fix: Use GitHub client #1928

ref:

.github/workflows/build-artifacts.yml

@@ -301,7 +301,7 @@ jobs:
         run: flutter pub get
 
       - name: Build web release
-        run: flutter build web --release --base-href /meshcore-sar/
+        run: flutter build web --wasm --release --base-href /meshcore-sar/
 
       - name: Upload pages artifact
         uses: actions/upload-pages-artifact@v3

Makefile

@@ -135,6 +135,9 @@ clean: ## Clean build artifacts
 	flutter clean
 	rm -rf $(BUILD_DIR)
 
+build-web: ## Build web with WebAssembly
+	flutter build web --wasm --release
+
 # Build for all platforms
 build-all: bump ## Build for Android and iOS
 	flutter build apk --release

ios/Runner.xcodeproj/project.pbxproj

@@ -489,7 +489,7 @@
 			buildSettings = {
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				CLANG_ENABLE_MODULES = YES;
-				CURRENT_PROJECT_VERSION = 126;
+				CURRENT_PROJECT_VERSION = 129;
 				DEVELOPMENT_TEAM = JND55328G8;
 				ENABLE_BITCODE = NO;
 				INFOPLIST_FILE = Runner/Info.plist;
@@ -511,7 +511,7 @@
 			buildSettings = {
 				BUNDLE_LOADER = "$(TEST_HOST)";
 				CODE_SIGN_STYLE = Automatic;
-				CURRENT_PROJECT_VERSION = 126;
+				CURRENT_PROJECT_VERSION = 129;
 				DEVELOPMENT_TEAM = JND55328G8;
 				GENERATE_INFOPLIST_FILE = YES;
 				MARKETING_VERSION = 1.0;
@@ -530,7 +530,7 @@
 			buildSettings = {
 				BUNDLE_LOADER = "$(TEST_HOST)";
 				CODE_SIGN_STYLE = Automatic;
-				CURRENT_PROJECT_VERSION = 126;
+				CURRENT_PROJECT_VERSION = 129;
 				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 = 126;
+				CURRENT_PROJECT_VERSION = 129;
 				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 = 126;
+				CURRENT_PROJECT_VERSION = 129;
 				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 = 126;
+				CURRENT_PROJECT_VERSION = 129;
 				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>126</string>
+	<string>129</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="0.000231">
+      <testcase classname="fastlane.lanes" name="0: default_platform" time="0.000201">
         
       </testcase>
     
       
-      <testcase classname="fastlane.lanes" name="1: increment_build_number" time="0.728696">
+      <testcase classname="fastlane.lanes" name="1: increment_build_number" time="0.700922">
         
       </testcase>
     
       
-      <testcase classname="fastlane.lanes" name="2: build_app" time="101.589371">
+      <testcase classname="fastlane.lanes" name="2: build_app" time="102.603385">
         
       </testcase>
     
       
-      <testcase classname="fastlane.lanes" name="3: upload_to_app_store" time="690.798016">
+      <testcase classname="fastlane.lanes" name="3: upload_to_app_store" time="2538.71069">
         
       </testcase>
     

lib/l10n/app_en.arb

@@ -660,6 +660,30 @@
   "@flood": {
     "description": "Flood routing indicator"
   },
+  "autoSend": "Auto Send",
+  "@autoSend": {
+    "description": "Auto send mode - uses current path"
+  },
+  "autoSendDescription": "Send via current path.",
+  "@autoSendDescription": {
+    "description": "Description for auto send mode"
+  },
+  "sendDirect": "Send Direct",
+  "@sendDirect": {
+    "description": "Send direct mode - zero-hop to contact"
+  },
+  "sendDirectDescription": "Send directly to this contact.",
+  "@sendDirectDescription": {
+    "description": "Description for send direct mode"
+  },
+  "sendFlood": "Send Flood",
+  "@sendFlood": {
+    "description": "Send flood mode - via all repeaters"
+  },
+  "sendFloodDescription": "Send via all repeaters.",
+  "@sendFloodDescription": {
+    "description": "Description for send flood mode"
+  },
   "loggedIn": "Logged In",
   "@loggedIn": {
     "description": "Logged in status badge"

lib/l10n/app_localizations.dart

@@ -961,6 +961,42 @@ abstract class AppLocalizations {
   /// **'Flood'**
   String get flood;
 
+  /// Auto send mode - uses current path
+  ///
+  /// In en, this message translates to:
+  /// **'Auto Send'**
+  String get autoSend;
+
+  /// Description for auto send mode
+  ///
+  /// In en, this message translates to:
+  /// **'Send via current path.'**
+  String get autoSendDescription;
+
+  /// Send direct mode - zero-hop to contact
+  ///
+  /// In en, this message translates to:
+  /// **'Send Direct'**
+  String get sendDirect;
+
+  /// Description for send direct mode
+  ///
+  /// In en, this message translates to:
+  /// **'Send directly to this contact.'**
+  String get sendDirectDescription;
+
+  /// Send flood mode - via all repeaters
+  ///
+  /// In en, this message translates to:
+  /// **'Send Flood'**
+  String get sendFlood;
+
+  /// Description for send flood mode
+  ///
+  /// In en, this message translates to:
+  /// **'Send via all repeaters.'**
+  String get sendFloodDescription;
+
   /// Logged in status badge
   ///
   /// In en, this message translates to:

lib/l10n/app_localizations_de.dart

@@ -481,6 +481,24 @@ class AppLocalizationsDe extends AppLocalizations {
   @override
   String get flood => 'Flut';
 
+  @override
+  String get autoSend => 'Auto Send';
+
+  @override
+  String get autoSendDescription => 'Send via current path.';
+
+  @override
+  String get sendDirect => 'Send Direct';
+
+  @override
+  String get sendDirectDescription => 'Send directly to this contact.';
+
+  @override
+  String get sendFlood => 'Send Flood';
+
+  @override
+  String get sendFloodDescription => 'Send via all repeaters.';
+
   @override
   String get loggedIn => 'Angemeldet';
 

lib/l10n/app_localizations_el.dart

@@ -483,6 +483,24 @@ class AppLocalizationsEl extends AppLocalizations {
   @override
   String get flood => 'Πλημμυρικό';
 
+  @override
+  String get autoSend => 'Auto Send';
+
+  @override
+  String get autoSendDescription => 'Send via current path.';
+
+  @override
+  String get sendDirect => 'Send Direct';
+
+  @override
+  String get sendDirectDescription => 'Send directly to this contact.';
+
+  @override
+  String get sendFlood => 'Send Flood';
+
+  @override
+  String get sendFloodDescription => 'Send via all repeaters.';
+
   @override
   String get loggedIn => 'Συνδεδεμένος';
 

lib/l10n/app_localizations_en.dart

@@ -478,6 +478,24 @@ class AppLocalizationsEn extends AppLocalizations {
   @override
   String get flood => 'Flood';
 
+  @override
+  String get autoSend => 'Auto Send';
+
+  @override
+  String get autoSendDescription => 'Send via current path.';
+
+  @override
+  String get sendDirect => 'Send Direct';
+
+  @override
+  String get sendDirectDescription => 'Send directly to this contact.';
+
+  @override
+  String get sendFlood => 'Send Flood';
+
+  @override
+  String get sendFloodDescription => 'Send via all repeaters.';
+
   @override
   String get loggedIn => 'Logged In';
 

lib/l10n/app_localizations_es.dart

@@ -481,6 +481,24 @@ class AppLocalizationsEs extends AppLocalizations {
   @override
   String get flood => 'Inundación';
 
+  @override
+  String get autoSend => 'Auto Send';
+
+  @override
+  String get autoSendDescription => 'Send via current path.';
+
+  @override
+  String get sendDirect => 'Send Direct';
+
+  @override
+  String get sendDirectDescription => 'Send directly to this contact.';
+
+  @override
+  String get sendFlood => 'Send Flood';
+
+  @override
+  String get sendFloodDescription => 'Send via all repeaters.';
+
   @override
   String get loggedIn => 'Sesión iniciada';
 

lib/l10n/app_localizations_fr.dart

@@ -483,6 +483,24 @@ class AppLocalizationsFr extends AppLocalizations {
   @override
   String get flood => 'Inondation';
 
+  @override
+  String get autoSend => 'Auto Send';
+
+  @override
+  String get autoSendDescription => 'Send via current path.';
+
+  @override
+  String get sendDirect => 'Send Direct';
+
+  @override
+  String get sendDirectDescription => 'Send directly to this contact.';
+
+  @override
+  String get sendFlood => 'Send Flood';
+
+  @override
+  String get sendFloodDescription => 'Send via all repeaters.';
+
   @override
   String get loggedIn => 'Connecté';
 

lib/l10n/app_localizations_hr.dart

@@ -476,6 +476,24 @@ class AppLocalizationsHr extends AppLocalizations {
   @override
   String get flood => 'Preplavljanje';
 
+  @override
+  String get autoSend => 'Auto Send';
+
+  @override
+  String get autoSendDescription => 'Send via current path.';
+
+  @override
+  String get sendDirect => 'Send Direct';
+
+  @override
+  String get sendDirectDescription => 'Send directly to this contact.';
+
+  @override
+  String get sendFlood => 'Send Flood';
+
+  @override
+  String get sendFloodDescription => 'Send via all repeaters.';
+
   @override
   String get loggedIn => 'Prijavljen';
 

lib/l10n/app_localizations_it.dart

@@ -480,6 +480,24 @@ class AppLocalizationsIt extends AppLocalizations {
   @override
   String get flood => 'Flood';
 
+  @override
+  String get autoSend => 'Auto Send';
+
+  @override
+  String get autoSendDescription => 'Send via current path.';
+
+  @override
+  String get sendDirect => 'Send Direct';
+
+  @override
+  String get sendDirectDescription => 'Send directly to this contact.';
+
+  @override
+  String get sendFlood => 'Send Flood';
+
+  @override
+  String get sendFloodDescription => 'Send via all repeaters.';
+
   @override
   String get loggedIn => 'Connesso';
 

lib/l10n/app_localizations_pl.dart

@@ -481,6 +481,24 @@ class AppLocalizationsPl extends AppLocalizations {
   @override
   String get flood => 'Rozgłoszeniowo';
 
+  @override
+  String get autoSend => 'Auto Send';
+
+  @override
+  String get autoSendDescription => 'Send via current path.';
+
+  @override
+  String get sendDirect => 'Send Direct';
+
+  @override
+  String get sendDirectDescription => 'Send directly to this contact.';
+
+  @override
+  String get sendFlood => 'Send Flood';
+
+  @override
+  String get sendFloodDescription => 'Send via all repeaters.';
+
   @override
   String get loggedIn => 'Zalogowano';
 

lib/l10n/app_localizations_pt.dart

@@ -482,6 +482,24 @@ class AppLocalizationsPt extends AppLocalizations {
   @override
   String get flood => 'Inundação';
 
+  @override
+  String get autoSend => 'Auto Send';
+
+  @override
+  String get autoSendDescription => 'Send via current path.';
+
+  @override
+  String get sendDirect => 'Send Direct';
+
+  @override
+  String get sendDirectDescription => 'Send directly to this contact.';
+
+  @override
+  String get sendFlood => 'Send Flood';
+
+  @override
+  String get sendFloodDescription => 'Send via all repeaters.';
+
   @override
   String get loggedIn => 'Conectado';
 

lib/l10n/app_localizations_ru.dart

@@ -480,6 +480,24 @@ class AppLocalizationsRu extends AppLocalizations {
   @override
   String get flood => 'Широковещательно';
 
+  @override
+  String get autoSend => 'Auto Send';
+
+  @override
+  String get autoSendDescription => 'Send via current path.';
+
+  @override
+  String get sendDirect => 'Send Direct';
+
+  @override
+  String get sendDirectDescription => 'Send directly to this contact.';
+
+  @override
+  String get sendFlood => 'Send Flood';
+
+  @override
+  String get sendFloodDescription => 'Send via all repeaters.';
+
   @override
   String get loggedIn => 'Вход выполнен';
 

lib/l10n/app_localizations_sl.dart

@@ -477,6 +477,24 @@ class AppLocalizationsSl extends AppLocalizations {
   @override
   String get flood => 'Razpršitev';
 
+  @override
+  String get autoSend => 'Auto Send';
+
+  @override
+  String get autoSendDescription => 'Send via current path.';
+
+  @override
+  String get sendDirect => 'Send Direct';
+
+  @override
+  String get sendDirectDescription => 'Send directly to this contact.';
+
+  @override
+  String get sendFlood => 'Send Flood';
+
+  @override
+  String get sendFloodDescription => 'Send via all repeaters.';
+
   @override
   String get loggedIn => 'Prijavljen';
 

lib/l10n/app_localizations_tr.dart

@@ -480,6 +480,24 @@ class AppLocalizationsTr extends AppLocalizations {
   @override
   String get flood => 'Yayılım';
 
+  @override
+  String get autoSend => 'Auto Send';
+
+  @override
+  String get autoSendDescription => 'Send via current path.';
+
+  @override
+  String get sendDirect => 'Send Direct';
+
+  @override
+  String get sendDirectDescription => 'Send directly to this contact.';
+
+  @override
+  String get sendFlood => 'Send Flood';
+
+  @override
+  String get sendFloodDescription => 'Send via all repeaters.';
+
   @override
   String get loggedIn => 'Giriş yapıldı';
 

lib/l10n/app_localizations_uk.dart

@@ -480,6 +480,24 @@ class AppLocalizationsUk extends AppLocalizations {
   @override
   String get flood => 'Широкомовно';
 
+  @override
+  String get autoSend => 'Auto Send';
+
+  @override
+  String get autoSendDescription => 'Send via current path.';
+
+  @override
+  String get sendDirect => 'Send Direct';
+
+  @override
+  String get sendDirectDescription => 'Send directly to this contact.';
+
+  @override
+  String get sendFlood => 'Send Flood';
+
+  @override
+  String get sendFloodDescription => 'Send via all repeaters.';
+
   @override
   String get loggedIn => 'Увійшли';
 

lib/l10n/app_localizations_zh.dart

@@ -464,6 +464,24 @@ class AppLocalizationsZh extends AppLocalizations {
   @override
   String get flood => '泛洪';
 
+  @override
+  String get autoSend => 'Auto Send';
+
+  @override
+  String get autoSendDescription => 'Send via current path.';
+
+  @override
+  String get sendDirect => 'Send Direct';
+
+  @override
+  String get sendDirectDescription => 'Send directly to this contact.';
+
+  @override
+  String get sendFlood => 'Send Flood';
+
+  @override
+  String get sendFloodDescription => 'Send via all repeaters.';
+
   @override
   String get loggedIn => '已登录';
 

lib/l10n/untranslated.json

@@ -1,5 +1,11 @@
 {
   "de": [
+    "autoSend",
+    "autoSendDescription",
+    "sendDirect",
+    "sendDirectDescription",
+    "sendFlood",
+    "sendFloodDescription",
     "postConnectDiscoveryTitle",
     "postConnectDiscoveryDescription",
     "setRegionScope",
@@ -16,6 +22,12 @@
   ],
 
   "el": [
+    "autoSend",
+    "autoSendDescription",
+    "sendDirect",
+    "sendDirectDescription",
+    "sendFlood",
+    "sendFloodDescription",
     "postConnectDiscoveryTitle",
     "postConnectDiscoveryDescription",
     "setRegionScope",
@@ -32,6 +44,12 @@
   ],
 
   "es": [
+    "autoSend",
+    "autoSendDescription",
+    "sendDirect",
+    "sendDirectDescription",
+    "sendFlood",
+    "sendFloodDescription",
     "postConnectDiscoveryTitle",
     "postConnectDiscoveryDescription",
     "setRegionScope",
@@ -48,6 +66,12 @@
   ],
 
   "fr": [
+    "autoSend",
+    "autoSendDescription",
+    "sendDirect",
+    "sendDirectDescription",
+    "sendFlood",
+    "sendFloodDescription",
     "postConnectDiscoveryTitle",
     "postConnectDiscoveryDescription",
     "setRegionScope",
@@ -64,6 +88,12 @@
   ],
 
   "hr": [
+    "autoSend",
+    "autoSendDescription",
+    "sendDirect",
+    "sendDirectDescription",
+    "sendFlood",
+    "sendFloodDescription",
     "postConnectDiscoveryTitle",
     "postConnectDiscoveryDescription",
     "setRegionScope",
@@ -80,6 +110,12 @@
   ],
 
   "it": [
+    "autoSend",
+    "autoSendDescription",
+    "sendDirect",
+    "sendDirectDescription",
+    "sendFlood",
+    "sendFloodDescription",
     "postConnectDiscoveryTitle",
     "postConnectDiscoveryDescription",
     "setRegionScope",
@@ -96,6 +132,12 @@
   ],
 
   "pl": [
+    "autoSend",
+    "autoSendDescription",
+    "sendDirect",
+    "sendDirectDescription",
+    "sendFlood",
+    "sendFloodDescription",
     "postConnectDiscoveryTitle",
     "postConnectDiscoveryDescription",
     "setRegionScope",
@@ -112,6 +154,12 @@
   ],
 
   "pt": [
+    "autoSend",
+    "autoSendDescription",
+    "sendDirect",
+    "sendDirectDescription",
+    "sendFlood",
+    "sendFloodDescription",
     "postConnectDiscoveryTitle",
     "postConnectDiscoveryDescription",
     "setRegionScope",
@@ -128,6 +176,12 @@
   ],
 
   "ru": [
+    "autoSend",
+    "autoSendDescription",
+    "sendDirect",
+    "sendDirectDescription",
+    "sendFlood",
+    "sendFloodDescription",
     "postConnectDiscoveryTitle",
     "postConnectDiscoveryDescription",
     "setRegionScope",
@@ -144,6 +198,12 @@
   ],
 
   "sl": [
+    "autoSend",
+    "autoSendDescription",
+    "sendDirect",
+    "sendDirectDescription",
+    "sendFlood",
+    "sendFloodDescription",
     "postConnectDiscoveryTitle",
     "postConnectDiscoveryDescription",
     "setRegionScope",
@@ -160,6 +220,12 @@
   ],
 
   "tr": [
+    "autoSend",
+    "autoSendDescription",
+    "sendDirect",
+    "sendDirectDescription",
+    "sendFlood",
+    "sendFloodDescription",
     "postConnectDiscoveryTitle",
     "postConnectDiscoveryDescription",
     "setRegionScope",
@@ -176,6 +242,12 @@
   ],
 
   "uk": [
+    "autoSend",
+    "autoSendDescription",
+    "sendDirect",
+    "sendDirectDescription",
+    "sendFlood",
+    "sendFloodDescription",
     "postConnectDiscoveryTitle",
     "postConnectDiscoveryDescription",
     "setRegionScope",
@@ -192,6 +264,12 @@
   ],
 
   "zh": [
+    "autoSend",
+    "autoSendDescription",
+    "sendDirect",
+    "sendDirectDescription",
+    "sendFlood",
+    "sendFloodDescription",
     "postConnectDiscoveryTitle",
     "postConnectDiscoveryDescription",
     "setRegionScope",

lib/models/channel.dart

@@ -122,6 +122,15 @@ class Channel {
   /// Base64-encoded PSK for sharing with firmware CLI and related tooling.
   String get pskBase64 => base64.encode(secret);
 
+  /// MeshCore group packets carry the first byte of SHA256(channel secret).
+  int get hashByte {
+    final digest = sha256.convert(secret);
+    return digest.bytes.first;
+  }
+
+  String get hashHex =>
+      hashByte.toRadixString(16).padLeft(2, '0').toUpperCase();
+
   /// Display name for the channel
   /// Returns "Public" for channel 0, otherwise returns the custom name or "Channel N"
   String get displayName {

lib/providers/app_provider.dart

@@ -2879,8 +2879,13 @@ class AppProvider with ChangeNotifier {
       timestampSeconds: DateTime.now().millisecondsSinceEpoch ~/ 1000,
     );
     debugPrint(
-      '📍 [AppProvider] Sending fast GPS update ($reason): '
-      '${position.latitude}, ${position.longitude} via channel $channelIdx',
+      '📤 [AppProvider] Fast GPS send '
+      'reason=$reason '
+      'sender=$senderKey6 '
+      'channel=$channelIdx '
+      'lat=${position.latitude} '
+      'lon=${position.longitude} '
+      'ts=${packet.timestampSeconds}',
     );
     try {
       await connectionProvider.sendChannelData(
@@ -2888,11 +2893,32 @@ class AppProvider with ChangeNotifier {
         dataType: MeshCoreConstants.dataTypeDev,
         payload: packet.encodeBinary(),
       );
+      debugPrint(
+        '✅ [AppProvider] Fast GPS sent '
+        'sender=$senderKey6 channel=$channelIdx ts=${packet.timestampSeconds}',
+      );
     } catch (e) {
       debugPrint('⚠️ [AppProvider] Fast GPS send failed: $e');
     }
   }
 
+  Future<bool> sendTestFastLocationUpdate() async {
+    if (!connectionProvider.deviceInfo.isConnected) {
+      return false;
+    }
+
+    final position = await locationTrackingService.getCurrentPosition(
+      timeLimit: const Duration(seconds: 10),
+      retryCount: 1,
+    );
+    if (position == null) {
+      return false;
+    }
+
+    await _sendFastLocationUpdate(position, reason: 'test');
+    return true;
+  }
+
   Contact? _resolveVoiceFetchRequester(VoiceFetchRequest request) {
     final liveContact = _resolveContactByPrefixHex(request.requesterKey6);
     if (liveContact != null) {

lib/providers/channels_provider.dart

@@ -29,6 +29,16 @@ class ChannelsProvider with ChangeNotifier {
     return index == 0 ? 'Public' : 'Channel $index';
   }
 
+  List<Channel> getChannelsByHashByte(int hashByte) {
+    return _channels.values.where((channel) => channel.hashByte == hashByte).toList()
+      ..sort((a, b) => a.index.compareTo(b.index));
+  }
+
+  String? getUniqueChannelDisplayNameByHashByte(int hashByte) {
+    final matches = getChannelsByHashByte(hashByte);
+    return matches.length == 1 ? matches.single.displayName : null;
+  }
+
   /// Add or update a channel
   void addOrUpdateChannel({
     required int index,

lib/providers/connection_provider.dart

@@ -47,6 +47,23 @@ class PingResult {
   });
 }
 
+/// Result of a relay ping (trace path) operation
+class RelayPingResult {
+  final bool success;
+  final int durationMs;
+  final double snrThere;
+  final double snrBack;
+  final int hopCount;
+
+  const RelayPingResult({
+    required this.success,
+    required this.durationMs,
+    required this.snrThere,
+    required this.snrBack,
+    required this.hopCount,
+  });
+}
+
 /// Scanned device with RSSI information
 class ScannedDevice {
   final BluetoothDevice device;
@@ -172,6 +189,8 @@ class ConnectionProvider with ChangeNotifier {
       MessageDeliveryTracker();
   final PingTracker _pingTracker = PingTracker();
   final Map<String, Future<PingResult>> _pendingSmartPings = {};
+  final Map<int, Completer<RelayPingResult>> _pendingRelayPings = {};
+  final Map<int, int> _relayPingStartTimes = {};
 
   // Expose room login states
   Map<String, RoomLoginState> get roomLoginStates =>
@@ -631,6 +650,10 @@ class ConnectionProvider with ChangeNotifier {
       notifyListeners();
     };
 
+    service.onTraceDataReceived = (nonce, hopCount, snrThere, snrBack) {
+      _handleTraceDataReceived(nonce, hopCount, snrThere, snrBack);
+    };
+
     service.onTxActivity = () {
       _txActivity = true;
       notifyListeners();
@@ -2036,6 +2059,70 @@ class ConnectionProvider with ChangeNotifier {
     }
   }
 
+  /// Ping a relay/repeater using trace path (command 36).
+  /// Returns RTT, SNR there/back, and hop count.
+  Future<RelayPingResult> pingRelay(Contact contact) async {
+    if (!_activeService.isConnected) {
+      return const RelayPingResult(
+        success: false, durationMs: 0, snrThere: 0, snrBack: 0, hopCount: 0,
+      );
+    }
+
+    final nonce = Random().nextInt(0xFFFFFFFF);
+    final completer = Completer<RelayPingResult>();
+    _pendingRelayPings[nonce] = completer;
+    _relayPingStartTimes[nonce] = DateTime.now().millisecondsSinceEpoch;
+
+    // Timeout after 10 seconds
+    final timer = Timer(const Duration(seconds: 10), () {
+      _pendingRelayPings.remove(nonce);
+      _relayPingStartTimes.remove(nonce);
+      if (!completer.isCompleted) {
+        completer.complete(const RelayPingResult(
+          success: false, durationMs: 0, snrThere: 0, snrBack: 0, hopCount: 0,
+        ));
+      }
+    });
+
+    try {
+      // Zero-hop ping: prefixSize=1 sends 1 byte of public key, hopType=0
+      await _activeService.sendTracePath(
+        nonce: nonce,
+        prefixSize: 1,
+        contactPublicKey: contact.publicKey,
+      );
+      final result = await completer.future;
+      timer.cancel();
+      return result;
+    } catch (e) {
+      timer.cancel();
+      _pendingRelayPings.remove(nonce);
+      _relayPingStartTimes.remove(nonce);
+      return const RelayPingResult(
+        success: false, durationMs: 0, snrThere: 0, snrBack: 0, hopCount: 0,
+      );
+    }
+  }
+
+  void _handleTraceDataReceived(
+    int nonce, int hopCount, double snrThere, double snrBack,
+  ) {
+    final completer = _pendingRelayPings.remove(nonce);
+    final startTime = _relayPingStartTimes.remove(nonce);
+    if (completer != null && !completer.isCompleted) {
+      final durationMs = startTime != null
+          ? DateTime.now().millisecondsSinceEpoch - startTime
+          : 0;
+      completer.complete(RelayPingResult(
+        success: true,
+        durationMs: durationMs,
+        snrThere: snrThere,
+        snrBack: snrBack,
+        hopCount: hopCount,
+      ));
+    }
+  }
+
   String _publicKeyToHex(Uint8List publicKey) {
     return publicKey.map((b) => b.toRadixString(16).padLeft(2, '0')).join('');
   }
@@ -2880,6 +2967,32 @@ class ConnectionProvider with ChangeNotifier {
     }
   }
 
+  /// Set a contact to zero-hop direct mode (no mesh forwarding).
+  ///
+  /// This forces the firmware to send directly to this contact without
+  /// using any repeaters, matching the "Send Direct" option in the
+  /// official MeshCore client.
+  Future<void> setContactDirect(Contact contact) async {
+    if (!_activeService.isConnected) {
+      _error = 'Not connected to device';
+      notifyListeners();
+      return;
+    }
+
+    try {
+      _error = null;
+      final updatedContact = contact.copyWith(
+        outPathLen: 0, // descriptor: hashSize=1, hopCount=0 → zero-hop direct
+        outPath: Uint8List(64),
+      );
+      await _activeService.addOrUpdateContact(updatedContact);
+    } catch (e) {
+      _error = 'Failed to set direct path: $e';
+      notifyListeners();
+      rethrow;
+    }
+  }
+
   /// Remove a contact from the companion radio
   ///
   /// Deletes the contact from the device's internal contact table.

lib/providers/contacts_provider.dart

@@ -275,10 +275,10 @@ class ContactsProvider with ChangeNotifier {
 
   /// Clear runtime contact state before a live device contact sync begins.
   ///
-  /// This intentionally does not touch persisted storage. It keeps any saved
-  /// contact groups for the active profile, but removes stale in-memory device
-  /// contacts and discovery state so a newly connected device starts from an
-  /// empty list while sync is in progress.
+  /// This intentionally does not touch persisted storage. It snapshots the
+  /// current in-memory contacts so sync updates can still merge against the
+  /// latest local state, but keeps the visible list intact so reconnects do
+  /// not blank the UI while the device is resyncing.
   Future<void> prepareForDeviceContactSync({Uint8List? devicePublicKey}) async {
     _setSelfDevicePublicKey(devicePublicKey);
     if (!_isInitialized) {
@@ -292,7 +292,7 @@ class ContactsProvider with ChangeNotifier {
     }
 
     debugPrint(
-      '🧹 [ContactsProvider] Clearing runtime contacts before device sync',
+      '🧹 [ContactsProvider] Preparing retained contact state for device sync',
     );
     _retainedContactsForSync
       ..clear()
@@ -301,12 +301,6 @@ class ContactsProvider with ChangeNotifier {
           (contact) => MapEntry(contact.publicKeyHex, contact),
         ),
       );
-    _contacts.clear();
-    _pendingAdverts.clear();
-    _estimatedLocations.clear();
-    _rssiObservations.clear();
-    _ensurePublicChannelExists();
-    notifyListeners();
   }
 
   /// Remove self-contact from loaded contacts (called after BLE connection established)
@@ -1143,13 +1137,34 @@ class ContactsProvider with ChangeNotifier {
       ),
     );
 
+    debugPrint(
+      '📥 [ContactsProvider] Fast GPS received '
+      'sender=${packet.senderKey6} '
+      'contact=${contact.displayName} '
+      'contactKey=${contact.publicKeyHex} '
+      'lat=${packet.latitude} '
+      'lon=${packet.longitude} '
+      'ts=${packet.timestampSeconds}',
+    );
+
     final updatedContact = contact.copyWith(
       telemetry: updatedTelemetry,
       lastAdvert: packet.timestampSeconds,
+      lastMod: packet.timestampSeconds,
       advLat: _coordinateToAdvertMicrodegrees(packet.latitude),
       advLon: _coordinateToAdvertMicrodegrees(packet.longitude),
     );
     _contacts[contact.publicKeyHex] = updatedContact;
+    _estimatedLocations[contact.publicKeyHex] = LatLng(
+      packet.latitude,
+      packet.longitude,
+    );
+    debugPrint(
+      '✅ [ContactsProvider] Fast GPS applied '
+      'contact=${updatedContact.displayName} '
+      'contactKey=${updatedContact.publicKeyHex} '
+      'lastAdvert=${updatedContact.lastAdvert}',
+    );
     _persistContacts();
     notifyListeners();
   }

lib/providers/messages_provider.dart

@@ -23,6 +23,7 @@ typedef DisplayMessageEntry = ({Message message, int occurrenceCount});
 /// Messages Provider - manages message history and SAR markers
 class MessagesProvider with ChangeNotifier {
   static const Duration _channelEchoWarningDelay = Duration(seconds: 12);
+  static const Duration _receivedDuplicateWindow = Duration(seconds: 5);
 
   final List<Message> _messages = [];
   final Map<String, SarMarker> _sarMarkers = {};
@@ -666,7 +667,23 @@ class MessagesProvider with ChangeNotifier {
 
     final matchingSentReplayIndex = _findMatchingSentReplayIndex(finalMessage);
     if (matchingSentReplayIndex != -1) {
-      _clearChannelSendWarning(_messages[matchingSentReplayIndex].id);
+      final existingId = _messages[matchingSentReplayIndex].id;
+      _clearChannelSendWarning(existingId);
+      if (contactLocationSnapshot != null) {
+        _messageContactLocations[existingId] = contactLocationSnapshot;
+      }
+      _messageReceptionDetails[existingId] =
+          MessageReceptionDetails.mergeDuplicate(
+            existing: _messageReceptionDetails[existingId],
+            incoming: receptionDetailsSnapshot,
+          );
+      final existingMessage = _messages[matchingSentReplayIndex];
+      _messages[matchingSentReplayIndex] = existingMessage.copyWith(
+        pathLen: finalMessage.pathLen > 0 ? finalMessage.pathLen : existingMessage.pathLen,
+        pathBytes: finalMessage.pathBytes ?? existingMessage.pathBytes,
+      );
+      _persistMessages();
+      return;
     }
 
     _messages.add(finalMessage);
@@ -715,10 +732,25 @@ class MessagesProvider with ChangeNotifier {
       return -1;
     }
 
+    final exactDuplicateIndex = _findExactDuplicateMessageIndex(message);
+    if (exactDuplicateIndex != -1) {
+      return exactDuplicateIndex;
+    }
+
+    final lastConversationDuplicateIndex =
+        _findLastConversationDuplicateMessageIndex(message);
+    if (lastConversationDuplicateIndex != -1) {
+      return lastConversationDuplicateIndex;
+    }
+
+    return -1;
+  }
+
+  int _findExactDuplicateMessageIndex(Message message) {
     for (int index = 0; index < _messages.length; index++) {
       final existing = _messages[index];
       if (existing.isSentMessage ||
-          !_matchesDuplicateScope(existing, message) ||
+          !_matchesExactDuplicateScope(existing, message) ||
           existing.text != message.text) {
         continue;
       }
@@ -735,23 +767,38 @@ class MessagesProvider with ChangeNotifier {
     return -1;
   }
 
-  bool _matchesDuplicateScope(Message existing, Message message) {
+  int _findLastConversationDuplicateMessageIndex(Message message) {
+    for (int index = _messages.length - 1; index >= 0; index--) {
+      final existing = _messages[index];
+      if (!_isSameConversation(existing, message)) {
+        continue;
+      }
+      if (existing.isSentMessage ||
+          existing.isSystemMessage ||
+          existing.text != message.text) {
+        return -1;
+      }
+      final receivedDelta = existing.receivedAt.difference(message.receivedAt).abs();
+      if (receivedDelta > _receivedDuplicateWindow) {
+        return -1;
+      }
+      return _matchesDuplicateSenderIdentity(existing, message) ? index : -1;
+    }
+
+    return -1;
+  }
+
+  bool _matchesExactDuplicateScope(Message existing, Message message) {
     if (existing.messageType != message.messageType) {
       return false;
     }
 
     if (message.isContactMessage) {
-      // Match by sender key + sender timestamp (matches official app's DB
-      // uniqueness: contactPublicKey + senderTimestamp + text + txtType).
-      if (existing.senderKeyShort == message.senderKeyShort &&
-          existing.senderTimestamp == message.senderTimestamp) {
-        return true;
+      if (!_isSameConversation(existing, message)) {
+        return false;
       }
-
-      // Fallback dedup when retransmits surface as separate inbound rows
-      // without a stable timestamp/message id, but still carry the same
-      // visible sender identity and payload.
-      return _matchesDuplicateSenderIdentity(existing, message);
+      return existing.senderTimestamp == message.senderTimestamp &&
+          _matchesDuplicateSenderIdentity(existing, message);
     }
 
     if (message.isChannelMessage) {
@@ -759,27 +806,40 @@ class MessagesProvider with ChangeNotifier {
         return false;
       }
 
-      // Primary dedup: same senderTimestamp = same message from mesh repeats.
-      // Matches official app's DB uniqueness: (channelSecret, senderTimestamp, text).
       if (existing.senderTimestamp == message.senderTimestamp) {
         return true;
       }
-
-      // Secondary: catch near-duplicate repeats within a 30s window
-      // (clock drift between nodes).
-      final withinChannelRepeatWindow =
-          (existing.senderTimestamp - message.senderTimestamp).abs() <= 30;
-      if (!withinChannelRepeatWindow) {
-        return false;
-      }
-
-      return _matchesDuplicateSenderIdentity(existing, message);
+      return false;
     }
 
     // System messages and other types: never deduplicate by scope alone.
     return false;
   }
 
+  bool _isSameConversation(Message existing, Message message) {
+    if (existing.messageType != message.messageType) {
+      return false;
+    }
+
+    if (message.isChannelMessage) {
+      return existing.channelIdx == message.channelIdx;
+    }
+
+    if (!message.isContactMessage) {
+      return false;
+    }
+
+    if (existing.recipientPublicKey != null && message.recipientPublicKey != null) {
+      return _listEquals(existing.recipientPublicKey!, message.recipientPublicKey!);
+    }
+
+    if (existing.recipientPublicKey == null && message.recipientPublicKey == null) {
+      return true;
+    }
+
+    return false;
+  }
+
   bool _matchesDuplicateSenderIdentity(Message existing, Message message) {
     final existingSenderKey = existing.senderKeyShort;
     final incomingSenderKey = message.senderKeyShort;
@@ -809,7 +869,7 @@ class MessagesProvider with ChangeNotifier {
         continue;
       }
 
-      if (_matchesDuplicateScope(existing, message)) {
+      if (_matchesSentReplayScope(existing, message)) {
         return index;
       }
     }
@@ -817,6 +877,24 @@ class MessagesProvider with ChangeNotifier {
     return -1;
   }
 
+  bool _matchesSentReplayScope(Message existing, Message message) {
+    if (!_isSameConversation(existing, message)) {
+      return false;
+    }
+
+    if (existing.senderTimestamp == message.senderTimestamp) {
+      return true;
+    }
+
+    final withinChannelRepeatWindow =
+        (existing.senderTimestamp - message.senderTimestamp).abs() <= 30;
+    if (!withinChannelRepeatWindow) {
+      return false;
+    }
+
+    return _matchesDuplicateSenderIdentity(existing, message);
+  }
+
   /// Add multiple messages
   void addMessages(List<Message> messages) {
     int addedCount = 0;
@@ -1214,9 +1292,7 @@ class MessagesProvider with ChangeNotifier {
     for (final message in messages) {
       final occurrenceCount = _messageOccurrenceCount(message);
       final existingIndex = entries.indexWhere(
-        (entry) =>
-            entry.message.text == message.text &&
-            _matchesDuplicateScope(entry.message, message),
+        (entry) => _shouldCollapseDisplayMessage(entry.message, message),
       );
 
       if (existingIndex == -1) {
@@ -1234,6 +1310,17 @@ class MessagesProvider with ChangeNotifier {
     return entries;
   }
 
+  bool _shouldCollapseDisplayMessage(Message existing, Message message) {
+    if (existing.isSentMessage || message.isSentMessage) {
+      return false;
+    }
+
+    return existing.text == message.text &&
+        (_matchesExactDuplicateScope(existing, message) ||
+            (_isSameConversation(existing, message) &&
+                _matchesDuplicateSenderIdentity(existing, message)));
+  }
+
   int _messageOccurrenceCount(Message message) =>
       _messageReceptionDetails[message.id]?.receivedCopies ?? 1;
 

lib/providers/sensors_provider.dart

@@ -14,7 +14,7 @@ enum SensorRefreshState { idle, refreshing, success, timeout, unavailable }
 
 class SensorsProvider with ChangeNotifier {
   static const Duration _successStateRetention = Duration(minutes: 1);
-  static const int selfAutoRefreshMinutes = 1;
+  static const Duration selfAutoRefreshInterval = Duration(seconds: 30);
   static const String _watchedSensorsKey = 'watched_sensor_keys';
   static const String _visibleSensorMetricsKey = 'visible_sensor_metrics';
   static const String _fieldSpanKey = 'sensor_field_spans';
@@ -374,18 +374,18 @@ class SensorsProvider with ChangeNotifier {
     return List<String>.unmodifiable(dueKeys);
   }
 
-  bool _isRefreshDue(
+  bool _isRefreshDueForInterval(
     String publicKeyHex, {
-    required int minutes,
+    required Duration interval,
     required DateTime refreshTime,
   }) {
-    if (minutes <= 0) {
+    if (interval <= Duration.zero) {
       return false;
     }
 
     final lastRefreshAt = _lastRefreshAttemptAt[publicKeyHex];
     return lastRefreshAt == null ||
-        refreshTime.difference(lastRefreshAt) >= Duration(minutes: minutes);
+        refreshTime.difference(lastRefreshAt) >= interval;
   }
 
   Future<void> toggleMetric(
@@ -769,9 +769,9 @@ class SensorsProvider with ChangeNotifier {
     final self = selfContact(contactsProvider, connectionProvider);
     if (self != null &&
         !dueKeys.contains(self.publicKeyHex) &&
-        _isRefreshDue(
+        _isRefreshDueForInterval(
           self.publicKeyHex,
-          minutes: selfAutoRefreshMinutes,
+          interval: selfAutoRefreshInterval,
           refreshTime: refreshTime,
         )) {
       dueKeys.insert(0, self.publicKeyHex);

lib/screens/live_traffic_screen.dart

@@ -6,6 +6,7 @@ import 'package:provider/provider.dart';
 
 import '../models/ble_packet_log.dart';
 import '../models/contact.dart';
+import '../providers/channels_provider.dart';
 import '../providers/contacts_provider.dart';
 import '../providers/connection_provider.dart';
 import '../services/live_traffic_summary.dart';
@@ -155,6 +156,11 @@ class _LiveTrafficScreenState extends State<LiveTrafficScreen> {
               tooltip: 'Open packet logs',
               icon: const Icon(Icons.list_alt_rounded),
             ),
+          IconButton(
+            onPressed: () => _showPacketTypeHelpSheet(context),
+            tooltip: 'Packet type help',
+            icon: const Icon(Icons.help_outline),
+          ),
           IconButton(
             onPressed: () {
               setState(() {
@@ -278,6 +284,68 @@ class _LiveTrafficScreenState extends State<LiveTrafficScreen> {
       _selectedWindow = selected;
     });
   }
+
+  Future<void> _showPacketTypeHelpSheet(BuildContext context) {
+    final packetTypes = LiveTrafficEntry.knownPayloadTypes;
+    return showModalBottomSheet<void>(
+      context: context,
+      showDragHandle: true,
+      isScrollControlled: true,
+      builder: (context) {
+        final scheme = Theme.of(context).colorScheme;
+        return SafeArea(
+          child: Padding(
+            padding: const EdgeInsets.fromLTRB(16, 0, 16, 16),
+            child: ListView(
+              shrinkWrap: true,
+              children: [
+                Text(
+                  'Packet Types',
+                  style: Theme.of(context).textTheme.titleMedium,
+                ),
+                const SizedBox(height: 6),
+                Text(
+                  'Descriptions below follow the current MeshCore payload definitions.',
+                  style: TextStyle(color: scheme.onSurfaceVariant),
+                ),
+                const SizedBox(height: 16),
+                for (final packetType in packetTypes) ...[
+                  Container(
+                    padding: const EdgeInsets.all(12),
+                    decoration: BoxDecoration(
+                      color: scheme.surfaceContainerHigh,
+                      borderRadius: BorderRadius.circular(14),
+                    ),
+                    child: Column(
+                      crossAxisAlignment: CrossAxisAlignment.start,
+                      children: [
+                        Text(
+                          packetType.title,
+                          style: const TextStyle(
+                            fontSize: 14,
+                            fontWeight: FontWeight.w800,
+                          ),
+                        ),
+                        const SizedBox(height: 4),
+                        Text(
+                          packetType.description,
+                          style: TextStyle(
+                            fontSize: 13,
+                            color: scheme.onSurfaceVariant,
+                          ),
+                        ),
+                      ],
+                    ),
+                  ),
+                  const SizedBox(height: 10),
+                ],
+              ],
+            ),
+          ),
+        );
+      },
+    );
+  }
 }
 
 class _SummaryPanel extends StatelessWidget {
@@ -676,7 +744,11 @@ class _LiveTrafficCard extends StatelessWidget {
     final accent = isRx ? Colors.green : Colors.blue;
     final rxInfo = log.logRxDataInfo;
     final originDistance = _originDistanceLabel(context, entry);
-    final packetDetails = _LiveTrafficPacketDetails.fromEntry(entry);
+    final channelsProvider = _maybeProvider<ChannelsProvider>(context);
+    final packetDetails = _LiveTrafficPacketDetails.fromEntry(
+      entry,
+      channelsProvider: channelsProvider,
+    );
     final signalMetric = SignalMetric.fromRxInfo(rxInfo);
 
     return Material(
@@ -730,7 +802,7 @@ class _LiveTrafficCard extends StatelessWidget {
                         if (entry.payloadMeaning != null)
                           Text(
                             entry.payloadMeaning!,
-                            maxLines: 1,
+                            maxLines: 2,
                             overflow: TextOverflow.ellipsis,
                             style: TextStyle(
                               fontSize: 11,
@@ -989,27 +1061,22 @@ class _LiveTrafficPacketDetails {
     required this.endpointLine,
   });
 
-  factory _LiveTrafficPacketDetails.fromEntry(LiveTrafficEntry entry) {
+  factory _LiveTrafficPacketDetails.fromEntry(
+    LiveTrafficEntry entry, {
+    ChannelsProvider? channelsProvider,
+  }) {
     final route = entry.route;
     final payloadType = route?.payloadType;
     final parsedPayload = _ParsedTrafficPayload.tryParse(
       entry.log.rawData,
       route,
+      channelsProvider: channelsProvider,
     );
     final title = switch (payloadType) {
-      0x00 => 'FLOOD REQUEST',
-      0x01 => 'FLOOD RESPONSE',
-      0x02 => 'FLOOD TEXT',
-      0x03 => 'FLOOD ACK',
-      0x04 => 'FLOOD ADVERTISEMENT',
-      0x05 => 'FLOOD GROUP_TEXT',
-      0x06 => 'FLOOD GROUP_DATA',
-      0x07 => 'FLOOD ANON_REQUEST',
-      0x08 => 'FLOOD RETURNED_PATH',
-      0x09 => 'FLOOD TRACE_PATH',
-      0x0A => 'FLOOD MULTIPART',
-      0x0B => 'FLOOD CONTROL',
-      _ => entry.payloadLabel.toUpperCase(),
+      0x05 => parsedPayload?.channelDisplayName ?? LiveTrafficEntry.payloadTypeTitle(0x05),
+      0x06 => parsedPayload?.channelDisplayName ?? LiveTrafficEntry.payloadTypeTitle(0x06),
+      null => entry.payloadLabel.toUpperCase(),
+      _ => LiveTrafficEntry.payloadTypeTitle(payloadType),
     };
 
     final hopHashes = route?.hopHashes ?? const <String>[];
@@ -1041,13 +1108,15 @@ class _LiveTrafficPacketDetails {
 
 class _ParsedTrafficPayload {
   final String? endpointLine;
+  final String? channelDisplayName;
 
-  const _ParsedTrafficPayload({this.endpointLine});
+  const _ParsedTrafficPayload({this.endpointLine, this.channelDisplayName});
 
   static _ParsedTrafficPayload? tryParse(
     List<int> rawData,
-    DecodedLogRxRoute? route,
-  ) {
+    DecodedLogRxRoute? route, {
+    ChannelsProvider? channelsProvider,
+  }) {
     if (rawData.length < 5 ||
         rawData.first != LiveTrafficSummary.logRxDataResponseCode) {
       return null;
@@ -1084,9 +1153,18 @@ class _ParsedTrafficPayload {
       case 0x05:
       case 0x06:
         if (payload.isEmpty) return const _ParsedTrafficPayload();
+        final channelHash = payload.first;
+        final channelHashHex = channelHash
+            .toRadixString(16)
+            .padLeft(2, '0')
+            .toUpperCase();
+        final channelDisplayName = channelsProvider
+            ?.getUniqueChannelDisplayNameByHashByte(channelHash);
         return _ParsedTrafficPayload(
-          endpointLine:
-              'Channel Hash: ${payload.first.toRadixString(16).padLeft(2, '0').toUpperCase()}',
+          channelDisplayName: channelDisplayName,
+          endpointLine: channelDisplayName == null
+              ? 'Channel Hash: $channelHashHex'
+              : 'Channel: $channelDisplayName ($channelHashHex)',
         );
       case 0x00:
       case 0x01:

lib/screens/messages_tab.dart

@@ -148,11 +148,13 @@ class _MessagesTabState extends State<MessagesTab> {
   TextRange? _activeMentionRange;
   String _mentionQuery = '';
   List<Contact> _mentionSuggestions = const [];
+  ContactsProvider? _contactsProvider;
 
   // Message destination state
   String _destinationType =
       MessageDestinationPreferences.destinationTypeChannel;
   Contact? _selectedRecipient;
+  bool _isDestinationLocked = false;
 
   // Region scope state
   String? _channelRegionScopeName;
@@ -183,13 +185,9 @@ class _MessagesTabState extends State<MessagesTab> {
     super.initState();
     _textController.addListener(_handleComposerChanged);
     _focusNode.addListener(_handleFocusChanged);
-    // Load saved message destination
-    _loadSavedDestination();
     _loadVoiceSettings();
     _loadAllChannelRegionScopes();
-    WidgetsBinding.instance.addPostFrameCallback((_) {
-      _checkForNavigationRequest();
-    });
+    _scheduleDestinationSync();
   }
 
   Future<void> _loadVoiceSettings() async {
@@ -203,11 +201,13 @@ class _MessagesTabState extends State<MessagesTab> {
   @override
   void didChangeDependencies() {
     super.didChangeDependencies();
-    // Reload saved destination and check for navigation request whenever dependencies change
-    WidgetsBinding.instance.addPostFrameCallback((_) {
-      _loadSavedDestination();
-      _checkForNavigationRequest();
-    });
+    final contactsProvider = context.read<ContactsProvider>();
+    if (!identical(_contactsProvider, contactsProvider)) {
+      _contactsProvider?.removeListener(_handleContactsChanged);
+      _contactsProvider = contactsProvider;
+      _contactsProvider?.addListener(_handleContactsChanged);
+    }
+    _scheduleDestinationSync();
   }
 
   @override
@@ -216,6 +216,7 @@ class _MessagesTabState extends State<MessagesTab> {
     _channelReadTimer?.cancel();
     _voiceStreamSub?.cancel();
     _voiceRecorder.dispose();
+    _contactsProvider?.removeListener(_handleContactsChanged);
     _focusNode.removeListener(_handleFocusChanged);
     _textController.dispose();
     _focusNode.dispose();
@@ -228,13 +229,37 @@ class _MessagesTabState extends State<MessagesTab> {
     super.didUpdateWidget(oldWidget);
     if (oldWidget.isActive != widget.isActive) {
       _syncChannelAutoReadTimer(context.read<MessagesProvider>());
+      if (widget.isActive) {
+        _scheduleDestinationSync();
+      }
     }
   }
 
-  void _checkForNavigationRequest() {
+  void _scheduleDestinationSync() {
+    WidgetsBinding.instance.addPostFrameCallback((_) {
+      _synchronizeDestinationState();
+    });
+  }
+
+  void _handleContactsChanged() {
+    if (!mounted) return;
+    _scheduleDestinationSync();
+  }
+
+  Future<void> _synchronizeDestinationState() async {
+    if (!mounted) return;
     final messagesProvider = context.read<MessagesProvider>();
     final targetMessageId = messagesProvider.targetMessageId;
     final targetDestinationType = messagesProvider.targetDestinationType;
+    final targetRecipientPublicKeyHex =
+        messagesProvider.targetRecipientPublicKeyHex;
+
+    await _restoreDestinationState(
+      overrideType: targetDestinationType,
+      overrideRecipientPublicKeyHex: targetRecipientPublicKeyHex,
+    );
+
+    if (!mounted) return;
 
     if (targetMessageId != null) {
       _scrollToMessage(targetMessageId);
@@ -242,11 +267,8 @@ class _MessagesTabState extends State<MessagesTab> {
     }
 
     if (targetDestinationType != null) {
-      _applyPendingDestination(
-        type: targetDestinationType,
-        recipientPublicKeyHex: messagesProvider.targetRecipientPublicKeyHex,
-      );
       messagesProvider.clearDestinationNavigation();
+      _focusNode.requestFocus();
     }
   }
 
@@ -447,56 +469,91 @@ class _MessagesTabState extends State<MessagesTab> {
     _updateCharacterCount();
   }
 
-  /// Load saved message destination from preferences
-  Future<void> _loadSavedDestination() async {
+  Future<void> _restoreDestinationState({
+    String? overrideType,
+    String? overrideRecipientPublicKeyHex,
+  }) async {
+    final lockedDestination =
+        await MessageDestinationPreferences.getLockedDestination();
     final savedDestination =
         await MessageDestinationPreferences.getDestination();
+    final effectiveType =
+        overrideType ??
+        lockedDestination?['type'] ??
+        savedDestination?['type'] ??
+        MessageDestinationPreferences.destinationTypeChannel;
+    final effectivePublicKeyHex =
+        overrideRecipientPublicKeyHex ??
+        lockedDestination?['publicKey'] ??
+        savedDestination?['publicKey'];
+    if (!mounted) return;
+    final contactsProvider = context.read<ContactsProvider>();
+    final recipient = _resolveDestinationRecipient(
+      contactsProvider,
+      effectiveType,
+      effectivePublicKeyHex,
+    );
+    final allowsEmptyRecipient =
+        effectiveType == MessageDestinationPreferences.destinationTypeAll ||
+        (effectiveType == MessageDestinationPreferences.destinationTypeChannel &&
+            effectivePublicKeyHex == null);
+    final shouldFallbackToPublicChannel =
+        recipient == null && !allowsEmptyRecipient;
+    final destinationType = shouldFallbackToPublicChannel
+        ? MessageDestinationPreferences.destinationTypeChannel
+        : effectiveType;
+    final selectedRecipient = shouldFallbackToPublicChannel ? null : recipient;
+    final shouldClearSavedDestination =
+        lockedDestination == null &&
+        overrideType == null &&
+        shouldFallbackToPublicChannel &&
+        savedDestination != null;
 
-    if (savedDestination == null || !mounted) {
-      // Default to public channel
-      return;
-    }
-
-    final type = savedDestination['type']!;
-    final publicKey = savedDestination['publicKey'];
+    if (!mounted) return;
 
     setState(() {
-      _destinationType = type;
+      _isDestinationLocked = lockedDestination != null;
+      _destinationType = destinationType;
+      _selectedRecipient = selectedRecipient;
     });
 
-    // If it's a contact or room, try to find it in the contacts list
-    if (publicKey != null && mounted) {
-      final contactsProvider = context.read<ContactsProvider>();
-      final contact = contactsProvider.contacts.where((c) {
-        return c.publicKeyHex == publicKey;
-      }).firstOrNull;
-
-      if (contact != null) {
-        setState(() {
-          _selectedRecipient = contact;
-        });
-      } else {
-        // Contact/room not found, fallback to public channel
-        debugPrint(
-          '⚠️ [MessagesTab] Saved recipient not found, falling back to public channel',
-        );
-        setState(() {
-          _destinationType =
-              MessageDestinationPreferences.destinationTypeChannel;
-          _selectedRecipient = null;
-        });
-        await MessageDestinationPreferences.clearDestination();
-      }
+    if (shouldClearSavedDestination) {
+      await MessageDestinationPreferences.clearDestination();
     }
 
     _enforceMessageByteLimit();
-
-    // Load region scope for channel destinations
     await _loadRegionScope();
   }
 
+  Contact? _resolveDestinationRecipient(
+    ContactsProvider contactsProvider,
+    String type,
+    String? publicKeyHex,
+  ) {
+    if (publicKeyHex == null) {
+      return null;
+    }
+
+    final candidates = switch (type) {
+      MessageDestinationPreferences.destinationTypeChannel =>
+        contactsProvider.channels,
+      MessageDestinationPreferences.destinationTypeRoom => contactsProvider.rooms,
+      MessageDestinationPreferences.destinationTypeContact =>
+        contactsProvider.chatContacts,
+      _ => contactsProvider.contacts,
+    };
+
+    return candidates.where((contact) {
+      return contact.publicKeyHex == publicKeyHex;
+    }).firstOrNull;
+  }
+
   /// Show recipient selector bottom sheet
   void _showRecipientSelector() {
+    if (_isDestinationLocked) {
+      return;
+    }
+
     final contactsProvider = context.read<ContactsProvider>();
     final messagesProvider = context.read<MessagesProvider>();
 
@@ -552,7 +609,11 @@ class _MessagesTabState extends State<MessagesTab> {
   }
 
   /// Handle recipient selection
-  Future<void> _onRecipientSelected(String type, Contact? recipient) async {
+  Future<void> _onRecipientSelected(
+    String type,
+    Contact? recipient, {
+    bool persistSelection = true,
+  }) async {
     setState(() {
       _destinationType = type;
       _selectedRecipient = recipient;
@@ -565,11 +626,12 @@ class _MessagesTabState extends State<MessagesTab> {
     // Load region scope for channel destinations
     await _loadRegionScope();
 
-    // Save to preferences
-    await MessageDestinationPreferences.setDestination(
-      type,
-      recipientPublicKey: recipient?.publicKeyHex,
-    );
+    if (persistSelection) {
+      await MessageDestinationPreferences.setDestination(
+        type,
+        recipientPublicKey: recipient?.publicKeyHex,
+      );
+    }
 
     // Show confirmation toast
     if (!mounted) return;
@@ -620,23 +682,6 @@ class _MessagesTabState extends State<MessagesTab> {
     });
   }
 
-  Future<void> _applyPendingDestination({
-    required String type,
-    String? recipientPublicKeyHex,
-  }) async {
-    Contact? recipient;
-    if (recipientPublicKeyHex != null) {
-      final contactsProvider = context.read<ContactsProvider>();
-      recipient = contactsProvider.contacts.where((contact) {
-        return contact.publicKeyHex == recipientPublicKeyHex;
-      }).firstOrNull;
-    }
-
-    await _onRecipientSelected(type, recipient);
-    if (!mounted) return;
-    _focusNode.requestFocus();
-  }
-
   void _insertReplyMention(String displayName, {TextRange? replacementRange}) {
     final trimmedName = displayName.trim();
     if (trimmedName.isEmpty) return;
@@ -746,7 +791,11 @@ class _MessagesTabState extends State<MessagesTab> {
       }
     }
 
-    await _onRecipientSelected(destinationType, recipient);
+    await _onRecipientSelected(
+      destinationType,
+      recipient,
+      persistSelection: !_isDestinationLocked,
+    );
     if (!mounted) return;
     if ((message.isChannelMessage || recipient?.isRoom == true) &&
         senderDisplayName != null &&
@@ -943,6 +992,69 @@ class _MessagesTabState extends State<MessagesTab> {
     }
   }
 
+  bool _isContactDestination() {
+    return _destinationType ==
+            MessageDestinationPreferences.destinationTypeContact &&
+        _selectedRecipient != null;
+  }
+
+  void _showSendModeSheet() {
+    if (!mounted) return;
+    final l10n = AppLocalizations.of(context)!;
+
+    showModalBottomSheet<void>(
+      context: context,
+      builder: (sheetContext) {
+        return SafeArea(
+          child: Column(
+            mainAxisSize: MainAxisSize.min,
+            children: [
+              ListTile(
+                leading: const Icon(Icons.route),
+                title: Text(l10n.autoSend),
+                subtitle: Text(l10n.autoSendDescription),
+                onTap: () {
+                  Navigator.pop(sheetContext);
+                  _sendMessage();
+                },
+              ),
+              ListTile(
+                leading: const Icon(Icons.near_me),
+                title: Text(l10n.sendDirect),
+                subtitle: Text(l10n.sendDirectDescription),
+                onTap: () async {
+                  Navigator.pop(sheetContext);
+                  final connectionProvider = context.read<ConnectionProvider>();
+                  if (_selectedRecipient != null &&
+                      connectionProvider.deviceInfo.isConnected) {
+                    await connectionProvider
+                        .setContactDirect(_selectedRecipient!);
+                  }
+                  await _sendMessage();
+                },
+              ),
+              ListTile(
+                leading: const Icon(Icons.cell_tower),
+                title: Text(l10n.sendFlood),
+                subtitle: Text(l10n.sendFloodDescription),
+                onTap: () async {
+                  Navigator.pop(sheetContext);
+                  final connectionProvider = context.read<ConnectionProvider>();
+                  if (_selectedRecipient != null &&
+                      connectionProvider.deviceInfo.isConnected) {
+                    await connectionProvider
+                        .resetPath(_selectedRecipient!.publicKey);
+                  }
+                  await _sendMessage();
+                },
+              ),
+            ],
+          ),
+        );
+      },
+    );
+  }
+
   Future<void> _startTicTacToeGame() async {
     if (!mounted) return;
     if (_destinationType !=
@@ -2379,6 +2491,7 @@ class _MessagesTabState extends State<MessagesTab> {
                   bottomPadding: composerBottomPadding,
                   destinationLabel: _getDestinationLabel(),
                   destinationAvatar: _buildDestinationAvatar(context),
+                  destinationLocked: _isDestinationLocked,
                   mentionSuggestions: _mentionSuggestions,
                   mentionQuery: _mentionQuery,
                   onMentionSelected: _selectMention,
@@ -2387,6 +2500,9 @@ class _MessagesTabState extends State<MessagesTab> {
                   onStartVoiceRecording: _startVoiceRecording,
                   onStopAndSendVoice: _stopAndSendVoice,
                   onSendMessage: _sendMessage,
+                  onLongPressSend: _isContactDestination()
+                      ? _showSendModeSheet
+                      : null,
                   regionScopeName: _channelRegionScopeName,
                   onRegionScopeTap: _channelRegionScopeName != null
                       ? _showRegionScopeSheet

lib/screens/sensors_tab.dart

@@ -6,6 +6,7 @@ import 'package:provider/provider.dart';
 import '../models/contact.dart';
 import '../providers/connection_provider.dart';
 import '../providers/contacts_provider.dart';
+import '../providers/map_provider.dart';
 import '../providers/sensors_provider.dart';
 import '../widgets/sensors/bthome_met_history_sheet.dart';
 import '../widgets/sensors/sensor_telemetry_card.dart';
@@ -21,7 +22,10 @@ class SensorsTab extends StatefulWidget {
 }
 
 class _SensorsTabState extends State<SensorsTab> {
+  static const Duration _autoRefreshTickInterval = Duration(seconds: 30);
   Timer? _minuteTicker;
+  final Map<String, DateTime> _lastCenteredTelemetryAtBySensor =
+      <String, DateTime>{};
 
   @override
   void initState() {
@@ -61,22 +65,8 @@ class _SensorsTabState extends State<SensorsTab> {
       return;
     }
 
-    final now = DateTime.now();
-    final nextMinute = DateTime(
-      now.year,
-      now.month,
-      now.day,
-      now.hour,
-      now.minute + 1,
-    );
-    final delay = nextMinute.difference(now);
-
-    _minuteTicker = Timer(delay, () {
-      if (!mounted) return;
+    _minuteTicker = Timer.periodic(_autoRefreshTickInterval, (_) {
       unawaited(_handleMinuteTick());
-      _minuteTicker = Timer.periodic(const Duration(minutes: 1), (_) {
-        unawaited(_handleMinuteTick());
-      });
     });
   }
 
@@ -225,6 +215,65 @@ class _SensorsTabState extends State<SensorsTab> {
     );
   }
 
+  void _maybeCenterMapOnTelemetryUpdate(
+    Iterable<String> sensorKeys, {
+    required SensorsProvider sensorsProvider,
+    required ContactsProvider contactsProvider,
+    required ConnectionProvider connectionProvider,
+  }) {
+    if (!widget.isActive) {
+      return;
+    }
+
+    Contact? latestContact;
+    DateTime? latestTimestamp;
+
+    for (final key in sensorKeys) {
+      final contact = sensorsProvider.contactForDisplay(
+        key,
+        contactsProvider: contactsProvider,
+        connectionProvider: connectionProvider,
+      );
+      final timestamp = contact?.telemetry?.timestamp;
+      final location = contact?.displayLocation;
+      if (contact == null || timestamp == null || location == null) {
+        continue;
+      }
+
+      final previousTimestamp = _lastCenteredTelemetryAtBySensor[key];
+      if (previousTimestamp != null && !timestamp.isAfter(previousTimestamp)) {
+        continue;
+      }
+
+      if (latestTimestamp == null || timestamp.isAfter(latestTimestamp)) {
+        latestContact = contact;
+        latestTimestamp = timestamp;
+      }
+    }
+
+    if (latestContact == null || latestTimestamp == null) {
+      return;
+    }
+
+    _lastCenteredTelemetryAtBySensor[latestContact.publicKeyHex] =
+        latestTimestamp;
+    WidgetsBinding.instance.addPostFrameCallback((_) {
+      if (!mounted || !widget.isActive) {
+        return;
+      }
+
+      final location = latestContact!.displayLocation;
+      if (location == null) {
+        return;
+      }
+
+      context.read<MapProvider>().navigateToLocation(
+        location: location,
+        zoom: 15.0,
+      );
+    });
+  }
+
   @override
   Widget build(BuildContext context) {
     return Scaffold(
@@ -247,6 +296,16 @@ class _SensorsTabState extends State<SensorsTab> {
                 contactsProvider: contactsProvider,
                 connectionProvider: connectionProvider,
               );
+              final displayKeys = <String>[
+                ...?selfDisplayKey == null ? null : <String>[selfDisplayKey],
+                ...watchedKeys,
+              ];
+              _maybeCenterMapOnTelemetryUpdate(
+                displayKeys,
+                sensorsProvider: sensorsProvider,
+                contactsProvider: contactsProvider,
+                connectionProvider: connectionProvider,
+              );
               final hasAnyCards =
                   selfDisplayKey != null || watchedKeys.isNotEmpty;
 

lib/screens/settings_screen.dart

@@ -25,6 +25,7 @@ import '../services/update_checker_service.dart';
 import '../services/voice_bitrate_preferences.dart';
 import '../services/image_preferences.dart';
 import '../services/route_hash_preferences.dart';
+import '../services/message_destination_preferences.dart';
 import '../services/image_codec_service.dart';
 import '../services/developer_mode_service.dart';
 import '../services/notification_service.dart';
@@ -60,6 +61,8 @@ class SettingsScreen extends StatefulWidget {
 }
 
 class _SettingsScreenState extends State<SettingsScreen> {
+  static const String _publicChannelPublicKeyHex =
+      '0000000000000000000000000000000000000000000000000000000000000000';
   late AppThemeMode _selectedTheme;
   late Locale? _selectedLocale;
   PackageInfo? _packageInfo;
@@ -91,6 +94,10 @@ class _SettingsScreenState extends State<SettingsScreen> {
   bool _muteForegroundNotifications = true;
   bool _isDeveloperModeEnabled = false;
   bool _profilesEnabled = false;
+  bool _messageDestinationLockEnabled = false;
+  String _messageDestinationLockType =
+      MessageDestinationPreferences.destinationTypeChannel;
+  String? _messageDestinationLockPublicKey = _publicChannelPublicKeyHex;
   DateTime? _onlineTraceCacheUpdatedAt;
   bool _isClearingOnlineTraceCache = false;
   int _versionTapCount = 0;
@@ -114,6 +121,7 @@ class _SettingsScreenState extends State<SettingsScreen> {
     _loadOnlineTraceCacheStatus();
     _loadMapPreferences();
     _loadNotificationPreferences();
+    _loadMessageDestinationLock();
   }
 
   @override
@@ -184,6 +192,94 @@ class _SettingsScreenState extends State<SettingsScreen> {
     });
   }
 
+  Future<void> _loadMessageDestinationLock() async {
+    final lockedDestination =
+        await MessageDestinationPreferences.getLockedDestination();
+    if (!mounted) return;
+
+    setState(() {
+      _messageDestinationLockEnabled = lockedDestination != null;
+      _messageDestinationLockType =
+          lockedDestination?['publicKey'] == null
+          ? MessageDestinationPreferences.destinationTypeChannel
+          : lockedDestination?['type'] ??
+                MessageDestinationPreferences.destinationTypeChannel;
+      _messageDestinationLockPublicKey =
+          lockedDestination?['publicKey'] ?? _publicChannelPublicKeyHex;
+    });
+  }
+
+  List<Contact> _messageDestinationLockOptions(
+    ContactsProvider contactsProvider,
+  ) {
+    final channels = List<Contact>.from(contactsProvider.channels)
+      ..sort((a, b) {
+        if (a.isPublicChannel != b.isPublicChannel) {
+          return a.isPublicChannel ? -1 : 1;
+        }
+        return a.displayName.toLowerCase().compareTo(
+          b.displayName.toLowerCase(),
+        );
+      });
+    final rooms = List<Contact>.from(contactsProvider.rooms)
+      ..sort(
+        (a, b) => a.displayName.toLowerCase().compareTo(
+          b.displayName.toLowerCase(),
+        ),
+      );
+
+    return [...channels, ...rooms];
+  }
+
+  String _messageDestinationLockLabel(BuildContext context, Contact contact) {
+    final name = contact.isChannel
+        ? contact.getLocalizedDisplayName(context)
+        : contact.displayName;
+    return contact.isRoom ? 'Room: $name' : 'Channel: $name';
+  }
+
+  String _messageDestinationLockTypeForContact(Contact contact) {
+    return contact.isRoom
+        ? MessageDestinationPreferences.destinationTypeRoom
+        : MessageDestinationPreferences.destinationTypeChannel;
+  }
+
+  String? _selectedMessageDestinationLockValue(List<Contact> destinations) {
+    final currentValue = _messageDestinationLockPublicKey;
+    if (currentValue != null &&
+        destinations.any((contact) => contact.publicKeyHex == currentValue)) {
+      return currentValue;
+    }
+
+    return destinations.isEmpty ? null : destinations.first.publicKeyHex;
+  }
+
+  Future<void> _setMessageDestinationLock({
+    required bool enabled,
+    String? type,
+    String? recipientPublicKey,
+  }) async {
+    final nextType = type ?? _messageDestinationLockType;
+    final nextRecipientPublicKey =
+        recipientPublicKey ??
+        _messageDestinationLockPublicKey ??
+        _publicChannelPublicKeyHex;
+
+    await MessageDestinationPreferences.setLockedDestination(
+      enabled: enabled,
+      type: nextType,
+      recipientPublicKey: enabled ? nextRecipientPublicKey : null,
+    );
+
+    if (!mounted) return;
+
+    setState(() {
+      _messageDestinationLockEnabled = enabled;
+      _messageDestinationLockType = nextType;
+      _messageDestinationLockPublicKey = nextRecipientPublicKey;
+    });
+  }
+
   Future<void> _handleVersionTap() async {
     if (_isDeveloperModeEnabled) {
       await DeveloperModeService.setEnabled(false);
@@ -426,6 +522,23 @@ class _SettingsScreenState extends State<SettingsScreen> {
     return 'Channel $channelIdx unavailable';
   }
 
+  Future<void> _sendTestFastLocationUpdate() async {
+    final appProvider = context.read<AppProvider>();
+    final sent = await appProvider.sendTestFastLocationUpdate();
+    if (!mounted) return;
+
+    ScaffoldMessenger.of(context).showSnackBar(
+      SnackBar(
+        content: Text(
+          sent
+              ? 'Test fast GPS update sent.'
+              : 'Unable to send test fast GPS update.',
+        ),
+        backgroundColor: sent ? Colors.green : Colors.orange,
+      ),
+    );
+  }
+
   Future<void> _editFastLocationChannel() async {
     final channels =
         List<Contact>.from(context.read<ContactsProvider>().channels)
@@ -1413,6 +1526,90 @@ class _SettingsScreenState extends State<SettingsScreen> {
                 },
               ),
             ),
+            SwitchListTile(
+              secondary: const Icon(Icons.lock_outline),
+              title: const Text('Lock messages to one channel or room'),
+              subtitle: const Text(
+                'Keep the Messages tab and composer fixed on one destination. Direct messages from Contacts still open as usual.',
+              ),
+              value: _messageDestinationLockEnabled,
+              onChanged: (value) async {
+                final contactsProvider = context.read<ContactsProvider>();
+                final options = _messageDestinationLockOptions(
+                  contactsProvider,
+                );
+                final selectedPublicKey =
+                    _selectedMessageDestinationLockValue(options) ??
+                    _publicChannelPublicKeyHex;
+                final selectedContact = options.where((contact) {
+                  return contact.publicKeyHex == selectedPublicKey;
+                }).firstOrNull;
+
+                await _setMessageDestinationLock(
+                  enabled: value,
+                  type: selectedContact == null
+                      ? MessageDestinationPreferences.destinationTypeChannel
+                      : _messageDestinationLockTypeForContact(selectedContact),
+                  recipientPublicKey: selectedPublicKey,
+                );
+              },
+            ),
+            Consumer<ContactsProvider>(
+              builder: (context, contactsProvider, child) {
+                final options = _messageDestinationLockOptions(
+                  contactsProvider,
+                );
+                final selectedValue =
+                    _selectedMessageDestinationLockValue(options);
+
+                return Padding(
+                  padding: const EdgeInsets.fromLTRB(16, 12, 16, 16),
+                  child: DropdownButtonFormField<String>(
+                    key: ValueKey(selectedValue),
+                    initialValue: selectedValue,
+                    isExpanded: true,
+                    decoration: const InputDecoration(
+                      labelText: 'Locked channel or room',
+                      prefixIcon: Icon(Icons.forum_outlined),
+                      border: OutlineInputBorder(),
+                    ),
+                    items: [
+                      for (final contact in options)
+                        DropdownMenuItem<String>(
+                          value: contact.publicKeyHex,
+                          child: Text(
+                            _messageDestinationLockLabel(context, contact),
+                            overflow: TextOverflow.ellipsis,
+                          ),
+                        ),
+                    ],
+                    onChanged:
+                        _messageDestinationLockEnabled && options.isNotEmpty
+                        ? (value) async {
+                            if (value == null) {
+                              return;
+                            }
+
+                            final selectedContact = options.where((contact) {
+                              return contact.publicKeyHex == value;
+                            }).firstOrNull;
+                            if (selectedContact == null) {
+                              return;
+                            }
+
+                            await _setMessageDestinationLock(
+                              enabled: true,
+                              type: _messageDestinationLockTypeForContact(
+                                selectedContact,
+                              ),
+                              recipientPublicKey: value,
+                            );
+                          }
+                        : null,
+                  ),
+                );
+              },
+            ),
             ListTile(
               leading: const Icon(Icons.delete_sweep, color: Colors.red),
               title: const Text(
@@ -1854,6 +2051,15 @@ class _SettingsScreenState extends State<SettingsScreen> {
               trailing: const Icon(Icons.chevron_right),
               onTap: _editFastLocationChannel,
             ),
+            ListTile(
+              leading: const Icon(Icons.send),
+              title: const Text('Test send update'),
+              subtitle: const Text(
+                'Send one fast GPS update immediately to the configured channel.',
+              ),
+              trailing: const Icon(Icons.chevron_right),
+              onTap: _sendTestFastLocationUpdate,
+            ),
             ListTile(
               leading: Icon(Icons.location_on),
               title: Text(AppLocalizations.of(context)!.locationPermission),

lib/services/live_traffic_summary.dart

@@ -3,12 +3,136 @@ import '../utils/log_rx_route_decoder.dart';
 
 enum LiveTrafficBusyness { quiet, active, busy }
 
+class LiveTrafficPacketTypeDetails {
+  final int payloadType;
+  final String title;
+  final String label;
+  final String summary;
+  final String description;
+
+  const LiveTrafficPacketTypeDetails({
+    required this.payloadType,
+    required this.title,
+    required this.label,
+    required this.summary,
+    required this.description,
+  });
+}
+
 class LiveTrafficEntry {
   final BlePacketLog log;
   final DecodedLogRxRoute? route;
 
   const LiveTrafficEntry({required this.log, required this.route});
 
+  static const List<LiveTrafficPacketTypeDetails> _knownPayloadTypes = [
+    LiveTrafficPacketTypeDetails(
+      payloadType: 0x00,
+      title: 'FLOOD REQUEST',
+      label: 'Request',
+      summary: 'Encrypted request to a known peer',
+      description:
+          'Encrypted request to a known peer. The wire payload carries destination and source hashes plus a MAC, and the decrypted body starts with a timestamp followed by application-defined request data such as stats or keepalive requests.',
+    ),
+    LiveTrafficPacketTypeDetails(
+      payloadType: 0x01,
+      title: 'FLOOD RESPONSE',
+      label: 'Response',
+      summary: 'Encrypted reply to a request',
+      description:
+          'Encrypted reply to a Request or Anonymous request. After decryption, the body is application-defined response data with no single generic response envelope.',
+    ),
+    LiveTrafficPacketTypeDetails(
+      payloadType: 0x02,
+      title: 'FLOOD TEXT',
+      label: 'Text message',
+      summary: 'Encrypted direct text with timestamp and retry flags',
+      description:
+          'Encrypted direct text message to a known peer. The decrypted body contains a timestamp, a flags and attempt byte, and the message text.',
+    ),
+    LiveTrafficPacketTypeDetails(
+      payloadType: 0x03,
+      title: 'FLOOD ACK',
+      label: 'Ack',
+      summary: '4-byte acknowledgement for an earlier message',
+      description:
+          'Short acknowledgement proving that a prior message was received. It carries a 4-byte checksum derived from the original message data.',
+    ),
+    LiveTrafficPacketTypeDetails(
+      payloadType: 0x04,
+      title: 'FLOOD ADVERTISEMENT',
+      label: 'Advertisement',
+      summary: 'Signed node identity broadcast',
+      description:
+          'Signed node advertisement announcing a device identity plus app data such as a name or location. Receivers verify the signature before accepting it.',
+    ),
+    LiveTrafficPacketTypeDetails(
+      payloadType: 0x05,
+      title: 'FLOOD GROUP_TEXT',
+      label: 'Group text',
+      summary: 'Encrypted channel text matched by channel hash',
+      description:
+          'Encrypted channel text message. It is matched by the first byte of SHA256(channel secret), then decrypted with the channel key. The plaintext is usually in the form "<sender name>: <message body>".',
+    ),
+    LiveTrafficPacketTypeDetails(
+      payloadType: 0x06,
+      title: 'FLOOD GROUP_DATA',
+      label: 'Group datagram',
+      summary: 'Encrypted channel data with type and length',
+      description:
+          'Encrypted channel datagram. After channel-hash matching and decryption, the body starts with a 16-bit data type and a 1-byte data length before the application payload.',
+    ),
+    LiveTrafficPacketTypeDetails(
+      payloadType: 0x07,
+      title: 'FLOOD ANON_REQUEST',
+      label: 'Anonymous request',
+      summary: 'Request using an ephemeral sender key',
+      description:
+          'Encrypted request to a destination hash without using a stored sender identity. The packet includes the sender\'s ephemeral public key so the receiver can derive the shared secret.',
+    ),
+    LiveTrafficPacketTypeDetails(
+      payloadType: 0x08,
+      title: 'FLOOD RETURNED_PATH',
+      label: 'Returned path',
+      summary:
+          'Return route back to the sender, with optional bundled ACK or response',
+      description:
+          'Path reply sent back to the original author to describe the route a received packet took. MeshCore stores that returned path as the peer\'s direct out-path and can bundle an ACK or response in the same payload.',
+    ),
+    LiveTrafficPacketTypeDetails(
+      payloadType: 0x09,
+      title: 'FLOOD TRACE_PATH',
+      label: 'Trace path',
+      summary: 'Direct trace that records SNR at each hop',
+      description:
+          'Direct diagnostic packet that walks a supplied path and appends one SNR sample per hop. When it reaches the end of the path, the initiator can inspect hop-by-hop link quality.',
+    ),
+    LiveTrafficPacketTypeDetails(
+      payloadType: 0x0A,
+      title: 'FLOOD MULTIPART',
+      label: 'Multipart packet',
+      summary: 'Wrapper for one packet in a multipart sequence',
+      description:
+          'Packet wrapper used when a logical message is split into a sequence. Current MeshCore code uses it for multipart ACKs, where the first nibble says how many parts remain.',
+    ),
+    LiveTrafficPacketTypeDetails(
+      payloadType: 0x0B,
+      title: 'FLOOD CONTROL',
+      label: 'Control packet',
+      summary: 'Discovery or other control data',
+      description:
+          'Control or discovery payload, typically unencrypted. Current documented subtypes are discovery request and response packets used to find nearby nodes and report SNR.',
+    ),
+    LiveTrafficPacketTypeDetails(
+      payloadType: 0x0F,
+      title: 'RAW CUSTOM',
+      label: 'Custom packet',
+      summary: 'Application-defined custom packet',
+      description:
+          'Application-defined raw packet bytes for custom encryption or custom payload formats. MeshCore leaves the inner format up to the higher-level application.',
+    ),
+  ];
+
   bool get isMultiHop => (route?.hopCount ?? 0) > 1;
 
   int? get hopCount => route?.hopCount;
@@ -37,66 +161,39 @@ class LiveTrafficEntry {
         .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${payloadType.toRadixString(16).padLeft(2, '0')}';
+  static List<LiveTrafficPacketTypeDetails> get knownPayloadTypes =>
+      _knownPayloadTypes;
+
+  static LiveTrafficPacketTypeDetails payloadTypeDetails(int payloadType) {
+    for (final details in _knownPayloadTypes) {
+      if (details.payloadType == payloadType) {
+        return details;
+      }
     }
+    return LiveTrafficPacketTypeDetails(
+      payloadType: payloadType,
+      title: '0x${payloadType.toRadixString(16).padLeft(2, '0').toUpperCase()}',
+      label: '0x${payloadType.toRadixString(16).padLeft(2, '0')}',
+      summary: 'Unknown or application-specific protocol payload',
+      description:
+          'Unknown or application-specific packet type. Check the current MeshCore firmware or app-specific protocol docs for the exact payload format.',
+    );
+  }
+
+  static String payloadTypeLabel(int payloadType) {
+    return payloadTypeDetails(payloadType).label;
+  }
+
+  static String payloadTypeTitle(int payloadType) {
+    return payloadTypeDetails(payloadType).title;
   }
 
   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';
-    }
+    return payloadTypeDetails(payloadType).summary;
+  }
+
+  static String payloadTypeDescription(int payloadType) {
+    return payloadTypeDetails(payloadType).description;
   }
 }
 

lib/services/message_destination_preferences.dart

@@ -5,6 +5,12 @@ import 'package:shared_preferences/shared_preferences.dart';
 class MessageDestinationPreferences {
   static const String _destinationTypeKey = 'message_destination_type';
   static const String _recipientPublicKeyKey = 'message_recipient_public_key';
+  static const String _lockedDestinationEnabledKey =
+      'message_locked_destination_enabled';
+  static const String _lockedDestinationTypeKey =
+      'message_locked_destination_type';
+  static const String _lockedRecipientPublicKeyKey =
+      'message_locked_recipient_public_key';
 
   /// Destination types
   static const String destinationTypeAll = 'all';
@@ -12,6 +18,10 @@ class MessageDestinationPreferences {
   static const String destinationTypeContact = 'contact';
   static const String destinationTypeRoom = 'room';
 
+  static bool isLockableDestinationType(String type) {
+    return type == destinationTypeChannel || type == destinationTypeRoom;
+  }
+
   /// Get the saved destination configuration
   /// Returns a map with 'type' and optional 'publicKey'
   /// Returns null if no preference is saved (defaults to public channel)
@@ -53,6 +63,53 @@ class MessageDestinationPreferences {
     await prefs.remove(_recipientPublicKeyKey);
   }
 
+  /// Get the saved locked destination configuration.
+  /// Returns null when the lock is disabled.
+  static Future<Map<String, String>?> getLockedDestination() async {
+    final prefs = await SharedPreferences.getInstance();
+    final isEnabled = prefs.getBool(_lockedDestinationEnabledKey) ?? false;
+
+    if (!isEnabled) {
+      return null;
+    }
+
+    final savedType =
+        prefs.getString(_lockedDestinationTypeKey) ?? destinationTypeChannel;
+    final type = isLockableDestinationType(savedType)
+        ? savedType
+        : destinationTypeChannel;
+    final publicKey = prefs.getString(_lockedRecipientPublicKeyKey);
+
+    return {'type': type, 'publicKey': ?publicKey};
+  }
+
+  static Future<void> setLockedDestination({
+    required bool enabled,
+    String type = destinationTypeChannel,
+    String? recipientPublicKey,
+  }) async {
+    final prefs = await SharedPreferences.getInstance();
+
+    await prefs.setBool(_lockedDestinationEnabledKey, enabled);
+
+    if (!enabled) {
+      await prefs.remove(_lockedDestinationTypeKey);
+      await prefs.remove(_lockedRecipientPublicKeyKey);
+      return;
+    }
+
+    final sanitizedType = isLockableDestinationType(type)
+        ? type
+        : destinationTypeChannel;
+    await prefs.setString(_lockedDestinationTypeKey, sanitizedType);
+
+    if (recipientPublicKey != null) {
+      await prefs.setString(_lockedRecipientPublicKeyKey, recipientPublicKey);
+    } else {
+      await prefs.remove(_lockedRecipientPublicKeyKey);
+    }
+  }
+
   /// Get display name for destination type
   static String getDestinationTypeName(String type) {
     switch (type) {

lib/services/message_storage_service.dart

@@ -58,10 +58,7 @@ class MessageStorageService {
           : jsonList;
 
       final jsonString = jsonEncode(limitedList);
-      await prefs.setString(
-        _key(_messagesKey, namespace: namespace),
-        jsonString,
-      );
+      final messagesKey = _key(_messagesKey, namespace: namespace);
       final retainedMessageIds = limitedList
           .map((entry) => entry['id'] as String)
           .toSet();
@@ -89,22 +86,41 @@ class MessageStorageService {
           routeMetadataJson[entry.key] = entry.value.toJson();
         }
       }
-      await prefs.setString(
-        _key(_messageContactLocationsKey, namespace: namespace),
-        jsonEncode(locationJson),
+      final contactLocationsKey = _key(
+        _messageContactLocationsKey,
+        namespace: namespace,
       );
-      await prefs.setString(
-        _key(_messageReceptionDetailsKey, namespace: namespace),
-        jsonEncode(receptionJson),
+      final receptionDetailsKey = _key(
+        _messageReceptionDetailsKey,
+        namespace: namespace,
       );
-      await prefs.setString(
-        _key(_messageTransferDetailsKey, namespace: namespace),
-        jsonEncode(transferJson),
+      final transferDetailsKey = _key(
+        _messageTransferDetailsKey,
+        namespace: namespace,
       );
-      await prefs.setString(
-        _key(_messageRouteMetadataKey, namespace: namespace),
-        jsonEncode(routeMetadataJson),
+      final routeMetadataKey = _key(
+        _messageRouteMetadataKey,
+        namespace: namespace,
       );
+      final locationJsonString = jsonEncode(locationJson);
+      final receptionJsonString = jsonEncode(receptionJson);
+      final transferJsonString = jsonEncode(transferJson);
+      final routeMetadataJsonString = jsonEncode(routeMetadataJson);
+      final hasChanges =
+          prefs.getString(messagesKey) != jsonString ||
+          prefs.getString(contactLocationsKey) != locationJsonString ||
+          prefs.getString(receptionDetailsKey) != receptionJsonString ||
+          prefs.getString(transferDetailsKey) != transferJsonString ||
+          prefs.getString(routeMetadataKey) != routeMetadataJsonString;
+      if (!hasChanges) {
+        return;
+      }
+
+      await prefs.setString(messagesKey, jsonString);
+      await prefs.setString(contactLocationsKey, locationJsonString);
+      await prefs.setString(receptionDetailsKey, receptionJsonString);
+      await prefs.setString(transferDetailsKey, transferJsonString);
+      await prefs.setString(routeMetadataKey, routeMetadataJsonString);
 
       debugPrint(
         '✅ [MessageStorage] Saved ${limitedList.length} messages to storage',

lib/services/path_history_service.dart

@@ -290,6 +290,17 @@ class PathHistoryService {
         ContactPathHistory.empty(contactPublicKeyHex);
   }
 
+  Future<void> clearHistoryFor(String contactPublicKeyHex) async {
+    await initialize();
+    _cache.remove(contactPublicKeyHex);
+    final prefs = await SharedPreferences.getInstance();
+    final payload = <String, dynamic>{};
+    for (final entry in _cache.entries) {
+      payload[entry.key] = entry.value.toJson();
+    }
+    await prefs.setString(_storageKey, jsonEncode(payload));
+  }
+
   ContactPathHistory _historyFor(String contactPublicKeyHex) {
     return _cache.putIfAbsent(
       contactPublicKeyHex,

lib/widgets/contacts/contact_route_dialog.dart

@@ -10,7 +10,6 @@ import '../../models/path_history.dart';
 import '../../l10n/app_localizations.dart';
 import '../../providers/app_provider.dart';
 import '../../providers/connection_provider.dart';
-import '../../services/contact_route_resolver.dart';
 import '../../services/path_history_service.dart';
 import '../../services/relay_candidate_sorter.dart';
 import '../../services/route_hash_preferences.dart';
@@ -80,7 +79,6 @@ class _ContactRouteDialogState extends State<ContactRouteDialog> {
   ParsedContactRoute? _parsedRoute;
   String? _errorText;
   bool _showRoutingInfo = false;
-  bool _showManualEditor = false;
   List<Contact> _selectedMapHops = const [];
   ContactPathHistory? _pathHistory;
 
@@ -92,7 +90,6 @@ class _ContactRouteDialogState extends State<ContactRouteDialog> {
     );
     _relaySearchController = TextEditingController();
     _controller.addListener(_reparse);
-    _showManualEditor = widget.contact.routeCanonicalText.isNotEmpty;
     _loadHashSizePreference();
     _loadPathHistory();
     _reparse();
@@ -240,19 +237,6 @@ class _ContactRouteDialogState extends State<ContactRouteDialog> {
     });
   }
 
-  void _applyResolvedPlan(ResolvedContactRoutePlan plan) {
-    setState(() {
-      _selectedMapHops = plan.selectedContacts;
-      _controller.text = plan.canonicalText;
-      _controller.selection = TextSelection.fromPosition(
-        TextPosition(offset: _controller.text.length),
-      );
-      _errorText = null;
-      _showManualEditor = false;
-    });
-    _reparse();
-  }
-
   void _applyHistoryRecord(PathRecord record) {
     final canonicalText = _canonicalRouteFromBytes(
       record.pathBytes,
@@ -264,7 +248,6 @@ class _ContactRouteDialogState extends State<ContactRouteDialog> {
         TextPosition(offset: _controller.text.length),
       );
       _errorText = null;
-      _showManualEditor = true;
     });
     _reparse();
   }
@@ -319,39 +302,6 @@ class _ContactRouteDialogState extends State<ContactRouteDialog> {
     );
   }
 
-  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,
@@ -434,32 +384,32 @@ class _ContactRouteDialogState extends State<ContactRouteDialog> {
 
   Widget _buildPreviewSection() {
     final previewRoute = _effectiveRoute;
+    if (previewRoute == null) {
+      return const SizedBox.shrink();
+    }
     final colorScheme = Theme.of(context).colorScheme;
     return Container(
       width: double.infinity,
-      padding: const EdgeInsets.all(14),
+      padding: const EdgeInsets.all(12),
       decoration: BoxDecoration(
         color: colorScheme.surfaceContainerHighest.withValues(alpha: 0.5),
-        borderRadius: BorderRadius.circular(16),
+        borderRadius: BorderRadius.circular(12),
         border: Border.all(color: colorScheme.outlineVariant),
       ),
       child: Column(
         crossAxisAlignment: CrossAxisAlignment.start,
         children: [
           Text(
-            previewRoute == null ? 'Route preview' : previewRoute.summary,
+            previewRoute.summary,
             style: Theme.of(context).textTheme.titleSmall,
           ),
-          const SizedBox(height: 4),
+          const SizedBox(height: 2),
           Text(
-            previewRoute == null
-                ? 'Pick relays from the list below or open manual edit if you need exact hop tokens.'
-                : '${previewRoute.byteLength} bytes • descriptor 0x${previewRoute.encodedPathLen.toRadixString(16).padLeft(2, '0').toUpperCase()}',
+            '${previewRoute.byteLength}B • 0x${previewRoute.encodedPathLen.toRadixString(16).padLeft(2, '0').toUpperCase()}',
             style: Theme.of(context).textTheme.bodySmall,
           ),
-          if (previewRoute != null &&
-              previewRoute.canonicalText.isNotEmpty) ...[
-            const SizedBox(height: 10),
+          if (previewRoute.canonicalText.isNotEmpty) ...[
+            const SizedBox(height: 8),
             SelectableText(
               previewRoute.canonicalText,
               style: Theme.of(
@@ -474,18 +424,7 @@ class _ContactRouteDialogState extends State<ContactRouteDialog> {
 
   Widget _buildSelectedHopSection() {
     if (_selectedMapHops.isEmpty) {
-      return Container(
-        width: double.infinity,
-        padding: const EdgeInsets.all(14),
-        decoration: BoxDecoration(
-          borderRadius: BorderRadius.circular(16),
-          border: Border.all(color: Theme.of(context).dividerColor),
-        ),
-        child: Text(
-          'No relays selected. Save now to use a direct path, or add repeaters below.',
-          style: Theme.of(context).textTheme.bodyMedium,
-        ),
-      );
+      return const SizedBox.shrink();
     }
 
     return Column(
@@ -493,28 +432,21 @@ class _ContactRouteDialogState extends State<ContactRouteDialog> {
       children: [
         Text('Selected relays', style: Theme.of(context).textTheme.titleSmall),
         const SizedBox(height: 8),
-        ..._selectedMapHops.asMap().entries.map((entry) {
-          final index = entry.key;
-          final contact = entry.value;
-          return Card(
-            margin: const EdgeInsets.only(bottom: 8),
-            child: ListTile(
-              leading: CircleAvatar(child: Text('${index + 1}')),
-              title: Text(contact.displayName),
-              subtitle: Text(
-                _tokenFor(contact, _selectedHashSize),
-                style: Theme.of(
-                  context,
-                ).textTheme.bodySmall?.copyWith(fontFamily: 'monospace'),
-              ),
-              trailing: IconButton(
-                tooltip: 'Remove relay',
-                onPressed: () => _toggleHop(contact),
-                icon: const Icon(Icons.close),
-              ),
-            ),
-          );
-        }),
+        Wrap(
+          spacing: 8,
+          runSpacing: 8,
+          children: _selectedMapHops.asMap().entries.map((entry) {
+            final index = entry.key;
+            final contact = entry.value;
+            return InputChip(
+              label: Text('${index + 1}. ${contact.displayName}'),
+              deleteIcon: const Icon(Icons.close),
+              onDeleted: () => _toggleHop(contact),
+              materialTapTargetSize: MaterialTapTargetSize.shrinkWrap,
+              visualDensity: VisualDensity.compact,
+            );
+          }).toList(),
+        ),
       ],
     );
   }
@@ -563,6 +495,12 @@ class _ContactRouteDialogState extends State<ContactRouteDialog> {
             return Card(
               margin: const EdgeInsets.only(bottom: 8),
               child: ListTile(
+                dense: true,
+                visualDensity: VisualDensity.compact,
+                contentPadding: const EdgeInsets.symmetric(
+                  horizontal: 16,
+                  vertical: 4,
+                ),
                 leading: Icon(
                   isSelected
                       ? Icons.check_circle
@@ -593,41 +531,6 @@ class _ContactRouteDialogState extends State<ContactRouteDialog> {
     );
   }
 
-  Widget _buildManualEditor() {
-    return ExpansionTile(
-      tilePadding: EdgeInsets.zero,
-      childrenPadding: EdgeInsets.zero,
-      initiallyExpanded: _showManualEditor,
-      onExpansionChanged: (expanded) {
-        setState(() {
-          _showManualEditor = expanded;
-        });
-      },
-      title: Text(AppLocalizations.of(context)!.manualRouteEdit),
-      subtitle: const Text(
-        'Use this when you need to paste or tweak hop tokens directly.',
-      ),
-      children: [
-        TextField(
-          controller: _controller,
-          textCapitalization: TextCapitalization.characters,
-          decoration: InputDecoration(
-            labelText: 'Route',
-            hintText: _selectedHashSize == 1
-                ? 'AA,BB,CC'
-                : _selectedHashSize == 2
-                ? 'AABB,CCDD'
-                : 'AABBCC,DDEEFF',
-            helperText:
-                'Comma-separated hops using the selected path size. Colon form like AA:BB is also accepted.',
-            errorText: _errorText,
-            border: const OutlineInputBorder(),
-          ),
-        ),
-      ],
-    );
-  }
-
   Widget _buildMapPreview({
     required List<Contact> routeCandidates,
     required List<LatLng> mapPoints,
@@ -709,15 +612,14 @@ class _ContactRouteDialogState extends State<ContactRouteDialog> {
 
   Widget _buildBuilderTab({
     required List<Contact> routeCandidates,
-    required List<LatLng> mapPoints,
-    required List<LatLng> routePoints,
   }) {
     return Column(
       crossAxisAlignment: CrossAxisAlignment.start,
       children: [
         Row(
+          crossAxisAlignment: CrossAxisAlignment.center,
           children: [
-            Text('Path Size', style: Theme.of(context).textTheme.labelLarge),
+            Text('Path size', style: Theme.of(context).textTheme.labelLarge),
             const Spacer(),
             SegmentedButton<int>(
               segments: [
@@ -734,36 +636,32 @@ class _ContactRouteDialogState extends State<ContactRouteDialog> {
             ),
           ],
         ),
+        if (_errorText != null) ...[
+          const SizedBox(height: 12),
+          Text(
+            _errorText!,
+            style: TextStyle(color: Theme.of(context).colorScheme.error),
+          ),
+        ],
+        if (_selectedMapHops.isNotEmpty) ...[
+          const SizedBox(height: 12),
+          _buildSelectedHopSection(),
+        ],
         const SizedBox(height: 12),
-        Wrap(
-          spacing: 8,
-          runSpacing: 8,
-          children: [
-            FilledButton.tonalIcon(
-              onPressed: _resolvePathAutomatically,
-              icon: Icon(Icons.auto_fix_high),
-              label: Text(AppLocalizations.of(context)!.autoResolve),
-            ),
-            OutlinedButton.icon(
-              onPressed: _selectedMapHops.isEmpty
-                  ? null
-                  : () {
-                      setState(() {
-                        _selectedMapHops = const [];
-                        _syncControllerFromSelectedHops();
-                      });
-                    },
-              icon: Icon(Icons.clear_all),
-              label: Text(AppLocalizations.of(context)!.clearRelays),
-            ),
-          ],
-        ),
-        const SizedBox(height: 16),
-        _buildPreviewSection(),
-        const SizedBox(height: 16),
-        _buildSelectedHopSection(),
-        const SizedBox(height: 16),
         _buildRelayPicker(routeCandidates),
+      ],
+    );
+  }
+
+  Widget _buildInfoTab({
+    required AppProvider appProvider,
+    required List<Contact> routeCandidates,
+    required List<LatLng> mapPoints,
+    required List<LatLng> routePoints,
+  }) {
+    return ListView(
+      children: [
+        _buildPreviewSection(),
         const SizedBox(height: 16),
         _buildMapPreview(
           routeCandidates: routeCandidates,
@@ -771,7 +669,18 @@ class _ContactRouteDialogState extends State<ContactRouteDialog> {
           routePoints: routePoints,
         ),
         const SizedBox(height: 16),
-        _buildManualEditor(),
+        _AutomationRoutingInfo(
+          isExpanded: _showRoutingInfo,
+          onToggle: () {
+            setState(() {
+              _showRoutingInfo = !_showRoutingInfo;
+            });
+          },
+          autoRouteRotationEnabled: appProvider.autoRouteRotationEnabled,
+          nearestRelayFallbackEnabled: appProvider.nearestRelayFallbackEnabled,
+          clearPathOnMaxRetry: appProvider.clearPathOnMaxRetry,
+        ),
+        const SizedBox(height: 24),
       ],
     );
   }
@@ -808,6 +717,24 @@ class _ContactRouteDialogState extends State<ContactRouteDialog> {
     return Column(
       crossAxisAlignment: CrossAxisAlignment.start,
       children: [
+        Align(
+          alignment: Alignment.centerRight,
+          child: TextButton(
+            onPressed: () async {
+              await _pathHistoryService.clearHistoryFor(
+                widget.contact.publicKeyHex,
+              );
+              if (!mounted) return;
+              setState(() {
+                _pathHistory = _pathHistoryService.historyFor(
+                  widget.contact.publicKeyHex,
+                );
+              });
+            },
+            child: const Text('Clear history'),
+          ),
+        ),
+        const SizedBox(height: 8),
         if (observedRecord != null) ...[
           _buildHistoryRecordTile(observedRecord, title: AppLocalizations.of(context)!.observedMeshRoute),
           const SizedBox(height: 16),
@@ -877,7 +804,7 @@ class _ContactRouteDialogState extends State<ContactRouteDialog> {
     ];
 
     return DefaultTabController(
-      length: 2,
+      length: 3,
       child: Scaffold(
         appBar: AppBar(
           title: Text('Set Path for ${widget.contact.displayName}'),
@@ -885,56 +812,34 @@ class _ContactRouteDialogState extends State<ContactRouteDialog> {
             tabs: [
               Tab(text: 'Build'),
               Tab(text: 'History'),
+              Tab(text: 'Info'),
             ],
           ),
         ),
         body: SafeArea(
           child: Padding(
             padding: const EdgeInsets.fromLTRB(16, 16, 16, 0),
-            child: Column(
-              crossAxisAlignment: CrossAxisAlignment.start,
+            child: TabBarView(
               children: [
-                Text(
-                  'Plan the route on its own screen, then save it once the preview looks right.',
-                  style: Theme.of(context).textTheme.bodyMedium,
+                ListView(
+                  children: [
+                    _buildBuilderTab(
+                      routeCandidates: routeCandidates,
+                    ),
+                    const SizedBox(height: 24),
+                  ],
                 ),
-                const SizedBox(height: 16),
-                Expanded(
-                  child: TabBarView(
-                    children: [
-                      ListView(
-                        children: [
-                          _buildBuilderTab(
-                            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,
-                          ),
-                          const SizedBox(height: 24),
-                        ],
-                      ),
-                      ListView(
-                        children: [
-                          _buildHistoryTab(),
-                          const SizedBox(height: 24),
-                        ],
-                      ),
-                    ],
-                  ),
+                ListView(
+                  children: [
+                    _buildHistoryTab(),
+                    const SizedBox(height: 24),
+                  ],
+                ),
+                _buildInfoTab(
+                  appProvider: appProvider,
+                  routeCandidates: routeCandidates,
+                  mapPoints: mapPoints,
+                  routePoints: routePoints,
                 ),
               ],
             ),

lib/widgets/contacts/contact_tile.dart

@@ -11,6 +11,7 @@ import '../../providers/contacts_provider.dart';
 import '../../providers/map_provider.dart';
 import '../../providers/messages_provider.dart';
 import '../../providers/sensors_provider.dart';
+import '../../services/location_tracking_service.dart';
 import '../../services/message_destination_preferences.dart';
 import 'contact_route_dialog.dart';
 import 'contact_trace_sheet.dart';
@@ -529,6 +530,16 @@ class ContactTile extends StatelessWidget {
             _showNeighbours(context, contact);
           },
         ),
+      if (contact.type == ContactType.repeater ||
+          contact.type == ContactType.room)
+        _ContactSheetAction(
+          icon: Icons.network_ping,
+          label: 'Ping',
+          onTap: () async {
+            Navigator.pop(context);
+            _pingRelay(context, contact);
+          },
+        ),
       if (!contact.isPublicChannel)
         _ContactSheetAction(
           icon: Icons.edit_outlined,
@@ -664,6 +675,18 @@ class ContactTile extends StatelessWidget {
     );
   }
 
+  void _pingRelay(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) => _PingRelaySheet(contact: contact),
+    );
+  }
+
   void _showDeleteConfirmation(
     BuildContext context,
     Contact contact, {
@@ -1839,16 +1862,24 @@ class _NeighboursSheetState extends State<_NeighboursSheet> {
         final parts = trimmed.split(':');
         if (parts.length >= 3) {
           final keyHex = parts[0];
-          final timestampOrMs = int.tryParse(parts[1]);
+          final timestampOrSeconds = int.tryParse(parts[1]);
           final snrRaw = int.tryParse(parts[2]);
-          final isMs = timestampOrMs != null && timestampOrMs < 1e9;
+          final isDurationSeconds =
+              timestampOrSeconds != null && timestampOrSeconds < 1000000000;
           parsed.add(
             _Neighbour(
               publicKeyHex: keyHex,
-              lastSeenAt: !isMs && timestampOrMs != null
-                  ? DateTime.fromMillisecondsSinceEpoch(timestampOrMs * 1000)
+              lastSeenAt: !isDurationSeconds && timestampOrSeconds != null
+                  ? timestampOrSeconds >= 1000000000000
+                        ? DateTime.fromMillisecondsSinceEpoch(
+                            timestampOrSeconds,
+                          )
+                        : DateTime.fromMillisecondsSinceEpoch(
+                            timestampOrSeconds * 1000,
+                          )
                   : null,
-              lastSeenMs: isMs ? timestampOrMs : null,
+              lastSeenSeconds:
+                  isDurationSeconds ? timestampOrSeconds : null,
               snrDb: snrRaw != null ? snrRaw / 4.0 : null,
             ),
           );
@@ -1896,12 +1927,12 @@ class _NeighboursSheetState extends State<_NeighboursSheet> {
           .difference(neighbour.lastSeenAt!)
           .toLocalizedTimeAgoWithSeconds(context);
     }
-    if (neighbour.lastSeenMs != null) {
-      if (neighbour.lastSeenMs! < 1000) {
+    if (neighbour.lastSeenSeconds != null) {
+      if (neighbour.lastSeenSeconds! < 1) {
         return AppLocalizations.of(context)!.justNow;
       }
       return Duration(
-        milliseconds: neighbour.lastSeenMs!,
+        seconds: neighbour.lastSeenSeconds!,
       ).toLocalizedTimeAgoWithSeconds(context);
     }
     return AppLocalizations.of(context)!.justNow;
@@ -2295,13 +2326,13 @@ class _NeighboursSheetState extends State<_NeighboursSheet> {
 class _Neighbour {
   final String publicKeyHex;
   final DateTime? lastSeenAt;
-  final int? lastSeenMs;
+  final int? lastSeenSeconds;
   final double? snrDb;
 
   const _Neighbour({
     required this.publicKeyHex,
     this.lastSeenAt,
-    this.lastSeenMs,
+    this.lastSeenSeconds,
     this.snrDb,
   });
 }
@@ -2317,3 +2348,337 @@ class _MappedNeighbour {
     required this.location,
   });
 }
+
+/// Bottom sheet for pinging a relay/repeater with history and distance.
+class _PingRelaySheet extends StatefulWidget {
+  final Contact contact;
+
+  const _PingRelaySheet({required this.contact});
+
+  @override
+  State<_PingRelaySheet> createState() => _PingRelaySheetState();
+}
+
+class _PingEntry {
+  final RelayPingResult result;
+  final DateTime timestamp;
+  final String? distance;
+
+  const _PingEntry({
+    required this.result,
+    required this.timestamp,
+    this.distance,
+  });
+}
+
+class _PingRelaySheetState extends State<_PingRelaySheet> {
+  bool _pinging = false;
+  final List<_PingEntry> _history = [];
+
+  @override
+  void initState() {
+    super.initState();
+    _doPing();
+  }
+
+  Future<void> _doPing() async {
+    setState(() => _pinging = true);
+    final connectionProvider = context.read<ConnectionProvider>();
+    final distance = _distanceText();
+    final result = await connectionProvider.pingRelay(widget.contact);
+    if (!mounted) return;
+    setState(() {
+      _pinging = false;
+      _history.insert(
+        0,
+        _PingEntry(
+          result: result,
+          timestamp: DateTime.now(),
+          distance: distance,
+        ),
+      );
+    });
+  }
+
+  String? _distanceText() {
+    final location = widget.contact.displayLocation;
+    if (location == null) return null;
+    final currentPosition = LocationTrackingService().currentPosition;
+    if (currentPosition == null) return null;
+    final meters = Geolocator.distanceBetween(
+      currentPosition.latitude,
+      currentPosition.longitude,
+      location.latitude,
+      location.longitude,
+    );
+    if (meters < 1000) return '${meters.round()} m';
+    if (meters < 10000) return '${(meters / 1000).toStringAsFixed(2)} km';
+    return '${(meters / 1000).toStringAsFixed(1)} km';
+  }
+
+  Widget _buildPill(
+    BuildContext context, {
+    required IconData icon,
+    required String label,
+    Color? iconColor,
+  }) {
+    final colorScheme = Theme.of(context).colorScheme;
+    return Container(
+      padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 4),
+      decoration: BoxDecoration(
+        color: colorScheme.surfaceContainerHighest.withValues(alpha: 0.75),
+        borderRadius: BorderRadius.circular(999),
+      ),
+      child: Row(
+        mainAxisSize: MainAxisSize.min,
+        children: [
+          Icon(icon, size: 12, color: iconColor ?? colorScheme.onSurfaceVariant),
+          const SizedBox(width: 4),
+          Text(
+            label,
+            style: Theme.of(context).textTheme.labelSmall?.copyWith(
+              color: colorScheme.onSurfaceVariant,
+              fontWeight: FontWeight.w700,
+            ),
+          ),
+        ],
+      ),
+    );
+  }
+
+  Widget _buildSnrPill(BuildContext context, String direction, double snrDb) {
+    final quality = linkQualityLabel(null, snrDb);
+    final color = linkQualityColor(quality);
+    return Container(
+      padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 4),
+      decoration: BoxDecoration(
+        color: color.withValues(alpha: 0.15),
+        borderRadius: BorderRadius.circular(999),
+      ),
+      child: Row(
+        mainAxisSize: MainAxisSize.min,
+        children: [
+          Icon(
+            direction == 'there'
+                ? Icons.arrow_upward_rounded
+                : Icons.arrow_downward_rounded,
+            size: 12,
+            color: color,
+          ),
+          const SizedBox(width: 4),
+          Text(
+            '${snrDb.toStringAsFixed(1)} dB',
+            style: Theme.of(context).textTheme.labelSmall?.copyWith(
+              color: color,
+              fontWeight: FontWeight.w700,
+            ),
+          ),
+        ],
+      ),
+    );
+  }
+
+  Widget _buildResultRow(BuildContext context, _PingEntry entry, int seq) {
+    final theme = Theme.of(context);
+    final colorScheme = theme.colorScheme;
+    final r = entry.result;
+    final age = DateTime.now().difference(entry.timestamp);
+    final timeAgo = age.toLocalizedTimeAgoWithSeconds(context);
+
+    if (!r.success) {
+      return Padding(
+        padding: const EdgeInsets.symmetric(vertical: 8),
+        child: Row(
+          children: [
+            CircleAvatar(
+              radius: 12,
+              backgroundColor: colorScheme.error.withValues(alpha: 0.15),
+              child: Text(
+                '$seq',
+                style: TextStyle(
+                  color: colorScheme.error,
+                  fontSize: 10,
+                  fontWeight: FontWeight.bold,
+                ),
+              ),
+            ),
+            const SizedBox(width: 10),
+            Text(
+              'Timeout',
+              style: theme.textTheme.bodySmall?.copyWith(
+                color: colorScheme.error,
+                fontWeight: FontWeight.w600,
+              ),
+            ),
+            const Spacer(),
+            Text(
+              timeAgo,
+              style: theme.textTheme.labelSmall?.copyWith(
+                color: colorScheme.onSurfaceVariant.withValues(alpha: 0.6),
+              ),
+            ),
+          ],
+        ),
+      );
+    }
+
+    return Padding(
+      padding: const EdgeInsets.symmetric(vertical: 6),
+      child: Column(
+        crossAxisAlignment: CrossAxisAlignment.start,
+        children: [
+          Row(
+            children: [
+              CircleAvatar(
+                radius: 12,
+                backgroundColor: colorScheme.surfaceContainerHighest,
+                child: Text(
+                  '$seq',
+                  style: TextStyle(
+                    color: colorScheme.onSurfaceVariant,
+                    fontSize: 10,
+                    fontWeight: FontWeight.bold,
+                  ),
+                ),
+              ),
+              const SizedBox(width: 10),
+              _buildPill(
+                context,
+                icon: Icons.timer_outlined,
+                label: '${r.durationMs} ms',
+              ),
+              const SizedBox(width: 6),
+              _buildSnrPill(context, 'there', r.snrThere),
+              const SizedBox(width: 6),
+              _buildSnrPill(context, 'back', r.snrBack),
+            ],
+          ),
+          Padding(
+            padding: const EdgeInsets.only(left: 34, top: 4),
+            child: Row(
+              children: [
+                if (entry.distance != null) ...[
+                  Icon(Icons.straighten, size: 10,
+                    color: colorScheme.onSurfaceVariant.withValues(alpha: 0.5)),
+                  const SizedBox(width: 3),
+                  Text(
+                    entry.distance!,
+                    style: theme.textTheme.labelSmall?.copyWith(
+                      color: colorScheme.onSurfaceVariant.withValues(alpha: 0.6),
+                      fontSize: 10,
+                    ),
+                  ),
+                  const SizedBox(width: 8),
+                ],
+                Icon(Icons.schedule, size: 10,
+                  color: colorScheme.onSurfaceVariant.withValues(alpha: 0.5)),
+                const SizedBox(width: 3),
+                Text(
+                  timeAgo,
+                  style: theme.textTheme.labelSmall?.copyWith(
+                    color: colorScheme.onSurfaceVariant.withValues(alpha: 0.6),
+                    fontSize: 10,
+                  ),
+                ),
+              ],
+            ),
+          ),
+        ],
+      ),
+    );
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    final theme = Theme.of(context);
+    final colorScheme = theme.colorScheme;
+    final displayName = widget.contact.displayName;
+
+    return SafeArea(
+      child: Padding(
+        padding: const EdgeInsets.fromLTRB(16, 12, 16, 16),
+        child: Column(
+          mainAxisSize: MainAxisSize.min,
+          crossAxisAlignment: CrossAxisAlignment.start,
+          children: [
+            Center(
+              child: Container(
+                width: 40,
+                height: 4,
+                decoration: BoxDecoration(
+                  color: theme.dividerColor,
+                  borderRadius: BorderRadius.circular(2),
+                ),
+              ),
+            ),
+            const SizedBox(height: 14),
+            Row(
+              children: [
+                Expanded(
+                  child: Text(
+                    'Ping $displayName',
+                    style: theme.textTheme.titleLarge,
+                  ),
+                ),
+                if (_history.isNotEmpty)
+                  IconButton(
+                    onPressed: () => setState(() => _history.clear()),
+                    icon: const Icon(Icons.delete_outline, size: 20),
+                    tooltip: 'Clear history',
+                    style: IconButton.styleFrom(
+                      foregroundColor: colorScheme.onSurfaceVariant,
+                    ),
+                  ),
+                FilledButton.icon(
+                  onPressed: _pinging ? null : _doPing,
+                  icon: _pinging
+                      ? SizedBox(
+                          width: 16,
+                          height: 16,
+                          child: CircularProgressIndicator(
+                            strokeWidth: 2,
+                            color: colorScheme.onPrimary,
+                          ),
+                        )
+                      : const Icon(Icons.network_ping, size: 18),
+                  label: Text(_pinging ? 'Pinging...' : 'Ping Again'),
+                ),
+              ],
+            ),
+            const SizedBox(height: 16),
+            if (_history.isEmpty && _pinging)
+              const Padding(
+                padding: EdgeInsets.symmetric(vertical: 24),
+                child: Center(child: CircularProgressIndicator()),
+              )
+            else if (_history.isEmpty)
+              Padding(
+                padding: const EdgeInsets.symmetric(vertical: 24),
+                child: Center(
+                  child: Text(
+                    'No results yet',
+                    style: theme.textTheme.bodyMedium,
+                  ),
+                ),
+              )
+            else
+              ConstrainedBox(
+                constraints: const BoxConstraints(maxHeight: 300),
+                child: ListView.separated(
+                  shrinkWrap: true,
+                  itemCount: _history.length,
+                  separatorBuilder: (_, _) =>
+                      Divider(height: 1, color: colorScheme.outlineVariant.withValues(alpha: 0.3)),
+                  itemBuilder: (context, index) {
+                    final entry = _history[index];
+                    final seq = _history.length - index;
+                    return _buildResultRow(context, entry, seq);
+                  },
+                ),
+              ),
+          ],
+        ),
+      ),
+    );
+  }
+}

lib/widgets/messages/messages_composer.dart

@@ -19,6 +19,7 @@ class MessagesComposer extends StatelessWidget {
   final double bottomPadding;
   final String destinationLabel;
   final Widget destinationAvatar;
+  final bool destinationLocked;
   final List<Contact> mentionSuggestions;
   final String mentionQuery;
   final ValueChanged<Contact> onMentionSelected;
@@ -27,6 +28,7 @@ class MessagesComposer extends StatelessWidget {
   final Future<void> Function() onStartVoiceRecording;
   final Future<void> Function() onStopAndSendVoice;
   final Future<void> Function() onSendMessage;
+  final VoidCallback? onLongPressSend;
   final String? regionScopeName;
   final VoidCallback? onRegionScopeTap;
 
@@ -43,6 +45,7 @@ class MessagesComposer extends StatelessWidget {
     required this.bottomPadding,
     required this.destinationLabel,
     required this.destinationAvatar,
+    required this.destinationLocked,
     required this.mentionSuggestions,
     required this.mentionQuery,
     required this.onMentionSelected,
@@ -51,6 +54,7 @@ class MessagesComposer extends StatelessWidget {
     required this.onStartVoiceRecording,
     required this.onStopAndSendVoice,
     required this.onSendMessage,
+    this.onLongPressSend,
     this.regionScopeName,
     this.onRegionScopeTap,
   });
@@ -116,10 +120,13 @@ class MessagesComposer extends StatelessWidget {
                           ],
                           const SizedBox(width: 8),
                           Expanded(
-                            child: _DestinationSelector(
+                            child: _DestinationPill(
                               destinationLabel: destinationLabel,
                               destinationAvatar: destinationAvatar,
-                              onTap: onShowRecipientSelector,
+                              isLocked: destinationLocked,
+                              onTap: destinationLocked
+                                  ? null
+                                  : onShowRecipientSelector,
                             ),
                           ),
                         ],
@@ -163,6 +170,7 @@ class MessagesComposer extends StatelessWidget {
                                 messageByteCount: messageByteCount,
                                 maxMessageBytes: maxMessageBytes,
                                 onSendMessage: onSendMessage,
+                                onLongPressSend: onLongPressSend,
                                 onStartVoiceRecording: onStartVoiceRecording,
                                 onStopAndSendVoice: onStopAndSendVoice,
                               ),
@@ -294,59 +302,73 @@ class _ComposerActionButton extends StatelessWidget {
   }
 }
 
-class _DestinationSelector extends StatelessWidget {
+class _DestinationPill extends StatelessWidget {
   final String destinationLabel;
   final Widget destinationAvatar;
-  final VoidCallback onTap;
+  final bool isLocked;
+  final VoidCallback? onTap;
 
-  const _DestinationSelector({
+  const _DestinationPill({
     required this.destinationLabel,
     required this.destinationAvatar,
-    required this.onTap,
+    required this.isLocked,
+    this.onTap,
   });
 
   @override
   Widget build(BuildContext context) {
+    final content = Ink(
+      key: ValueKey(
+        isLocked
+            ? 'messages_composer_destination_locked'
+            : 'messages_composer_destination_selector',
+      ),
+      height: 40,
+      decoration: BoxDecoration(
+        color: Theme.of(context).colorScheme.surface,
+        borderRadius: BorderRadius.circular(20),
+        border: Border.all(
+          color: Theme.of(context).dividerColor.withValues(alpha: 0.35),
+        ),
+      ),
+      child: Padding(
+        padding: const EdgeInsets.symmetric(horizontal: 12),
+        child: Row(
+          children: [
+            destinationAvatar,
+            const SizedBox(width: 8),
+            Expanded(
+              child: Text(
+                destinationLabel,
+                overflow: TextOverflow.ellipsis,
+                style: TextStyle(
+                  fontSize: 14,
+                  fontWeight: FontWeight.w600,
+                  color: Theme.of(context).colorScheme.onSurface,
+                ),
+              ),
+            ),
+            if (!isLocked)
+              Icon(
+                Icons.expand_more_rounded,
+                size: 18,
+                color: Theme.of(context).colorScheme.onSurfaceVariant,
+              ),
+          ],
+        ),
+      ),
+    );
+
+    if (onTap == null) {
+      return Material(color: Colors.transparent, child: content);
+    }
+
     return Material(
       color: Colors.transparent,
       child: InkWell(
         borderRadius: BorderRadius.circular(20),
         onTap: onTap,
-        child: Ink(
-          height: 40,
-          decoration: BoxDecoration(
-            color: Theme.of(context).colorScheme.surface,
-            borderRadius: BorderRadius.circular(20),
-            border: Border.all(
-              color: Theme.of(context).dividerColor.withValues(alpha: 0.35),
-            ),
-          ),
-          child: Padding(
-            padding: const EdgeInsets.symmetric(horizontal: 12),
-            child: Row(
-              children: [
-                destinationAvatar,
-                const SizedBox(width: 8),
-                Expanded(
-                  child: Text(
-                    destinationLabel,
-                    overflow: TextOverflow.ellipsis,
-                    style: TextStyle(
-                      fontSize: 14,
-                      fontWeight: FontWeight.w600,
-                      color: Theme.of(context).colorScheme.onSurface,
-                    ),
-                  ),
-                ),
-                Icon(
-                  Icons.expand_more_rounded,
-                  size: 18,
-                  color: Theme.of(context).colorScheme.onSurfaceVariant,
-                ),
-              ],
-            ),
-          ),
-        ),
+        child: content,
       ),
     );
   }
@@ -433,6 +455,7 @@ class _SendButton extends StatelessWidget {
   final int messageByteCount;
   final int maxMessageBytes;
   final Future<void> Function() onSendMessage;
+  final VoidCallback? onLongPressSend;
   final Future<void> Function() onStartVoiceRecording;
   final Future<void> Function() onStopAndSendVoice;
 
@@ -445,6 +468,7 @@ class _SendButton extends StatelessWidget {
     required this.messageByteCount,
     required this.maxMessageBytes,
     required this.onSendMessage,
+    this.onLongPressSend,
     required this.onStartVoiceRecording,
     required this.onStopAndSendVoice,
   });
@@ -456,28 +480,32 @@ class _SendButton extends StatelessWidget {
       enabled: canSendText || (voiceSupported && !isSendingVoice),
       label: semanticsLabel,
       onTap: canSendText ? onSendMessage : null,
-      onLongPress: (voiceSupported && !isSendingVoice)
-          ? () {
-              if (isRecording) {
-                onStopAndSendVoice();
-                return;
-              }
-              onStartVoiceRecording();
-            }
-          : null,
+      onLongPress: canSendText && onLongPressSend != null
+          ? onLongPressSend
+          : (voiceSupported && !isSendingVoice)
+              ? () {
+                  if (isRecording) {
+                    onStopAndSendVoice();
+                    return;
+                  }
+                  onStartVoiceRecording();
+                }
+              : null,
       child: Tooltip(
         message: semanticsLabel,
         excludeFromSemantics: true,
         child: GestureDetector(
           excludeFromSemantics: true,
           onTap: canSendText ? onSendMessage : null,
-          onLongPressStart: (voiceSupported && !isSendingVoice)
-              ? (_) => onStartVoiceRecording()
-              : null,
-          onLongPressEnd: (voiceSupported && isRecording)
+          onLongPressStart: canSendText && onLongPressSend != null
+              ? (_) => onLongPressSend!()
+              : (voiceSupported && !isSendingVoice)
+                  ? (_) => onStartVoiceRecording()
+                  : null,
+          onLongPressEnd: (!canSendText && voiceSupported && isRecording)
               ? (_) => onStopAndSendVoice()
               : null,
-          onLongPressCancel: (voiceSupported && isRecording)
+          onLongPressCancel: (!canSendText && voiceSupported && isRecording)
               ? onStopAndSendVoice
               : null,
           child: Column(

lib/widgets/sensors/sensor_telemetry_card.dart

@@ -29,6 +29,31 @@ class SensorMetricOption {
   });
 }
 
+const Set<String> _imperialMeasurementCountries = <String>{
+  'US',
+  'LR',
+  'MM',
+};
+
+bool _usesImperialSpeedUnits() {
+  final countryCode =
+      WidgetsBinding.instance.platformDispatcher.locale.countryCode;
+  if (countryCode == null || countryCode.isEmpty) {
+    return false;
+  }
+  return _imperialMeasurementCountries.contains(countryCode.toUpperCase());
+}
+
+String _formatPreviewSpeed(num metersPerSecond) {
+  if (_usesImperialSpeedUnits()) {
+    final milesPerHour = metersPerSecond * 2.2369362920544;
+    return '${_formatPreviewNumber(milesPerHour, maxFractionDigits: 2)} mph';
+  }
+
+  final kilometersPerHour = metersPerSecond * 3.6;
+  return '${_formatPreviewNumber(kilometersPerHour, maxFractionDigits: 2)} km/h';
+}
+
 List<SensorMetricOption> sensorMetricOptionsFor(
   Contact? contact, {
   Map<String, String> labelOverrides = const <String, String>{},
@@ -795,17 +820,17 @@ String? _sensorMetricPreviewValue(String rawKey, dynamic value) {
     case 'speed':
       final metersPerSecond = _previewAsDouble(value);
       if (metersPerSecond == null) return null;
-      return '${_formatPreviewNumber(metersPerSecond, maxFractionDigits: 2)} m/s';
+      return _formatPreviewSpeed(metersPerSecond);
 
     case 'signed_speed':
       final metersPerSecond = _previewAsDouble(value);
       if (metersPerSecond == null) return null;
-      return '${_formatPreviewNumber(metersPerSecond, maxFractionDigits: 2)} m/s';
+      return _formatPreviewSpeed(metersPerSecond);
 
     case 'gust':
       final metersPerSecond = _previewAsDouble(value);
       if (metersPerSecond == null) return null;
-      return '${_formatPreviewNumber(metersPerSecond, maxFractionDigits: 2)} m/s';
+      return _formatPreviewSpeed(metersPerSecond);
 
     case 'dew':
       final degreesCelsius = _previewAsDouble(value);
@@ -1066,6 +1091,16 @@ class SensorTelemetryCard extends StatelessWidget {
     this.labelOverrides = const <String, String>{},
   });
 
+  String _formatSpeed(num metersPerSecond) {
+    if (_usesImperialSpeedUnits()) {
+      final milesPerHour = metersPerSecond * 2.2369362920544;
+      return '${_formatNumber(milesPerHour, maxFractionDigits: 2)} mph';
+    }
+
+    final kilometersPerHour = metersPerSecond * 3.6;
+    return '${_formatNumber(kilometersPerHour, maxFractionDigits: 2)} km/h';
+  }
+
   bool get _showsMenu =>
       onRefresh != null ||
       onCustomize != null ||
@@ -1759,7 +1794,7 @@ class SensorTelemetryCard extends StatelessWidget {
           fieldKey: _extraFieldKey(rawKey),
           icon: Icons.air,
           label: label,
-          value: '${_formatNumber(metersPerSecond, maxFractionDigits: 2)} m/s',
+          value: _formatSpeed(metersPerSecond),
           accent: const Color(0xFF2B78A0),
           channel: metricKey.channel,
         );
@@ -1771,7 +1806,7 @@ class SensorTelemetryCard extends StatelessWidget {
           fieldKey: _extraFieldKey(rawKey),
           icon: Icons.air,
           label: label,
-          value: '${_formatNumber(metersPerSecond, maxFractionDigits: 2)} m/s',
+          value: _formatSpeed(metersPerSecond),
           accent: const Color(0xFF2B78A0),
           channel: metricKey.channel,
         );
@@ -1783,7 +1818,7 @@ class SensorTelemetryCard extends StatelessWidget {
           fieldKey: _extraFieldKey(rawKey),
           icon: Icons.air,
           label: label,
-          value: '${_formatNumber(metersPerSecond, maxFractionDigits: 2)} m/s',
+          value: _formatSpeed(metersPerSecond),
           accent: const Color(0xFF1E88A8),
           channel: metricKey.channel,
         );
@@ -2252,7 +2287,7 @@ class _InlineAlertBadge extends StatelessWidget {
   }
 }
 
-class SensorMetricTile extends StatelessWidget {
+class SensorMetricTile extends StatefulWidget {
   final SensorMetricCardData data;
   final double width;
   final String keyPrefix;
@@ -2268,8 +2303,43 @@ class SensorMetricTile extends StatelessWidget {
     this.onLongPress,
   });
 
+  @override
+  State<SensorMetricTile> createState() => _SensorMetricTileState();
+}
+
+class _SensorMetricTileState extends State<SensorMetricTile> {
+  final flutter_map.MapController _previewMapController =
+      flutter_map.MapController();
+
+  @override
+  void didUpdateWidget(covariant SensorMetricTile oldWidget) {
+    super.didUpdateWidget(oldWidget);
+    final previousLocation = oldWidget.data.mapLocation;
+    final nextLocation = widget.data.mapLocation;
+    if (!_sameMapLocation(previousLocation, nextLocation) &&
+        nextLocation != null &&
+        widget.allowMapPreview) {
+      WidgetsBinding.instance.addPostFrameCallback((_) {
+        if (!mounted) {
+          return;
+        }
+        _previewMapController.move(
+          nextLocation,
+          _previewMapController.camera.zoom,
+        );
+      });
+    }
+  }
+
+  bool _sameMapLocation(LatLng? a, LatLng? b) {
+    if (a == null || b == null) {
+      return a == b;
+    }
+    return a.latitude == b.latitude && a.longitude == b.longitude;
+  }
+
   Future<void> _showExpandedMap(BuildContext context) async {
-    final location = data.mapLocation;
+    final location = widget.data.mapLocation;
     if (location == null) return;
 
     await Navigator.of(context).push(
@@ -2280,9 +2350,9 @@ class SensorMetricTile extends StatelessWidget {
               title: Column(
                 crossAxisAlignment: CrossAxisAlignment.start,
                 children: [
-                  Text(data.label),
+                  Text(widget.data.label),
                   Text(
-                    data.value,
+                    widget.data.value,
                     style: Theme.of(pageContext).textTheme.bodySmall,
                   ),
                 ],
@@ -2291,11 +2361,11 @@ class SensorMetricTile extends StatelessWidget {
             body: Column(
               crossAxisAlignment: CrossAxisAlignment.start,
               children: [
-                if (data.secondaryValue != null)
+                if (widget.data.secondaryValue != null)
                   Padding(
                     padding: const EdgeInsets.fromLTRB(16, 0, 16, 12),
                     child: Text(
-                      data.secondaryValue!,
+                      widget.data.secondaryValue!,
                       style: Theme.of(pageContext).textTheme.bodyMedium,
                     ),
                   ),
@@ -2320,7 +2390,7 @@ class SensorMetricTile extends StatelessWidget {
                             height: 40,
                             child: Icon(
                               Icons.location_on,
-                              color: data.accent,
+                              color: widget.data.accent,
                               size: 34,
                             ),
                           ),
@@ -2340,14 +2410,15 @@ class SensorMetricTile extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
+    final data = widget.data;
     return Material(
       color: Colors.transparent,
       child: InkWell(
-        key: ValueKey('${keyPrefix}_${data.fieldKey}'),
+        key: ValueKey('${widget.keyPrefix}_${data.fieldKey}'),
         borderRadius: BorderRadius.circular(22),
-        onLongPress: onLongPress,
+        onLongPress: widget.onLongPress,
         child: Container(
-          width: width,
+          width: widget.width,
           padding: const EdgeInsets.all(8),
           decoration: BoxDecoration(
             color: data.accent.withValues(alpha: 0.08),
@@ -2368,7 +2439,10 @@ class SensorMetricTile extends StatelessWidget {
                         ),
                         const SizedBox(width: 10),
                         Expanded(
-                          child: _MetricText(data: data, keyPrefix: keyPrefix),
+                          child: _MetricText(
+                            data: data,
+                            keyPrefix: widget.keyPrefix,
+                          ),
                         ),
                       ],
                     ),
@@ -2387,7 +2461,7 @@ class SensorMetricTile extends StatelessWidget {
                       ),
                   ],
                 )
-              : data.mapLocation == null || !allowMapPreview
+              : data.mapLocation == null || !widget.allowMapPreview
               ? Stack(
                   children: [
                     Row(
@@ -2396,7 +2470,10 @@ class SensorMetricTile extends StatelessWidget {
                         _MetricIcon(accent: data.accent, icon: data.icon),
                         const SizedBox(width: 10),
                         Expanded(
-                          child: _MetricText(data: data, keyPrefix: keyPrefix),
+                          child: _MetricText(
+                            data: data,
+                            keyPrefix: widget.keyPrefix,
+                          ),
                         ),
                       ],
                     ),
@@ -2424,7 +2501,10 @@ class SensorMetricTile extends StatelessWidget {
                         _MetricIcon(accent: data.accent, icon: data.icon),
                         const SizedBox(width: 10),
                         Expanded(
-                          child: _MetricText(data: data, keyPrefix: keyPrefix),
+                          child: _MetricText(
+                            data: data,
+                            keyPrefix: widget.keyPrefix,
+                          ),
                         ),
                       ],
                     ),
@@ -2439,12 +2519,13 @@ class SensorMetricTile extends StatelessWidget {
                           child: SizedBox(
                             height: 104,
                             width: double.infinity,
-                            child: Stack(
-                              children: [
-                                flutter_map.FlutterMap(
-                                  options: flutter_map.MapOptions(
-                                    initialCenter: data.mapLocation!,
-                                    initialZoom: 14,
+                              child: Stack(
+                                children: [
+                                  flutter_map.FlutterMap(
+                                    mapController: _previewMapController,
+                                    options: flutter_map.MapOptions(
+                                      initialCenter: data.mapLocation!,
+                                      initialZoom: 14,
                                     interactionOptions:
                                         const flutter_map.InteractionOptions(
                                           flags:

pubspec.lock

@@ -827,8 +827,8 @@ packages:
     dependency: "direct main"
     description:
       path: "."
-      ref: a0deff8
-      resolved-ref: a0deff80fcbca974f0e18fe47971b76bec583109
+      ref: "0bb339f684f709cf5b9d40c07827cc62beb18a4d"
+      resolved-ref: "0bb339f684f709cf5b9d40c07827cc62beb18a4d"
       url: "https://github.com/dz0ny/meshcore_client.git"
     source: git
     version: "0.1.0"

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: 2026.0323.2+41
+version: 2026.0324.1+43
 
 environment:
   sdk: ^3.9.2
@@ -44,7 +44,7 @@ dependencies:
   meshcore_client:
     git:
       url: https://github.com/dz0ny/meshcore_client.git
-      ref: a0deff8
+      ref: 0bb339f684f709cf5b9d40c07827cc62beb18a4d
 
   # Codec2 ultra-low-bitrate speech codec (FFI plugin)
   codec2_flutter:

test/providers/channels_provider_test.dart

@@ -1,6 +1,7 @@
 import 'dart:typed_data';
 
 import 'package:flutter_test/flutter_test.dart';
+import 'package:meshcore_sar_app/models/channel.dart';
 import 'package:meshcore_sar_app/providers/channels_provider.dart';
 
 void main() {
@@ -22,4 +23,38 @@ void main() {
       expect(provider.selectedChannel, isNull);
     });
   });
+
+  group('ChannelsProvider mesh hash lookup', () {
+    test('resolves a unique channel display name by hash byte', () {
+      final provider = ChannelsProvider();
+      final channel = Channel.create(index: 3, name: '#ops');
+
+      provider.addOrUpdateChannelObject(channel);
+
+      expect(
+        provider.getUniqueChannelDisplayNameByHashByte(channel.hashByte),
+        '#ops',
+      );
+    });
+
+    test('does not resolve ambiguous hash matches', () {
+      final provider = ChannelsProvider();
+      final secret = Uint8List.fromList(List<int>.filled(16, 7));
+      final firstChannel = Channel.create(
+        index: 1,
+        name: 'Ops 1',
+        explicitSecret: secret,
+      );
+
+      provider.addOrUpdateChannelObject(firstChannel);
+      provider.addOrUpdateChannelObject(
+        Channel.create(index: 2, name: 'Ops 2', explicitSecret: secret),
+      );
+
+      expect(
+        provider.getUniqueChannelDisplayNameByHashByte(firstChannel.hashByte),
+        isNull,
+      );
+    });
+  });
 }

test/providers/contacts_provider_test.dart

@@ -781,6 +781,19 @@ void main() {
       expect(updated.advLat, equals((44.123456 * 1e6).round()));
       expect(updated.advLon, equals((13.654321 * 1e6).round()));
       expect(updated.lastAdvert, equals(1700001234));
+      expect(updated.lastMod, equals(1700001234));
+      expect(
+        provider.estimatedLocationFor(updated.publicKeyHex),
+        isNotNull,
+      );
+      expect(
+        provider.estimatedLocationFor(updated.publicKeyHex)!.latitude,
+        closeTo(44.123456, 0.000001),
+      );
+      expect(
+        provider.estimatedLocationFor(updated.publicKeyHex)!.longitude,
+        closeTo(13.654321, 0.000001),
+      );
     });
 
     test('ignores unknown sender prefix safely', () {
@@ -880,7 +893,7 @@ void main() {
     });
 
     test(
-      'clears runtime contacts before sync without erasing persisted contacts or saved groups',
+      'keeps runtime contacts visible during sync without erasing persisted contacts or saved groups',
       () async {
         final key = createPublicKey(140);
         final pendingKey = createPublicKey(180);
@@ -893,8 +906,11 @@ void main() {
 
         await provider.prepareForDeviceContactSync();
 
-        expect(provider.chatContacts, isEmpty);
-        expect(provider.pendingAdverts, isEmpty);
+        expect(
+          provider.chatContacts.map((contact) => contact.advName),
+          contains('Synced Later'),
+        );
+        expect(provider.pendingAdverts, hasLength(1));
         expect(provider.savedGroupsForSection('teamMembers'), hasLength(1));
 
         final restored = ContactsProvider();

test/providers/messages_provider_retransmission_test.dart

@@ -239,11 +239,12 @@ void main() {
         );
 
         expect(provider.hasChannelSendWarning('c-warn-replay'), isFalse);
-        expect(provider.messages, hasLength(2));
+        expect(provider.messages, hasLength(1));
+        expect(provider.messages.single.id, equals('c-warn-replay'));
       });
     });
 
-    test('channel replay is kept separate for self sender within repeat window', () {
+    test('channel replay merges into sent message for self sender within repeat window', () {
       final provider = MessagesProvider();
       provider.resolveContactNameCallback = (_) => 'dz0ny (SI)';
       provider.addSentMessage(
@@ -259,10 +260,9 @@ void main() {
         ),
       );
 
-      expect(provider.messages, hasLength(2));
-      expect(provider.messages.first.id, equals('c-echo'));
-      expect(provider.messages.last.id, equals('c-echo-incoming'));
-      expect(provider.messages.last.senderName, equals('dz0ny (SI)'));
+      expect(provider.messages, hasLength(1));
+      expect(provider.messages.single.id, equals('c-echo'));
+      expect(provider.messages.single.pathLen, equals(1));
     });
 
     test(
@@ -309,7 +309,7 @@ void main() {
       expect(provider.messages, hasLength(2));
     });
 
-    test('channel replay stays separate using lazily resolved self name', () {
+    test('channel replay merges using lazily resolved self name', () {
       final provider = MessagesProvider();
       provider.addSentMessage(
         _buildSentChannelMessage(id: 'c-lazy', senderTimestamp: 1700000400),
@@ -325,12 +325,11 @@ void main() {
         ),
       );
 
-      expect(provider.messages, hasLength(2));
-      expect(provider.messages.first.id, equals('c-lazy'));
-      expect(provider.messages.last.id, equals('c-lazy-incoming'));
+      expect(provider.messages, hasLength(1));
+      expect(provider.messages.single.id, equals('c-lazy'));
     });
 
-    test('channel replay stays separate for meshcore-prefixed self sender name', () {
+    test('channel replay merges for meshcore-prefixed self sender name', () {
       final provider = MessagesProvider();
       provider.resolveContactNameCallback = (_) => 'MeshCore-dz0ny (SI)';
       provider.addSentMessage(
@@ -346,9 +345,8 @@ void main() {
         ),
       );
 
-      expect(provider.messages, hasLength(2));
-      expect(provider.messages.first.id, equals('c-prefix'));
-      expect(provider.messages.last.id, equals('c-prefix-incoming'));
+      expect(provider.messages, hasLength(1));
+      expect(provider.messages.single.id, equals('c-prefix'));
     });
 
     test('duplicate incoming message increments received copy count', () {
@@ -425,6 +423,133 @@ void main() {
       expect(provider.messages.single.id, equals('handle-1'));
     });
 
+    test('channel duplicates only dedupe against the latest channel message', () {
+      final provider = MessagesProvider();
+      final sender = Uint8List.fromList([9, 8, 7, 6, 5, 4]);
+
+      provider.addMessage(
+        Message(
+          id: 'channel-first',
+          messageType: MessageType.channel,
+          channelIdx: 2,
+          pathLen: 1,
+          textType: MessageTextType.plain,
+          senderTimestamp: 1700000820,
+          text: 'same payload',
+          senderName: 'Radio Alpha',
+          receivedAt: DateTime.now(),
+          senderPublicKeyPrefix: sender,
+        ),
+      );
+      provider.addMessage(
+        Message(
+          id: 'channel-middle',
+          messageType: MessageType.channel,
+          channelIdx: 2,
+          pathLen: 1,
+          textType: MessageTextType.plain,
+          senderTimestamp: 1700000825,
+          text: 'different payload',
+          senderName: 'Radio Bravo',
+          receivedAt: DateTime.now(),
+          senderPublicKeyPrefix: Uint8List.fromList([1, 2, 3, 4, 5, 6]),
+        ),
+      );
+      provider.addMessage(
+        Message(
+          id: 'channel-repeat',
+          messageType: MessageType.channel,
+          channelIdx: 2,
+          pathLen: 2,
+          textType: MessageTextType.plain,
+          senderTimestamp: 1700000830,
+          text: 'same payload',
+          senderName: 'Radio Alpha',
+          receivedAt: DateTime.now(),
+          senderPublicKeyPrefix: sender,
+        ),
+      );
+
+      expect(provider.messages, hasLength(3));
+      expect(provider.messages.last.id, equals('channel-repeat'));
+    });
+
+    test('adjacent channel duplicates still dedupe within 5 seconds', () {
+      final provider = MessagesProvider();
+      final sender = Uint8List.fromList([4, 5, 6, 7, 8, 9]);
+      final baseTime = DateTime.fromMillisecondsSinceEpoch(1700000840000);
+
+      provider.addMessage(
+        Message(
+          id: 'adjacent-1',
+          messageType: MessageType.channel,
+          channelIdx: 3,
+          pathLen: 1,
+          textType: MessageTextType.plain,
+          senderTimestamp: 1700000840,
+          text: 'same payload',
+          senderName: 'Radio Charlie',
+          receivedAt: baseTime,
+          senderPublicKeyPrefix: sender,
+        ),
+      );
+      provider.addMessage(
+        Message(
+          id: 'adjacent-2',
+          messageType: MessageType.channel,
+          channelIdx: 3,
+          pathLen: 2,
+          textType: MessageTextType.plain,
+          senderTimestamp: 1700000845,
+          text: 'same payload',
+          senderName: 'Radio Charlie',
+          receivedAt: baseTime.add(const Duration(seconds: 4)),
+          senderPublicKeyPrefix: sender,
+        ),
+      );
+
+      expect(provider.messages, hasLength(1));
+      expect(provider.messages.single.id, equals('adjacent-1'));
+    });
+
+    test('channel duplicates outside 5 second window are kept', () {
+      final provider = MessagesProvider();
+      final sender = Uint8List.fromList([6, 7, 8, 9, 0, 1]);
+      final baseTime = DateTime.fromMillisecondsSinceEpoch(1700000850000);
+
+      provider.addMessage(
+        Message(
+          id: 'window-1',
+          messageType: MessageType.channel,
+          channelIdx: 4,
+          pathLen: 1,
+          textType: MessageTextType.plain,
+          senderTimestamp: 1700000850,
+          text: 'same payload',
+          senderName: 'Radio Delta',
+          receivedAt: baseTime,
+          senderPublicKeyPrefix: sender,
+        ),
+      );
+      provider.addMessage(
+        Message(
+          id: 'window-2',
+          messageType: MessageType.channel,
+          channelIdx: 4,
+          pathLen: 2,
+          textType: MessageTextType.plain,
+          senderTimestamp: 1700000855,
+          text: 'same payload',
+          senderName: 'Radio Delta',
+          receivedAt: baseTime.add(const Duration(seconds: 6)),
+          senderPublicKeyPrefix: sender,
+        ),
+      );
+
+      expect(provider.messages, hasLength(2));
+      expect(provider.messages.last.id, equals('window-2'));
+    });
+
     test('display list collapses stored duplicates and sums copy counts', () {
       final provider = MessagesProvider();
       final sender = Uint8List.fromList([5, 4, 3, 2, 1, 0]);
@@ -465,6 +590,30 @@ void main() {
       expect(display.single.occurrenceCount, equals(2));
     });
 
+    test('display list keeps a single sent message for self replay', () {
+      final provider = MessagesProvider();
+      provider.resolveContactNameCallback = (_) => 'dz0ny (SI)';
+      provider.addSentMessage(
+        _buildSentChannelMessage(id: 'display-sent', senderTimestamp: 1700000900),
+      );
+      provider.markMessageSent('display-sent', 0, 0);
+
+      provider.addMessage(
+        _buildReceivedChannelReplay(
+          id: 'display-received',
+          senderTimestamp: 1700000901,
+          senderName: 'dz0ny (SI)',
+        ),
+      );
+
+      final display = provider.buildDisplayMessages(
+        provider.getRecentMessages(),
+      );
+
+      expect(display, hasLength(1));
+      expect(display.single.message.id, equals('display-sent'));
+    });
+
     test('missing ACK schedules a delayed retransmission', () {
       fakeAsync((async) {
         final provider = MessagesProvider();

test/providers/sensors_provider_test.dart

@@ -356,7 +356,7 @@ void main() {
     expect(connectionProvider.pingCalls, 2);
   });
 
-  test('refreshDueSensors refreshes self every minute', () async {
+  test('refreshDueSensors refreshes self every 30 seconds', () async {
     SharedPreferences.setMockInitialValues({});
     final selfKey = Uint8List(32)..[0] = 0x66;
     final contactsProvider = ContactsProvider();
@@ -383,14 +383,21 @@ void main() {
       contactsProvider: contactsProvider,
       connectionProvider: connectionProvider,
     );
-    expect(connectionProvider.pingCalls, 1);
+    expect(connectionProvider.pingCalls, 2);
+
+    await provider.refreshDueSensors(
+      now: start.add(const Duration(seconds: 59)),
+      contactsProvider: contactsProvider,
+      connectionProvider: connectionProvider,
+    );
+    expect(connectionProvider.pingCalls, 2);
 
     await provider.refreshDueSensors(
       now: start.add(const Duration(minutes: 1)),
       contactsProvider: contactsProvider,
       connectionProvider: connectionProvider,
     );
-    expect(connectionProvider.pingCalls, 2);
+    expect(connectionProvider.pingCalls, 3);
   });
 
   test(

test/screens/live_traffic_screen_test.dart

@@ -2,9 +2,12 @@ import 'dart:typed_data';
 
 import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
+import 'package:meshcore_sar_app/models/channel.dart';
 import 'package:meshcore_sar_app/models/ble_packet_log.dart';
 import 'package:meshcore_sar_app/l10n/app_localizations.dart';
+import 'package:meshcore_sar_app/providers/channels_provider.dart';
 import 'package:meshcore_sar_app/screens/live_traffic_screen.dart';
+import 'package:provider/provider.dart';
 
 BlePacketLog _log({
   required DateTime timestamp,
@@ -51,12 +54,16 @@ List<int> _multiHopRaw({
   ];
 }
 
-Widget _testApp(Widget child) {
-  return MaterialApp(
+Widget _testApp(Widget child, {ChannelsProvider? channelsProvider}) {
+  final app = MaterialApp(
     localizationsDelegates: AppLocalizations.localizationsDelegates,
     supportedLocales: AppLocalizations.supportedLocales,
     home: child,
   );
+  if (channelsProvider == null) {
+    return app;
+  }
+  return ChangeNotifierProvider.value(value: channelsProvider, child: app);
 }
 
 void main() {
@@ -190,6 +197,82 @@ void main() {
     expect(find.textContaining('Size: 3 bytes'), findsOneWidget);
   });
 
+  testWidgets('shows known channel name for group traffic', (tester) async {
+    final logs = <BlePacketLog>[];
+    final refresh = ValueNotifier<int>(0);
+    final channel = Channel.create(index: 3, name: '#ops');
+    final channelsProvider = ChannelsProvider()
+      ..initializePublicChannel()
+      ..addOrUpdateChannelObject(channel);
+    final 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], payloadType: 0x05),
+          channel.hashByte,
+        ],
+        responseCode: 0x88,
+      ),
+    );
+
+    await tester.pumpWidget(
+      _testApp(
+        LiveTrafficScreen(
+          logReader: () => logs,
+          refreshListenable: refresh,
+          now: () => now,
+        ),
+        channelsProvider: channelsProvider,
+      ),
+    );
+
+    expect(find.text('#ops'), findsOneWidget);
+    expect(find.text('Channel: #ops (${channel.hashHex})'), findsOneWidget);
+    expect(find.text('FLOOD GROUP_TEXT'), findsNothing);
+  });
+
+  testWidgets('shows packet type help sheet from the app bar', (tester) async {
+    final logs = <BlePacketLog>[];
+    final refresh = ValueNotifier<int>(0);
+    final now = DateTime(2026, 3, 12, 12, 0, 0);
+
+    await tester.pumpWidget(
+      _testApp(
+        LiveTrafficScreen(
+          logReader: () => logs,
+          refreshListenable: refresh,
+          now: () => now,
+        ),
+      ),
+    );
+
+    await tester.tap(find.byTooltip('Packet type help'));
+    await tester.pumpAndSettle();
+
+    expect(find.text('Packet Types'), findsOneWidget);
+    await tester.scrollUntilVisible(
+      find.text('FLOOD RETURNED_PATH'),
+      300,
+      scrollable: find.byType(Scrollable).last,
+    );
+    await tester.pumpAndSettle();
+    expect(find.text('FLOOD RETURNED_PATH'), findsOneWidget);
+    expect(
+      find.textContaining('stores that returned path as the peer\'s direct out-path'),
+      findsOneWidget,
+    );
+    await tester.scrollUntilVisible(
+      find.text('FLOOD CONTROL'),
+      300,
+      scrollable: find.byType(Scrollable).last,
+    );
+    await tester.pumpAndSettle();
+    expect(find.text('FLOOD CONTROL'), findsOneWidget);
+  });
+
   testWidgets('summary metrics expand across wide layouts', (tester) async {
     tester.view.physicalSize = const Size(1200, 900);
     tester.view.devicePixelRatio = 1;

test/screens/messages_tab_test.dart

@@ -13,6 +13,7 @@ import 'package:meshcore_sar_app/providers/map_provider.dart';
 import 'package:meshcore_sar_app/providers/messages_provider.dart';
 import 'package:meshcore_sar_app/providers/voice_provider.dart';
 import 'package:meshcore_sar_app/screens/messages_tab.dart';
+import 'package:meshcore_sar_app/services/message_destination_preferences.dart';
 import 'package:meshcore_sar_app/services/voice_codec_service.dart';
 import 'package:meshcore_sar_app/services/voice_player_service.dart';
 import 'package:provider/provider.dart';
@@ -208,4 +209,227 @@ void main() {
     connectionProvider.dispose();
     channelsProvider.dispose();
   });
+
+  testWidgets(
+    'locks messages tab to the configured channel and removes the selector affordance',
+    (tester) async {
+      final lockedChannel = buildContact(
+        name: '#ops',
+        type: ContactType.channel,
+        secondByte: 2,
+      );
+      SharedPreferences.setMockInitialValues({
+        'message_locked_destination_enabled': true,
+        'message_locked_destination_type':
+            MessageDestinationPreferences.destinationTypeChannel,
+        'message_locked_recipient_public_key': lockedChannel.publicKeyHex,
+      });
+
+      final connectionProvider = ConnectionProvider();
+      final contactsProvider = ContactsProvider();
+      final messagesProvider = MessagesProvider();
+      final mapProvider = MapProvider();
+      final drawingProvider = DrawingProvider();
+      await messagesProvider.initialize();
+      await drawingProvider.initialize();
+      final channelsProvider = ChannelsProvider()..initializePublicChannel();
+      final voiceProvider = VoiceProvider(
+        codec: VoiceCodecService(),
+        player: VoicePlayerService(),
+      );
+      final imageProvider = ip.ImageProvider();
+      final appProvider = AppProvider(
+        connectionProvider: connectionProvider,
+        contactsProvider: contactsProvider,
+        messagesProvider: messagesProvider,
+        drawingProvider: drawingProvider,
+        channelsProvider: channelsProvider,
+        voiceProvider: voiceProvider,
+        imageProvider: imageProvider,
+      );
+
+      contactsProvider.addContacts([lockedChannel]);
+      messagesProvider.addMessage(
+        Message(
+          id: 'public-message',
+          messageType: MessageType.channel,
+          pathLen: 1,
+          textType: MessageTextType.plain,
+          senderTimestamp: 1700000200,
+          text: 'Public chatter',
+          receivedAt: DateTime.now(),
+          channelIdx: 0,
+        ),
+      );
+      messagesProvider.addMessage(
+        Message(
+          id: 'locked-message',
+          messageType: MessageType.channel,
+          pathLen: 1,
+          textType: MessageTextType.plain,
+          senderTimestamp: 1700000201,
+          text: 'Ops chatter',
+          receivedAt: DateTime.now(),
+          channelIdx: 2,
+        ),
+      );
+
+      await tester.pumpWidget(
+        MultiProvider(
+          providers: [
+            ChangeNotifierProvider.value(value: connectionProvider),
+            ChangeNotifierProvider.value(value: contactsProvider),
+            ChangeNotifierProvider.value(value: messagesProvider),
+            ChangeNotifierProvider.value(value: mapProvider),
+            ChangeNotifierProvider.value(value: drawingProvider),
+            ChangeNotifierProvider.value(value: channelsProvider),
+            ChangeNotifierProvider.value(value: voiceProvider),
+            ChangeNotifierProvider.value(value: imageProvider),
+            ChangeNotifierProvider.value(value: appProvider),
+          ],
+          child: MaterialApp(
+            localizationsDelegates: AppLocalizations.localizationsDelegates,
+            supportedLocales: AppLocalizations.supportedLocales,
+            home: const Scaffold(body: MessagesTab(isActive: true)),
+          ),
+        ),
+      );
+
+      await tester.pumpAndSettle();
+
+      expect(find.text('Ops chatter'), findsOneWidget);
+      expect(find.text('Public chatter'), findsNothing);
+      expect(
+        find.byKey(const ValueKey('messages_composer_destination_locked')),
+        findsOneWidget,
+      );
+      expect(
+        find.byKey(const ValueKey('messages_composer_destination_selector')),
+        findsNothing,
+      );
+
+      appProvider.dispose();
+      voiceProvider.dispose();
+      imageProvider.dispose();
+      drawingProvider.dispose();
+      mapProvider.dispose();
+      messagesProvider.dispose();
+      contactsProvider.dispose();
+      connectionProvider.dispose();
+      channelsProvider.dispose();
+    },
+  );
+
+  testWidgets(
+    'contact navigation temporarily overrides the lock while keeping the selector hidden',
+    (tester) async {
+      final directContact = buildContact(
+        name: 'Tim',
+        type: ContactType.chat,
+        secondByte: 9,
+      );
+      SharedPreferences.setMockInitialValues({
+        'message_locked_destination_enabled': true,
+        'message_locked_destination_type':
+            MessageDestinationPreferences.destinationTypeChannel,
+      });
+
+      final connectionProvider = ConnectionProvider();
+      final contactsProvider = ContactsProvider();
+      final messagesProvider = MessagesProvider();
+      final mapProvider = MapProvider();
+      final drawingProvider = DrawingProvider();
+      await messagesProvider.initialize();
+      await drawingProvider.initialize();
+      final channelsProvider = ChannelsProvider()..initializePublicChannel();
+      final voiceProvider = VoiceProvider(
+        codec: VoiceCodecService(),
+        player: VoicePlayerService(),
+      );
+      final imageProvider = ip.ImageProvider();
+      final appProvider = AppProvider(
+        connectionProvider: connectionProvider,
+        contactsProvider: contactsProvider,
+        messagesProvider: messagesProvider,
+        drawingProvider: drawingProvider,
+        channelsProvider: channelsProvider,
+        voiceProvider: voiceProvider,
+        imageProvider: imageProvider,
+      );
+
+      contactsProvider.addContacts([directContact]);
+      messagesProvider.addMessage(
+        Message(
+          id: 'public-message',
+          messageType: MessageType.channel,
+          pathLen: 1,
+          textType: MessageTextType.plain,
+          senderTimestamp: 1700000300,
+          text: 'Public chatter',
+          receivedAt: DateTime.now(),
+          channelIdx: 0,
+        ),
+      );
+      messagesProvider.addMessage(
+        Message(
+          id: 'direct-message',
+          messageType: MessageType.contact,
+          senderPublicKeyPrefix: directContact.publicKey.sublist(0, 6),
+          pathLen: 1,
+          textType: MessageTextType.plain,
+          senderTimestamp: 1700000301,
+          text: 'Direct chatter',
+          receivedAt: DateTime.now(),
+        ),
+      );
+      messagesProvider.navigateToDestination(
+        MessageDestinationPreferences.destinationTypeContact,
+        recipientPublicKeyHex: directContact.publicKeyHex,
+      );
+
+      await tester.pumpWidget(
+        MultiProvider(
+          providers: [
+            ChangeNotifierProvider.value(value: connectionProvider),
+            ChangeNotifierProvider.value(value: contactsProvider),
+            ChangeNotifierProvider.value(value: messagesProvider),
+            ChangeNotifierProvider.value(value: mapProvider),
+            ChangeNotifierProvider.value(value: drawingProvider),
+            ChangeNotifierProvider.value(value: channelsProvider),
+            ChangeNotifierProvider.value(value: voiceProvider),
+            ChangeNotifierProvider.value(value: imageProvider),
+            ChangeNotifierProvider.value(value: appProvider),
+          ],
+          child: MaterialApp(
+            localizationsDelegates: AppLocalizations.localizationsDelegates,
+            supportedLocales: AppLocalizations.supportedLocales,
+            home: const Scaffold(body: MessagesTab(isActive: true)),
+          ),
+        ),
+      );
+
+      await tester.pumpAndSettle();
+
+      expect(find.text('Direct chatter'), findsOneWidget);
+      expect(find.text('Public chatter'), findsNothing);
+      expect(
+        find.byKey(const ValueKey('messages_composer_destination_locked')),
+        findsOneWidget,
+      );
+      expect(
+        find.byKey(const ValueKey('messages_composer_destination_selector')),
+        findsNothing,
+      );
+
+      appProvider.dispose();
+      voiceProvider.dispose();
+      imageProvider.dispose();
+      drawingProvider.dispose();
+      mapProvider.dispose();
+      messagesProvider.dispose();
+      contactsProvider.dispose();
+      connectionProvider.dispose();
+      channelsProvider.dispose();
+    },
+  );
 }

test/services/live_traffic_summary_test.dart

@@ -196,5 +196,18 @@ void main() {
         1,
       );
     });
+
+    test('exposes detailed descriptions for known packet types', () {
+      final returnedPath = LiveTrafficEntry.payloadTypeDetails(0x08);
+      final control = LiveTrafficEntry.payloadTypeDetails(0x0B);
+
+      expect(returnedPath.title, 'FLOOD RETURNED_PATH');
+      expect(
+        returnedPath.description,
+        contains('stores that returned path as the peer\'s direct out-path'),
+      );
+      expect(control.label, 'Control packet');
+      expect(control.description, contains('discovery request and response'));
+    });
   });
 }

test/services/message_storage_service_test.dart

@@ -1,5 +1,4 @@
-import 'dart:typed_data';
-
+import 'package:flutter/foundation.dart';
 import 'package:flutter_test/flutter_test.dart';
 import 'package:meshcore_client/meshcore_client.dart';
 import 'package:meshcore_sar_app/models/message_reception_details.dart';
@@ -8,11 +7,16 @@ import 'package:shared_preferences/shared_preferences.dart';
 
 void main() {
   TestWidgetsFlutterBinding.ensureInitialized();
+  final originalDebugPrint = debugPrint;
 
   setUp(() {
     SharedPreferences.setMockInitialValues({});
   });
 
+  tearDown(() {
+    debugPrint = originalDebugPrint;
+  });
+
   test(
     'retains path bytes for stored unread message when reception sidecar is missing',
     () async {
@@ -155,4 +159,34 @@ void main() {
     expect(customMessages.single.id, customMessage.id);
     expect(customMessages.single.text, customMessage.text);
   });
+
+  test('skips unchanged message snapshots', () async {
+    final storage = MessageStorageService();
+    final logs = <String>[];
+    debugPrint = (String? message, {int? wrapWidth}) {
+      if (message != null) {
+        logs.add(message);
+      }
+    };
+    final message = Message(
+      id: 'msg-stable',
+      messageType: MessageType.channel,
+      senderPublicKeyPrefix: Uint8List.fromList([3, 3, 3, 3, 3, 3]),
+      channelIdx: 3,
+      pathLen: 1,
+      textType: MessageTextType.plain,
+      senderTimestamp: 1700003000,
+      text: 'Stable snapshot',
+      receivedAt: DateTime.fromMillisecondsSinceEpoch(1700003000500),
+      isRead: true,
+    );
+
+    await storage.saveMessages([message]);
+    await storage.saveMessages([message]);
+
+    expect(
+      logs.where((log) => log.contains('Saved 1 messages to storage')),
+      hasLength(1),
+    );
+  });
 }

test/services/path_history_service_test.dart

@@ -207,6 +207,22 @@ void main() {
     },
   );
 
+  test('clear history removes stored direct paths for one contact', () async {
+    final service = PathHistoryService();
+
+    await service.initialize();
+    await service.recordReceivedBytePath('abc123', [0x01, 0x02], 1);
+    await service.recordReceivedBytePath('def456', [0x03, 0x04], 1);
+
+    expect(service.historyFor('abc123').directPaths, hasLength(1));
+    expect(service.historyFor('def456').directPaths, hasLength(1));
+
+    await service.clearHistoryFor('abc123');
+
+    expect(service.historyFor('abc123').directPaths, isEmpty);
+    expect(service.historyFor('def456').directPaths, hasLength(1));
+  });
+
   test('last successful direct path is chosen by location fit', () async {
     final service = PathHistoryService();
     final contact = _buildContact(

test/widgets/sensor_telemetry_card_test.dart

@@ -1,6 +1,8 @@
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
+import 'package:flutter_map/flutter_map.dart' as flutter_map;
 import 'package:flutter_test/flutter_test.dart';
+import 'package:latlong2/latlong.dart';
 import 'package:meshcore_sar_app/l10n/app_localizations.dart';
 import 'package:meshcore_sar_app/models/contact.dart';
 import 'package:meshcore_sar_app/providers/sensors_provider.dart';
@@ -140,6 +142,8 @@ void main() {
   });
 
   testWidgets('renders MeshCore custom weather metrics', (tester) async {
+    tester.platformDispatcher.localeTestValue = const Locale('sl', 'SI');
+    addTearDown(tester.platformDispatcher.clearLocaleTestValue);
     final publicKey = Uint8List(32);
     publicKey[0] = 0x46;
     final contact = Contact(
@@ -185,11 +189,130 @@ void main() {
     expect(find.text('Wind gust'), findsOneWidget);
     expect(find.text('Dew point'), findsOneWidget);
     expect(find.text('Rain'), findsOneWidget);
-    expect(find.text('3.7 m/s'), findsOneWidget);
+    expect(find.textContaining('km/h'), findsOneWidget);
+    expect(find.textContaining('m/s'), findsNothing);
     expect(find.text('2°C'), findsOneWidget);
     expect(find.text('12.3 mm'), findsOneWidget);
   });
 
+  testWidgets('renders speed in mph for imperial system locale', (
+    tester,
+  ) async {
+    tester.platformDispatcher.localeTestValue = const Locale('en', 'US');
+    addTearDown(tester.platformDispatcher.clearLocaleTestValue);
+
+    final publicKey = Uint8List(32);
+    publicKey[0] = 0x4A;
+    final contact = Contact(
+      publicKey: publicKey,
+      type: ContactType.sensor,
+      flags: 0,
+      outPathLen: 0,
+      outPath: Uint8List(64),
+      advName: 'WX Station',
+      lastAdvert: DateTime.now().millisecondsSinceEpoch ~/ 1000,
+      advLat: 0,
+      advLon: 0,
+      lastMod: DateTime.now().millisecondsSinceEpoch ~/ 1000,
+      telemetry: ContactTelemetry(
+        timestamp: DateTime.now().subtract(const Duration(minutes: 1)),
+        extraSensorData: const {'speed_2': 3.7},
+      ),
+    );
+
+    await tester.pumpWidget(
+      MaterialApp(
+        localizationsDelegates: AppLocalizations.localizationsDelegates,
+        supportedLocales: AppLocalizations.supportedLocales,
+        home: Scaffold(
+          body: SensorTelemetryCard(
+            contact: contact,
+            state: SensorRefreshState.idle,
+            visibleFields: const {'extra:speed_2'},
+            fieldSpans: sensorFullWidthFieldSpans(const {'extra:speed_2'}),
+          ),
+        ),
+      ),
+    );
+
+    expect(find.textContaining('mph'), findsOneWidget);
+    expect(find.textContaining('m/s'), findsNothing);
+  });
+
+  testWidgets('gps preview map recenters when telemetry location changes', (
+    tester,
+  ) async {
+    final publicKey = Uint8List(32);
+    publicKey[0] = 0x4B;
+
+    Contact buildGpsContact(double latitude, double longitude) => Contact(
+      publicKey: publicKey,
+      type: ContactType.sensor,
+      flags: 0,
+      outPathLen: 0,
+      outPath: Uint8List(64),
+      advName: 'GPS Station',
+      lastAdvert: DateTime.now().millisecondsSinceEpoch ~/ 1000,
+      advLat: 0,
+      advLon: 0,
+      lastMod: DateTime.now().millisecondsSinceEpoch ~/ 1000,
+      telemetry: ContactTelemetry(
+        gpsLocation: LatLng(latitude, longitude),
+        timestamp: DateTime.now().subtract(const Duration(minutes: 1)),
+      ),
+    );
+
+    var contact = buildGpsContact(46.0569, 14.5058);
+
+    await tester.pumpWidget(
+      StatefulBuilder(
+        builder: (context, setState) {
+          return MaterialApp(
+            localizationsDelegates: AppLocalizations.localizationsDelegates,
+            supportedLocales: AppLocalizations.supportedLocales,
+            home: Scaffold(
+              body: Column(
+                children: [
+                  ElevatedButton(
+                    onPressed: () {
+                      setState(() {
+                        contact = buildGpsContact(46.1000, 14.6000);
+                      });
+                    },
+                    child: const Text('Update'),
+                  ),
+                  SensorTelemetryCard(
+                    contact: contact,
+                    state: SensorRefreshState.idle,
+                    visibleFields: const {'gps'},
+                    fieldSpans: sensorFullWidthFieldSpans(const {'gps'}),
+                  ),
+                ],
+              ),
+            ),
+          );
+        },
+      ),
+    );
+
+    final initialMap = tester.widget<flutter_map.FlutterMap>(
+      find.byType(flutter_map.FlutterMap).first,
+    );
+    final initialCenter = initialMap.mapController!.camera.center;
+    expect(initialCenter.latitude, closeTo(46.0569, 0.0001));
+    expect(initialCenter.longitude, closeTo(14.5058, 0.0001));
+
+    await tester.tap(find.text('Update'));
+    await tester.pump();
+
+    final updatedMap = tester.widget<flutter_map.FlutterMap>(
+      find.byType(flutter_map.FlutterMap).first,
+    );
+    final updatedCenter = updatedMap.mapController!.camera.center;
+    expect(updatedCenter.latitude, closeTo(46.1000, 0.0001));
+    expect(updatedCenter.longitude, closeTo(14.6000, 0.0001));
+  });
+
   testWidgets('renders generic percentage separately from UV for weather payload', (tester) async {
     tester.view.physicalSize = const Size(1600, 2600);
     tester.view.devicePixelRatio = 1.0;
@@ -415,8 +538,11 @@ void main() {
       ),
     );
 
+    final scaffoldKey = GlobalKey<ScaffoldMessengerState>();
+
     await tester.pumpWidget(
       MaterialApp(
+        scaffoldMessengerKey: scaffoldKey,
         localizationsDelegates: AppLocalizations.localizationsDelegates,
         supportedLocales: AppLocalizations.supportedLocales,
         home: Scaffold(
@@ -431,15 +557,43 @@ void main() {
     );
 
     await tester.tap(find.byIcon(Icons.more_vert));
-    await tester.pumpAndSettle();
+    await tester.pump();
+    await tester.pump(const Duration(milliseconds: 300));
 
     expect(find.text('Copy raw response'), findsOneWidget);
 
+    // Capture clipboard writes via the test platform channel mock.
+    String? clipboardText;
+    tester.binding.defaultBinaryMessenger.setMockMethodCallHandler(
+      SystemChannels.platform,
+      (MethodCall call) async {
+        if (call.method == 'Clipboard.setData') {
+          final args = call.arguments as Map<dynamic, dynamic>;
+          clipboardText = args['text'] as String?;
+        }
+        if (call.method == 'Clipboard.getData') {
+          return <String, dynamic>{'text': clipboardText};
+        }
+        return null;
+      },
+    );
+    addTearDown(() {
+      tester.binding.defaultBinaryMessenger.setMockMethodCallHandler(
+        SystemChannels.platform,
+        null,
+      );
+    });
+
     await tester.tap(find.text('Copy raw response'));
     await tester.pump();
+    await tester.pump(const Duration(milliseconds: 300));
 
-    final clipboardData = await Clipboard.getData(Clipboard.kTextPlain);
-    expect(clipboardData?.text, '01 67 00 d7');
+    expect(clipboardText, '01 67 00 d7');
     expect(find.text('Raw response copied'), findsOneWidget);
+
+    // Clear the SnackBar to prevent its timer from blocking teardown.
+    scaffoldKey.currentState?.clearSnackBars();
+    await tester.pump(const Duration(seconds: 5));
+    await tester.pump(const Duration(seconds: 5));
   });
 }