Refactor

lib/core/theme/theme_preferences.dart

@@ -0,0 +1,26 @@
+import 'package:hiddify/core/preferences/preferences_provider.dart';
+import 'package:hiddify/core/theme/app_theme_mode.dart';
+import 'package:riverpod_annotation/riverpod_annotation.dart';
+
+part 'theme_preferences.g.dart';
+
+@Riverpod(keepAlive: true)
+class ThemePreferences extends _$ThemePreferences {
+  @override
+  AppThemeMode build() {
+    final persisted = ref
+        .watch(sharedPreferencesProvider)
+        .requireValue
+        .getString("theme_mode");
+    if (persisted == null) return AppThemeMode.system;
+    return AppThemeMode.values.byName(persisted);
+  }
+
+  Future<void> changeThemeMode(AppThemeMode value) async {
+    state = value;
+    await ref
+        .read(sharedPreferencesProvider)
+        .requireValue
+        .setString("theme_mode", value.name);
+  }
+}