improved performance and battery usage on older devices

lib/model/session_wipe.dart

@@ -8,6 +8,7 @@ import 'package:hydrated_bloc/hydrated_bloc.dart';
 import 'package:path_provider/path_provider.dart';
 import 'package:shared_preferences/shared_preferences.dart';
 
+import '../api/cache_store.dart';
 import '../api/marianumcloud/talk/share_files_to_chat.dart';
 import '../background/widget_background_task.dart';
 import '../notification/notification_service.dart';
@@ -26,7 +27,6 @@ import '../state/app/modules/timetable/bloc/timetable_bloc.dart';
 import '../utils/app_paths.dart';
 import '../utils/downloads/download_manager.dart';
 import '../utils/file_clipboard.dart';
-import '../widget/debug/cache_view.dart';
 import '../widget_data/widget_sync.dart';
 
 /// Removes everything the signed-out account left on the device. Every step
@@ -98,7 +98,7 @@ abstract final class SessionWipe {
       await (await SharedPreferences.getInstance()).clear();
     });
     await _stepAsync('hydrated storage', HydratedBloc.storage.clear);
-    await _stepAsync('request cache', const CacheView().clear);
+    await _stepAsync('request cache', CacheStore.instance.clear);
     await _stepAsync('chat background', () async {
       final image = File(AppPaths.chatBackgroundImage);
       if (image.existsSync()) await image.delete();