Add profile storage and sync

lib/screens/device_config_screen.dart

@@ -342,6 +342,21 @@ class _DeviceConfigScreenState extends State<DeviceConfigScreen> {
     });
   }
 
+  void _syncRadioPresetSelection() {
+    final freqResult = ValidationService().parseFrequency(_freqController.text);
+    final matchedPreset = freqResult.isSuccess
+        ? _matchRadioPreset(
+            frequencyKhz: (freqResult.value! * 1000).round(),
+            bandwidth: _bandwidthToValue(_selectedBandwidth),
+            spreadingFactor: _selectedSpreadingFactor,
+            codingRate: _selectedCodingRate,
+          )
+        : null;
+
+    _selectedRadioPreset = matchedPreset;
+    _showCustomRadioSettings = matchedPreset == null;
+  }
+
   void _markPublicInfoDirty() {
     if (_publicInfoSaved || _publicInfoError != null) {
       setState(() {
@@ -902,6 +917,7 @@ class _DeviceConfigScreenState extends State<DeviceConfigScreen> {
                   crossAxisAlignment: CrossAxisAlignment.start,
                   children: [
                     DropdownButtonFormField<_RadioPreset?>(
+                      key: ValueKey(_selectedRadioPreset?.id ?? 'custom'),
                       initialValue: _selectedRadioPreset,
                       decoration: InputDecoration(
                         labelText: 'Radio preset',
@@ -993,16 +1009,13 @@ class _DeviceConfigScreenState extends State<DeviceConfigScreen> {
                               decimal: true,
                             ),
                             onChanged: (_) {
-                              if (_selectedRadioPreset != null) {
+                              setState(_syncRadioPresetSelection);
-                                setState(() {
-                                  _selectedRadioPreset = null;
-                                });
-                              }
                               _markRadioSettingsDirty();
                             },
                           ),
                           const SizedBox(height: 16),
                           DropdownButtonFormField<String>(
+                            key: ValueKey('bandwidth-$_selectedBandwidth'),
                             initialValue: _selectedBandwidth,
                             decoration: InputDecoration(
                               labelText: AppLocalizations.of(
@@ -1024,7 +1037,7 @@ class _DeviceConfigScreenState extends State<DeviceConfigScreen> {
                               if (newValue != null) {
                                 setState(() {
                                   _selectedBandwidth = newValue;
-                                  _selectedRadioPreset = null;
+                                  _syncRadioPresetSelection();
                                 });
                                 _markRadioSettingsDirty();
                               }
@@ -1032,6 +1045,9 @@ class _DeviceConfigScreenState extends State<DeviceConfigScreen> {
                           ),
                           const SizedBox(height: 16),
                           DropdownButtonFormField<int>(
+                            key: ValueKey(
+                              'spreading-factor-$_selectedSpreadingFactor',
+                            ),
                             initialValue: _selectedSpreadingFactor,
                             decoration: InputDecoration(
                               labelText: AppLocalizations.of(
@@ -1055,7 +1071,7 @@ class _DeviceConfigScreenState extends State<DeviceConfigScreen> {
                               if (newValue != null) {
                                 setState(() {
                                   _selectedSpreadingFactor = newValue;
-                                  _selectedRadioPreset = null;
+                                  _syncRadioPresetSelection();
                                 });
                                 _markRadioSettingsDirty();
                               }
@@ -1063,6 +1079,7 @@ class _DeviceConfigScreenState extends State<DeviceConfigScreen> {
                           ),
                           const SizedBox(height: 16),
                           DropdownButtonFormField<int>(
+                            key: ValueKey('coding-rate-$_selectedCodingRate'),
                             initialValue: _selectedCodingRate,
                             decoration: InputDecoration(
                               labelText: AppLocalizations.of(
@@ -1086,7 +1103,7 @@ class _DeviceConfigScreenState extends State<DeviceConfigScreen> {
                               if (newValue != null) {
                                 setState(() {
                                   _selectedCodingRate = newValue;
-                                  _selectedRadioPreset = null;
+                                  _syncRadioPresetSelection();
                                 });
                                 _markRadioSettingsDirty();
                               }

lib/screens/settings_screen.dart

@@ -1260,156 +1260,6 @@ class _SettingsScreenState extends State<SettingsScreen> {
               ),
             ),
           ]),
-          _buildSettingsCard([
-            ListTile(
-              leading: const Icon(Icons.layers_outlined),
-              title: const Text('Rendering'),
-              subtitle: const Text(
-                'Control map drawings and overlay layers used by the renderer',
-              ),
-            ),
-            Consumer<DrawingProvider>(
-              builder: (context, drawingProvider, child) => SwitchListTile(
-                secondary: const Icon(Icons.draw_outlined),
-                title: Text(AppLocalizations.of(context)!.showReceivedDrawings),
-                subtitle: const Text(
-                  'Render drawings received from other devices on the map',
-                ),
-                value: drawingProvider.showReceivedDrawings,
-                onChanged: (value) async {
-                  await drawingProvider.toggleReceivedDrawings();
-                },
-              ),
-            ),
-            Consumer<MapProvider>(
-              builder: (context, mapProvider, child) => SwitchListTile(
-                secondary: const Icon(Icons.grid_on, color: Colors.blue),
-                title: Text(AppLocalizations.of(context)!.cadastralParcels),
-                subtitle: const Text('WMS overlay'),
-                value: mapProvider.showCadastralOverlay,
-                onChanged: (value) async {
-                  await mapProvider.toggleCadastralOverlay();
-                },
-              ),
-            ),
-            Consumer<MapProvider>(
-              builder: (context, mapProvider, child) => SwitchListTile(
-                secondary: const Icon(Icons.route, color: Colors.green),
-                title: Text(AppLocalizations.of(context)!.forestRoads),
-                subtitle: const Text('WMS overlay'),
-                value: mapProvider.showForestRoadsOverlay,
-                onChanged: (value) async {
-                  await mapProvider.toggleForestRoadsOverlay();
-                },
-              ),
-            ),
-            Consumer<MapProvider>(
-              builder: (context, mapProvider, child) => SwitchListTile(
-                secondary: const Icon(Icons.hiking, color: Colors.brown),
-                title: Text(AppLocalizations.of(context)!.hikingTrails),
-                subtitle: const Text('WMS overlay'),
-                value: mapProvider.showHikingTrailsOverlay,
-                onChanged: (value) async {
-                  await mapProvider.toggleHikingTrailsOverlay();
-                },
-              ),
-            ),
-            Consumer<MapProvider>(
-              builder: (context, mapProvider, child) => SwitchListTile(
-                secondary: const Icon(Icons.alt_route, color: Colors.grey),
-                title: Text(AppLocalizations.of(context)!.mainRoads),
-                subtitle: const Text('WMS overlay'),
-                value: mapProvider.showMainRoadsOverlay,
-                onChanged: (value) async {
-                  await mapProvider.toggleMainRoadsOverlay();
-                },
-              ),
-            ),
-            Consumer<MapProvider>(
-              builder: (context, mapProvider, child) => SwitchListTile(
-                secondary: const Icon(Icons.numbers, color: Colors.purple),
-                title: Text(AppLocalizations.of(context)!.houseNumbers),
-                subtitle: const Text('WMS overlay'),
-                value: mapProvider.showHouseNumbersOverlay,
-                onChanged: (value) async {
-                  await mapProvider.toggleHouseNumbersOverlay();
-                },
-              ),
-            ),
-            Consumer<MapProvider>(
-              builder: (context, mapProvider, child) => SwitchListTile(
-                secondary: const Icon(
-                  Icons.warning_amber,
-                  color: Colors.orange,
-                ),
-                title: Text(AppLocalizations.of(context)!.fireHazardZones),
-                subtitle: const Text('WMS overlay'),
-                value: mapProvider.showFireHazardZonesOverlay,
-                onChanged: (value) async {
-                  await mapProvider.toggleFireHazardZonesOverlay();
-                },
-              ),
-            ),
-            Consumer<MapProvider>(
-              builder: (context, mapProvider, child) => SwitchListTile(
-                secondary: const Icon(
-                  Icons.local_fire_department,
-                  color: Colors.red,
-                ),
-                title: Text(AppLocalizations.of(context)!.historicalFires),
-                subtitle: const Text('WMS overlay'),
-                value: mapProvider.showHistoricalFiresOverlay,
-                onChanged: (value) async {
-                  await mapProvider.toggleHistoricalFiresOverlay();
-                },
-              ),
-            ),
-            Consumer<MapProvider>(
-              builder: (context, mapProvider, child) => SwitchListTile(
-                secondary: const Icon(Icons.forest, color: Colors.teal),
-                title: Text(AppLocalizations.of(context)!.firebreaks),
-                subtitle: const Text('WMS overlay'),
-                value: mapProvider.showFirebreaksOverlay,
-                onChanged: (value) async {
-                  await mapProvider.toggleFirebreaksOverlay();
-                },
-              ),
-            ),
-            Consumer<MapProvider>(
-              builder: (context, mapProvider, child) => SwitchListTile(
-                secondary: const Icon(Icons.warning, color: Colors.deepOrange),
-                title: Text(AppLocalizations.of(context)!.krasFireZones),
-                subtitle: const Text('WMS overlay'),
-                value: mapProvider.showKrasFireZonesOverlay,
-                onChanged: (value) async {
-                  await mapProvider.toggleKrasFireZonesOverlay();
-                },
-              ),
-            ),
-            Consumer<MapProvider>(
-              builder: (context, mapProvider, child) => SwitchListTile(
-                secondary: const Icon(Icons.place, color: Colors.indigo),
-                title: Text(AppLocalizations.of(context)!.placeNames),
-                subtitle: const Text('WMS overlay'),
-                value: mapProvider.showPlaceNamesOverlay,
-                onChanged: (value) async {
-                  await mapProvider.togglePlaceNamesOverlay();
-                },
-              ),
-            ),
-            Consumer<MapProvider>(
-              builder: (context, mapProvider, child) => SwitchListTile(
-                secondary: const Icon(Icons.border_outer, color: Colors.cyan),
-                title: Text(AppLocalizations.of(context)!.municipalityBorders),
-                subtitle: const Text('WMS overlay'),
-                value: mapProvider.showMunicipalityBordersOverlay,
-                onChanged: (value) async {
-                  await mapProvider.toggleMunicipalityBordersOverlay();
-                },
-              ),
-            ),
-          ]),
-
           _buildSectionHeader('Voice'),
           Consumer2<AppProvider, ConnectionProvider>(
             builder: (context, appProvider, connectionProvider, child) =>