fix tracepath

test/models/model_changes_test.dart

@@ -12,6 +12,8 @@ import 'package:meshcore_open/models/app_settings.dart';
 import 'package:meshcore_open/storage/prefs_manager.dart';
 import 'package:meshcore_open/storage/contact_store.dart';
 import 'package:meshcore_open/storage/message_store.dart';
+import 'package:meshcore_open/storage/channel_message_store.dart';
+import 'package:meshcore_open/storage/contact_discovery_store.dart';
 
 // Builds a valid contact frame with the given pathLen and optional overrides.
 // Frame layout: [respCode(1)][pubKey(32)][type(1)][flags(1)][pathLen(1)][path(64)][name(32)][timestamp(4)][lat(4)][lon(4)]
@@ -553,5 +555,59 @@ void main() {
       expect(messages.first.pathLength, equals(0));
       expect(messages.first.pathBytes, isEmpty);
     });
+
+    test('ChannelMessageStore decodes and migrates legacy mode-encoded paths', () async {
+      final store = ChannelMessageStore()..publicKeyHex = '1234567890';
+      final channelIndex = 1;
+      
+      final rawPath = Uint8List(64)..[0] = 0xBB..[1] = 0xCC; 
+      final messageJson = [
+        {
+          'senderName': 'Alice',
+          'text': 'Hello',
+          'timestamp': DateTime.now().millisecondsSinceEpoch,
+          'isOutgoing': false,
+          'status': 2,
+          'channelIndex': channelIndex,
+          'pathLength': 65, // encoded pathLength (mode 1, 1 hop)
+          'pathBytes': base64Encode(rawPath),
+        }
+      ];
+      
+      final prefs = PrefsManager.instance;
+      await prefs.setString('${store.keyFor}$channelIndex', jsonEncode(messageJson));
+      
+      final messages = await store.loadChannelMessages(channelIndex);
+      expect(messages, hasLength(1));
+      expect(messages.first.pathLength, equals(1));
+      expect(messages.first.pathBytes, equals(Uint8List.fromList([0xBB, 0xCC])));
+      expect(messages.first.pathHashWidth, equals(2));
+    });
+
+    test('ContactDiscoveryStore decodes and migrates legacy mode-encoded paths', () async {
+      final store = ContactDiscoveryStore();
+      
+      final rawPath = Uint8List(64)..[0] = 0x11..[1] = 0x22;
+      final contactJson = [
+        {
+          'publicKey': base64Encode(Uint8List(32)..[0] = 0xBB),
+          'name': 'DiscoveredNode',
+          'type': 1,
+          'flags': 0,
+          'pathLength': 65, // encoded pathLength (mode 1, 1 hop)
+          'path': base64Encode(rawPath),
+          'lastSeen': DateTime.now().millisecondsSinceEpoch,
+          'lastMessageAt': DateTime.now().millisecondsSinceEpoch,
+        }
+      ];
+      
+      final prefs = PrefsManager.instance;
+      await prefs.setString('discovered_contacts', jsonEncode(contactJson));
+      
+      final contacts = await store.loadContacts();
+      expect(contacts, hasLength(1));
+      expect(contacts.first.pathLength, equals(1));
+      expect(contacts.first.path, equals(Uint8List.fromList([0x11, 0x22])));
+    });
   });
 }