Simplify theme management, integrate ToggleButtons for theme selection, and enhance settings view structure.

finlog_app/app/ios/Runner.xcodeproj/project.pbxproj

@@ -14,6 +14,8 @@
 		97C146FC1CF9000F007C117D /* Main.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = 97C146FA1CF9000F007C117D /* Main.storyboard */; };
 		97C146FE1CF9000F007C117D /* Assets.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = 97C146FD1CF9000F007C117D /* Assets.xcassets */; };
 		97C147011CF9000F007C117D /* LaunchScreen.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = 97C146FF1CF9000F007C117D /* LaunchScreen.storyboard */; };
+		B4938A305FA6CC3F11C2B360 /* Pods_Runner.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 98DFFE772CFE93B4BC46C9AD /* Pods_Runner.framework */; };
+		F56F832F7C6FCA441762B03C /* Pods_RunnerTests.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 7EF9C1B14BC3FAD925D13606 /* Pods_RunnerTests.framework */; };
 /* End PBXBuildFile section */
 
 /* Begin PBXContainerItemProxy section */
@@ -45,9 +47,13 @@
 		331C807B294A618700263BE5 /* RunnerTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = RunnerTests.swift; sourceTree = "<group>"; };
 		331C8081294A63A400263BE5 /* RunnerTests.xctest */ = {isa = PBXFileReference; explicitFileType = wrapper.cfbundle; includeInIndex = 0; path = RunnerTests.xctest; sourceTree = BUILT_PRODUCTS_DIR; };
 		3B3967151E833CAA004F5970 /* AppFrameworkInfo.plist */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.plist.xml; name = AppFrameworkInfo.plist; path = Flutter/AppFrameworkInfo.plist; sourceTree = "<group>"; };
+		6A9A17806BE49FD019B0DB41 /* Pods-RunnerTests.debug.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-RunnerTests.debug.xcconfig"; path = "Target Support Files/Pods-RunnerTests/Pods-RunnerTests.debug.xcconfig"; sourceTree = "<group>"; };
+		6ACEEED8BD84FC00007A9E9B /* Pods-Runner.debug.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-Runner.debug.xcconfig"; path = "Target Support Files/Pods-Runner/Pods-Runner.debug.xcconfig"; sourceTree = "<group>"; };
+		7081090C6E22D91B12A63D65 /* Pods-Runner.profile.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-Runner.profile.xcconfig"; path = "Target Support Files/Pods-Runner/Pods-Runner.profile.xcconfig"; sourceTree = "<group>"; };
 		74858FAD1ED2DC5600515810 /* Runner-Bridging-Header.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = "Runner-Bridging-Header.h"; sourceTree = "<group>"; };
 		74858FAE1ED2DC5600515810 /* AppDelegate.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = AppDelegate.swift; sourceTree = "<group>"; };
 		7AFA3C8E1D35360C0083082E /* Release.xcconfig */ = {isa = PBXFileReference; lastKnownFileType = text.xcconfig; name = Release.xcconfig; path = Flutter/Release.xcconfig; sourceTree = "<group>"; };
+		7EF9C1B14BC3FAD925D13606 /* Pods_RunnerTests.framework */ = {isa = PBXFileReference; explicitFileType = wrapper.framework; includeInIndex = 0; path = Pods_RunnerTests.framework; sourceTree = BUILT_PRODUCTS_DIR; };
 		9740EEB21CF90195004384FC /* Debug.xcconfig */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.xcconfig; name = Debug.xcconfig; path = Flutter/Debug.xcconfig; sourceTree = "<group>"; };
 		9740EEB31CF90195004384FC /* Generated.xcconfig */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.xcconfig; name = Generated.xcconfig; path = Flutter/Generated.xcconfig; sourceTree = "<group>"; };
 		97C146EE1CF9000F007C117D /* Runner.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = Runner.app; sourceTree = BUILT_PRODUCTS_DIR; };
@@ -55,13 +61,26 @@
 		97C146FD1CF9000F007C117D /* Assets.xcassets */ = {isa = PBXFileReference; lastKnownFileType = folder.assetcatalog; path = Assets.xcassets; sourceTree = "<group>"; };
 		97C147001CF9000F007C117D /* Base */ = {isa = PBXFileReference; lastKnownFileType = file.storyboard; name = Base; path = Base.lproj/LaunchScreen.storyboard; sourceTree = "<group>"; };
 		97C147021CF9000F007C117D /* Info.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist.xml; path = Info.plist; sourceTree = "<group>"; };
+		98DFFE772CFE93B4BC46C9AD /* Pods_Runner.framework */ = {isa = PBXFileReference; explicitFileType = wrapper.framework; includeInIndex = 0; path = Pods_Runner.framework; sourceTree = BUILT_PRODUCTS_DIR; };
+		A4BF9D95DC3AEA839D03722B /* Pods-RunnerTests.profile.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-RunnerTests.profile.xcconfig"; path = "Target Support Files/Pods-RunnerTests/Pods-RunnerTests.profile.xcconfig"; sourceTree = "<group>"; };
+		F43503EB41EB8364AAA6165B /* Pods-Runner.release.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-Runner.release.xcconfig"; path = "Target Support Files/Pods-Runner/Pods-Runner.release.xcconfig"; sourceTree = "<group>"; };
+		FA7CB1383A647C2D24B46844 /* Pods-RunnerTests.release.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-RunnerTests.release.xcconfig"; path = "Target Support Files/Pods-RunnerTests/Pods-RunnerTests.release.xcconfig"; sourceTree = "<group>"; };
 /* End PBXFileReference section */
 
 /* Begin PBXFrameworksBuildPhase section */
+		0D70F078EEFD111D42BA3C5C /* Frameworks */ = {
+			isa = PBXFrameworksBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+				F56F832F7C6FCA441762B03C /* Pods_RunnerTests.framework in Frameworks */,
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+		};
 		97C146EB1CF9000F007C117D /* Frameworks */ = {
 			isa = PBXFrameworksBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
+				B4938A305FA6CC3F11C2B360 /* Pods_Runner.framework in Frameworks */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
@@ -94,6 +113,8 @@
 				97C146F01CF9000F007C117D /* Runner */,
 				97C146EF1CF9000F007C117D /* Products */,
 				331C8082294A63A400263BE5 /* RunnerTests */,
+				DA4F95BDE713E57F5B145DB1 /* Pods */,
+				CA36834C8F3CDFB7D8CB9171 /* Frameworks */,
 			);
 			sourceTree = "<group>";
 		};
@@ -121,6 +142,29 @@
 			path = Runner;
 			sourceTree = "<group>";
 		};
+		CA36834C8F3CDFB7D8CB9171 /* Frameworks */ = {
+			isa = PBXGroup;
+			children = (
+				98DFFE772CFE93B4BC46C9AD /* Pods_Runner.framework */,
+				7EF9C1B14BC3FAD925D13606 /* Pods_RunnerTests.framework */,
+			);
+			name = Frameworks;
+			sourceTree = "<group>";
+		};
+		DA4F95BDE713E57F5B145DB1 /* Pods */ = {
+			isa = PBXGroup;
+			children = (
+				6ACEEED8BD84FC00007A9E9B /* Pods-Runner.debug.xcconfig */,
+				F43503EB41EB8364AAA6165B /* Pods-Runner.release.xcconfig */,
+				7081090C6E22D91B12A63D65 /* Pods-Runner.profile.xcconfig */,
+				6A9A17806BE49FD019B0DB41 /* Pods-RunnerTests.debug.xcconfig */,
+				FA7CB1383A647C2D24B46844 /* Pods-RunnerTests.release.xcconfig */,
+				A4BF9D95DC3AEA839D03722B /* Pods-RunnerTests.profile.xcconfig */,
+			);
+			name = Pods;
+			path = Pods;
+			sourceTree = "<group>";
+		};
 /* End PBXGroup section */
 
 /* Begin PBXNativeTarget section */
@@ -128,8 +172,10 @@
 			isa = PBXNativeTarget;
 			buildConfigurationList = 331C8087294A63A400263BE5 /* Build configuration list for PBXNativeTarget "RunnerTests" */;
 			buildPhases = (
+				522EC1B060427CA49FA9A954 /* [CP] Check Pods Manifest.lock */,
 				331C807D294A63A400263BE5 /* Sources */,
 				331C807F294A63A400263BE5 /* Resources */,
+				0D70F078EEFD111D42BA3C5C /* Frameworks */,
 			);
 			buildRules = (
 			);
@@ -145,12 +191,14 @@
 			isa = PBXNativeTarget;
 			buildConfigurationList = 97C147051CF9000F007C117D /* Build configuration list for PBXNativeTarget "Runner" */;
 			buildPhases = (
+				6E3C45D3F1E98809BC13B1B5 /* [CP] Check Pods Manifest.lock */,
 				9740EEB61CF901F6004384FC /* Run Script */,
 				97C146EA1CF9000F007C117D /* Sources */,
 				97C146EB1CF9000F007C117D /* Frameworks */,
 				97C146EC1CF9000F007C117D /* Resources */,
 				9705A1C41CF9048500538489 /* Embed Frameworks */,
 				3B06AD1E1E4923F5004D2608 /* Thin Binary */,
+				8F7BBF6E33A45DC857BA490D /* [CP] Embed Pods Frameworks */,
 			);
 			buildRules = (
 			);
@@ -238,6 +286,67 @@
 			shellPath = /bin/sh;
 			shellScript = "/bin/sh \"$FLUTTER_ROOT/packages/flutter_tools/bin/xcode_backend.sh\" embed_and_thin";
 		};
+		522EC1B060427CA49FA9A954 /* [CP] Check Pods Manifest.lock */ = {
+			isa = PBXShellScriptBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			inputFileListPaths = (
+			);
+			inputPaths = (
+				"${PODS_PODFILE_DIR_PATH}/Podfile.lock",
+				"${PODS_ROOT}/Manifest.lock",
+			);
+			name = "[CP] Check Pods Manifest.lock";
+			outputFileListPaths = (
+			);
+			outputPaths = (
+				"$(DERIVED_FILE_DIR)/Pods-RunnerTests-checkManifestLockResult.txt",
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+			shellPath = /bin/sh;
+			shellScript = "diff \"${PODS_PODFILE_DIR_PATH}/Podfile.lock\" \"${PODS_ROOT}/Manifest.lock\" > /dev/null\nif [ $? != 0 ] ; then\n    # print error to STDERR\n    echo \"error: The sandbox is not in sync with the Podfile.lock. Run 'pod install' or update your CocoaPods installation.\" >&2\n    exit 1\nfi\n# This output is used by Xcode 'outputs' to avoid re-running this script phase.\necho \"SUCCESS\" > \"${SCRIPT_OUTPUT_FILE_0}\"\n";
+			showEnvVarsInLog = 0;
+		};
+		6E3C45D3F1E98809BC13B1B5 /* [CP] Check Pods Manifest.lock */ = {
+			isa = PBXShellScriptBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			inputFileListPaths = (
+			);
+			inputPaths = (
+				"${PODS_PODFILE_DIR_PATH}/Podfile.lock",
+				"${PODS_ROOT}/Manifest.lock",
+			);
+			name = "[CP] Check Pods Manifest.lock";
+			outputFileListPaths = (
+			);
+			outputPaths = (
+				"$(DERIVED_FILE_DIR)/Pods-Runner-checkManifestLockResult.txt",
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+			shellPath = /bin/sh;
+			shellScript = "diff \"${PODS_PODFILE_DIR_PATH}/Podfile.lock\" \"${PODS_ROOT}/Manifest.lock\" > /dev/null\nif [ $? != 0 ] ; then\n    # print error to STDERR\n    echo \"error: The sandbox is not in sync with the Podfile.lock. Run 'pod install' or update your CocoaPods installation.\" >&2\n    exit 1\nfi\n# This output is used by Xcode 'outputs' to avoid re-running this script phase.\necho \"SUCCESS\" > \"${SCRIPT_OUTPUT_FILE_0}\"\n";
+			showEnvVarsInLog = 0;
+		};
+		8F7BBF6E33A45DC857BA490D /* [CP] Embed Pods Frameworks */ = {
+			isa = PBXShellScriptBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			inputFileListPaths = (
+				"${PODS_ROOT}/Target Support Files/Pods-Runner/Pods-Runner-frameworks-${CONFIGURATION}-input-files.xcfilelist",
+			);
+			name = "[CP] Embed Pods Frameworks";
+			outputFileListPaths = (
+				"${PODS_ROOT}/Target Support Files/Pods-Runner/Pods-Runner-frameworks-${CONFIGURATION}-output-files.xcfilelist",
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+			shellPath = /bin/sh;
+			shellScript = "\"${PODS_ROOT}/Target Support Files/Pods-Runner/Pods-Runner-frameworks.sh\"\n";
+			showEnvVarsInLog = 0;
+		};
 		9740EEB61CF901F6004384FC /* Run Script */ = {
 			isa = PBXShellScriptBuildPhase;
 			alwaysOutOfDate = 1;
@@ -378,6 +487,7 @@
 		};
 		331C8088294A63A400263BE5 /* Debug */ = {
 			isa = XCBuildConfiguration;
+			baseConfigurationReference = 6A9A17806BE49FD019B0DB41 /* Pods-RunnerTests.debug.xcconfig */;
 			buildSettings = {
 				BUNDLE_LOADER = "$(TEST_HOST)";
 				CODE_SIGN_STYLE = Automatic;
@@ -395,6 +505,7 @@
 		};
 		331C8089294A63A400263BE5 /* Release */ = {
 			isa = XCBuildConfiguration;
+			baseConfigurationReference = FA7CB1383A647C2D24B46844 /* Pods-RunnerTests.release.xcconfig */;
 			buildSettings = {
 				BUNDLE_LOADER = "$(TEST_HOST)";
 				CODE_SIGN_STYLE = Automatic;
@@ -410,6 +521,7 @@
 		};
 		331C808A294A63A400263BE5 /* Profile */ = {
 			isa = XCBuildConfiguration;
+			baseConfigurationReference = A4BF9D95DC3AEA839D03722B /* Pods-RunnerTests.profile.xcconfig */;
 			buildSettings = {
 				BUNDLE_LOADER = "$(TEST_HOST)";
 				CODE_SIGN_STYLE = Automatic;

finlog_app/app/ios/Runner.xcworkspace/contents.xcworkspacedata

@@ -4,4 +4,7 @@
    <FileRef
       location = "group:Runner.xcodeproj">
    </FileRef>
+   <FileRef
+      location = "group:Pods/Pods.xcodeproj">
+   </FileRef>
 </Workspace>

finlog_app/app/lib/core/app/theme.dart

@@ -25,10 +25,10 @@ class ThemeController extends ChangeNotifier {
   }
 
   /// Sets theme and persists it in Preferences.
-  Future<void> setTheme(ThemeMode mode) async {
+  void setTheme(ThemeMode mode) {
     _themeMode = mode;
     notifyListeners();
-    await _prefs.setString('theme', _toString(mode));
+    _prefs.setString('theme', mode.name);
   }
 
   ThemeMode _fromString(String value) {
@@ -43,16 +43,5 @@ class ThemeController extends ChangeNotifier {
     }
   }
 
-  String _toString(ThemeMode mode) {
-    switch (mode) {
-      case ThemeMode.light:
-        return 'light';
-      case ThemeMode.dark:
-        return 'dark';
-      case ThemeMode.system:
-        return 'system';
-    }
-  }
-
   ThemeMode get themeMode => _themeMode;
 }

finlog_app/app/lib/main.dart

@@ -5,6 +5,7 @@ import 'package:flutter/material.dart';
 import 'package:fluttery/fluttery.dart';
 import 'package:fluttery/logger.dart';
 import 'package:go_router/go_router.dart';
+import 'package:provider/provider.dart';
 
 Future<void> main() async {
   // Ensures that the Flutter engine and widget binding
@@ -25,10 +26,13 @@ Future<void> main() async {
   await themeController.init();
 
   runApp(
-    FinlogApp(
+    MultiProvider(
+      providers: [ChangeNotifierProvider(create: (context) => themeController)],
+      child: FinlogApp(
         router: buildAppRouter(startRoute),
         themeController: themeController,
       ),
+    ),
   );
 }
 

finlog_app/app/lib/modules/settings/modules/app/app_settings_view.dart

@@ -1,5 +1,5 @@
+import 'package:app/core/app/theme.dart';
 import 'package:app/modules/settings/modules/app/model/app_settings_view_model.dart';
-
 import 'package:flutter/material.dart';
 import 'package:provider/provider.dart';
 
@@ -8,8 +8,9 @@ class AppSettingsView extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
+    final themeModel = context.watch<ThemeController>();
     return ChangeNotifierProvider(
-      create: (_) => AppSettingsViewModel()..load(),
+      create: (_) => AppSettingsViewModel(themeModel: themeModel)..load(),
       child: const _AppSettingsContent(),
     );
   }
@@ -38,8 +39,6 @@ class _AppSettingsContent extends StatelessWidget {
                 _TextSizeSection(),
                 const SizedBox(height: 16),
                 _LanguageSection(),
-                const SizedBox(height: 24),
-                _SaveButton(),
               ],
             ),
           ),
@@ -49,102 +48,74 @@ class _AppSettingsContent extends StatelessWidget {
 }
 
 class _SystemBackgroundSection extends StatelessWidget {
+  const _SystemBackgroundSection();
+
   @override
   Widget build(BuildContext context) {
     final vm = context.watch<AppSettingsViewModel>();
-    final scheme = Theme.of(context).colorScheme;
+    final selected = vm.themeMode;
-
-    // A few pleasant presets; extend as needed.
-    final presets = <Color>[
-      const Color(0xFFFFFFFF),
-      const Color(0xFFF5F5F5),
-      const Color(0xFF121212),
-      const Color(0xFF1E1E1E),
-      Colors.blueGrey.shade50,
-      Colors.blueGrey.shade900,
-    ];
-
-    final isSystem = vm.backgroundColorSystem == null;
-    final selected = vm.backgroundColorSystem;
-
-    Widget chip({
-      required Widget child,
-      required bool selected,
-      required VoidCallback onTap,
-    }) {
-      return InkWell(
-        borderRadius: BorderRadius.circular(22),
-        onTap: onTap,
-        child: Container(
-          padding: const EdgeInsets.symmetric(horizontal: 12, vertical: 8),
-          decoration: BoxDecoration(
-            borderRadius: BorderRadius.circular(22),
-            border: Border.all(
-              color: selected ? scheme.primary : scheme.outlineVariant,
-            ),
-          ),
-          child: child,
-        ),
-      );
-    }
 
     return Column(
       crossAxisAlignment: CrossAxisAlignment.start,
       children: [
-        Text(
+        const Text(
           'System-Hintergrundfarbe',
-          style: Theme.of(context).textTheme.titleMedium,
+          style: TextStyle(fontSize: 16, fontWeight: FontWeight.w600),
         ),
-        const SizedBox(height: 8),
+        const SizedBox(height: 10),
-        Wrap(
+
-          spacing: 8,
+        ToggleButtons(
-          runSpacing: 8,
+          isSelected: [
-          children: [
+            selected == ThemeMode.system,
-            chip(
+            selected == ThemeMode.dark,
+            selected == ThemeMode.light,
+          ],
+          onPressed: (i) {
+            switch (i) {
+              case 0:
+                vm.setBackgroundPref(ThemeMode.system);
+                break;
+              case 1:
+                vm.setBackgroundPref(ThemeMode.dark);
+                break;
+              case 2:
+                vm.setBackgroundPref(ThemeMode.light);
+                break;
+            }
+          },
+          borderRadius: BorderRadius.circular(24),
+          constraints: const BoxConstraints(minHeight: 44, minWidth: 140),
+          children: const [
+            _SegItem(icon: Icons.phone_iphone, label: 'Systemstandard'),
+            _SegItem(emoji: '🌙', label: 'Dark Mode'),
+            _SegItem(emoji: '☀️', label: 'White Mode'),
+          ],
+        ),
+      ],
+    );
+  }
+}
+
+class _SegItem extends StatelessWidget {
+  final IconData? icon;
+  final String? emoji;
+  final String label;
+
+  const _SegItem({this.icon, this.emoji, required this.label});
+
+  @override
+  Widget build(BuildContext context) {
+    return Padding(
+      padding: const EdgeInsets.symmetric(horizontal: 12),
       child: Row(
         mainAxisSize: MainAxisSize.min,
         children: [
-                  const Icon(Icons.phone_android, size: 18),
+          if (icon != null) Icon(icon, size: 18),
-                  const SizedBox(width: 6),
+          if (emoji != null) Text(emoji!, style: const TextStyle(fontSize: 18)),
-                  Text(
+          const SizedBox(width: 8),
-                    'Systemstandard',
+          Text(label),
-                    style: Theme.of(context).textTheme.bodyMedium,
-                  ),
         ],
       ),
-              selected: isSystem,
-              onTap: () => vm.setSystemBackgroundColor(null),
-            ),
-            ...presets.map((c) {
-              final bool sel = selected == c;
-              return GestureDetector(
-                onTap: () => vm.setSystemBackgroundColor(c),
-                child: Container(
-                  width: 40,
-                  height: 40,
-                  decoration: BoxDecoration(
-                    color: c,
-                    shape: BoxShape.circle,
-                    border: Border.all(
-                      color: sel ? scheme.primary : scheme.outlineVariant,
-                      width: sel ? 2 : 1,
-                    ),
-                  ),
-                ),
-              );
-            }),
-          ],
-        ),
-        const SizedBox(height: 4),
-        Text(
-          isSystem
-              ? 'Aktuell: Systemstandard'
-              : 'Aktuell: Benutzerdefinierte Farbe',
-          style: Theme.of(
-            context,
-          ).textTheme.bodySmall?.copyWith(color: scheme.outline),
-        ),
-      ],
     );
   }
 }
@@ -212,31 +183,3 @@ class _LanguageSection extends StatelessWidget {
     );
   }
 }
-
-class _SaveButton extends StatelessWidget {
-  @override
-  Widget build(BuildContext context) {
-    final vm = context.watch<AppSettingsViewModel>();
-
-    return FilledButton.icon(
-      onPressed: vm.isSaving
-          ? null
-          : () async {
-              await vm.save();
-              if (context.mounted) {
-                ScaffoldMessenger.of(context).showSnackBar(
-                  const SnackBar(content: Text('Einstellungen gespeichert')),
-                );
-              }
-            },
-      icon: vm.isSaving
-          ? const SizedBox(
-              width: 18,
-              height: 18,
-              child: CircularProgressIndicator(strokeWidth: 2),
-            )
-          : const Icon(Icons.save_outlined),
-      label: const Text('Speichern'),
-    );
-  }
-}

finlog_app/app/lib/modules/settings/modules/app/model/app_settings_view_model.dart

@@ -1,3 +1,4 @@
+import 'package:app/core/app/theme.dart';
 import 'package:flutter/material.dart';
 
 /// Domain-ish enums for clarity and easy (de)serialization.
@@ -14,15 +15,10 @@ class AppSettingsViewModel extends ChangeNotifier {
   bool _isLoading = false;
   bool _isSaving = false;
 
-  Color? get backgroundColorSystem => _backgroundColorSystem;
+  final ThemeController _theme;
 
-  AppTextSize get textSize => _textSize;
+  AppSettingsViewModel({required ThemeController themeModel})
-
+    : _theme = themeModel;
-  AppLanguage get language => _language;
-
-  bool get isLoading => _isLoading;
-
-  bool get isSaving => _isSaving;
 
   /// Pretend to load from backend. Plug your repository here later.
   Future<void> load() async {
@@ -41,6 +37,11 @@ class AppSettingsViewModel extends ChangeNotifier {
     notifyListeners();
   }
 
+  void setBackgroundPref(ThemeMode mode) {
+    _theme.setTheme(mode);
+    notifyListeners();
+  }
+
   /// Save to backend (stub).
   Future<void> save() async {
     if (_isSaving) return;
@@ -71,7 +72,6 @@ class AppSettingsViewModel extends ChangeNotifier {
 
   Map<String, dynamic> toJson() => {
     'backgroundColorSystem': _backgroundColorSystem?.value,
-    // null => system
     'textSize': _textSize.name,
     'language': _language.name,
   };
@@ -94,4 +94,16 @@ class AppSettingsViewModel extends ChangeNotifier {
 
     notifyListeners();
   }
+
+  ThemeMode get themeMode => _theme.themeMode;
+
+  Color? get backgroundColorSystem => _backgroundColorSystem;
+
+  AppTextSize get textSize => _textSize;
+
+  AppLanguage get language => _language;
+
+  bool get isLoading => _isLoading;
+
+  bool get isSaving => _isSaving;
 }