String> localPublicKeys,
+    required List<int>? selfPublicKey,
+  }) {
+    final senderNode = TraceNodeResolver.resolveBest(
+      nodes: nodes,
+      localPublicKeys: localPublicKeys,
+      prefixHex: _toPrefixHex(selfPublicKey),
+    );
+    final recipientNode = TraceNodeResolver.resolveBest(
+      nodes: nodes,
+      localPublicKeys: localPublicKeys,
+      prefixHex: _toPrefixHex(widget.contact.publicKey),
+    );
+    final senderLatLng = senderNode.node == null
+        ? null
+        : LatLng(senderNode.node!.latitude, senderNode.node!.longitude);
+    final recipientLatLng = recipientNode.node == null
+        ? null
+        : LatLng(recipientNode.node!.latitude, recipientNode.node!.longitude);
+    final routeHashes =
+        widget.contact.routeHasPath && widget.contact.routeHopCount > 0
+        ? widget.contact.routeCanonicalText
+              .split(',')
+              .where((token) => token.isNotEmpty)
+              .map((token) => token.toLowerCase())
+              .toList()
+        : const <String>[];
+
+    final matchedRelayNodes = routeHashes
+        .map(
+          (hash) => TraceNodeResolver.resolveBest(
+            nodes: nodes,
+            localPublicKeys: localPublicKeys,
+            prefixHex: hash,
+            referenceA: senderLatLng,
+            referenceB: recipientLatLng,
+          ),
+        )
+        .toList();
+
+    return _ContactTraceResult(
+      sender: senderNode,
+      recipient: recipientNode,
+      routeHashes: routeHashes,
+      matchedRelayNodes: matchedRelayNodes,
+    );
+  }
+
+  String? _toPrefixHex(List<int>? key) {
+    if (key == null || key.isEmpty) return null;
+    final take = key.length < 6 ? key.length : 6;
+    return key
+        .take(take)
+        .map((b) => b.toRadixString(16).padLeft(2, '0'))
+        .join()
+        .toLowerCase();
+  }
+
+  List<MeshMapNode> _localNodesFromContacts(
+    ContactsProvider contactsProvider, {
+    required ConnectionProvider connectionProvider,
+  }) {
+    final nodes = contactsProvider.contactsWithLocation
+        .map((contact) {
+          final location = contact.displayLocation;
+          if (location == null) return null;
+          return MeshMapNode(
+            type: contact.type.index,
+            name: contact.displayName,
+            publicKey: contact.publicKeyHex.toLowerCase(),
+            latitude: location.latitude,
+            longitude: location.longitude,
+            updatedAtMs: contact.lastAdvert * 1000,
+          );
+        })
+        .whereType<MeshMapNode>()
+        .toList();
+
+    final selfNode = _selfNode(connectionProvider);
+    if (selfNode != null) {
+      nodes.add(selfNode);
+    }
+    return nodes;
+  }
+
+  MeshMapNode? _selfNode(ConnectionProvider connectionProvider) {
+    final publicKey = connectionProvider.deviceInfo.publicKey;
+    final advLat = connectionProvider.deviceInfo.advLat;
+    final advLon = connectionProvider.deviceInfo.advLon;
+    if (publicKey == null || advLat == null || advLon == null) {
+      return null;
+    }
+    if (advLat == 0 && advLon == 0) {
+      return null;
+    }
+
+    return MeshMapNode(
+      type: -1,
+      name: connectionProvider.deviceInfo.selfName?.trim().isNotEmpty == true
+          ? connectionProvider.deviceInfo.selfName!.trim()
+          : 'You',
+      publicKey: publicKey
+          .map((b) => b.toRadixString(16).padLeft(2, '0'))
+          .join()
+          .toLowerCase(),
+      latitude: advLat / 1e6,
+      longitude: advLon / 1e6,
+      updatedAtMs: DateTime.now().millisecondsSinceEpoch,
+    );
+  }
+
+  List<MeshMapNode> _mergeNodes(
+    List<MeshMapNode> preferred,
+    List<MeshMapNode> fallback,
+  ) {
+    final merged = <String, MeshMapNode>{};
+    for (final node in fallback) {
+      merged[node.publicKey] = node;
+    }
+    for (final node in preferred) {
+      merged[node.publicKey] = node;
+    }
+    return merged.values.toList();
+  }
+}
+
+class _ContactTraceResult {
+  final ResolvedTraceNode sender;
+  final ResolvedTraceNode recipient;
+  final List<String> routeHashes;
+  final List<ResolvedTraceNode> matchedRelayNodes;
+
+  const _ContactTraceResult({
+    required this.sender,
+    required this.recipient,
+    required this.routeHashes,
+    required this.matchedRelayNodes,
+  });
+}
+
+class _RouteDisplayEntry {
+  final ResolvedTraceNode resolved;
+  final String label;
+  final String? keyLabel;
+  final String? matchSummary;
+
+  const _RouteDisplayEntry({
+    required this.resolved,
+    required this.label,
+    required this.keyLabel,
+    required this.matchSummary,
+  });
+
+  MeshMapNode? get node => resolved.node;
+
+  factory _RouteDisplayEntry.fromResolved(ResolvedTraceNode resolved) {
+    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,
+    );
+  }
+}

lib/widgets/messages/message_bubble.dart

@@ -104,6 +104,7 @@ class _MessageBubbleState extends State<MessageBubble> {
 
     final textColor =
         baseBodyStyle?.color ?? Theme.of(context).colorScheme.onSurface;
+    final mentionFontSize = (baseBodyStyle?.fontSize ?? 14) - 1;
     final backgroundColor = Theme.of(
       context,
     ).colorScheme.primary.withValues(alpha: 0.12);
@@ -130,8 +131,8 @@ class _MessageBubbleState extends State<MessageBubble> {
           WidgetSpan(
             alignment: PlaceholderAlignment.middle,
             child: Container(
-              margin: const EdgeInsets.symmetric(horizontal: 1, vertical: 1),
-              padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 3),
+              margin: const EdgeInsets.symmetric(horizontal: 1),
+              padding: const EdgeInsets.symmetric(horizontal: 6, vertical: 1),
               decoration: BoxDecoration(
                 color: backgroundColor,
                 borderRadius: BorderRadius.circular(999),
@@ -141,8 +142,9 @@ class _MessageBubbleState extends State<MessageBubble> {
                 '@$mentionName',
                 style: baseBodyStyle?.copyWith(
                   color: textColor,
-                  fontWeight: FontWeight.w700,
-                  height: 1.1,
+                  fontSize: mentionFontSize,
+                  fontWeight: FontWeight.w600,
+                  height: 1.0,
                 ),
               ),
             ),
@@ -1788,6 +1790,7 @@ class _MessageBubbleState extends State<MessageBubble> {
         receptionDetails?.rssiDbm ??
         matchedRxLog?.logRxDataInfo?.rssiDbm ??
         message.lastEchoRssiDbm;
+    final routeMetadata = messagesProvider.getMessageRouteMetadata(message.id);
 
     // Look up contact information for rich display name
     final contactsProvider = context.read<ContactsProvider>();
@@ -2071,9 +2074,11 @@ class _MessageBubbleState extends State<MessageBubble> {
                         Expanded(
                           child: Text(
                             displayName,
-                            style: Theme.of(context).textTheme.labelMedium
+                            style: Theme.of(context).textTheme.bodySmall
                                 ?.copyWith(
+                                  fontSize: 12,
                                   fontWeight: FontWeight.bold,
+                                  height: 1.1,
                                   color: isOwnMessage
                                       ? Theme.of(context).colorScheme.primary
                                       : null,
@@ -2515,7 +2520,7 @@ class _MessageBubbleState extends State<MessageBubble> {
                                   switch (recipient.deliveryStatus) {
                                     case MessageDeliveryStatus.delivered:
                                       statusColor = Colors.green;
-                                      statusIcon = Icons.check_circle;
+                                      statusIcon = Icons.done_all;
                                       statusText =
                                           recipient.roundTripTimeMs != null
                                           ? '${recipient.roundTripTimeMs}ms'
@@ -2523,6 +2528,15 @@ class _MessageBubbleState extends State<MessageBubble> {
                                               context,
                                             )!.delivered;
                                       break;
+                                    case MessageDeliveryStatus.sent:
+                                      statusColor = Theme.of(
+                                        context,
+                                      ).colorScheme.onSurfaceVariant;
+                                      statusIcon = Icons.done;
+                                      statusText = AppLocalizations.of(
+                                        context,
+                                      )!.sent;
+                                      break;
                                     case MessageDeliveryStatus.failed:
                                       statusColor = Colors.red;
                                       statusIcon = Icons.cancel;
@@ -2531,7 +2545,6 @@ class _MessageBubbleState extends State<MessageBubble> {
                                       )!.failed;
                                       break;
                                     case MessageDeliveryStatus.sending:
-                                    case MessageDeliveryStatus.sent:
                                     default:
                                       statusColor = Colors.orange;
                                       statusIcon = Icons.schedule;
@@ -2726,6 +2739,7 @@ class _MessageBubbleState extends State<MessageBubble> {
           context,
           message: message,
           isSarMarker: isSarMarker,
+          routeMetadata: routeMetadata,
         ),
       ],
     );

lib/widgets/messages/message_bubble_header.dart

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

lib/widgets/messages/message_bubble_signal.dart

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

lib/widgets/messages/message_trace_sheet.dart

@@ -10,9 +10,11 @@ import '../../models/ble_packet_log.dart';
 import '../../models/message.dart';
 import '../../providers/connection_provider.dart';
 import '../../providers/contacts_provider.dart';
+import '../../providers/messages_provider.dart';
 import '../../services/mesh_map_nodes_service.dart';
 import '../../services/route_hash_preferences.dart';
 import '../../utils/log_rx_route_decoder.dart';
+import '../../utils/trace_node_resolver.dart';
 
 class MessageTraceSheet extends StatefulWidget {
   final Message message;
@@ -35,11 +37,17 @@ class _MessageTraceSheetState extends State<MessageTraceSheet> {
   Future<_TraceResult> _loadTrace() async {
     final connectionProvider = context.read<ConnectionProvider>();
     final contactsProvider = context.read<ContactsProvider>();
+    final messagesProvider = context.read<MessagesProvider>();
     final preferredHashSize = await RouteHashPreferences.getHashSize();
-    final packetPath = _extractPathFromPacketLogs(
-      logs: connectionProvider.bleService.packetLogs,
-      message: widget.message,
-    );
+    final storedPath = messagesProvider
+        .getMessageReceptionDetails(widget.message.id)
+        ?.pathBytes;
+    final packetPath = (storedPath != null && storedPath.isNotEmpty)
+        ? storedPath
+        : _extractPathFromPacketLogs(
+            logs: connectionProvider.bleService.packetLogs,
+            message: widget.message,
+          );
 
     final senderPrefix = _toPrefixHex(widget.message.senderPublicKeyPrefix);
     final recipientPrefix = widget.message.recipientPublicKey != null
@@ -47,8 +55,10 @@ class _MessageTraceSheetState extends State<MessageTraceSheet> {
         : _toPrefixHex(connectionProvider.deviceInfo.publicKey);
 
     final localNodes = _localNodesFromContacts(contactsProvider);
+    final localPublicKeys = localNodes.map((node) => node.publicKey).toSet();
     var trace = _buildTraceResult(
       nodes: localNodes,
+      localPublicKeys: localPublicKeys,
       packetPath: packetPath,
       preferredHashSize: preferredHashSize,
       senderPrefix: senderPrefix,
@@ -72,6 +82,7 @@ class _MessageTraceSheetState extends State<MessageTraceSheet> {
     );
     trace = _buildTraceResult(
       nodes: _mergeNodes(localNodes, remoteNodes),
+      localPublicKeys: localPublicKeys,
       packetPath: packetPath,
       preferredHashSize: preferredHashSize,
       senderPrefix: senderPrefix,
@@ -107,8 +118,8 @@ class _MessageTraceSheetState extends State<MessageTraceSheet> {
           final trace = snapshot.data!;
           final routeEntries = _displayRouteEntries(trace);
           final concretePathNodes = routeEntries
-              .where((entry) => entry.node != null)
-              .map((entry) => entry.node!)
+              .where((entry) => entry.resolved.node != null)
+              .map((entry) => entry.resolved.node!)
               .toList();
           final mapPoints = concretePathNodes
               .map((n) => LatLng(n.latitude, n.longitude))
@@ -282,7 +293,7 @@ class _MessageTraceSheetState extends State<MessageTraceSheet> {
                           ),
                           title: Text(entry.value.label),
                           subtitle: Text(
-                            '${_routeRoleLabel(entry.key, routeEntries.length)}${entry.value.keyLabel == null ? '' : ' • ${entry.value.keyLabel}'}',
+                            '${_routeRoleLabel(entry.key, routeEntries.length)}${entry.value.keyLabel == null ? '' : ' • ${entry.value.keyLabel}'}${entry.value.matchSummary == null ? '' : ' • ${entry.value.matchSummary}'}',
                           ),
                         ),
                       ),
@@ -326,7 +337,10 @@ class _MessageTraceSheetState extends State<MessageTraceSheet> {
   }
 
   List<MeshMapNode> _relayNodes(_TraceResult trace) {
-    final concrete = trace.matchedPathNodes.whereType<MeshMapNode>().toList();
+    final concrete = trace.matchedPathNodes
+        .map((entry) => entry.node)
+        .whereType<MeshMapNode>()
+        .toList();
     if (concrete.isEmpty) return const [];
 
     if (trace.mode == TraceMode.packetPath) {
@@ -339,13 +353,17 @@ class _MessageTraceSheetState extends State<MessageTraceSheet> {
   }
 
   List<_RouteDisplayEntry> _displayRouteEntries(_TraceResult trace) {
-    final pathNodes = trace.matchedPathNodes.whereType<MeshMapNode>().toList();
+    final pathNodes = trace.matchedPathNodes
+        .map((entry) => entry.node)
+        .whereType<MeshMapNode>()
+        .toList();
     if (pathNodes.isEmpty) {
       return [
-        if (trace.sender != null) _RouteDisplayEntry.fromNode(trace.sender!),
-        if (trace.recipient != null &&
-            trace.recipient!.publicKey != trace.sender?.publicKey)
-          _RouteDisplayEntry.fromNode(trace.recipient!),
+        if (trace.sender.node != null)
+          _RouteDisplayEntry.fromResolved(trace.sender),
+        if (trace.recipient.node != null &&
+            trace.recipient.node!.publicKey != trace.sender.node?.publicKey)
+          _RouteDisplayEntry.fromResolved(trace.recipient),
       ];
     }
 
@@ -353,29 +371,34 @@ class _MessageTraceSheetState extends State<MessageTraceSheet> {
       final entries = trace.matchedPathNodes.asMap().entries.map((entry) {
         final hashHex = trace.pathHashes[entry.key].toUpperCase();
         return _RouteDisplayEntry(
-          node: entry.value,
-          label: entry.value?.name ?? 'Unknown',
-          keyLabel: entry.value != null
-              ? _prefixKeyLabel(entry.value!.publicKey)
+          resolved: entry.value,
+          label: entry.value.node?.name ?? 'Unknown',
+          keyLabel: entry.value.node != null
+              ? _prefixKeyLabel(entry.value.node!.publicKey)
               : hashHex,
+          matchSummary: entry.value.matchSummary,
         );
       }).toList();
       final lastKey = pathNodes.last.publicKey;
       return [
         ...entries,
-        if (trace.recipient != null && trace.recipient!.publicKey != lastKey)
-          _RouteDisplayEntry.fromNode(trace.recipient!),
+        if (trace.recipient.node != null &&
+            trace.recipient.node!.publicKey != lastKey)
+          _RouteDisplayEntry.fromResolved(trace.recipient),
       ];
     }
 
     final firstKey = pathNodes.first.publicKey;
     final lastKey = pathNodes.last.publicKey;
     return [
-      if (trace.sender != null && trace.sender!.publicKey != firstKey)
-        _RouteDisplayEntry.fromNode(trace.sender!),
-      ...pathNodes.map(_RouteDisplayEntry.fromNode),
-      if (trace.recipient != null && trace.recipient!.publicKey != lastKey)
-        _RouteDisplayEntry.fromNode(trace.recipient!),
+      if (trace.sender.node != null && trace.sender.node!.publicKey != firstKey)
+        _RouteDisplayEntry.fromResolved(trace.sender),
+      ...trace.matchedPathNodes
+          .where((entry) => entry.node != null)
+          .map(_RouteDisplayEntry.fromResolved),
+      if (trace.recipient.node != null &&
+          trace.recipient.node!.publicKey != lastKey)
+        _RouteDisplayEntry.fromResolved(trace.recipient),
     ];
   }
 
@@ -398,14 +421,6 @@ class _MessageTraceSheetState extends State<MessageTraceSheet> {
         .toLowerCase();
   }
 
-  MeshMapNode? _bestNodeForPrefix(List<MeshMapNode> nodes, String? prefixHex) {
-    if (prefixHex == null || prefixHex.isEmpty) return null;
-    final matches =
-        nodes.where((n) => n.publicKey.startsWith(prefixHex)).toList()
-          ..sort((a, b) => b.updatedAtMs.compareTo(a.updatedAtMs));
-    return matches.isEmpty ? null : matches.first;
-  }
-
   List<MeshMapNode> _localNodesFromContacts(ContactsProvider contactsProvider) {
     return contactsProvider.contactsWithLocation
         .map((contact) {
@@ -440,13 +455,28 @@ class _MessageTraceSheetState extends State<MessageTraceSheet> {
 
   _TraceResult _buildTraceResult({
     required List<MeshMapNode> nodes,
+    required Set<String> localPublicKeys,
     required List<int>? packetPath,
     required int preferredHashSize,
     required String? senderPrefix,
     required String? recipientPrefix,
   }) {
-    final senderNode = _bestNodeForPrefix(nodes, senderPrefix);
-    final recipientNode = _bestNodeForPrefix(nodes, recipientPrefix);
+    final senderNode = TraceNodeResolver.resolveBest(
+      nodes: nodes,
+      localPublicKeys: localPublicKeys,
+      prefixHex: senderPrefix,
+    );
+    final recipientNode = TraceNodeResolver.resolveBest(
+      nodes: nodes,
+      localPublicKeys: localPublicKeys,
+      prefixHex: recipientPrefix,
+    );
+    final senderLatLng = senderNode.node == null
+        ? null
+        : LatLng(senderNode.node!.latitude, senderNode.node!.longitude);
+    final recipientLatLng = recipientNode.node == null
+        ? null
+        : LatLng(recipientNode.node!.latitude, recipientNode.node!.longitude);
 
     if (packetPath != null && packetPath.isNotEmpty) {
       final hashSize = LogRxRouteDecoder.inferHashSize(
@@ -456,12 +486,15 @@ class _MessageTraceSheetState extends State<MessageTraceSheet> {
       final hopHashes = LogRxRouteDecoder.splitHopHashes(
         packetPath,
         hashSize: hashSize,
-      );
+      ).reversed.toList();
       final matched = _matchNodesFromPathHashes(
         nodes: nodes,
+        localPublicKeys: localPublicKeys,
         pathHashes: hopHashes,
         senderPrefix: senderPrefix,
         recipientPrefix: recipientPrefix,
+        senderLatLng: senderLatLng,
+        recipientLatLng: recipientLatLng,
       );
       return _TraceResult(
         mode: TraceMode.packetPath,
@@ -474,14 +507,20 @@ class _MessageTraceSheetState extends State<MessageTraceSheet> {
 
     final inferred = _inferRelaysFromHopCount(
       nodes: nodes,
-      sender: senderNode,
-      recipient: recipientNode,
+      sender: senderNode.node,
+      recipient: recipientNode.node,
       relayCount: math.max(0, widget.message.pathLen),
     );
-    final matchedPathNodes = <MeshMapNode?>[
-      if (senderNode != null) senderNode,
-      ...inferred,
-      if (recipientNode != null) recipientNode,
+    final matchedPathNodes = <ResolvedTraceNode>[
+      if (senderNode.node != null) senderNode,
+      ...inferred.map(
+        (node) => ResolvedTraceNode(
+          node: node,
+          matchCount: 1,
+          usedOnlineFallback: false,
+        ),
+      ),
+      if (recipientNode.node != null) recipientNode,
     ];
 
     return _TraceResult(
@@ -494,16 +533,17 @@ class _MessageTraceSheetState extends State<MessageTraceSheet> {
   }
 
   bool _isCompleteTrace(_TraceResult trace, {required int expectedRelayCount}) {
-    if (trace.sender == null || trace.recipient == null) {
+    if (trace.sender.node == null || trace.recipient.node == null) {
       return false;
     }
 
     if (trace.mode == TraceMode.packetPath) {
       return trace.matchedPathNodes.length == trace.pathHashes.length &&
-          trace.matchedPathNodes.every((node) => node != null);
+          trace.matchedPathNodes.every((node) => node.node != null);
     }
 
     final concreteCount = trace.matchedPathNodes
+        .map((entry) => entry.node)
         .whereType<MeshMapNode>()
         .length;
     return concreteCount >= expectedRelayCount + 2;
@@ -544,33 +584,30 @@ class _MessageTraceSheetState extends State<MessageTraceSheet> {
     return decoded.pathBytes;
   }
 
-  List<MeshMapNode?> _matchNodesFromPathHashes({
+  List<ResolvedTraceNode> _matchNodesFromPathHashes({
     required List<MeshMapNode> nodes,
+    required Set<String> localPublicKeys,
     required List<String> pathHashes,
     required String? senderPrefix,
     required String? recipientPrefix,
+    required LatLng? senderLatLng,
+    required LatLng? recipientLatLng,
   }) {
-    final result = <MeshMapNode?>[];
+    final result = <ResolvedTraceNode>[];
     for (var i = 0; i < pathHashes.length; i++) {
       final hashHex = pathHashes[i].toLowerCase();
-      final candidates = nodes
-          .where((n) => n.publicKey.startsWith(hashHex))
-          .toList();
-      if (candidates.isEmpty) {
-        result.add(null);
-        continue;
-      }
-
-      List<MeshMapNode> filtered = candidates;
-      if (i == 0 && senderPrefix != null) {
-        final senderMatches = filtered
-            .where((n) => n.publicKey.startsWith(senderPrefix))
-            .toList();
-        if (senderMatches.isNotEmpty) filtered = senderMatches;
-      }
-
-      filtered.sort((a, b) => b.updatedAtMs.compareTo(a.updatedAtMs));
-      result.add(filtered.first);
+      result.add(
+        TraceNodeResolver.resolveBest(
+          nodes: nodes,
+          localPublicKeys: localPublicKeys,
+          prefixHex: hashHex,
+          preferredPrefix: i == 0
+              ? senderPrefix
+              : (i == pathHashes.length - 1 ? recipientPrefix : null),
+          referenceA: senderLatLng,
+          referenceB: recipientLatLng,
+        ),
+      );
     }
     return result;
   }
@@ -639,10 +676,10 @@ enum TraceMode { packetPath, hopCountInference }
 
 class _TraceResult {
   final TraceMode mode;
-  final MeshMapNode? sender;
-  final MeshMapNode? recipient;
+  final ResolvedTraceNode sender;
+  final ResolvedTraceNode recipient;
   final List<String> pathHashes;
-  final List<MeshMapNode?> matchedPathNodes;
+  final List<ResolvedTraceNode> matchedPathNodes;
 
   const _TraceResult({
     required this.mode,
@@ -654,24 +691,30 @@ class _TraceResult {
 }
 
 class _RouteDisplayEntry {
-  final MeshMapNode? node;
+  final ResolvedTraceNode resolved;
   final String label;
   final String? keyLabel;
+  final String? matchSummary;
 
   const _RouteDisplayEntry({
-    required this.node,
+    required this.resolved,
     required this.label,
     required this.keyLabel,
+    required this.matchSummary,
   });
 
-  factory _RouteDisplayEntry.fromNode(MeshMapNode node) {
+  MeshMapNode? get node => resolved.node;
+
+  factory _RouteDisplayEntry.fromResolved(ResolvedTraceNode resolved) {
+    final node = resolved.node!;
     return _RouteDisplayEntry(
-      node: node,
+      resolved: resolved,
       label: node.name,
       keyLabel: node.publicKey.substring(
         0,
         math.min(12, node.publicKey.length),
       ),
+      matchSummary: resolved.matchSummary,
     );
   }
 }

pubspec.yaml

@@ -16,7 +16,7 @@ publish_to: 'none' # Remove this line if you wish to publish to pub.dev
 # https://developer.apple.com/library/archive/documentation/General/Reference/InfoPlistKeyReference/Articles/CoreFoundationKeys.html
 # In Windows, build-name is used as the major, minor, and patch parts
 # of the product and file versions while build-number is used as the build suffix.
-version: 2026.0311.1+26
+version: 2026.0312.1+27
 
 environment:
   sdk: ^3.9.2

test/providers/contacts_provider_test.dart

@@ -1,5 +1,6 @@
 import 'dart:typed_data';
 
+import 'package:geolocator/geolocator.dart';
 import 'package:flutter_test/flutter_test.dart';
 import 'package:latlong2/latlong.dart';
 import 'package:meshcore_sar_app/models/contact.dart';
@@ -457,6 +458,24 @@ void main() {
       expect(updated.routeCanonicalText, 'AABB,CCDD');
     });
 
+    test('stores inferred fallback gps when route is set locally', () {
+      final route = ContactRouteCodec.parse('AABB,CCDD');
+      const fallback = LatLng(46.1001, 14.5002);
+
+      provider.setContactRouteLocal(
+        publicKey,
+        signedEncodedPathLen: route.signedEncodedPathLen,
+        paddedPathBytes: route.paddedPathBytes,
+        inferredFallbackLocation: fallback,
+      );
+
+      final updated = provider.findContactByKey(publicKey)!;
+      expect(updated.displayLocation, isNotNull);
+      expect(updated.displayLocation!.latitude, closeTo(46.1001, 0.000001));
+      expect(updated.displayLocation!.longitude, closeTo(14.5002, 0.000001));
+      expect(updated.advertHistory, isNotEmpty);
+    });
+
     test('resetContactRouteLocal clears route state', () {
       final route = ContactRouteCodec.parse('AA,BB,CC');
       provider.setContactRouteLocal(
@@ -471,6 +490,153 @@ void main() {
       expect(updated.routeHasPath, isFalse);
       expect(updated.routeSummary, 'Flood/Unknown');
     });
+
+    test('retains existing route when contact refresh omits path', () {
+      final retainedRoute = ContactRouteCodec.parse('AABB,CCDD');
+      provider.setContactRouteLocal(
+        publicKey,
+        signedEncodedPathLen: retainedRoute.signedEncodedPathLen,
+        paddedPathBytes: retainedRoute.paddedPathBytes,
+      );
+
+      provider.addOrUpdateContact(
+        createContact(
+          key: publicKey,
+          type: ContactType.chat,
+          name: 'Routey',
+        ).copyWith(outPathLen: -1, outPath: Uint8List(0)),
+      );
+
+      final updated = provider.findContactByKey(publicKey)!;
+      expect(updated.routeHasPath, isTrue);
+      expect(updated.routeCanonicalText, 'AABB,CCDD');
+    });
+
+    test('applies retained pending advert route when contact is resolved', () {
+      final pendingKey = createPublicKey(96);
+      final retainedRoute = ContactRouteCodec.parse('1122,3344');
+
+      provider.retainReceivedRoute(
+        pendingKey,
+        signedEncodedPathLen: retainedRoute.signedEncodedPathLen,
+        paddedPathBytes: retainedRoute.paddedPathBytes,
+      );
+      provider.addPendingAdvert(pendingKey);
+
+      provider.addOrUpdateContact(
+        createContact(
+          key: pendingKey,
+          type: ContactType.chat,
+          name: 'Pending Routey',
+        ).copyWith(outPathLen: -1, outPath: Uint8List(0)),
+      );
+
+      final updated = provider.findContactByKey(pendingKey)!;
+      expect(updated.routeHasPath, isTrue);
+      expect(updated.routeCanonicalText, '1122,3344');
+      expect(
+        provider.pendingAdverts.where(
+          (advert) => advert.publicKeyHex == updated.publicKeyHex,
+        ),
+        isEmpty,
+      );
+    });
+
+    test('infers a fallback location 100m from last-hop repeater', () {
+      final repeaterKey = Uint8List.fromList([
+        0xCC,
+        0xDD,
+        0x10,
+        0x11,
+        0x12,
+        0x13,
+        ...List<int>.generate(26, (index) => index + 20),
+      ]);
+      provider.addOrUpdateContact(
+        createContact(
+          key: repeaterKey,
+          type: ContactType.repeater,
+          name: 'Relay Alpha',
+        ),
+      );
+
+      final targetKey = createPublicKey(120);
+      final route = ContactRouteCodec.parse('AABB,CCDD');
+      provider.addOrUpdateContact(
+        Contact(
+          publicKey: targetKey,
+          type: ContactType.chat,
+          flags: 0,
+          outPathLen: route.signedEncodedPathLen,
+          outPath: route.paddedPathBytes,
+          advName: 'No GPS',
+          lastAdvert: DateTime.now().millisecondsSinceEpoch ~/ 1000,
+          advLat: 0,
+          advLon: 0,
+          lastMod: DateTime.now().millisecondsSinceEpoch ~/ 1000,
+        ),
+      );
+
+      final updated = provider.findContactByKey(targetKey)!;
+      final inferred = updated.displayLocation;
+      final repeater = provider.findContactByKey(repeaterKey)!;
+      final repeaterLocation = repeater.displayLocation;
+
+      expect(inferred, isNotNull);
+      expect(repeaterLocation, isNotNull);
+
+      final distanceMeters = Geolocator.distanceBetween(
+        repeaterLocation!.latitude,
+        repeaterLocation.longitude,
+        inferred!.latitude,
+        inferred.longitude,
+      );
+      expect(distanceMeters, closeTo(100.0, 8.0));
+    });
+
+    test(
+      'does not infer a fallback location when the contact advertises one',
+      () {
+        final repeaterKey = Uint8List.fromList([
+          0xCC,
+          0xDD,
+          0x10,
+          0x11,
+          0x12,
+          0x13,
+          ...List<int>.generate(26, (index) => index + 20),
+        ]);
+        provider.addOrUpdateContact(
+          createContact(
+            key: repeaterKey,
+            type: ContactType.repeater,
+            name: 'Relay Alpha',
+          ),
+        );
+
+        final targetKey = createPublicKey(121);
+        final route = ContactRouteCodec.parse('AABB,CCDD');
+        provider.addOrUpdateContact(
+          Contact(
+            publicKey: targetKey,
+            type: ContactType.chat,
+            flags: 0,
+            outPathLen: route.signedEncodedPathLen,
+            outPath: route.paddedPathBytes,
+            advName: 'Has Advert',
+            lastAdvert: DateTime.now().millisecondsSinceEpoch ~/ 1000,
+            advLat: (45.1234 * 1e6).toInt(),
+            advLon: (13.8765 * 1e6).toInt(),
+            lastMod: DateTime.now().millisecondsSinceEpoch ~/ 1000,
+          ),
+        );
+
+        final updated = provider.findContactByKey(targetKey)!;
+        expect(updated.displayLocation, isNotNull);
+        expect(updated.displayLocation!.latitude, closeTo(45.1234, 0.000001));
+        expect(updated.displayLocation!.longitude, closeTo(13.8765, 0.000001));
+      },
+    );
   });
 
   group('ContactsProvider.updateFastGps', () {
@@ -533,4 +699,39 @@ void main() {
       expect(after.advLon, equals(before.advLon));
     });
   });
+
+  group('ContactsProvider saved contact groups', () {
+    late ContactsProvider provider;
+
+    setUp(() {
+      SharedPreferences.setMockInitialValues({});
+      provider = ContactsProvider();
+    });
+
+    test('adds and removes saved groups by filter', () async {
+      expect(provider.savedContactGroups, isEmpty);
+
+      await provider.addSavedGroupForFilter('teamMembers', 'alpha');
+
+      expect(provider.savedContactGroups, hasLength(1));
+      expect(provider.hasSavedGroupForFilter('teamMembers', 'alpha'), isTrue);
+      expect(provider.hasSavedGroupForFilter('teamMembers', 'ALPHA'), isTrue);
+
+      await provider.removeSavedGroupForFilter('teamMembers', 'ALPHA');
+
+      expect(provider.savedContactGroups, isEmpty);
+      expect(provider.hasSavedGroupForFilter('teamMembers', 'alpha'), isFalse);
+    });
+
+    test('loads persisted saved groups during initialization', () async {
+      await provider.addSavedGroupForFilter('rooms', 'ops');
+
+      final restored = ContactsProvider();
+      await restored.initializeEarly();
+
+      expect(restored.savedGroupsForSection('rooms'), hasLength(1));
+      expect(restored.savedGroupsForSection('rooms').first.query, 'ops');
+      expect(restored.savedGroupsForSection('rooms').first.label, 'ops');
+    });
+  });
 }

test/screens/live_traffic_screen_test.dart

@@ -0,0 +1,179 @@
+import 'dart:typed_data';
+
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:meshcore_sar_app/models/ble_packet_log.dart';
+import 'package:meshcore_sar_app/screens/live_traffic_screen.dart';
+
+BlePacketLog _log({
+  required DateTime timestamp,
+  required PacketDirection direction,
+  required List<int> rawData,
+  int? responseCode,
+  double? snrDb,
+  int? rssiDbm,
+}) {
+  return BlePacketLog(
+    timestamp: timestamp,
+    rawData: Uint8List.fromList(rawData),
+    direction: direction,
+    responseCode: responseCode ?? (rawData.isEmpty ? null : rawData.first),
+    logRxDataInfo: snrDb == null && rssiDbm == null
+        ? null
+        : LogRxDataInfo(
+            entropy: 0,
+            isLikelyEncrypted: false,
+            snrDb: snrDb,
+            rssiDbm: rssiDbm,
+          ),
+  );
+}
+
+List<int> _multiHopRaw({
+  required List<int> hops,
+  int payloadType = 0x01,
+  int hashSize = 2,
+}) {
+  final hopCount = hops.length ~/ hashSize;
+  final pathDescriptor = ((hashSize - 1) << 6) | hopCount;
+  return [
+    0x88,
+    0x00,
+    0x00,
+    payloadType << 2,
+    0x00,
+    0x00,
+    0x00,
+    0x00,
+    pathDescriptor,
+    ...hops,
+  ];
+}
+
+void main() {
+  testWidgets('shows empty state before traffic arrives', (tester) async {
+    final logs = <BlePacketLog>[];
+    final refresh = ValueNotifier<int>(0);
+    DateTime now = DateTime(2026, 3, 12, 12, 0, 0);
+
+    await tester.pumpWidget(
+      MaterialApp(
+        home: LiveTrafficScreen(
+          logReader: () => logs,
+          refreshListenable: refresh,
+          now: () => now,
+        ),
+      ),
+    );
+
+    expect(find.text('No live traffic yet'), findsOneWidget);
+    expect(find.text('Quiet'), findsOneWidget);
+  });
+
+  testWidgets('updates summary and stream for incoming live traffic', (
+    tester,
+  ) async {
+    final logs = <BlePacketLog>[];
+    final refresh = ValueNotifier<int>(0);
+    DateTime now = DateTime(2026, 3, 12, 12, 0, 0);
+
+    await tester.pumpWidget(
+      MaterialApp(
+        home: LiveTrafficScreen(
+          logReader: () => logs,
+          rxCountReader: () => 7,
+          refreshListenable: refresh,
+          now: () => now,
+        ),
+      ),
+    );
+
+    logs.addAll([
+      _log(
+        timestamp: now.subtract(const Duration(seconds: 10)),
+        direction: PacketDirection.rx,
+        rawData: _multiHopRaw(hops: [0xC0, 0x10, 0x63, 0x01, 0x68, 0xD9]),
+        responseCode: 0x88,
+        snrDb: 13.5,
+        rssiDbm: -84,
+      ),
+      _log(
+        timestamp: now.subtract(const Duration(seconds: 3)),
+        direction: PacketDirection.tx,
+        rawData: [0x05, 0x01, 0x02],
+        responseCode: 0x88,
+      ),
+      _log(
+        timestamp: now.subtract(const Duration(seconds: 2)),
+        direction: PacketDirection.rx,
+        rawData: [0x05, 0x01, 0x02],
+        responseCode: 0x05,
+      ),
+    ]);
+    refresh.value += 1;
+    await tester.pump();
+
+    expect(find.text('1 pkt/min'), findsOneWidget);
+    expect(find.text('Device total 7'), findsOneWidget);
+    expect(find.textContaining('RESP'), findsOneWidget);
+    expect(find.text('MULTI-HOP'), findsOneWidget);
+    expect(find.textContaining('RSSI -84 dBm'), findsOneWidget);
+  });
+
+  testWidgets('clear live view only resets transient screen state', (
+    tester,
+  ) async {
+    final logs = <BlePacketLog>[];
+    final refresh = ValueNotifier<int>(0);
+    DateTime now = DateTime(2026, 3, 12, 12, 0, 0);
+
+    logs.add(
+      _log(
+        timestamp: now.subtract(const Duration(seconds: 4)),
+        direction: PacketDirection.rx,
+        rawData: _multiHopRaw(hops: [0xC0, 0x10, 0x63, 0x01]),
+        responseCode: 0x88,
+      ),
+    );
+
+    await tester.pumpWidget(
+      MaterialApp(
+        home: LiveTrafficScreen(
+          logReader: () => logs,
+          refreshListenable: refresh,
+          now: () => now,
+        ),
+      ),
+    );
+
+    expect(find.text('MULTI-HOP'), findsOneWidget);
+
+    await tester.tap(find.byTooltip('Clear live view'));
+    await tester.pump();
+
+    expect(find.text('No live traffic yet'), findsOneWidget);
+
+    now = now.add(const Duration(seconds: 2));
+    logs.add(
+      _log(
+        timestamp: now,
+        direction: PacketDirection.tx,
+        rawData: [0x03, 0x04],
+        responseCode: 0x88,
+      ),
+    );
+    logs.add(
+      _log(
+        timestamp: now,
+        direction: PacketDirection.rx,
+        rawData: [0x88, 0x00, 0x00],
+        responseCode: 0x88,
+      ),
+    );
+    refresh.value += 1;
+    await tester.pump();
+
+    expect(find.text('No live traffic yet'), findsNothing);
+    expect(find.textContaining('3 bytes'), findsOneWidget);
+  });
+}

test/services/contact_route_resolver_test.dart

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

test/services/live_traffic_summary_test.dart

@@ -0,0 +1,147 @@
+import 'dart:typed_data';
+
+import 'package:flutter_test/flutter_test.dart';
+import 'package:meshcore_sar_app/models/ble_packet_log.dart';
+import 'package:meshcore_sar_app/services/live_traffic_summary.dart';
+
+BlePacketLog _log({
+  required DateTime timestamp,
+  required PacketDirection direction,
+  required List<int> rawData,
+  int? responseCode,
+  double? snrDb,
+  int? rssiDbm,
+}) {
+  return BlePacketLog(
+    timestamp: timestamp,
+    rawData: Uint8List.fromList(rawData),
+    direction: direction,
+    responseCode: responseCode ?? (rawData.isEmpty ? null : rawData.first),
+    logRxDataInfo: snrDb == null && rssiDbm == null
+        ? null
+        : LogRxDataInfo(
+            entropy: 0,
+            isLikelyEncrypted: false,
+            snrDb: snrDb,
+            rssiDbm: rssiDbm,
+          ),
+  );
+}
+
+List<int> _multiHopRaw({
+  required List<int> hops,
+  int payloadType = 0x01,
+  int hashSize = 2,
+}) {
+  final hopCount = hops.length ~/ hashSize;
+  final pathDescriptor = ((hashSize - 1) << 6) | hopCount;
+  return [
+    0x88,
+    0x00,
+    0x00,
+    payloadType << 2,
+    0x00,
+    0x00,
+    0x00,
+    0x00,
+    pathDescriptor,
+    ...hops,
+  ];
+}
+
+void main() {
+  group('LiveTrafficSummary', () {
+    test('uses only the rolling 60-second window', () {
+      final now = DateTime(2026, 3, 12, 12, 0, 0);
+      final snapshot = LiveTrafficSummary.fromLogs([
+        _log(
+          timestamp: now.subtract(const Duration(seconds: 61)),
+          direction: PacketDirection.rx,
+          rawData: [0x88, 0x00, 0x00],
+          responseCode: 0x88,
+        ),
+        _log(
+          timestamp: now.subtract(const Duration(seconds: 20)),
+          direction: PacketDirection.rx,
+          rawData: [0x88, 0x00, 0x00],
+          responseCode: 0x88,
+        ),
+        _log(
+          timestamp: now.subtract(const Duration(seconds: 10)),
+          direction: PacketDirection.tx,
+          rawData: [0x01, 0x02],
+          responseCode: 0x88,
+        ),
+        _log(
+          timestamp: now.subtract(const Duration(seconds: 5)),
+          direction: PacketDirection.rx,
+          rawData: [0x01, 0x02],
+          responseCode: 0x01,
+        ),
+      ], now: now);
+
+      expect(snapshot.totalCount, 1);
+      expect(snapshot.rxCount, 1);
+      expect(snapshot.txCount, 0);
+      expect(snapshot.packetsPerMinute, 1);
+    });
+
+    test('aggregates RSSI, SNR, and multi-hop route metrics', () {
+      final now = DateTime(2026, 3, 12, 12, 0, 0);
+      final snapshot = LiveTrafficSummary.fromLogs([
+        _log(
+          timestamp: now.subtract(const Duration(seconds: 30)),
+          direction: PacketDirection.rx,
+          rawData: _multiHopRaw(hops: [0xC0, 0x10, 0x63, 0x01, 0x68, 0xD9]),
+          responseCode: 0x88,
+          snrDb: 12.0,
+          rssiDbm: -84,
+        ),
+        _log(
+          timestamp: now.subtract(const Duration(seconds: 15)),
+          direction: PacketDirection.rx,
+          rawData: _multiHopRaw(hops: [0xDE, 0xAD, 0xBE, 0xEF]),
+          responseCode: 0x88,
+          snrDb: 6.0,
+          rssiDbm: -90,
+        ),
+        _log(
+          timestamp: now.subtract(const Duration(seconds: 5)),
+          direction: PacketDirection.tx,
+          rawData: [0x03, 0x04],
+          responseCode: 0x88,
+        ),
+      ], now: now);
+
+      expect(snapshot.latestRssiDbm, -90);
+      expect(snapshot.latestSnrDb, 6.0);
+      expect(snapshot.avgRssiDbm, closeTo(-87.0, 0.01));
+      expect(snapshot.avgSnrDb, closeTo(9.0, 0.01));
+      expect(snapshot.multiHopCount, 2);
+      expect(snapshot.avgHopCount, closeTo(2.5, 0.01));
+      expect(snapshot.busyness, LiveTrafficBusyness.quiet);
+    });
+
+    test('supports clearing the live view without mutating source logs', () {
+      final now = DateTime(2026, 3, 12, 12, 0, 0);
+      final clearAt = now.subtract(const Duration(seconds: 8));
+      final snapshot = LiveTrafficSummary.fromLogs([
+        _log(
+          timestamp: now.subtract(const Duration(seconds: 10)),
+          direction: PacketDirection.rx,
+          rawData: [0x88, 0x00, 0x00],
+          responseCode: 0x88,
+        ),
+        _log(
+          timestamp: now.subtract(const Duration(seconds: 4)),
+          direction: PacketDirection.rx,
+          rawData: [0x88, 0x00, 0x00],
+          responseCode: 0x88,
+        ),
+      ], now: now, clearedAt: clearAt);
+
+      expect(snapshot.totalCount, 1);
+      expect(snapshot.visibleEntries, hasLength(1));
+    });
+  });
+}

test/services/message_storage_service_test.dart

@@ -0,0 +1,101 @@
+import 'dart:typed_data';
+
+import 'package:flutter_test/flutter_test.dart';
+import 'package:meshcore_client/meshcore_client.dart';
+import 'package:meshcore_sar_app/models/message_reception_details.dart';
+import 'package:meshcore_sar_app/services/message_storage_service.dart';
+import 'package:shared_preferences/shared_preferences.dart';
+
+void main() {
+  TestWidgetsFlutterBinding.ensureInitialized();
+
+  setUp(() {
+    SharedPreferences.setMockInitialValues({});
+  });
+
+  test(
+    'retains path bytes for stored unread message when reception sidecar is missing',
+    () async {
+      final storage = MessageStorageService();
+      final message = Message(
+        id: 'msg-1',
+        messageType: MessageType.contact,
+        senderPublicKeyPrefix: Uint8List.fromList([1, 2, 3, 4, 5, 6]),
+        pathLen: 2,
+        textType: MessageTextType.plain,
+        senderTimestamp: 1700000000,
+        text: 'Unread message',
+        receivedAt: DateTime.fromMillisecondsSinceEpoch(1700000000500),
+        isRead: false,
+      );
+
+      await storage.saveMessages(
+        [message],
+        messageReceptionDetails: {
+          message.id: MessageReceptionDetails(
+            capturedAt: DateTime.fromMillisecondsSinceEpoch(1700000000600),
+            pathBytes: const [0xAA, 0xBB, 0xCC],
+          ),
+        },
+      );
+
+      final prefs = await SharedPreferences.getInstance();
+      await prefs.remove('stored_message_reception_details');
+
+      final restoredDetails = await storage.loadMessageReceptionDetails();
+
+      expect(restoredDetails.keys, contains(message.id));
+      expect(restoredDetails[message.id]?.pathBytes, [0xAA, 0xBB, 0xCC]);
+    },
+  );
+
+  test('retains embedded reception details when sidecar is missing', () async {
+    final storage = MessageStorageService();
+    final message = Message(
+      id: 'msg-2',
+      messageType: MessageType.channel,
+      senderPublicKeyPrefix: Uint8List.fromList([6, 5, 4, 3, 2, 1]),
+      channelIdx: 2,
+      pathLen: 3,
+      textType: MessageTextType.plain,
+      senderTimestamp: 1700000100,
+      text: 'Room update',
+      receivedAt: DateTime.fromMillisecondsSinceEpoch(1700000100500),
+      isRead: false,
+    );
+
+    await storage.saveMessages(
+      [message],
+      messageReceptionDetails: {
+        message.id: MessageReceptionDetails(
+          capturedAt: DateTime.fromMillisecondsSinceEpoch(1700000100600),
+          packetLoggedAt: DateTime.fromMillisecondsSinceEpoch(1700000100400),
+          rssiDbm: -91,
+          snrDb: 7.25,
+          pathBytes: const [0xAA, 0xBB, 0xCC, 0xDD],
+          senderToReceiptMs: 1200,
+          estimatedTransmitMs: 800,
+          postTransmitDelayMs: 400,
+        ),
+      },
+    );
+
+    final prefs = await SharedPreferences.getInstance();
+    await prefs.remove('stored_message_reception_details');
+
+    final restoredDetails = await storage.loadMessageReceptionDetails();
+    final restored = restoredDetails[message.id];
+
+    expect(restored, isNotNull);
+    expect(restored!.pathBytes, [0xAA, 0xBB, 0xCC, 0xDD]);
+    expect(restored.rssiDbm, -91);
+    expect(restored.snrDb, 7.25);
+    expect(restored.senderToReceiptMs, 1200);
+    expect(restored.estimatedTransmitMs, 800);
+    expect(restored.postTransmitDelayMs, 400);
+    expect(
+      restored.packetLoggedAt,
+      DateTime.fromMillisecondsSinceEpoch(1700000100400),
+    );
+  });
+}

test/services/path_history_service_test.dart

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

test/utils/log_rx_route_decoder_test.dart

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

test/utils/trace_node_resolver_test.dart

@@ -0,0 +1,80 @@
+import 'package:flutter_test/flutter_test.dart';
+import 'package:latlong2/latlong.dart';
+import 'package:meshcore_sar_app/services/mesh_map_nodes_service.dart';
+import 'package:meshcore_sar_app/utils/trace_node_resolver.dart';
+
+void main() {
+  test(
+    'prefers closest local repeater over online fallback for shared prefix',
+    () {
+      final localNear = _node(
+        name: 'Near Local',
+        publicKey: 'aa1100',
+        latitude: 46.05,
+        longitude: 14.50,
+      );
+      final localFar = _node(
+        name: 'Far Local',
+        publicKey: 'aa2200',
+        latitude: 46.40,
+        longitude: 14.90,
+      );
+      final online = _node(
+        name: 'Online',
+        publicKey: 'aa3300',
+        latitude: 46.06,
+        longitude: 14.51,
+      );
+
+      final resolved = TraceNodeResolver.resolveBest(
+        nodes: [localNear, localFar, online],
+        localPublicKeys: {localNear.publicKey, localFar.publicKey},
+        prefixHex: 'aa',
+        referenceA: const LatLng(46.0, 14.5),
+        referenceB: const LatLng(46.1, 14.5),
+      );
+
+      expect(resolved.node?.name, 'Near Local');
+      expect(resolved.usedOnlineFallback, isFalse);
+      expect(resolved.matchCount, 2);
+      expect(resolved.matchSummary, '2 local matches');
+    },
+  );
+
+  test('falls back to online node only when local match is missing', () {
+    final online = _node(
+      name: 'Online Only',
+      publicKey: 'bb1100',
+      latitude: 46.06,
+      longitude: 14.51,
+    );
+
+    final resolved = TraceNodeResolver.resolveBest(
+      nodes: [online],
+      localPublicKeys: const {},
+      prefixHex: 'bb',
+      referenceA: const LatLng(46.0, 14.5),
+      referenceB: const LatLng(46.1, 14.5),
+    );
+
+    expect(resolved.node?.name, 'Online Only');
+    expect(resolved.usedOnlineFallback, isTrue);
+    expect(resolved.matchCount, 1);
+  });
+}
+
+MeshMapNode _node({
+  required String name,
+  required String publicKey,
+  required double latitude,
+  required double longitude,
+}) {
+  return MeshMapNode(
+    type: 1,
+    name: name,
+    publicKey: publicKey,
+    latitude: latitude,
+    longitude: longitude,
+    updatedAtMs: 1,
+  );
+}

test/widgets/contact_tile_test.dart

@@ -0,0 +1,85 @@
+import 'dart:typed_data';
+
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:meshcore_sar_app/l10n/app_localizations.dart';
+import 'package:meshcore_sar_app/models/contact.dart';
+import 'package:meshcore_sar_app/providers/connection_provider.dart';
+import 'package:meshcore_sar_app/providers/contacts_provider.dart';
+import 'package:meshcore_sar_app/providers/map_provider.dart';
+import 'package:meshcore_sar_app/providers/messages_provider.dart';
+import 'package:meshcore_sar_app/providers/sensors_provider.dart';
+import 'package:meshcore_sar_app/widgets/contacts/contact_tile.dart';
+import 'package:provider/provider.dart';
+import 'package:shared_preferences/shared_preferences.dart';
+
+void main() {
+  setUp(() {
+    SharedPreferences.setMockInitialValues({});
+  });
+
+  Contact buildContact({
+    required String name,
+    required ContactType type,
+    int secondByte = 1,
+  }) {
+    final publicKey = Uint8List(32);
+    publicKey[1] = secondByte;
+
+    return Contact(
+      publicKey: publicKey,
+      type: type,
+      flags: 0,
+      outPathLen: 0,
+      outPath: Uint8List(64),
+      advName: name,
+      lastAdvert: DateTime.now().millisecondsSinceEpoch ~/ 1000,
+      advLat: 46562000,
+      advLon: 14950000,
+      lastMod: DateTime.now().millisecondsSinceEpoch ~/ 1000,
+    );
+  }
+
+  Future<void> pumpTile(WidgetTester tester, Contact contact) async {
+    await tester.pumpWidget(
+      MultiProvider(
+        providers: [
+          ChangeNotifierProvider(create: (_) => ConnectionProvider()),
+          ChangeNotifierProvider(create: (_) => ContactsProvider()),
+          ChangeNotifierProvider(create: (_) => MessagesProvider()),
+          ChangeNotifierProvider(create: (_) => SensorsProvider()),
+          ChangeNotifierProvider(create: (_) => MapProvider()),
+        ],
+        child: MaterialApp(
+          localizationsDelegates: AppLocalizations.localizationsDelegates,
+          supportedLocales: AppLocalizations.supportedLocales,
+          home: Scaffold(body: ContactTile(contact: contact)),
+        ),
+      ),
+    );
+  }
+
+  testWidgets('shows trace action for non-channel contacts', (tester) async {
+    await pumpTile(
+      tester,
+      buildContact(name: 'John Smith', type: ContactType.chat),
+    );
+
+    await tester.tap(find.text('John Smith'));
+    await tester.pumpAndSettle();
+
+    expect(find.text('Trace'), findsOneWidget);
+  });
+
+  testWidgets('does not show trace action for channels', (tester) async {
+    await pumpTile(
+      tester,
+      buildContact(name: 'Ops', type: ContactType.channel, secondByte: 3),
+    );
+
+    await tester.tap(find.text('Ops'));
+    await tester.pumpAndSettle();
+
+    expect(find.text('Trace'), findsNothing);
+  });
+}