Use LogRxRouteDecoder in AppProvider

lib/providers/app_provider.dart

@@ -29,6 +29,7 @@ import '../utils/image_message_parser.dart';
 import '../utils/media_swarm_protocol.dart';
 import '../utils/message_airtime_estimator.dart';
 import '../utils/fast_gps_packet.dart';
+import '../utils/log_rx_route_decoder.dart';
 
 class _DirectMessageRouteSession {
   final PathSelection currentSelection;
@@ -2573,12 +2574,10 @@ class AppProvider with ChangeNotifier {
       if (log.responseCode != 0x88) continue;
       if (log.rawData.length < 6) continue;
 
-      final raw = log.rawData;
-      final payloadType = (raw[3] >> 2) & 0x0F;
-      final pathLen = raw[4];
-      if (payloadType != expectedPayloadType) continue;
-      if (pathLen != message.pathLen) continue;
-      if (raw.length < 5 + pathLen) continue;
+      final decoded = LogRxRouteDecoder.decode(log.rawData);
+      if (decoded == null) continue;
+      if (decoded.payloadType != expectedPayloadType) continue;
+      if (decoded.hopCount != message.pathLen) continue;
 
       final deltaMs =
           (log.timestamp.difference(message.receivedAt).inMilliseconds).abs();
@@ -2594,11 +2593,9 @@ class AppProvider with ChangeNotifier {
 
   List<int>? _extractPathBytesFromLog(BlePacketLog? log) {
     if (log == null) return null;
-    final raw = log.rawData;
-    if (raw.length < 6) return null;
-    final pathLen = raw[4];
-    if (pathLen <= 0 || raw.length < 5 + pathLen) return null;
-    return raw.sublist(5, 5 + pathLen);
+    final decoded = LogRxRouteDecoder.decode(log.rawData);
+    if (decoded == null || decoded.pathBytes.isEmpty) return null;
+    return decoded.pathBytes;
   }
 
   // Removed _syncMessages() - messages are automatically synced via PUSH_CODE_MSG_WAITING events

lib/providers/messages_provider.dart

@@ -885,6 +885,54 @@ class MessagesProvider with ChangeNotifier {
     }
   }
 
+  /// Mark unread messages for a specific destination as read.
+  void markDestinationAsRead({
+    required String destinationType,
+    Contact? contact,
+  }) {
+    if (destinationType == 'all') {
+      markAllAsRead();
+      return;
+    }
+
+    bool hasChanges = false;
+    for (int i = 0; i < _messages.length; i++) {
+      final message = _messages[i];
+      if (message.isRead || message.isSentMessage || message.isSystemMessage) {
+        continue;
+      }
+
+      final matchesDestination = switch (destinationType) {
+        'channel' => _isChannelMessageForContact(message, contact),
+        'contact' || 'room' => contact != null && _isMessageForDestination(message, contact),
+        _ => false,
+      };
+
+      if (!matchesDestination) {
+        continue;
+      }
+
+      _messages[i] = message.copyWith(isRead: true);
+      hasChanges = true;
+    }
+
+    if (hasChanges) {
+      _persistMessages();
+      notifyListeners();
+    }
+  }
+
+  bool _isChannelMessageForContact(Message message, Contact? contact) {
+    if (!message.isChannelMessage) {
+      return false;
+    }
+
+    final selectedChannelIdx = contact != null && contact.publicKey.length > 1
+        ? contact.publicKey[1]
+        : 0;
+    return (message.channelIdx ?? 0) == selectedChannelIdx;
+  }
+
   /// Mark a specific message as read
   void markAsRead(String messageId) {
     final index = _messages.indexWhere((m) => m.id == messageId);

lib/screens/home_screen.dart

@@ -195,7 +195,6 @@ class _HomeScreenState extends State<HomeScreen>
 
       switch (tab) {
         case _HomeTab.messages:
-          context.read<MessagesProvider>().markAllAsRead();
           break;
         case _HomeTab.contacts:
           context.read<ContactsProvider>().markAllAsViewed();

lib/screens/messages_tab.dart

@@ -89,9 +89,7 @@ class _MessagesTabState extends State<MessagesTab> {
     // Load saved message destination
     _loadSavedDestination();
     _loadVoiceBitrate();
-    // Mark all messages as read when tab is opened
     WidgetsBinding.instance.addPostFrameCallback((_) {
-      context.read<MessagesProvider>().markAllAsRead();
       _checkForNavigationRequest();
     });
   }
@@ -309,6 +307,8 @@ class _MessagesTabState extends State<MessagesTab> {
       _selectedRecipient = recipient;
     });
 
+    _markCurrentDestinationAsRead();
+
     _enforceMessageByteLimit();
 
     // Save to preferences
@@ -465,6 +465,7 @@ class _MessagesTabState extends State<MessagesTab> {
 
       _textController.clear();
       _focusNode.unfocus();
+      _markCurrentDestinationAsRead();
 
       if (!mounted) return;
     } catch (e) {
@@ -1641,6 +1642,13 @@ class _MessagesTabState extends State<MessagesTab> {
     }
   }
 
+  void _markCurrentDestinationAsRead() {
+    context.read<MessagesProvider>().markDestinationAsRead(
+      destinationType: _destinationType,
+      contact: _selectedRecipient,
+    );
+  }
+
   List<Message> _getFilteredMessages(MessagesProvider messagesProvider) {
     // Get all recent messages
     final allMessages = messagesProvider.getRecentMessages(count: 100);

lib/utils/log_rx_route_decoder.dart

@@ -4,11 +4,13 @@ import '../models/contact.dart';
 
 class DecodedLogRxRoute {
   final int payloadType;
+  final int pathDescriptor;
   final List<int> pathBytes;
   final int hashSize;
 
   const DecodedLogRxRoute({
     required this.payloadType,
+    required this.pathDescriptor,
     required this.pathBytes,
     required this.hashSize,
   });
@@ -63,21 +65,49 @@ class LogRxRouteDecoder {
     }
 
     if (rawPacketData.length <= index) return null;
-    final pathLen = rawPacketData[index++];
-    if (rawPacketData.length < index + pathLen) return null;
-    final pathBytes = rawPacketData.sublist(index, index + pathLen);
-    final hashSize = inferHashSize(
-      pathBytes,
-      preferredHashSize: preferredHashSize,
-    );
+    final pathDescriptor = rawPacketData[index++];
+    final pathMode = (pathDescriptor & 0xFF) >> 6;
+    final pathByteLen = pathMode == 0
+        ? pathDescriptor
+        : descriptorByteLength(pathDescriptor);
+    if (pathByteLen == null || rawPacketData.length < index + pathByteLen) {
+      return null;
+    }
+    final pathBytes = rawPacketData.sublist(index, index + pathByteLen);
+    final hashSize = pathMode == 0
+        ? inferHashSize(pathBytes, preferredHashSize: preferredHashSize)
+        : (descriptorHashSize(pathDescriptor) ??
+              inferHashSize(pathBytes, preferredHashSize: preferredHashSize));
 
     return DecodedLogRxRoute(
       payloadType: payloadType,
+      pathDescriptor: pathDescriptor,
       pathBytes: pathBytes,
       hashSize: hashSize,
     );
   }
 
+  static int? descriptorHashSize(int pathDescriptor) {
+    final normalized = pathDescriptor & 0xFF;
+    final mode = normalized >> 6;
+    if (mode == 3) return null;
+    return mode + 1;
+  }
+
+  static int? descriptorHopCount(int pathDescriptor) {
+    final hashSize = descriptorHashSize(pathDescriptor);
+    if (hashSize == null) return null;
+    return (pathDescriptor & 0xFF) & 0x3F;
+  }
+
+  static int? descriptorByteLength(int pathDescriptor) {
+    final hashSize = descriptorHashSize(pathDescriptor);
+    final hopCount = descriptorHopCount(pathDescriptor);
+    if (hashSize == null || hopCount == null) return null;
+    final byteLen = hopCount * hashSize;
+    return byteLen <= 64 ? byteLen : null;
+  }
+
   static int inferHashSize(List<int> pathBytes, {int? preferredHashSize}) {
     if (pathBytes.isEmpty) return 1;
 

lib/widgets/messages/message_bubble.dart

@@ -27,6 +27,7 @@ import '../../utils/tictactoe_message_parser.dart';
 import '../../utils/location_formats.dart';
 import '../../l10n/app_localizations.dart';
 import '../../utils/message_extensions.dart';
+import '../../utils/log_rx_route_decoder.dart';
 import '../../models/message_transfer_details.dart';
 import 'voice_message_bubble.dart';
 import 'image_message_bubble.dart';
@@ -1269,12 +1270,10 @@ class _MessageBubbleState extends State<MessageBubble> {
 
       // Logged frame format:
       // [0]=response code 0x88, [1]=snrRaw, [2]=rssi, [3]=packet header, [4]=pathLen
-      final raw = log.rawData;
-      final payloadType = (raw[3] >> 2) & 0x0F;
-      final pathLen = raw[4];
-      if (payloadType != expectedPayloadType) continue;
-      if (pathLen != message.pathLen) continue;
-      if (raw.length < 5 + pathLen) continue;
+      final decoded = LogRxRouteDecoder.decode(log.rawData);
+      if (decoded == null) continue;
+      if (decoded.payloadType != expectedPayloadType) continue;
+      if (decoded.hopCount != message.pathLen) continue;
 
       final deltaMs =
           (log.timestamp.difference(message.receivedAt).inMilliseconds).abs();
@@ -1290,11 +1289,9 @@ class _MessageBubbleState extends State<MessageBubble> {
 
   List<int>? _extractPathBytesFromLog(BlePacketLog? log) {
     if (log == null) return null;
-    final raw = log.rawData;
-    if (raw.length < 6) return null;
-    final pathLen = raw[4];
-    if (pathLen <= 0 || raw.length < 5 + pathLen) return null;
-    return raw.sublist(5, 5 + pathLen);
+    final decoded = LogRxRouteDecoder.decode(log.rawData);
+    if (decoded == null || decoded.pathBytes.isEmpty) return null;
+    return decoded.pathBytes;
   }
 
   void _showDeleteConfirmation(BuildContext context) {

lib/widgets/messages/message_trace_sheet.dart

@@ -516,13 +516,10 @@ class _MessageTraceSheetState extends State<MessageTraceSheet> {
     for (final log in logs) {
       if (log.responseCode != 0x88) continue; // pushLogRxData
       if (log.rawData.length < 6) continue;
-      final raw = log.rawData;
-      final header = raw[3];
-      final payloadType = (header >> 2) & 0x0F;
-      final pathLen = raw[4];
-      if (payloadType != expectedPayloadType) continue;
-      if (pathLen != message.pathLen) continue;
-      if (raw.length < 5 + pathLen) continue;
+      final decoded = LogRxRouteDecoder.decode(log.rawData);
+      if (decoded == null) continue;
+      if (decoded.payloadType != expectedPayloadType) continue;
+      if (decoded.hopCount != message.pathLen) continue;
 
       final deltaMs =
           (log.timestamp.difference(message.receivedAt).inMilliseconds).abs();
@@ -533,9 +530,11 @@ class _MessageTraceSheetState extends State<MessageTraceSheet> {
     }
 
     if (bestLog == null || bestDeltaMs > 30000) return null;
-    final raw = bestLog.rawData;
-    final pathLen = raw[4];
-    return raw.sublist(5, 5 + pathLen);
+    final decoded = LogRxRouteDecoder.decode(bestLog.rawData);
+    if (decoded == null || decoded.pathBytes.isEmpty) {
+      return null;
+    }
+    return decoded.pathBytes;
   }
 
   List<MeshMapNode?> _matchNodesFromPathHashes({