refactor(connector): adjust frame length check and simplify contact handling logic

refactor(settings): extract settings sending logic into a separate method
refactor(ble_debug_log_service): remove unused command case for radio settings
refactor(app_bar): update compact width threshold for app bar display

lib/connector/meshcore_connector.dart

@@ -2060,7 +2060,7 @@ class MeshCoreConnector extends ChangeNotifier {
     _selfLatitude = readInt32LE(frame, 36) / 1000000.0;
     _selfLongitude = readInt32LE(frame, 40) / 1000000.0;
 
-    if (frame.length >= 47 && frame[47] == 0x00) {
+    if (frame.length >= 48 && frame[47] == 0x00) {
       sendFrame(buildSetOtherParamsFrame(0, 0, 0));
     }
 
@@ -3947,17 +3947,6 @@ class MeshCoreConnector extends ChangeNotifier {
     final existingIndex = _discoveredContacts.indexWhere(
       (c) => c.publicKeyHex == contact.publicKeyHex,
     );
-    final existingContactsIndex = _contacts.indexWhere(
-      (c) => c.publicKeyHex == contact.publicKeyHex,
-    );
-
-    if (existingContactsIndex >= 0) {
-      if (existingIndex >= 0) {
-        removeDiscoveredContact(_discoveredContacts[existingIndex]);
-        unawaited(_persistDiscoveredContacts());
-      }
-      return;
-    }
 
     // Update existing contact
     if (existingIndex >= 0) {
@@ -3972,6 +3961,7 @@ class MeshCoreConnector extends ChangeNotifier {
             longitude: contact.longitude,
             lastSeen: contact.lastSeen,
           );
+      notifyListeners();
       return;
     }
 

lib/screens/settings_screen.dart

@@ -938,16 +938,15 @@ class _SettingsScreenState extends State<SettingsScreen> {
               child: Text(l10n.common_cancel),
             ),
             TextButton(
-              onPressed: () async {
-                final frame = buildSetAutoAddConfigFrame(
-                  autoAddChat: autoAddChat,
-                  autoAddRepeater: autoAddRepeater,
-                  autoAddRoomServer: autoAddRoomServer,
-                  autoAddSensor: autoAddSensor,
-                  overwriteOldest: overwriteOldest,
+              onPressed: () {
+                _sendSettings(
+                  connector,
+                  autoAddChat,
+                  autoAddRepeater,
+                  autoAddRoomServer,
+                  autoAddSensor,
+                  overwriteOldest,
                 );
-                await connector.sendFrame(frame);
-                await connector.sendFrame(buildGetAutoAddFlagsFrame());
                 Navigator.pop(context);
               },
               child: Text(l10n.common_save),
@@ -957,6 +956,25 @@ class _SettingsScreenState extends State<SettingsScreen> {
       ),
     );
   }
+
+  void _sendSettings(
+    MeshCoreConnector connector,
+    autoAddChat,
+    autoAddRepeater,
+    autoAddRoomServer,
+    autoAddSensor,
+    overwriteOldest,
+  ) async {
+    final frame = buildSetAutoAddConfigFrame(
+      autoAddChat: autoAddChat,
+      autoAddRepeater: autoAddRepeater,
+      autoAddRoomServer: autoAddRoomServer,
+      autoAddSensor: autoAddSensor,
+      overwriteOldest: overwriteOldest,
+    );
+    await connector.sendFrame(frame);
+    await connector.sendFrame(buildGetAutoAddFlagsFrame());
+  }
 }
 
 class _RadioSettingsDialog extends StatefulWidget {

lib/services/ble_debug_log_service.dart

@@ -172,8 +172,6 @@ class BleDebugLogService extends ChangeNotifier {
         return 'CMD_GET_CHANNEL';
       case cmdSetChannel:
         return 'CMD_SET_CHANNEL';
-      case cmdGetRadioSettings:
-        return 'CMD_GET_RADIO_SETTINGS';
       case cmdSetCustomVar:
         return 'CMD_SET_CUSTOM_VAR';
       case cmdSendTracePath:

lib/widgets/app_bar.dart

@@ -30,7 +30,7 @@ class AppBarTitle extends StatelessWidget {
         final availableWidth = constraints.hasBoundedWidth
             ? constraints.maxWidth
             : MediaQuery.sizeOf(context).width;
-        final compact = availableWidth < 240;
+        final compact = availableWidth < 170;
         final showSubtitle =
             !compact && connector.isConnected && selfName != null && subtitle;
         final showBattery = availableWidth >= 60;