diff --git a/packages/app/integration_test/screenshot_test.dart b/packages/app/integration_test/screenshot_test.dart
index def82780..5b9c4647 100644
--- a/packages/app/integration_test/screenshot_test.dart
+++ b/packages/app/integration_test/screenshot_test.dart
@@ -14,7 +14,7 @@ import 'package:neon/settings.dart';
 import 'package:neon_files/widgets/actions.dart';
 import 'package:shared_preferences/shared_preferences.dart';
 
-Future runTestApp(
+Future<void> runTestApp(
   final WidgetTester tester,
   final IntegrationTestWidgetsFlutterBinding binding, {
   final Account? account,
@@ -30,18 +30,18 @@ Future runTestApp(
   await tester.pumpAndSettle();
 }
 
-Future openDrawer(final WidgetTester tester) async {
+Future<void> openDrawer(final WidgetTester tester) async {
   await tester.tap(find.byTooltip('Open navigation menu'));
   await tester.pumpAndSettle();
 }
 
-Future switchPage(final WidgetTester tester, final String name) async {
+Future<void> switchPage(final WidgetTester tester, final String name) async {
   await openDrawer(tester);
   await tester.tap(find.text(name).last);
   await tester.pumpAndSettle();
 }
 
-Future prepareScreenshot(final WidgetTester tester, final IntegrationTestWidgetsFlutterBinding binding) async {
+Future<void> prepareScreenshot(final WidgetTester tester, final IntegrationTestWidgetsFlutterBinding binding) async {
   await binding.convertFlutterSurfaceToImage();
   await tester.pumpAndSettle();
 }
@@ -63,7 +63,7 @@ Future<Account> getAccount(final String username) async {
   );
 }
 
-Future main() async {
+Future<void> main() async {
   // The screenshots are pretty annoying on Android. See https://github.com/flutter/flutter/issues/92381
 
   assert(Platform.isAndroid, 'Screenshots need to be taken on Android');
diff --git a/packages/app/lib/main.dart b/packages/app/lib/main.dart
index 62c13ad3..c732b8ba 100644
--- a/packages/app/lib/main.dart
+++ b/packages/app/lib/main.dart
@@ -2,7 +2,7 @@ import 'package:app/apps.dart';
 import 'package:app/branding.dart';
 import 'package:neon/neon.dart';
 
-Future main() async {
+Future<void> main() async {
   await runNeon(
     appImplementations: appImplementations,
     theme: neonTheme,
diff --git a/packages/dynamite/dynamite/lib/src/builder/client.dart b/packages/dynamite/dynamite/lib/src/builder/client.dart
index 636fc18e..e941634b 100644
--- a/packages/dynamite/dynamite/lib/src/builder/client.dart
+++ b/packages/dynamite/dynamite/lib/src/builder/client.dart
@@ -604,7 +604,7 @@ final _response = await ${isRootClient ? 'this' : '_rootClient'}.doRequest(
               b.returns = refer('Future<$dataType>');
               code.write('return $dataValue;');
             } else {
-              b.returns = refer('Future');
+              b.returns = refer('Future<void>');
               code.write('return;');
             }
 
diff --git a/packages/neon/neon/lib/blocs.dart b/packages/neon/neon/lib/blocs.dart
index e160c0d7..c7c95a68 100644
--- a/packages/neon/neon/lib/blocs.dart
+++ b/packages/neon/neon/lib/blocs.dart
@@ -1,5 +1,6 @@
 export 'package:neon/src/bloc/bloc.dart';
 export 'package:neon/src/bloc/result.dart';
 export 'package:neon/src/bloc/result_builder.dart';
-export 'package:neon/src/blocs/accounts.dart'; // TODO: Remove access to the AccountsBloc. Apps should not need to access this
-export 'package:neon/src/blocs/timer.dart';
+// TODO: Remove access to the AccountsBloc. Apps should not need to access this
+export 'package:neon/src/blocs/accounts.dart' show AccountsBloc;
+export 'package:neon/src/blocs/timer.dart' hide TimerBlocEvents, TimerBlocStates;
diff --git a/packages/neon/neon/lib/neon.dart b/packages/neon/neon/lib/neon.dart
index 2df80d53..ba72a974 100644
--- a/packages/neon/neon/lib/neon.dart
+++ b/packages/neon/neon/lib/neon.dart
@@ -18,7 +18,7 @@ import 'package:neon/src/utils/user_agent.dart';
 import 'package:package_info_plus/package_info_plus.dart';
 import 'package:provider/provider.dart';
 
-Future runNeon({
+Future<void> runNeon({
   required final Iterable<AppImplementation> appImplementations,
   required final NeonTheme theme,
   @visibleForTesting final WidgetsBinding? bindingOverride,
diff --git a/packages/neon/neon/lib/src/app.dart b/packages/neon/neon/lib/src/app.dart
index 29e8a5f7..8129bcec 100644
--- a/packages/neon/neon/lib/src/app.dart
+++ b/packages/neon/neon/lib/src/app.dart
@@ -5,6 +5,7 @@ import 'dart:io';
 import 'package:collection/collection.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_native_splash/flutter_native_splash.dart';
+import 'package:meta/meta.dart';
 import 'package:neon/l10n/localizations.dart';
 import 'package:neon/src/bloc/result_builder.dart';
 import 'package:neon/src/blocs/accounts.dart';
@@ -27,6 +28,7 @@ import 'package:quick_actions/quick_actions.dart';
 import 'package:tray_manager/tray_manager.dart' as tray;
 import 'package:window_manager/window_manager.dart';
 
+@internal
 class NeonApp extends StatefulWidget {
   const NeonApp({
     required this.neonTheme,
@@ -196,7 +198,7 @@ class _NeonAppState extends State<NeonApp> with WidgetsBindingObserver, tray.Tra
   }
 
   @override
-  Future onWindowClose() async {
+  Future<void> onWindowClose() async {
     if (_globalOptions.startupMinimizeInsteadOfExit.value) {
       await _saveAndMinimizeWindow();
     } else {
@@ -205,11 +207,11 @@ class _NeonAppState extends State<NeonApp> with WidgetsBindingObserver, tray.Tra
   }
 
   @override
-  Future onWindowMinimize() async {
+  Future<void> onWindowMinimize() async {
     await _saveAndMinimizeWindow();
   }
 
-  Future _handleShortcut(final String shortcutType) async {
+  Future<void> _handleShortcut(final String shortcutType) async {
     if (shortcutType == 'show_hide') {
       if (NeonPlatform.instance.canUseWindowManager) {
         if (await windowManager.isVisible()) {
@@ -231,13 +233,13 @@ class _NeonAppState extends State<NeonApp> with WidgetsBindingObserver, tray.Tra
     }
   }
 
-  Future _openAppFromExternal(final Account account, final String id) async {
+  Future<void> _openAppFromExternal(final Account account, final String id) async {
     await _accountsBloc.getAppsBlocFor(account).setActiveApp(id);
     _navigatorKey.currentState!.popUntil((final route) => route.settings.name == 'home');
     await _showAndRestoreWindow();
   }
 
-  Future _saveAndMinimizeWindow() async {
+  Future<void> _saveAndMinimizeWindow() async {
     _lastBounds = await windowManager.getBounds();
     if (_globalOptions.systemTrayEnabled.value && _globalOptions.systemTrayHideToTrayWhenMinimized.value) {
       await windowManager.hide();
@@ -246,7 +248,7 @@ class _NeonAppState extends State<NeonApp> with WidgetsBindingObserver, tray.Tra
     }
   }
 
-  Future _showAndRestoreWindow() async {
+  Future<void> _showAndRestoreWindow() async {
     if (!NeonPlatform.instance.canUseWindowManager) {
       return;
     }
diff --git a/packages/neon/neon/lib/src/bloc/bloc.dart b/packages/neon/neon/lib/src/bloc/bloc.dart
index 96263e4c..72629c47 100644
--- a/packages/neon/neon/lib/src/bloc/bloc.dart
+++ b/packages/neon/neon/lib/src/bloc/bloc.dart
@@ -17,7 +17,7 @@ abstract class InteractiveBloc extends Bloc {
   final _errorsStreamController = StreamController<Object>();
   late Stream<Object> errors = _errorsStreamController.stream.asBroadcastStream();
 
-  Future refresh();
+  Future<void> refresh();
 
   void addError(final Object error) {
     _errorsStreamController.add(error);
@@ -25,9 +25,9 @@ abstract class InteractiveBloc extends Bloc {
 
   // ignore: avoid_void_async
   void wrapAction(
-    final Future Function() call, {
+    final AsyncCallback call, {
     final bool disableTimeout = false,
-    final Future Function()? refresh,
+    final AsyncCallback? refresh,
   }) async {
     try {
       if (disableTimeout) {
diff --git a/packages/neon/neon/lib/src/blocs/accounts.dart b/packages/neon/neon/lib/src/blocs/accounts.dart
index 2bbf0331..c4ca84a8 100644
--- a/packages/neon/neon/lib/src/blocs/accounts.dart
+++ b/packages/neon/neon/lib/src/blocs/accounts.dart
@@ -2,6 +2,7 @@ import 'dart:async';
 import 'dart:convert';
 
 import 'package:flutter/foundation.dart';
+import 'package:meta/meta.dart';
 import 'package:neon/src/bloc/bloc.dart';
 import 'package:neon/src/blocs/apps.dart';
 import 'package:neon/src/blocs/capabilities.dart';
@@ -17,6 +18,7 @@ import 'package:rxdart/rxdart.dart';
 
 const _keyAccounts = 'accounts';
 
+@internal
 abstract interface class AccountsBlocEvents {
   /// Logs in the given [account].
   ///
@@ -40,6 +42,7 @@ abstract interface class AccountsBlocEvents {
   void setActiveAccount(final Account account);
 }
 
+@internal
 abstract interface class AccountsBlocStates {
   /// All registered accounts.
   ///
diff --git a/packages/neon/neon/lib/src/blocs/apps.dart b/packages/neon/neon/lib/src/blocs/apps.dart
index bf7cd847..1492f9f7 100644
--- a/packages/neon/neon/lib/src/blocs/apps.dart
+++ b/packages/neon/neon/lib/src/blocs/apps.dart
@@ -16,7 +16,8 @@ import 'package:nextcloud/nextcloud.dart';
 import 'package:provider/provider.dart';
 import 'package:rxdart/rxdart.dart';
 
-abstract class AppsBlocEvents {
+@internal
+abstract interface class AppsBlocEvents {
   /// Sets the active app using the [appID].
   ///
   /// If the app is already the active app nothing will happen.
@@ -24,7 +25,8 @@ abstract class AppsBlocEvents {
   void setActiveApp(final String appID, {final bool skipAlreadySet = false});
 }
 
-abstract class AppsBlocStates {
+@internal
+abstract interface class AppsBlocStates {
   BehaviorSubject<Result<List<CoreNavigationEntry>>> get apps;
 
   BehaviorSubject<Result<Iterable<AppImplementation>>> get appImplementations;
@@ -33,7 +35,7 @@ abstract class AppsBlocStates {
 
   BehaviorSubject<AppImplementation> get activeApp;
 
-  BehaviorSubject get openNotifications;
+  BehaviorSubject<void> get openNotifications;
 
   BehaviorSubject<Iterable<(String, Object?)>?> get appVersions;
 }
@@ -182,13 +184,13 @@ class AppsBloc extends InteractiveBloc implements AppsBlocEvents, AppsBlocStates
       BehaviorSubject<Result<NotificationsAppInterface?>>();
 
   @override
-  BehaviorSubject openNotifications = BehaviorSubject();
+  BehaviorSubject<void> openNotifications = BehaviorSubject();
 
   @override
   BehaviorSubject<List<(String, Object?)>?> appVersions = BehaviorSubject();
 
   @override
-  Future refresh() async {
+  Future<void> refresh() async {
     await RequestManager.instance
         .wrapNextcloud<List<CoreNavigationEntry>, CoreNavigationGetAppsNavigationResponseApplicationJson>(
       _account.id,
@@ -200,7 +202,7 @@ class AppsBloc extends InteractiveBloc implements AppsBlocEvents, AppsBlocStates
   }
 
   @override
-  Future setActiveApp(final String appID, {final bool skipAlreadySet = false}) async {
+  Future<void> setActiveApp(final String appID, {final bool skipAlreadySet = false}) async {
     if (appID == AppIDs.notifications) {
       openNotifications.add(null);
       return;
@@ -220,6 +222,6 @@ class AppsBloc extends InteractiveBloc implements AppsBlocEvents, AppsBlocStates
   T getAppBloc<T extends Bloc>(final AppImplementation<T, dynamic> appImplementation) =>
       appImplementation.getBloc(_account);
 
-  List<Provider> get appBlocProviders =>
+  List<Provider<Bloc>> get appBlocProviders =>
       _allAppImplementations.map((final appImplementation) => appImplementation.blocProvider).toList();
 }
diff --git a/packages/neon/neon/lib/src/blocs/capabilities.dart b/packages/neon/neon/lib/src/blocs/capabilities.dart
index e77eeeb0..a2f91e95 100644
--- a/packages/neon/neon/lib/src/blocs/capabilities.dart
+++ b/packages/neon/neon/lib/src/blocs/capabilities.dart
@@ -8,9 +8,11 @@ import 'package:neon/src/utils/request_manager.dart';
 import 'package:nextcloud/nextcloud.dart';
 import 'package:rxdart/rxdart.dart';
 
-abstract class CapabilitiesBlocEvents {}
+@internal
+abstract interface class CapabilitiesBlocEvents {}
 
-abstract class CapabilitiesBlocStates {
+@internal
+abstract interface class CapabilitiesBlocStates {
   BehaviorSubject<Result<CoreOcsGetCapabilitiesResponseApplicationJson_Ocs_Data>> get capabilities;
 }
 
@@ -35,7 +37,7 @@ class CapabilitiesBloc extends InteractiveBloc implements CapabilitiesBlocEvents
       BehaviorSubject<Result<CoreOcsGetCapabilitiesResponseApplicationJson_Ocs_Data>>();
 
   @override
-  Future refresh() async {
+  Future<void> refresh() async {
     await RequestManager.instance.wrapNextcloud<CoreOcsGetCapabilitiesResponseApplicationJson_Ocs_Data,
         CoreOcsGetCapabilitiesResponseApplicationJson>(
       _account.id,
diff --git a/packages/neon/neon/lib/src/blocs/first_launch.dart b/packages/neon/neon/lib/src/blocs/first_launch.dart
index 056e9378..366b17f5 100644
--- a/packages/neon/neon/lib/src/blocs/first_launch.dart
+++ b/packages/neon/neon/lib/src/blocs/first_launch.dart
@@ -5,10 +5,12 @@ import 'package:neon/src/bloc/bloc.dart';
 import 'package:neon/src/settings/models/storage.dart';
 import 'package:rxdart/rxdart.dart';
 
-abstract class FirstLaunchBlocEvents {}
+@internal
+abstract interface class FirstLaunchBlocEvents {}
 
-abstract class FirstLaunchBlocStates {
-  BehaviorSubject get onFirstLaunch;
+@internal
+abstract interface class FirstLaunchBlocStates {
+  BehaviorSubject<void> get onFirstLaunch;
 }
 
 @immutable
@@ -31,5 +33,5 @@ class FirstLaunchBloc extends Bloc implements FirstLaunchBlocEvents, FirstLaunch
   }
 
   @override
-  final BehaviorSubject onFirstLaunch = BehaviorSubject();
+  final BehaviorSubject<void> onFirstLaunch = BehaviorSubject();
 }
diff --git a/packages/neon/neon/lib/src/blocs/login_check_account.dart b/packages/neon/neon/lib/src/blocs/login_check_account.dart
index f7b97561..337b3e56 100644
--- a/packages/neon/neon/lib/src/blocs/login_check_account.dart
+++ b/packages/neon/neon/lib/src/blocs/login_check_account.dart
@@ -1,6 +1,7 @@
 import 'dart:async';
 
 import 'package:flutter/foundation.dart';
+import 'package:meta/meta.dart';
 import 'package:neon/src/bloc/bloc.dart';
 import 'package:neon/src/bloc/result.dart';
 import 'package:neon/src/models/account.dart';
@@ -8,13 +9,16 @@ import 'package:neon/src/utils/user_agent.dart';
 import 'package:nextcloud/nextcloud.dart';
 import 'package:rxdart/rxdart.dart';
 
+@internal
 abstract interface class LoginCheckAccountBlocEvents {}
 
+@internal
 abstract interface class LoginCheckAccountBlocStates {
   /// Contains the account for the user
   BehaviorSubject<Result<Account>> get state;
 }
 
+@internal
 class LoginCheckAccountBloc extends InteractiveBloc
     implements LoginCheckAccountBlocEvents, LoginCheckAccountBlocStates {
   LoginCheckAccountBloc(
@@ -40,7 +44,7 @@ class LoginCheckAccountBloc extends InteractiveBloc
   BehaviorSubject<Result<Account>> state = BehaviorSubject();
 
   @override
-  Future refresh() async {
+  Future<void> refresh() async {
     state.add(Result.loading());
 
     try {
diff --git a/packages/neon/neon/lib/src/blocs/login_check_server_status.dart b/packages/neon/neon/lib/src/blocs/login_check_server_status.dart
index a92529f1..1f7eeb4d 100644
--- a/packages/neon/neon/lib/src/blocs/login_check_server_status.dart
+++ b/packages/neon/neon/lib/src/blocs/login_check_server_status.dart
@@ -1,19 +1,23 @@
 import 'dart:async';
 
 import 'package:flutter/foundation.dart';
+import 'package:meta/meta.dart';
 import 'package:neon/src/bloc/bloc.dart';
 import 'package:neon/src/bloc/result.dart';
 import 'package:neon/src/utils/user_agent.dart';
 import 'package:nextcloud/nextcloud.dart';
 import 'package:rxdart/rxdart.dart';
 
+@internal
 abstract interface class LoginCheckServerStatusBlocEvents {}
 
+@internal
 abstract interface class LoginCheckServerStatusBlocStates {
   /// Contains the current server connection state
   BehaviorSubject<Result<CoreStatus>> get state;
 }
 
+@internal
 class LoginCheckServerStatusBloc extends InteractiveBloc
     implements LoginCheckServerStatusBlocEvents, LoginCheckServerStatusBlocStates {
   LoginCheckServerStatusBloc(this.serverURL) {
@@ -33,7 +37,7 @@ class LoginCheckServerStatusBloc extends InteractiveBloc
   BehaviorSubject<Result<CoreStatus>> state = BehaviorSubject();
 
   @override
-  Future refresh() async {
+  Future<void> refresh() async {
     state.add(Result.loading());
 
     try {
diff --git a/packages/neon/neon/lib/src/blocs/login_flow.dart b/packages/neon/neon/lib/src/blocs/login_flow.dart
index ee6cfc10..a0d3e892 100644
--- a/packages/neon/neon/lib/src/blocs/login_flow.dart
+++ b/packages/neon/neon/lib/src/blocs/login_flow.dart
@@ -1,20 +1,24 @@
 import 'dart:async';
 
 import 'package:flutter/foundation.dart';
+import 'package:meta/meta.dart';
 import 'package:neon/src/bloc/bloc.dart';
 import 'package:neon/src/bloc/result.dart';
 import 'package:neon/src/utils/user_agent.dart';
 import 'package:nextcloud/nextcloud.dart';
 import 'package:rxdart/rxdart.dart';
 
-abstract class LoginFlowBlocEvents {}
+@internal
+abstract interface class LoginFlowBlocEvents {}
 
-abstract class LoginFlowBlocStates {
+@internal
+abstract interface class LoginFlowBlocStates {
   BehaviorSubject<Result<CoreLoginFlowV2>> get init;
 
   Stream<CoreLoginFlowV2Credentials> get result;
 }
 
+@internal
 class LoginFlowBloc extends InteractiveBloc implements LoginFlowBlocEvents, LoginFlowBlocStates {
   LoginFlowBloc(this.serverURL) {
     unawaited(refresh());
@@ -45,7 +49,7 @@ class LoginFlowBloc extends InteractiveBloc implements LoginFlowBlocEvents, Logi
   late Stream<CoreLoginFlowV2Credentials> result = _resultController.stream.asBroadcastStream();
 
   @override
-  Future refresh() async {
+  Future<void> refresh() async {
     try {
       init.add(Result.loading());
 
diff --git a/packages/neon/neon/lib/src/blocs/next_push.dart b/packages/neon/neon/lib/src/blocs/next_push.dart
index c1ba9bc3..0e9184f1 100644
--- a/packages/neon/neon/lib/src/blocs/next_push.dart
+++ b/packages/neon/neon/lib/src/blocs/next_push.dart
@@ -8,10 +8,12 @@ import 'package:neon/src/models/account.dart';
 import 'package:neon/src/utils/global_options.dart';
 import 'package:rxdart/rxdart.dart';
 
-abstract class NextPushBlocEvents {}
+@internal
+abstract interface class NextPushBlocEvents {}
 
-abstract class NextPushBlocStates {
-  BehaviorSubject get onNextPushSupported;
+@internal
+abstract interface class NextPushBlocStates {
+  BehaviorSubject<void> get onNextPushSupported;
 }
 
 @internal
@@ -78,5 +80,5 @@ class NextPushBloc extends Bloc implements NextPushBlocEvents, NextPushBlocState
   }
 
   @override
-  BehaviorSubject onNextPushSupported = BehaviorSubject();
+  BehaviorSubject<void> onNextPushSupported = BehaviorSubject();
 }
diff --git a/packages/neon/neon/lib/src/blocs/push_notifications.dart b/packages/neon/neon/lib/src/blocs/push_notifications.dart
index a701ade7..bc5c7051 100644
--- a/packages/neon/neon/lib/src/blocs/push_notifications.dart
+++ b/packages/neon/neon/lib/src/blocs/push_notifications.dart
@@ -14,9 +14,11 @@ import 'package:neon/src/utils/push_utils.dart';
 import 'package:nextcloud/nextcloud.dart';
 import 'package:unifiedpush/unifiedpush.dart';
 
-abstract class PushNotificationsBlocEvents {}
+@internal
+abstract interface class PushNotificationsBlocEvents {}
 
-abstract class PushNotificationsBlocStates {
+@internal
+abstract interface class PushNotificationsBlocStates {
   Stream<PushNotification> get notifications;
 }
 
@@ -40,7 +42,7 @@ class PushNotificationsBloc extends Bloc implements PushNotificationsBlocEvents,
   final GlobalOptions _globalOptions;
 
   final _notificationsController = StreamController<PushNotification>();
-  StreamSubscription? _accountsListener;
+  StreamSubscription<List<Account>>? _accountsListener;
 
   @override
   void dispose() {
@@ -66,7 +68,7 @@ class PushNotificationsBloc extends Bloc implements PushNotificationsBlocEvents,
     }
   }
 
-  Future _setupUnifiedPush() async {
+  Future<void> _setupUnifiedPush() async {
     // We just use a single RSA keypair for all accounts
     final keypair = await PushUtils.loadRSAKeypair();
 
@@ -118,7 +120,7 @@ class PushNotificationsBloc extends Bloc implements PushNotificationsBlocEvents,
     }
   }
 
-  Future _unregisterUnifiedPushInstances(final List<Account> accounts) async {
+  Future<void> _unregisterUnifiedPushInstances(final List<Account> accounts) async {
     for (final account in accounts) {
       try {
         await account.client.notifications.push.removeDevice();
@@ -130,7 +132,7 @@ class PushNotificationsBloc extends Bloc implements PushNotificationsBlocEvents,
     }
   }
 
-  Future _registerUnifiedPushInstances(final List<Account> accounts) async {
+  Future<void> _registerUnifiedPushInstances(final List<Account> accounts) async {
     // Notifications will only work on accounts with app password
     for (final account in accounts.where((final a) => a.password != null)) {
       await UnifiedPush.registerApp(account.id);
diff --git a/packages/neon/neon/lib/src/blocs/timer.dart b/packages/neon/neon/lib/src/blocs/timer.dart
index b839b414..31a7269a 100644
--- a/packages/neon/neon/lib/src/blocs/timer.dart
+++ b/packages/neon/neon/lib/src/blocs/timer.dart
@@ -4,7 +4,8 @@ import 'dart:ui';
 import 'package:meta/meta.dart';
 import 'package:neon/src/bloc/bloc.dart';
 
-abstract class TimerBlocEvents {
+@internal
+abstract interface class TimerBlocEvents {
   /// Register a [callback] that will be called periodically.
   /// The time between the executions is defined by the [duration].
   NeonTimer registerTimer(final Duration duration, final VoidCallback callback);
@@ -14,7 +15,8 @@ abstract class TimerBlocEvents {
   void unregisterTimer(final NeonTimer timer);
 }
 
-abstract class TimerBlocStates {}
+@internal
+abstract interface class TimerBlocStates {}
 
 /// Execute callbacks at defined periodic intervals.
 /// Components can register their callbacks and everything with the same periodicity will be executed at the same time.
diff --git a/packages/neon/neon/lib/src/blocs/unified_search.dart b/packages/neon/neon/lib/src/blocs/unified_search.dart
index 2a998601..a20e59ad 100644
--- a/packages/neon/neon/lib/src/blocs/unified_search.dart
+++ b/packages/neon/neon/lib/src/blocs/unified_search.dart
@@ -10,6 +10,7 @@ import 'package:neon/src/blocs/apps.dart';
 import 'package:nextcloud/nextcloud.dart';
 import 'package:rxdart/rxdart.dart';
 
+@internal
 abstract interface class UnifiedSearchBlocEvents {
   void search(final String term);
 
@@ -18,6 +19,7 @@ abstract interface class UnifiedSearchBlocEvents {
   void disable();
 }
 
+@internal
 abstract interface class UnifiedSearchBlocStates {
   BehaviorSubject<bool> get enabled;
 
@@ -56,12 +58,12 @@ class UnifiedSearchBloc extends InteractiveBloc implements UnifiedSearchBlocEven
   }
 
   @override
-  Future refresh() async {
+  Future<void> refresh() async {
     await _search();
   }
 
   @override
-  Future search(final String term) async {
+  Future<void> search(final String term) async {
     _term = term.trim();
     await _search();
   }
@@ -78,7 +80,7 @@ class UnifiedSearchBloc extends InteractiveBloc implements UnifiedSearchBlocEven
     _term = '';
   }
 
-  Future _search() async {
+  Future<void> _search() async {
     if (_term.isEmpty) {
       results.add(Result.success(null));
       return;
@@ -108,7 +110,7 @@ class UnifiedSearchBloc extends InteractiveBloc implements UnifiedSearchBlocEven
     }
   }
 
-  Future _searchProvider(final CoreUnifiedSearchProvider provider) async {
+  Future<void> _searchProvider(final CoreUnifiedSearchProvider provider) async {
     _updateResults(provider, Result.loading());
     try {
       final response = await _account.client.core.unifiedSearch.search(
diff --git a/packages/neon/neon/lib/src/blocs/user_details.dart b/packages/neon/neon/lib/src/blocs/user_details.dart
index 6df57f3c..d109406b 100644
--- a/packages/neon/neon/lib/src/blocs/user_details.dart
+++ b/packages/neon/neon/lib/src/blocs/user_details.dart
@@ -8,9 +8,11 @@ import 'package:neon/src/utils/request_manager.dart';
 import 'package:nextcloud/nextcloud.dart';
 import 'package:rxdart/rxdart.dart';
 
-abstract class UserDetailsBlocEvents {}
+@internal
+abstract interface class UserDetailsBlocEvents {}
 
-abstract class UserDetailsBlocStates {
+@internal
+abstract interface class UserDetailsBlocStates {
   BehaviorSubject<Result<ProvisioningApiUserDetails>> get userDetails;
 }
 
@@ -35,7 +37,7 @@ class UserDetailsBloc extends InteractiveBloc implements UserDetailsBlocEvents,
       BehaviorSubject<Result<ProvisioningApiUserDetails>>();
 
   @override
-  Future refresh() async {
+  Future<void> refresh() async {
     await RequestManager.instance
         .wrapNextcloud<ProvisioningApiUserDetails, ProvisioningApiUsersGetCurrentUserResponseApplicationJson>(
       _account.id,
diff --git a/packages/neon/neon/lib/src/blocs/user_statuses.dart b/packages/neon/neon/lib/src/blocs/user_statuses.dart
index 03f5e0b7..5cf0dd3b 100644
--- a/packages/neon/neon/lib/src/blocs/user_statuses.dart
+++ b/packages/neon/neon/lib/src/blocs/user_statuses.dart
@@ -11,11 +11,13 @@ import 'package:nextcloud/nextcloud.dart';
 import 'package:rxdart/rxdart.dart';
 import 'package:window_manager/window_manager.dart';
 
-abstract class UserStatusesBlocEvents {
+@internal
+abstract interface class UserStatusesBlocEvents {
   void load(final String username, {final bool force = false});
 }
 
-abstract class UserStatusesBlocStates {
+@internal
+abstract interface class UserStatusesBlocStates {
   BehaviorSubject<Map<String, Result<UserStatusPublicInterface?>>> get statuses;
 }
 
@@ -43,14 +45,14 @@ class UserStatusesBloc extends InteractiveBloc implements UserStatusesBlocEvents
       BehaviorSubject<Map<String, Result<UserStatusPublicInterface?>>>();
 
   @override
-  Future refresh() async {
+  Future<void> refresh() async {
     for (final username in _statuses.keys) {
       await load(username, force: true);
     }
   }
 
   @override
-  Future load(final String username, {final bool force = false}) async {
+  Future<void> load(final String username, {final bool force = false}) async {
     if (!force && _statuses.containsKey(username)) {
       return;
     }
diff --git a/packages/neon/neon/lib/src/models/app_implementation.dart b/packages/neon/neon/lib/src/models/app_implementation.dart
index 4ea33c1a..a36936cd 100644
--- a/packages/neon/neon/lib/src/models/app_implementation.dart
+++ b/packages/neon/neon/lib/src/models/app_implementation.dart
@@ -18,7 +18,7 @@ abstract class AppImplementation<T extends Bloc, R extends NextcloudAppOptions>
   AppImplementation();
 
   String get id;
-  LocalizationsDelegate get localizationsDelegate;
+  LocalizationsDelegate<Object> get localizationsDelegate;
   List<Locale> get supportedLocales;
 
   String nameFromLocalization(final AppLocalizations localizations) => localizations.appImplementationName(id);
diff --git a/packages/neon/neon/lib/src/pages/account_settings.dart b/packages/neon/neon/lib/src/pages/account_settings.dart
index ef1d2c2f..15771698 100644
--- a/packages/neon/neon/lib/src/pages/account_settings.dart
+++ b/packages/neon/neon/lib/src/pages/account_settings.dart
@@ -1,6 +1,7 @@
 import 'package:filesize/filesize.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_material_design_icons/flutter_material_design_icons.dart';
+import 'package:meta/meta.dart';
 import 'package:neon/l10n/localizations.dart';
 import 'package:neon/src/bloc/result_builder.dart';
 import 'package:neon/src/blocs/accounts.dart';
@@ -16,6 +17,7 @@ import 'package:neon/src/widgets/exception.dart';
 import 'package:neon/src/widgets/linear_progress_indicator.dart';
 import 'package:nextcloud/nextcloud.dart';
 
+@internal
 class AccountSettingsPage extends StatelessWidget {
   const AccountSettingsPage({
     required this.bloc,
diff --git a/packages/neon/neon/lib/src/pages/home.dart b/packages/neon/neon/lib/src/pages/home.dart
index a76f932a..29701d56 100644
--- a/packages/neon/neon/lib/src/pages/home.dart
+++ b/packages/neon/neon/lib/src/pages/home.dart
@@ -1,6 +1,7 @@
 import 'dart:async';
 
 import 'package:flutter/material.dart';
+import 'package:meta/meta.dart';
 import 'package:neon/l10n/localizations.dart';
 import 'package:neon/src/bloc/result_builder.dart';
 import 'package:neon/src/blocs/accounts.dart';
@@ -16,6 +17,7 @@ import 'package:neon/src/widgets/exception.dart';
 import 'package:neon/src/widgets/unified_search_results.dart';
 import 'package:provider/provider.dart';
 
+@internal
 class HomePage extends StatefulWidget {
   const HomePage({
     super.key,
@@ -32,7 +34,7 @@ class _HomePageState extends State<HomePage> {
   late GlobalOptions _globalOptions;
   late AccountsBloc _accountsBloc;
   late AppsBloc _appsBloc;
-  late StreamSubscription _versionCheckSubscription;
+  late StreamSubscription<List<(String, Object?)>?> _versionCheckSubscription;
 
   @override
   void initState() {
@@ -76,7 +78,7 @@ class _HomePageState extends State<HomePage> {
     super.dispose();
   }
 
-  Future _checkMaintenanceMode() async {
+  Future<void> _checkMaintenanceMode() async {
     try {
       final status = await _account.client.core.getStatus();
       if (status.maintenance && mounted) {
@@ -93,7 +95,7 @@ class _HomePageState extends State<HomePage> {
     }
   }
 
-  Future _showProblem(final String title) async {
+  Future<void> _showProblem(final String title) async {
     final colorScheme = Theme.of(context).colorScheme;
 
     await showDialog(
diff --git a/packages/neon/neon/lib/src/pages/login.dart b/packages/neon/neon/lib/src/pages/login.dart
index ddcfd9e9..f6ea1caa 100644
--- a/packages/neon/neon/lib/src/pages/login.dart
+++ b/packages/neon/neon/lib/src/pages/login.dart
@@ -1,4 +1,5 @@
 import 'package:flutter/material.dart';
+import 'package:meta/meta.dart';
 import 'package:neon/l10n/localizations.dart';
 import 'package:neon/src/platform/platform.dart';
 import 'package:neon/src/router.dart';
@@ -7,6 +8,7 @@ import 'package:neon/src/theme/dialog.dart';
 import 'package:neon/src/utils/validators.dart';
 import 'package:neon/src/widgets/nextcloud_logo.dart';
 
+@internal
 class LoginPage extends StatefulWidget {
   const LoginPage({
     super.key,
diff --git a/packages/neon/neon/lib/src/pages/login_check_account.dart b/packages/neon/neon/lib/src/pages/login_check_account.dart
index b117aa6e..50399e0e 100644
--- a/packages/neon/neon/lib/src/pages/login_check_account.dart
+++ b/packages/neon/neon/lib/src/pages/login_check_account.dart
@@ -1,6 +1,7 @@
 import 'dart:async';
 
 import 'package:flutter/material.dart';
+import 'package:meta/meta.dart';
 import 'package:neon/l10n/localizations.dart';
 import 'package:neon/src/bloc/result.dart';
 import 'package:neon/src/bloc/result_builder.dart';
@@ -14,6 +15,7 @@ import 'package:neon/src/widgets/exception.dart';
 import 'package:neon/src/widgets/validation_tile.dart';
 import 'package:provider/provider.dart';
 
+@internal
 class LoginCheckAccountPage extends StatefulWidget {
   const LoginCheckAccountPage({
     required this.serverURL,
diff --git a/packages/neon/neon/lib/src/pages/login_check_server_status.dart b/packages/neon/neon/lib/src/pages/login_check_server_status.dart
index 7c777669..aee497a2 100644
--- a/packages/neon/neon/lib/src/pages/login_check_server_status.dart
+++ b/packages/neon/neon/lib/src/pages/login_check_server_status.dart
@@ -1,4 +1,5 @@
 import 'package:flutter/material.dart';
+import 'package:meta/meta.dart';
 import 'package:neon/l10n/localizations.dart';
 import 'package:neon/src/bloc/result.dart';
 import 'package:neon/src/bloc/result_builder.dart';
@@ -9,6 +10,7 @@ import 'package:neon/src/widgets/exception.dart';
 import 'package:neon/src/widgets/validation_tile.dart';
 import 'package:nextcloud/nextcloud.dart';
 
+@internal
 class LoginCheckServerStatusPage extends StatefulWidget {
   const LoginCheckServerStatusPage({
     required this.serverURL,
diff --git a/packages/neon/neon/lib/src/pages/login_flow.dart b/packages/neon/neon/lib/src/pages/login_flow.dart
index ba631c48..99fef108 100644
--- a/packages/neon/neon/lib/src/pages/login_flow.dart
+++ b/packages/neon/neon/lib/src/pages/login_flow.dart
@@ -1,4 +1,5 @@
 import 'package:flutter/material.dart';
+import 'package:meta/meta.dart';
 import 'package:neon/l10n/localizations.dart';
 import 'package:neon/src/bloc/result_builder.dart';
 import 'package:neon/src/blocs/login_flow.dart';
@@ -7,6 +8,7 @@ import 'package:neon/src/widgets/exception.dart';
 import 'package:neon/src/widgets/linear_progress_indicator.dart';
 import 'package:url_launcher/url_launcher_string.dart';
 
+@internal
 class LoginFlowPage extends StatefulWidget {
   const LoginFlowPage({
     required this.serverURL,
diff --git a/packages/neon/neon/lib/src/pages/login_qrcode.dart b/packages/neon/neon/lib/src/pages/login_qrcode.dart
index c92edb0b..8a581e0d 100644
--- a/packages/neon/neon/lib/src/pages/login_qrcode.dart
+++ b/packages/neon/neon/lib/src/pages/login_qrcode.dart
@@ -1,10 +1,12 @@
 import 'package:flutter/material.dart';
 import 'package:flutter_zxing/flutter_zxing.dart';
+import 'package:meta/meta.dart';
 import 'package:neon/src/models/account.dart';
 import 'package:neon/src/router.dart';
 import 'package:neon/src/utils/exceptions.dart';
 import 'package:neon/src/widgets/exception.dart';
 
+@internal
 class LoginQrcodePage extends StatefulWidget {
   const LoginQrcodePage({
     super.key,
diff --git a/packages/neon/neon/lib/src/pages/nextcloud_app_settings.dart b/packages/neon/neon/lib/src/pages/nextcloud_app_settings.dart
index 391b5a94..f3a2d4cf 100644
--- a/packages/neon/neon/lib/src/pages/nextcloud_app_settings.dart
+++ b/packages/neon/neon/lib/src/pages/nextcloud_app_settings.dart
@@ -1,5 +1,6 @@
 import 'package:flutter/material.dart';
 import 'package:flutter_material_design_icons/flutter_material_design_icons.dart';
+import 'package:meta/meta.dart';
 import 'package:neon/l10n/localizations.dart';
 import 'package:neon/src/models/app_implementation.dart';
 import 'package:neon/src/settings/models/select_option.dart';
@@ -11,6 +12,7 @@ import 'package:neon/src/settings/widgets/settings_list.dart';
 import 'package:neon/src/theme/dialog.dart';
 import 'package:neon/src/utils/confirmation_dialog.dart';
 
+@internal
 class NextcloudAppSettingsPage extends StatelessWidget {
   const NextcloudAppSettingsPage({
     required this.appImplementation,
diff --git a/packages/neon/neon/lib/src/pages/route_not_found.dart b/packages/neon/neon/lib/src/pages/route_not_found.dart
index 884172f2..804d792e 100644
--- a/packages/neon/neon/lib/src/pages/route_not_found.dart
+++ b/packages/neon/neon/lib/src/pages/route_not_found.dart
@@ -1,12 +1,14 @@
 import 'dart:async';
 
 import 'package:flutter/material.dart';
-import 'package:neon/blocs.dart';
+import 'package:meta/meta.dart';
 import 'package:neon/l10n/localizations.dart';
+import 'package:neon/src/blocs/accounts.dart';
 import 'package:neon/src/router.dart';
 import 'package:provider/provider.dart';
 import 'package:url_launcher/url_launcher.dart';
 
+@internal
 class RouteNotFoundPage extends StatefulWidget {
   const RouteNotFoundPage({
     required this.uri,
@@ -27,7 +29,7 @@ class _RouteNotFoundPageState extends State<RouteNotFoundPage> {
     unawaited(_checkLaunchable());
   }
 
-  Future _checkLaunchable() async {
+  Future<void> _checkLaunchable() async {
     final accountsBloc = Provider.of<AccountsBloc>(context, listen: false);
     if (!accountsBloc.hasAccounts) {
       return;
diff --git a/packages/neon/neon/lib/src/pages/settings.dart b/packages/neon/neon/lib/src/pages/settings.dart
index a9278e7f..1f233500 100644
--- a/packages/neon/neon/lib/src/pages/settings.dart
+++ b/packages/neon/neon/lib/src/pages/settings.dart
@@ -1,6 +1,7 @@
 import 'package:file_picker/file_picker.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_material_design_icons/flutter_material_design_icons.dart';
+import 'package:meta/meta.dart';
 import 'package:neon/l10n/localizations.dart';
 import 'package:neon/src/blocs/accounts.dart';
 import 'package:neon/src/models/account.dart';
@@ -26,6 +27,7 @@ import 'package:package_info_plus/package_info_plus.dart';
 import 'package:provider/provider.dart';
 import 'package:url_launcher/url_launcher_string.dart';
 
+@internal
 enum SettingsCategories {
   apps,
   theme,
@@ -37,6 +39,7 @@ enum SettingsCategories {
   other,
 }
 
+@internal
 class SettingsPage extends StatefulWidget {
   const SettingsPage({
     this.initialCategory,
diff --git a/packages/neon/neon/lib/src/platform/platform.dart b/packages/neon/neon/lib/src/platform/platform.dart
index 0bedd437..8c541890 100644
--- a/packages/neon/neon/lib/src/platform/platform.dart
+++ b/packages/neon/neon/lib/src/platform/platform.dart
@@ -16,7 +16,7 @@ abstract interface class NeonPlatform {
   /// Infers and configures the platform automatically.
   ///
   /// Required to be called before accessing [NeonPlatform.instance].
-  static Future setup() async {
+  static Future<void> setup() async {
     if (Platform.isAndroid) {
       _platform = const AndroidNeonPlatform();
     } else if (Platform.isLinux) {
@@ -55,5 +55,5 @@ abstract interface class NeonPlatform {
 
   FutureOr<String> get userAccessibleAppDataPath;
 
-  FutureOr init();
+  FutureOr<void> init();
 }
diff --git a/packages/neon/neon/lib/src/router.dart b/packages/neon/neon/lib/src/router.dart
index 38290042..6e666b70 100644
--- a/packages/neon/neon/lib/src/router.dart
+++ b/packages/neon/neon/lib/src/router.dart
@@ -62,7 +62,7 @@ class AppRouter extends GoRouter {
           routes: $appRoutes,
         );
 
-  static Page _buildErrorPage(final BuildContext context, final GoRouterState state) => MaterialPage(
+  static Page<void> _buildErrorPage(final BuildContext context, final GoRouterState state) => MaterialPage(
         child: RouteNotFoundPage(
           uri: state.uri,
         ),
diff --git a/packages/neon/neon/lib/src/settings/models/options_collection.dart b/packages/neon/neon/lib/src/settings/models/options_collection.dart
index 59e5b4a6..a2e5c310 100644
--- a/packages/neon/neon/lib/src/settings/models/options_collection.dart
+++ b/packages/neon/neon/lib/src/settings/models/options_collection.dart
@@ -14,7 +14,7 @@ abstract class OptionsCollection implements Exportable {
 
   /// Collection of options.
   @protected
-  Iterable<Option> get options;
+  Iterable<Option<dynamic>> get options;
 
   /// Resets all [options].
   ///
@@ -61,5 +61,5 @@ abstract class NextcloudAppOptions extends OptionsCollection {
   late final Iterable<OptionsCategory> categories;
 
   @override
-  late final Iterable<Option> options;
+  late final Iterable<Option<dynamic>> options;
 }
diff --git a/packages/neon/neon/lib/src/settings/models/storage.dart b/packages/neon/neon/lib/src/settings/models/storage.dart
index 3ce552af..307d9835 100644
--- a/packages/neon/neon/lib/src/settings/models/storage.dart
+++ b/packages/neon/neon/lib/src/settings/models/storage.dart
@@ -6,12 +6,12 @@ import 'package:shared_preferences/shared_preferences.dart';
 abstract interface class SettingsStorage {
   String? getString(final String key);
 
-  Future setString(final String key, final String value);
+  Future<bool> setString(final String key, final String value);
 
   bool? getBool(final String key);
 
   // ignore: avoid_positional_boolean_parameters
-  Future setBool(final String key, final bool value);
+  Future<bool> setBool(final String key, final bool value);
 
   Future<bool> remove(final String key);
 }
@@ -53,7 +53,7 @@ final class NeonStorage {
   /// Sets up the [SharedPreferences] instance.
   ///
   /// Required to be called before accessing [database].
-  static Future init() async {
+  static Future<void> init() async {
     if (_sharedPreferences != null) {
       return;
     }
@@ -86,16 +86,16 @@ final class SingleValueStorage {
 
   String? getString() => NeonStorage.database.getString(key.value);
 
-  Future setString(final String value) => NeonStorage.database.setString(key.value, value);
+  Future<bool> setString(final String value) => NeonStorage.database.setString(key.value, value);
 
   bool? getBool() => NeonStorage.database.getBool(key.value);
 
   // ignore: avoid_positional_boolean_parameters
-  Future setBool(final bool value) => NeonStorage.database.setBool(key.value, value);
+  Future<bool> setBool(final bool value) => NeonStorage.database.setBool(key.value, value);
 
   List<String>? getStringList() => NeonStorage.database.getStringList(key.value);
 
-  Future setStringList(final List<String> value) => NeonStorage.database.setStringList(key.value, value);
+  Future<bool> setStringList(final List<String> value) => NeonStorage.database.setStringList(key.value, value);
 }
 
 @immutable
@@ -130,16 +130,16 @@ final class AppStorage implements SettingsStorage {
   String? getString(final String key) => NeonStorage.database.getString(formatKey(key));
 
   @override
-  Future setString(final String key, final String value) => NeonStorage.database.setString(formatKey(key), value);
+  Future<bool> setString(final String key, final String value) => NeonStorage.database.setString(formatKey(key), value);
 
   @override
   bool? getBool(final String key) => NeonStorage.database.getBool(formatKey(key));
 
   @override
-  Future setBool(final String key, final bool value) => NeonStorage.database.setBool(formatKey(key), value);
+  Future<bool> setBool(final String key, final bool value) => NeonStorage.database.setBool(formatKey(key), value);
 
   List<String>? getStringList(final String key) => NeonStorage.database.getStringList(formatKey(key));
 
-  Future setStringList(final String key, final List<String> value) =>
+  Future<bool> setStringList(final String key, final List<String> value) =>
       NeonStorage.database.setStringList(formatKey(key), value);
 }
diff --git a/packages/neon/neon/lib/src/settings/utils/settings_export_helper.dart b/packages/neon/neon/lib/src/settings/utils/settings_export_helper.dart
index a5e34a5c..acda7208 100644
--- a/packages/neon/neon/lib/src/settings/utils/settings_export_helper.dart
+++ b/packages/neon/neon/lib/src/settings/utils/settings_export_helper.dart
@@ -74,6 +74,7 @@ class SettingsExportHelper {
 }
 
 /// Helper class to export [AppImplementation]s implementing the [Exportable] interface.
+@internal
 @immutable
 class AppImplementationsExporter implements Exportable {
   const AppImplementationsExporter(this.appImplementations);
@@ -109,6 +110,7 @@ class AppImplementationsExporter implements Exportable {
 }
 
 /// Helper class to export [Account]s implementing the [Exportable] interface.
+@internal
 @immutable
 class AccountsBlocExporter implements Exportable {
   const AccountsBlocExporter(this.accountsBloc);
diff --git a/packages/neon/neon/lib/src/settings/widgets/account_settings_tile.dart b/packages/neon/neon/lib/src/settings/widgets/account_settings_tile.dart
index ae62dbe2..1779e1ed 100644
--- a/packages/neon/neon/lib/src/settings/widgets/account_settings_tile.dart
+++ b/packages/neon/neon/lib/src/settings/widgets/account_settings_tile.dart
@@ -17,7 +17,7 @@ class AccountSettingsTile extends SettingsTile {
   final Account account;
   final Color? color;
   final Widget? trailing;
-  final VoidCallback? onTap;
+  final GestureTapCallback? onTap;
 
   @override
   Widget build(final BuildContext context) => NeonAccountTile(
diff --git a/packages/neon/neon/lib/src/settings/widgets/custom_settings_tile.dart b/packages/neon/neon/lib/src/settings/widgets/custom_settings_tile.dart
index f042bcc6..6e216943 100644
--- a/packages/neon/neon/lib/src/settings/widgets/custom_settings_tile.dart
+++ b/packages/neon/neon/lib/src/settings/widgets/custom_settings_tile.dart
@@ -17,7 +17,7 @@ class CustomSettingsTile extends SettingsTile {
   final Widget? subtitle;
   final Widget? leading;
   final Widget? trailing;
-  final Function()? onTap;
+  final GestureTapCallback? onTap;
 
   @override
   Widget build(final BuildContext context) => ListTile(
diff --git a/packages/neon/neon/lib/src/settings/widgets/settings_tile.dart b/packages/neon/neon/lib/src/settings/widgets/settings_tile.dart
index af1b770d..f0695e53 100644
--- a/packages/neon/neon/lib/src/settings/widgets/settings_tile.dart
+++ b/packages/neon/neon/lib/src/settings/widgets/settings_tile.dart
@@ -10,7 +10,7 @@ abstract class SettingsTile extends StatelessWidget {
 }
 
 @internal
-abstract class InputSettingsTile<T extends Option> extends SettingsTile {
+abstract class InputSettingsTile<T extends Option<dynamic>> extends SettingsTile {
   const InputSettingsTile({
     required this.option,
     super.key,
diff --git a/packages/neon/neon/lib/src/utils/account_options.dart b/packages/neon/neon/lib/src/utils/account_options.dart
index 2fa7f62c..f89bc393 100644
--- a/packages/neon/neon/lib/src/utils/account_options.dart
+++ b/packages/neon/neon/lib/src/utils/account_options.dart
@@ -30,7 +30,7 @@ class AccountSpecificOptions extends OptionsCollection {
   final AppsBloc _appsBloc;
 
   @override
-  late final List<Option> options = [
+  late final List<Option<dynamic>> options = [
     initialApp,
   ];
 
@@ -43,6 +43,7 @@ class AccountSpecificOptions extends OptionsCollection {
   );
 }
 
+@internal
 enum AccountOptionKeys implements Storable {
   initialApp._('initial-app');
 
diff --git a/packages/neon/neon/lib/src/utils/global_options.dart b/packages/neon/neon/lib/src/utils/global_options.dart
index f4821c06..0979608c 100644
--- a/packages/neon/neon/lib/src/utils/global_options.dart
+++ b/packages/neon/neon/lib/src/utils/global_options.dart
@@ -4,6 +4,7 @@ import 'package:flutter/material.dart';
 import 'package:meta/meta.dart';
 import 'package:neon/l10n/localizations.dart';
 import 'package:neon/src/models/account.dart';
+import 'package:neon/src/models/label_builder.dart';
 import 'package:neon/src/settings/models/option.dart';
 import 'package:neon/src/settings/models/options_collection.dart';
 import 'package:neon/src/settings/models/select_option.dart';
@@ -51,7 +52,7 @@ class GlobalOptions extends OptionsCollection {
 
   final PackageInfo _packageInfo;
 
-  late final _distributorsMap = <String, String Function(BuildContext)>{
+  late final _distributorsMap = <String, LabelBuilder>{
     _packageInfo.packageName: (final context) =>
         AppLocalizations.of(context).globalOptionsPushNotificationsDistributorFirebaseEmbedded,
     'com.github.gotify.up': (final context) =>
@@ -68,7 +69,7 @@ class GlobalOptions extends OptionsCollection {
   };
 
   @override
-  late final List<Option> options = [
+  late final List<Option<dynamic>> options = [
     themeMode,
     themeOLEDAsDark,
     themeKeepOriginalAccentColor,
@@ -101,7 +102,7 @@ class GlobalOptions extends OptionsCollection {
     }
   }
 
-  Future updateDistributors(final List<String> distributors) async {
+  Future<void> updateDistributors(final List<String> distributors) async {
     pushNotificationsDistributor.values = {
       for (final distributor in distributors) ...{
         distributor: _distributorsMap[distributor] ?? (final _) => distributor,
@@ -220,6 +221,7 @@ class GlobalOptions extends OptionsCollection {
   );
 }
 
+@internal
 enum GlobalOptionKeys implements Storable {
   themeMode._('theme-mode'),
   themeOledAsDark._('theme-oled-as-dark'),
@@ -240,6 +242,7 @@ enum GlobalOptionKeys implements Storable {
   final String value;
 }
 
+@internal
 enum NavigationMode {
   drawer,
   drawerAlwaysVisible,
diff --git a/packages/neon/neon/lib/src/utils/global_popups.dart b/packages/neon/neon/lib/src/utils/global_popups.dart
index 2cb8d377..9381d5c1 100644
--- a/packages/neon/neon/lib/src/utils/global_popups.dart
+++ b/packages/neon/neon/lib/src/utils/global_popups.dart
@@ -26,7 +26,7 @@ class GlobalPopups {
 
   bool _registered = false;
   late BuildContext _context;
-  final _subscriptions = <StreamSubscription>[];
+  final _subscriptions = <StreamSubscription<dynamic>>[];
 
   void dispose() {
     for (final subscription in _subscriptions) {
diff --git a/packages/neon/neon/lib/src/utils/push_utils.dart b/packages/neon/neon/lib/src/utils/push_utils.dart
index bf4f1639..f54e4e51 100644
--- a/packages/neon/neon/lib/src/utils/push_utils.dart
+++ b/packages/neon/neon/lib/src/utils/push_utils.dart
@@ -58,7 +58,7 @@ class PushUtils {
     return localNotificationsPlugin;
   }
 
-  static Future onMessage(final Uint8List messages, final String instance) async {
+  static Future<void> onMessage(final Uint8List messages, final String instance) async {
     WidgetsFlutterBinding.ensureInitialized();
 
     final localNotificationsPlugin = await initLocalNotifications(
diff --git a/packages/neon/neon/lib/src/utils/request_manager.dart b/packages/neon/neon/lib/src/utils/request_manager.dart
index ff462437..ec1b96ed 100644
--- a/packages/neon/neon/lib/src/utils/request_manager.dart
+++ b/packages/neon/neon/lib/src/utils/request_manager.dart
@@ -10,6 +10,11 @@ import 'package:rxdart/rxdart.dart';
 import 'package:sqflite/sqflite.dart';
 import 'package:xml/xml.dart' as xml;
 
+typedef UnwrapCallback<T, R> = T Function(R);
+typedef SerializeCallback<T> = String Function(T);
+typedef DeserializeCallback<T> = T Function(String);
+typedef NextcloudApiCallback<T> = Future<T> Function();
+
 class RequestManager {
   RequestManager();
 
@@ -22,19 +27,19 @@ class RequestManager {
   // ignore: prefer_constructors_over_static_methods
   static RequestManager get instance => _requestManager ??= RequestManager();
 
-  Future initCache() async {
+  Future<void> initCache() async {
     _cache = Cache();
     await _cache!.init();
   }
 
   Cache? _cache;
 
-  Future wrapNextcloud<T, R>(
+  Future<void> wrapNextcloud<T, R>(
     final String clientID,
     final String k,
     final BehaviorSubject<Result<T>> subject,
-    final Future<R> Function() call,
-    final T Function(R) unwrap, {
+    final NextcloudApiCallback<R> call,
+    final UnwrapCallback<T, R> unwrap, {
     final bool disableTimeout = false,
     final bool emitEmptyCache = false,
   }) async =>
@@ -51,12 +56,12 @@ class RequestManager {
         0,
       );
 
-  Future wrapWebDav<T>(
+  Future<void> wrapWebDav<T>(
     final String clientID,
     final String k,
     final BehaviorSubject<Result<T>> subject,
-    final Future<WebDavMultistatus> Function() call,
-    final T Function(WebDavMultistatus) unwrap, {
+    final NextcloudApiCallback<WebDavMultistatus> call,
+    final UnwrapCallback<T, WebDavMultistatus> unwrap, {
     final bool disableTimeout = false,
     final bool emitEmptyCache = false,
   }) async =>
@@ -73,14 +78,14 @@ class RequestManager {
         0,
       );
 
-  Future _wrap<T, R>(
+  Future<void> _wrap<T, R>(
     final String clientID,
     final String k,
     final BehaviorSubject<Result<T>> subject,
-    final Future<R> Function() call,
-    final T Function(R) unwrap,
-    final String Function(R) serialize,
-    final R Function(String) deserialize,
+    final NextcloudApiCallback<R> call,
+    final UnwrapCallback<T, R> unwrap,
+    final SerializeCallback<R> serialize,
+    final DeserializeCallback<R> deserialize,
     final bool disableTimeout,
     final bool emitEmptyCache,
     final int retries,
@@ -150,8 +155,8 @@ class RequestManager {
   Future<bool> _emitCached<T, R>(
     final String key,
     final BehaviorSubject<Result<T>> subject,
-    final T Function(R) unwrap,
-    final R Function(String) deserialize,
+    final UnwrapCallback<T, R> unwrap,
+    final DeserializeCallback<R> deserialize,
     final bool emitEmptyCache,
     final bool loading,
     final Object? error,
@@ -180,7 +185,7 @@ class RequestManager {
   }
 
   Future<T> timeout<T>(
-    final Future<T> Function() call,
+    final NextcloudApiCallback<T> call,
   ) =>
       call().timeout(const Duration(seconds: 30));
 }
@@ -189,7 +194,7 @@ class RequestManager {
 class Cache {
   Database? _database;
 
-  Future init() async {
+  Future<void> init() async {
     if (_database != null) {
       return;
     }
@@ -210,7 +215,7 @@ class Cache {
   Future<String?> get(final String key) async =>
       (await _database!.rawQuery('SELECT value FROM cache WHERE key = ?', [key]))[0]['value'] as String?;
 
-  Future set(final String key, final String value) async => _database!.rawQuery(
+  Future<void> set(final String key, final String value) async => _database!.rawQuery(
         'INSERT INTO cache (key, value) VALUES (?, ?) ON CONFLICT(key) DO UPDATE SET value = excluded.value',
         [key, value],
       );
diff --git a/packages/neon/neon/lib/src/utils/stream_listenable.dart b/packages/neon/neon/lib/src/utils/stream_listenable.dart
index 3f47903b..8005fe94 100644
--- a/packages/neon/neon/lib/src/utils/stream_listenable.dart
+++ b/packages/neon/neon/lib/src/utils/stream_listenable.dart
@@ -14,17 +14,17 @@ class StreamListenable extends ChangeNotifier {
       notifyListeners();
     }
 
-    addSubscription(stream);
+    _addSubscription(stream);
   }
 
   /// Listenable for multiple Streams.
   ///
   /// Notifies it's listeners on every event emitted by any of the streams.
   StreamListenable.multiListenable(final Iterable<Stream<dynamic>> streams) {
-    streams.forEach(addSubscription);
+    streams.forEach(_addSubscription);
   }
 
-  void addSubscription(final Stream<dynamic> stream) {
+  void _addSubscription(final Stream<dynamic> stream) {
     _subscriptions.add(
       stream.asBroadcastStream().listen((final _) {
         notifyListeners();
diff --git a/packages/neon/neon/lib/src/utils/user_agent.dart b/packages/neon/neon/lib/src/utils/user_agent.dart
index 4612edcc..f8f924ae 100644
--- a/packages/neon/neon/lib/src/utils/user_agent.dart
+++ b/packages/neon/neon/lib/src/utils/user_agent.dart
@@ -3,6 +3,7 @@ import 'package:package_info_plus/package_info_plus.dart';
 
 late String? _userAgent;
 
+@internal
 void buildUserAgent(final PackageInfo packageInfo) {
   var buildNumber = packageInfo.buildNumber;
   if (buildNumber.isEmpty) {
diff --git a/packages/neon/neon/lib/src/widgets/account_tile.dart b/packages/neon/neon/lib/src/widgets/account_tile.dart
index bffa171f..6361e938 100644
--- a/packages/neon/neon/lib/src/widgets/account_tile.dart
+++ b/packages/neon/neon/lib/src/widgets/account_tile.dart
@@ -25,7 +25,7 @@ class NeonAccountTile extends StatelessWidget {
   final Account account;
   final Color? color;
   final Widget? trailing;
-  final VoidCallback? onTap;
+  final GestureTapCallback? onTap;
   final Color? textColor;
   final bool dense;
   final bool showStatus;
diff --git a/packages/neon/neon/lib/src/widgets/app_bar.dart b/packages/neon/neon/lib/src/widgets/app_bar.dart
index c6a15f39..e6051f53 100644
--- a/packages/neon/neon/lib/src/widgets/app_bar.dart
+++ b/packages/neon/neon/lib/src/widgets/app_bar.dart
@@ -36,7 +36,7 @@ class _NeonAppBarState extends State<NeonAppBar> {
 
   final _searchBarFocusNode = FocusNode();
   final _searchTermController = StreamController<String>();
-  late final StreamSubscription _searchTermSubscription;
+  late final StreamSubscription<String> _searchTermSubscription;
 
   @override
   void initState() {
@@ -181,7 +181,7 @@ class _NotificationIconButtonState extends State<NotificationIconButton> {
   late AppsBloc _appsBloc;
   late List<Account> _accounts;
   late Account _account;
-  late StreamSubscription notificationSubscription;
+  late StreamSubscription<void> notificationSubscription;
 
   @override
   void initState() {
diff --git a/packages/neon/neon/lib/src/widgets/cached_image.dart b/packages/neon/neon/lib/src/widgets/cached_image.dart
index 68842406..61240bf0 100644
--- a/packages/neon/neon/lib/src/widgets/cached_image.dart
+++ b/packages/neon/neon/lib/src/widgets/cached_image.dart
@@ -5,15 +5,20 @@ import 'dart:typed_data';
 import 'package:flutter/material.dart';
 import 'package:flutter_cache_manager/flutter_cache_manager.dart';
 import 'package:flutter_svg/flutter_svg.dart';
+import 'package:neon/nextcloud.dart';
+import 'package:neon/src/blocs/accounts.dart';
 import 'package:neon/src/models/account.dart';
 import 'package:neon/src/widgets/exception.dart';
 import 'package:neon/src/widgets/linear_progress_indicator.dart';
+import 'package:provider/provider.dart';
 
 typedef CacheReviver = FutureOr<Uint8List?> Function(CacheManager cacheManager);
 typedef ImageDownloader = FutureOr<Uint8List> Function();
 typedef CacheWriter = Future<void> Function(CacheManager cacheManager, Uint8List image);
 typedef ErrorWidgetBuilder = Widget? Function(BuildContext, dynamic);
 
+typedef ApiImageDownloader = FutureOr<Uint8List> Function(NextcloudClient client);
+
 class NeonCachedImage extends StatefulWidget {
   const NeonCachedImage({
     required this.image,
@@ -186,3 +191,40 @@ class _NeonCachedImageState extends State<NeonCachedImage> {
         iconSize: widget.size?.shortestSide,
       );
 }
+
+class NeonApiImage extends StatelessWidget {
+  const NeonApiImage({
+    required this.getImage,
+    required this.cacheKey,
+    this.reviver,
+    this.writeCache,
+    this.isSvgHint = false,
+    this.size,
+    this.fit,
+    this.svgColor,
+    this.iconColor,
+    this.errorBuilder,
+    super.key,
+  });
+
+  final ApiImageDownloader getImage;
+  final String cacheKey;
+  final CacheReviver? reviver;
+  final CacheWriter? writeCache;
+  final bool isSvgHint;
+  final Size? size;
+  final BoxFit? fit;
+  final Color? svgColor;
+  final Color? iconColor;
+  final ErrorWidgetBuilder? errorBuilder;
+
+  @override
+  Widget build(final BuildContext context) {
+    final account = Provider.of<AccountsBloc>(context, listen: false).activeAccount.value!;
+
+    return NeonCachedImage.custom(
+      getImage: () async => getImage(account.client),
+      cacheKey: '${account.id}-$cacheKey',
+    );
+  }
+}
diff --git a/packages/neon/neon/lib/src/widgets/exception.dart b/packages/neon/neon/lib/src/widgets/exception.dart
index fdd6460c..c181b34f 100644
--- a/packages/neon/neon/lib/src/widgets/exception.dart
+++ b/packages/neon/neon/lib/src/widgets/exception.dart
@@ -22,7 +22,7 @@ class NeonException extends StatelessWidget {
   });
 
   final dynamic exception;
-  final Function() onRetry;
+  final VoidCallback onRetry;
   final bool onlyIcon;
   final double? iconSize;
   final Color? color;
diff --git a/packages/neon/neon/lib/src/widgets/list_view.dart b/packages/neon/neon/lib/src/widgets/list_view.dart
index 110c3ccb..c33aae02 100644
--- a/packages/neon/neon/lib/src/widgets/list_view.dart
+++ b/packages/neon/neon/lib/src/widgets/list_view.dart
@@ -19,7 +19,7 @@ class NeonListView<T> extends StatelessWidget {
   final Iterable<T>? items;
   final bool isLoading;
   final dynamic error;
-  final Future Function() onRefresh;
+  final RefreshCallback onRefresh;
   final Widget Function(BuildContext, T data) builder;
   final String? scrollKey;
   final bool withFloatingActionButton;
diff --git a/packages/neon/neon/test/option_test.dart b/packages/neon/neon/test/option_test.dart
index 585ddcd7..962ce645 100644
--- a/packages/neon/neon/test/option_test.dart
+++ b/packages/neon/neon/test/option_test.dart
@@ -45,7 +45,7 @@ void main() {
     late SelectOption<SelectValues> option;
 
     setUp(() {
-      when(() => storage.setString(key.value, any())).thenAnswer((final _) async {});
+      when(() => storage.setString(key.value, any())).thenAnswer((final _) async => true);
       when(() => storage.remove(key.value)).thenAnswer((final _) async => true);
 
       option = SelectOption<SelectValues>(
@@ -209,7 +209,7 @@ void main() {
     late ToggleOption option;
 
     setUp(() {
-      when(() => storage.setBool(key.value, any())).thenAnswer((final _) async {});
+      when(() => storage.setBool(key.value, any())).thenAnswer((final _) async => true);
       when(() => storage.remove(key.value)).thenAnswer((final _) async => true);
 
       option = ToggleOption(
diff --git a/packages/neon/neon/test/options_collection_test.dart b/packages/neon/neon/test/options_collection_test.dart
index e9cec416..f97f42e2 100644
--- a/packages/neon/neon/test/options_collection_test.dart
+++ b/packages/neon/neon/test/options_collection_test.dart
@@ -5,10 +5,10 @@ import 'package:neon/src/settings/models/storage.dart';
 import 'package:test/test.dart';
 
 // ignore: missing_override_of_must_be_overridden
-class OptionMock extends Mock implements Option {}
+class OptionMock extends Mock implements Option<Object> {}
 
 class Collection extends NextcloudAppOptions {
-  Collection(final List<Option> options) : super(const AppStorage(StorageKeys.apps)) {
+  Collection(final List<Option<Object>> options) : super(const AppStorage(StorageKeys.apps)) {
     super.options = options;
   }
 }
diff --git a/packages/neon/neon/test/settings_export_test.dart b/packages/neon/neon/test/settings_export_test.dart
index 3eedb039..6540b559 100644
--- a/packages/neon/neon/test/settings_export_test.dart
+++ b/packages/neon/neon/test/settings_export_test.dart
@@ -4,7 +4,7 @@ import 'dart:convert';
 import 'dart:typed_data';
 
 import 'package:mocktail/mocktail.dart';
-import 'package:neon/blocs.dart';
+import 'package:neon/src/blocs/accounts.dart';
 import 'package:neon/src/models/account.dart';
 import 'package:neon/src/models/app_implementation.dart';
 import 'package:neon/src/settings/models/exportable.dart';
diff --git a/packages/neon/neon_files/lib/blocs/browser.dart b/packages/neon/neon_files/lib/blocs/browser.dart
index 15411e2a..ca54bb98 100644
--- a/packages/neon/neon_files/lib/blocs/browser.dart
+++ b/packages/neon/neon_files/lib/blocs/browser.dart
@@ -1,12 +1,12 @@
 part of '../neon_files.dart';
 
-abstract class FilesBrowserBlocEvents {
+abstract interface class FilesBrowserBlocEvents {
   void setPath(final List<String> path);
 
   void createFolder(final List<String> path);
 }
 
-abstract class FilesBrowserBlocStates {
+abstract interface class FilesBrowserBlocStates {
   BehaviorSubject<Result<List<WebDavFile>>> get files;
 
   BehaviorSubject<List<String>> get path;
@@ -37,7 +37,7 @@ class FilesBrowserBloc extends InteractiveBloc implements FilesBrowserBlocEvents
   BehaviorSubject<List<String>> path = BehaviorSubject<List<String>>.seeded([]);
 
   @override
-  Future refresh() async {
+  Future<void> refresh() async {
     await RequestManager.instance.wrapWebDav<List<WebDavFile>>(
       account.id,
       'files-${path.value.join('/')}',
diff --git a/packages/neon/neon_files/lib/blocs/files.dart b/packages/neon/neon_files/lib/blocs/files.dart
index 855f1b0c..56b43d1f 100644
--- a/packages/neon/neon_files/lib/blocs/files.dart
+++ b/packages/neon/neon_files/lib/blocs/files.dart
@@ -1,6 +1,6 @@
 part of '../neon_files.dart';
 
-abstract class FilesBlocEvents {
+abstract interface class FilesBlocEvents {
   void uploadFile(final List<String> path, final String localPath);
 
   void syncFile(final List<String> path);
@@ -20,7 +20,7 @@ abstract class FilesBlocEvents {
   void removeFavorite(final List<String> path);
 }
 
-abstract class FilesBlocStates {
+abstract interface class FilesBlocStates {
   BehaviorSubject<List<FilesTask>> get tasks;
 }
 
@@ -103,7 +103,7 @@ class FilesBloc extends InteractiveBloc implements FilesBlocEvents, FilesBlocSta
   }
 
   @override
-  Future refresh() async {
+  Future<void> refresh() async {
     await browser.refresh();
   }
 
@@ -164,7 +164,7 @@ class FilesBloc extends InteractiveBloc implements FilesBlocEvents, FilesBlocSta
     );
   }
 
-  Future _downloadFile(
+  Future<void> _downloadFile(
     final List<String> path,
     final File file,
   ) async {
diff --git a/packages/neon/neon_files/lib/dialogs/choose_create.dart b/packages/neon/neon_files/lib/dialogs/choose_create.dart
index c86b3f3e..73f16c74 100644
--- a/packages/neon/neon_files/lib/dialogs/choose_create.dart
+++ b/packages/neon/neon_files/lib/dialogs/choose_create.dart
@@ -15,7 +15,7 @@ class FilesChooseCreateDialog extends StatefulWidget {
 }
 
 class _FilesChooseCreateDialogState extends State<FilesChooseCreateDialog> {
-  Future uploadFromPick(final FileType type) async {
+  Future<void> uploadFromPick(final FileType type) async {
     final result = await FilePicker.platform.pickFiles(
       allowMultiple: true,
       type: type,
@@ -27,7 +27,7 @@ class _FilesChooseCreateDialogState extends State<FilesChooseCreateDialog> {
     }
   }
 
-  Future upload(final File file) async {
+  Future<void> upload(final File file) async {
     final sizeWarning = widget.bloc.options.uploadSizeWarning.value;
     if (sizeWarning != null) {
       final stat = file.statSync();
diff --git a/packages/neon/neon_files/lib/neon_files.dart b/packages/neon/neon_files/lib/neon_files.dart
index 026b2165..b978663e 100644
--- a/packages/neon/neon_files/lib/neon_files.dart
+++ b/packages/neon/neon_files/lib/neon_files.dart
@@ -52,7 +52,7 @@ class FilesApp extends AppImplementation<FilesBloc, FilesAppSpecificOptions> {
   final String id = AppIDs.files;
 
   @override
-  final LocalizationsDelegate localizationsDelegate = AppLocalizations.delegate;
+  final LocalizationsDelegate<AppLocalizations> localizationsDelegate = AppLocalizations.delegate;
 
   @override
   final List<Locale> supportedLocales = AppLocalizations.supportedLocales;
diff --git a/packages/neon/neon_files/lib/options.dart b/packages/neon/neon_files/lib/options.dart
index 620b3857..6dfff087 100644
--- a/packages/neon/neon_files/lib/options.dart
+++ b/packages/neon/neon_files/lib/options.dart
@@ -86,7 +86,7 @@ class FilesAppSpecificOptions extends NextcloudAppOptions {
     },
   );
 
-  late final _sizeWarningValues = <int?, String Function(BuildContext)>{
+  late final _sizeWarningValues = <int?, LabelBuilder>{
     null: (final context) => AppLocalizations.of(context).optionsSizeWarningDisabled,
     for (final i in [
       1,
diff --git a/packages/neon/neon_files/lib/utils/task.dart b/packages/neon/neon_files/lib/utils/task.dart
index 2a61e97b..1a302eeb 100644
--- a/packages/neon/neon_files/lib/utils/task.dart
+++ b/packages/neon/neon_files/lib/utils/task.dart
@@ -23,7 +23,7 @@ class FilesDownloadTask extends FilesTask {
     required super.file,
   });
 
-  Future execute(final NextcloudClient client) async {
+  Future<void> execute(final NextcloudClient client) async {
     await client.webdav.getFile(
       Uri(pathSegments: path),
       file,
@@ -43,7 +43,7 @@ class FilesUploadTask extends FilesTask {
   FileStat? _stat;
   FileStat get stat => _stat ??= file.statSync();
 
-  Future execute(final NextcloudClient client) async {
+  Future<void> execute(final NextcloudClient client) async {
     await client.webdav.putFile(
       file,
       stat,
diff --git a/packages/neon/neon_files/lib/widgets/file_preview.dart b/packages/neon/neon_files/lib/widgets/file_preview.dart
index f1cebde2..5a76d077 100644
--- a/packages/neon/neon_files/lib/widgets/file_preview.dart
+++ b/packages/neon/neon_files/lib/widgets/file_preview.dart
@@ -41,9 +41,7 @@ class FilePreview extends StatelessWidget {
             valueListenable: bloc.options.showPreviewsOption,
             builder: (final context, final showPreviews, final child) {
               if (showPreviews && (details.hasPreview ?? false)) {
-                final account = Provider.of<AccountsBloc>(context, listen: false).activeAccount.value!;
                 final preview = FilePreviewImage(
-                  account: account,
                   file: details,
                   size: size,
                 );
@@ -72,19 +70,17 @@ class FilePreview extends StatelessWidget {
   }
 }
 
-class FilePreviewImage extends NeonCachedImage {
+class FilePreviewImage extends NeonApiImage {
   factory FilePreviewImage({
-    required final Account account,
     required final FileDetails file,
     required final Size size,
   }) {
     final width = size.width.toInt();
     final height = size.height.toInt();
     final path = file.path.join('/');
-    final cacheKey = '${account.id}-preview-$path-$width-$height';
+    final cacheKey = 'preview-$path-$width-$height';
 
     return FilePreviewImage._(
-      account: account,
       file: file,
       size: size,
       cacheKey: cacheKey,
@@ -95,15 +91,14 @@ class FilePreviewImage extends NeonCachedImage {
   }
 
   FilePreviewImage._({
-    required final Account account,
     required final FileDetails file,
     required Size super.size,
     required super.cacheKey,
     required final String path,
     required final int width,
     required final int height,
-  }) : super.custom(
-          getImage: () async => account.client.core.preview.getPreview(
+  }) : super(
+          getImage: (final client) async => client.core.preview.getPreview(
             file: path,
             x: width,
             y: height,
diff --git a/packages/neon/neon_news/lib/blocs/article.dart b/packages/neon/neon_news/lib/blocs/article.dart
index 5795ff6f..7ccc7aed 100644
--- a/packages/neon/neon_news/lib/blocs/article.dart
+++ b/packages/neon/neon_news/lib/blocs/article.dart
@@ -1,6 +1,6 @@
 part of '../neon_news.dart';
 
-abstract class NewsArticleBlocEvents {
+abstract interface class NewsArticleBlocEvents {
   void markArticleAsRead();
 
   void markArticleAsUnread();
@@ -10,7 +10,7 @@ abstract class NewsArticleBlocEvents {
   void unstarArticle();
 }
 
-abstract class NewsArticleBlocStates {
+abstract interface class NewsArticleBlocStates {
   BehaviorSubject<bool> get unread;
 
   BehaviorSubject<bool> get starred;
@@ -44,7 +44,7 @@ class NewsArticleBloc extends InteractiveBloc implements NewsArticleBlocEvents,
   BehaviorSubject<bool> unread = BehaviorSubject<bool>();
 
   @override
-  Future refresh() async {}
+  Future<void> refresh() async {}
 
   @override
   void markArticleAsRead() {
@@ -78,7 +78,7 @@ class NewsArticleBloc extends InteractiveBloc implements NewsArticleBlocEvents,
     });
   }
 
-  void _wrapArticleAction(final Future Function() call) => wrapAction(
+  void _wrapArticleAction(final AsyncCallback call) => wrapAction(
         call,
         refresh: () async {
           await _newsArticlesBloc.refresh();
diff --git a/packages/neon/neon_news/lib/blocs/articles.dart b/packages/neon/neon_news/lib/blocs/articles.dart
index f8ae1f55..c8ae115f 100644
--- a/packages/neon/neon_news/lib/blocs/articles.dart
+++ b/packages/neon/neon_news/lib/blocs/articles.dart
@@ -11,7 +11,7 @@ enum ListType {
   folder,
 }
 
-abstract class NewsArticlesBlocEvents {
+abstract interface class NewsArticlesBlocEvents {
   void setFilterType(final FilterType type);
 
   void markArticleAsRead(final NewsArticle article);
@@ -23,7 +23,7 @@ abstract class NewsArticlesBlocEvents {
   void unstarArticle(final NewsArticle article);
 }
 
-abstract class NewsArticlesBlocStates {
+abstract interface class NewsArticlesBlocStates {
   BehaviorSubject<Result<List<NewsArticle>>> get articles;
 
   BehaviorSubject<FilterType> get filterType;
@@ -75,14 +75,14 @@ class NewsArticlesBloc extends InteractiveBloc implements NewsArticlesBlocEvents
   BehaviorSubject<FilterType> filterType = BehaviorSubject<FilterType>();
 
   @override
-  Future refresh() async {
+  Future<void> refresh() async {
     if (this is! NewsMainArticlesBloc) {
       await reload();
     }
     await _newsBloc.refresh();
   }
 
-  Future reload() async {
+  Future<void> reload() async {
     // The API for pagination is pretty useless in this case sadly. So no pagination for us :(
     // https://github.com/nextcloud/news/blob/master/docs/api/api-v1-2.md#get-items
 
diff --git a/packages/neon/neon_news/lib/blocs/news.dart b/packages/neon/neon_news/lib/blocs/news.dart
index d1022df4..c82c6c02 100644
--- a/packages/neon/neon_news/lib/blocs/news.dart
+++ b/packages/neon/neon_news/lib/blocs/news.dart
@@ -1,6 +1,6 @@
 part of '../neon_news.dart';
 
-abstract class NewsBlocEvents {
+abstract interface class NewsBlocEvents {
   void addFeed(final String url, final int? folderId);
 
   void removeFeed(final int feedId);
@@ -20,7 +20,7 @@ abstract class NewsBlocEvents {
   void markFolderAsRead(final int folderId);
 }
 
-abstract class NewsBlocStates {
+abstract interface class NewsBlocStates {
   BehaviorSubject<Result<List<NewsFolder>>> get folders;
 
   BehaviorSubject<Result<List<NewsFeed>>> get feeds;
@@ -90,7 +90,7 @@ class NewsBloc extends InteractiveBloc implements NewsBlocEvents, NewsBlocStates
   late BehaviorSubject<FilterType> filterType = mainArticlesBloc.filterType;
 
   @override
-  Future refresh() async {
+  Future<void> refresh() async {
     await Future.wait([
       RequestManager.instance.wrapNextcloud<List<NewsFolder>, NewsListFolders>(
         account.id,
@@ -187,7 +187,7 @@ class NewsBloc extends InteractiveBloc implements NewsBlocEvents, NewsBlocStates
   }
 
   @override
-  Future reload() async {
+  Future<void> reload() async {
     await mainArticlesBloc.reload();
   }
 }
diff --git a/packages/neon/neon_news/lib/neon_news.dart b/packages/neon/neon_news/lib/neon_news.dart
index f8d999db..63b766bf 100644
--- a/packages/neon/neon_news/lib/neon_news.dart
+++ b/packages/neon/neon_news/lib/neon_news.dart
@@ -2,6 +2,7 @@ library neon_news;
 
 import 'dart:async';
 
+import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
 import 'package:flutter_html/flutter_html.dart';
@@ -59,7 +60,7 @@ class NewsApp extends AppImplementation<NewsBloc, NewsAppSpecificOptions> {
   final String id = AppIDs.news;
 
   @override
-  final LocalizationsDelegate localizationsDelegate = AppLocalizations.delegate;
+  final LocalizationsDelegate<AppLocalizations> localizationsDelegate = AppLocalizations.delegate;
 
   @override
   final List<Locale> supportedLocales = AppLocalizations.supportedLocales;
diff --git a/packages/neon/neon_news/lib/pages/article.dart b/packages/neon/neon_news/lib/pages/article.dart
index e2ccda80..43a61870 100644
--- a/packages/neon/neon_news/lib/pages/article.dart
+++ b/packages/neon/neon_news/lib/pages/article.dart
@@ -63,7 +63,7 @@ class _NewsArticlePageState extends State<NewsArticlePage> {
     super.dispose();
   }
 
-  Future _startMarkAsReadTimer() async {
+  Future<void> _startMarkAsReadTimer() async {
     if (await widget.bloc.unread.first) {
       if (widget.articlesBloc.options.articleDisableMarkAsReadTimeoutOption.value) {
         widget.bloc.markArticleAsRead();
diff --git a/packages/neon/neon_news/lib/widgets/folder_select.dart b/packages/neon/neon_news/lib/widgets/folder_select.dart
index e8dd9c38..569d3dd7 100644
--- a/packages/neon/neon_news/lib/widgets/folder_select.dart
+++ b/packages/neon/neon_news/lib/widgets/folder_select.dart
@@ -9,7 +9,7 @@ class NewsFolderSelect extends StatelessWidget {
   });
 
   final List<NewsFolder> folders;
-  final void Function(NewsFolder?) onChanged;
+  final ValueChanged<NewsFolder?> onChanged;
   final NewsFolder? value;
 
   @override
diff --git a/packages/neon/neon_notes/lib/blocs/note.dart b/packages/neon/neon_notes/lib/blocs/note.dart
index 88d4bf89..de552b54 100644
--- a/packages/neon/neon_notes/lib/blocs/note.dart
+++ b/packages/neon/neon_notes/lib/blocs/note.dart
@@ -1,6 +1,6 @@
 part of '../neon_notes.dart';
 
-abstract class NotesNoteBlocEvents {
+abstract interface class NotesNoteBlocEvents {
   void updateContent(final String content);
 
   void updateTitle(final String title);
@@ -8,7 +8,7 @@ abstract class NotesNoteBlocEvents {
   void updateCategory(final String category);
 }
 
-abstract class NotesNoteBlocStates {
+abstract interface class NotesNoteBlocStates {
   BehaviorSubject<String> get category;
 }
 
@@ -62,7 +62,7 @@ class NotesNoteBloc extends InteractiveBloc implements NotesNoteBlocEvents, Note
   BehaviorSubject<String> category = BehaviorSubject<String>();
 
   @override
-  Future refresh() async {}
+  Future<void> refresh() async {}
 
   @override
   void updateCategory(final String category) {
diff --git a/packages/neon/neon_notes/lib/blocs/notes.dart b/packages/neon/neon_notes/lib/blocs/notes.dart
index 95642765..2f24714b 100644
--- a/packages/neon/neon_notes/lib/blocs/notes.dart
+++ b/packages/neon/neon_notes/lib/blocs/notes.dart
@@ -1,6 +1,6 @@
 part of '../neon_notes.dart';
 
-abstract class NotesBlocEvents {
+abstract interface class NotesBlocEvents {
   void createNote({
     final String title = '',
     final String category = '',
@@ -18,7 +18,7 @@ abstract class NotesBlocEvents {
   void deleteNote(final int id);
 }
 
-abstract class NotesBlocStates {
+abstract interface class NotesBlocStates {
   BehaviorSubject<Result<List<NotesNote>>> get notes;
 }
 
@@ -43,8 +43,8 @@ class NotesBloc extends InteractiveBloc implements NotesBlocEvents, NotesBlocSta
   BehaviorSubject<Result<List<NotesNote>>> notes = BehaviorSubject<Result<List<NotesNote>>>();
 
   @override
-  Future refresh() async {
-    await RequestManager.instance.wrapNextcloud<List<NotesNote>, BuiltList>(
+  Future<void> refresh() async {
+    await RequestManager.instance.wrapNextcloud<List<NotesNote>, BuiltList<NotesNote>>(
       account.id,
       'notes-notes',
       notes,
diff --git a/packages/neon/neon_notes/lib/neon_notes.dart b/packages/neon/neon_notes/lib/neon_notes.dart
index 32309451..5140bee3 100644
--- a/packages/neon/neon_notes/lib/neon_notes.dart
+++ b/packages/neon/neon_notes/lib/neon_notes.dart
@@ -52,7 +52,7 @@ class NotesApp extends AppImplementation<NotesBloc, NotesAppSpecificOptions> {
   final List<Locale> supportedLocales = AppLocalizations.supportedLocales;
 
   @override
-  final LocalizationsDelegate localizationsDelegate = AppLocalizations.delegate;
+  final LocalizationsDelegate<AppLocalizations> localizationsDelegate = AppLocalizations.delegate;
 
   @override
   late final NotesAppSpecificOptions options = NotesAppSpecificOptions(storage);
diff --git a/packages/neon/neon_notes/lib/widgets/category_select.dart b/packages/neon/neon_notes/lib/widgets/category_select.dart
index ca5a8f54..d153f6a3 100644
--- a/packages/neon/neon_notes/lib/widgets/category_select.dart
+++ b/packages/neon/neon_notes/lib/widgets/category_select.dart
@@ -22,7 +22,7 @@ class NotesCategorySelect extends StatelessWidget {
   final List<String> categories;
   final String? initialValue;
   final Function(String category) onChanged;
-  final Function() onSubmitted;
+  final VoidCallback onSubmitted;
 
   @override
   Widget build(final BuildContext context) => Autocomplete<String>(
diff --git a/packages/neon/neon_notifications/lib/blocs/notifications.dart b/packages/neon/neon_notifications/lib/blocs/notifications.dart
index e80a4433..e0da4a9f 100644
--- a/packages/neon/neon_notifications/lib/blocs/notifications.dart
+++ b/packages/neon/neon_notifications/lib/blocs/notifications.dart
@@ -49,7 +49,7 @@ class NotificationsBloc extends InteractiveBloc
   BehaviorSubject<int> unreadCounter = BehaviorSubject<int>();
 
   @override
-  Future refresh() async {
+  Future<void> refresh() async {
     await RequestManager.instance
         .wrapNextcloud<List<NotificationsNotification>, NotificationsEndpointListNotificationsResponseApplicationJson>(
       _account.id,
diff --git a/packages/neon/neon_notifications/lib/neon_notifications.dart b/packages/neon/neon_notifications/lib/neon_notifications.dart
index a795f8a7..271969cd 100644
--- a/packages/neon/neon_notifications/lib/neon_notifications.dart
+++ b/packages/neon/neon_notifications/lib/neon_notifications.dart
@@ -29,7 +29,7 @@ class NotificationsApp extends AppImplementation<NotificationsBloc, Notification
   final String id = AppIDs.notifications;
 
   @override
-  final LocalizationsDelegate localizationsDelegate = AppLocalizations.delegate;
+  final LocalizationsDelegate<AppLocalizations> localizationsDelegate = AppLocalizations.delegate;
 
   @override
   final List<Locale> supportedLocales = AppLocalizations.supportedLocales;
diff --git a/packages/neon/neon_notifications/lib/pages/main.dart b/packages/neon/neon_notifications/lib/pages/main.dart
index 39cdd284..6b2e9d37 100644
--- a/packages/neon/neon_notifications/lib/pages/main.dart
+++ b/packages/neon/neon_notifications/lib/pages/main.dart
@@ -89,6 +89,7 @@ class _NotificationsMainPageState extends State<NotificationsMainPage> {
           return;
         }
         if (app != null) {
+          // TODO: use go_router once implemented
           final accountsBloc = Provider.of<AccountsBloc>(context, listen: false);
           await accountsBloc.activeAppsBloc.setActiveApp(app.id);
         } else {
diff --git a/packages/neon_lints/lib/src/base.yaml b/packages/neon_lints/lib/src/base.yaml
index 0aa65d92..b048b60f 100644
--- a/packages/neon_lints/lib/src/base.yaml
+++ b/packages/neon_lints/lib/src/base.yaml
@@ -1,6 +1,7 @@
 analyzer:
   language:
     strict-casts: true
+    strict-raw-types: true
   errors:
     flutter_style_todos: ignore
     todo: ignore
diff --git a/packages/neon_lints/lint_maker.yaml b/packages/neon_lints/lint_maker.yaml
index f7070cc1..a25a9e09 100644
--- a/packages/neon_lints/lint_maker.yaml
+++ b/packages/neon_lints/lint_maker.yaml
@@ -19,6 +19,7 @@ dart:
     analyzer:
       language:
         strict-casts: true
+        strict-raw-types: true
       errors:
         flutter_style_todos: ignore
         todo: ignore
diff --git a/packages/nextcloud/lib/src/api/news.openapi.dart b/packages/nextcloud/lib/src/api/news.openapi.dart
index db89a711..c563cc86 100644
--- a/packages/nextcloud/lib/src/api/news.openapi.dart
+++ b/packages/nextcloud/lib/src/api/news.openapi.dart
@@ -154,7 +154,7 @@ class NewsClient extends DynamiteClient {
     throw await NewsApiException.fromResponse(response); // coverage:ignore-line
   }
 
-  Future renameFolder({
+  Future<void> renameFolder({
     required final int folderId,
     required final String name,
   }) async {
@@ -183,7 +183,7 @@ class NewsClient extends DynamiteClient {
     throw await NewsApiException.fromResponse(response); // coverage:ignore-line
   }
 
-  Future deleteFolder({required final int folderId}) async {
+  Future<void> deleteFolder({required final int folderId}) async {
     var path = '/index.php/apps/news/api/v1-3/folders/{folderId}';
     final queryParameters = <String, dynamic>{};
     final headers = <String, String>{};
@@ -208,7 +208,7 @@ class NewsClient extends DynamiteClient {
     throw await NewsApiException.fromResponse(response); // coverage:ignore-line
   }
 
-  Future markFolderAsRead({
+  Future<void> markFolderAsRead({
     required final int folderId,
     required final int newestItemId,
   }) async {
@@ -298,7 +298,7 @@ class NewsClient extends DynamiteClient {
     throw await NewsApiException.fromResponse(response); // coverage:ignore-line
   }
 
-  Future deleteFeed({required final int feedId}) async {
+  Future<void> deleteFeed({required final int feedId}) async {
     var path = '/index.php/apps/news/api/v1-3/feeds/{feedId}';
     final queryParameters = <String, dynamic>{};
     final headers = <String, String>{};
@@ -323,7 +323,7 @@ class NewsClient extends DynamiteClient {
     throw await NewsApiException.fromResponse(response); // coverage:ignore-line
   }
 
-  Future moveFeed({
+  Future<void> moveFeed({
     required final int feedId,
     final int? folderId,
   }) async {
@@ -354,7 +354,7 @@ class NewsClient extends DynamiteClient {
     throw await NewsApiException.fromResponse(response); // coverage:ignore-line
   }
 
-  Future renameFeed({
+  Future<void> renameFeed({
     required final int feedId,
     required final String feedTitle,
   }) async {
@@ -383,7 +383,7 @@ class NewsClient extends DynamiteClient {
     throw await NewsApiException.fromResponse(response); // coverage:ignore-line
   }
 
-  Future markFeedAsRead({
+  Future<void> markFeedAsRead({
     required final int feedId,
     required final int newestItemId,
   }) async {
@@ -504,7 +504,7 @@ class NewsClient extends DynamiteClient {
     throw await NewsApiException.fromResponse(response); // coverage:ignore-line
   }
 
-  Future markArticleAsRead({required final int itemId}) async {
+  Future<void> markArticleAsRead({required final int itemId}) async {
     var path = '/index.php/apps/news/api/v1-3/items/{itemId}/read';
     final queryParameters = <String, dynamic>{};
     final headers = <String, String>{};
@@ -529,7 +529,7 @@ class NewsClient extends DynamiteClient {
     throw await NewsApiException.fromResponse(response); // coverage:ignore-line
   }
 
-  Future markArticleAsUnread({required final int itemId}) async {
+  Future<void> markArticleAsUnread({required final int itemId}) async {
     var path = '/index.php/apps/news/api/v1-3/items/{itemId}/unread';
     final queryParameters = <String, dynamic>{};
     final headers = <String, String>{};
@@ -554,7 +554,7 @@ class NewsClient extends DynamiteClient {
     throw await NewsApiException.fromResponse(response); // coverage:ignore-line
   }
 
-  Future starArticle({required final int itemId}) async {
+  Future<void> starArticle({required final int itemId}) async {
     var path = '/index.php/apps/news/api/v1-3/items/{itemId}/star';
     final queryParameters = <String, dynamic>{};
     final headers = <String, String>{};
@@ -579,7 +579,7 @@ class NewsClient extends DynamiteClient {
     throw await NewsApiException.fromResponse(response); // coverage:ignore-line
   }
 
-  Future unstarArticle({required final int itemId}) async {
+  Future<void> unstarArticle({required final int itemId}) async {
     var path = '/index.php/apps/news/api/v1-3/items/{itemId}/unstar';
     final queryParameters = <String, dynamic>{};
     final headers = <String, String>{};
diff --git a/packages/nextcloud/lib/src/webdav/client.dart b/packages/nextcloud/lib/src/webdav/client.dart
index 23bd0068..e045f0dc 100644
--- a/packages/nextcloud/lib/src/webdav/client.dart
+++ b/packages/nextcloud/lib/src/webdav/client.dart
@@ -214,7 +214,7 @@ class WebDavClient {
       );
 
   /// Gets the content of the file at [path].
-  Future getFile(
+  Future<void> getFile(
     final Uri path,
     final File file, {
     final Function(double progress)? onProgress,
diff --git a/packages/nextcloud/test/helper.dart b/packages/nextcloud/test/helper.dart
index 689f907c..47d104a3 100644
--- a/packages/nextcloud/test/helper.dart
+++ b/packages/nextcloud/test/helper.dart
@@ -20,7 +20,7 @@ class DockerContainer {
 
   final int port;
 
-  Future runOccCommand(final List<String> args) async {
+  Future<void> runOccCommand(final List<String> args) async {
     final result = await runExecutableArguments(
       'docker',
       [
diff --git a/packages/nextcloud/test/notifications_test.dart b/packages/nextcloud/test/notifications_test.dart
index 6b3d8102..62f245be 100644
--- a/packages/nextcloud/test/notifications_test.dart
+++ b/packages/nextcloud/test/notifications_test.dart
@@ -21,7 +21,7 @@ void main() {
     });
     tearDown(() => container.destroy());
 
-    Future sendTestNotification() async {
+    Future<void> sendTestNotification() async {
       await client.notifications.api.generateNotification(
         userId: 'admin',
         shortMessage: '123',
diff --git a/packages/nextcloud/test/settings_test.dart b/packages/nextcloud/test/settings_test.dart
index f941fa81..b6d27e22 100644
--- a/packages/nextcloud/test/settings_test.dart
+++ b/packages/nextcloud/test/settings_test.dart
@@ -4,11 +4,11 @@ import 'package:test/test.dart';
 
 import 'helper.dart';
 
-Future main() async {
+Future<void> main() async {
   await run(await getDockerImage());
 }
 
-Future run(final DockerImage image) async {
+Future<void> run(final DockerImage image) async {
   group('settings', () {
     late DockerContainer container;
     late TestNextcloudClient client;
diff --git a/packages/sort_box/lib/sort_box.dart b/packages/sort_box/lib/sort_box.dart
index c7e4eca4..55a12586 100644
--- a/packages/sort_box/lib/sort_box.dart
+++ b/packages/sort_box/lib/sort_box.dart
@@ -1,5 +1,5 @@
 /// Signature of a function returning a [Comparable].
-typedef ComparableGetter<T> = Comparable Function(T);
+typedef ComparableGetter<T> = Comparable<Object> Function(T);
 
 /// Sorting Box to sort [List]s on multiple properties.
 class SortBox<T extends Enum, R> {