migrated timetable integration from WebUntis to the MarianumConnect API, implementing a Dio-based client with bearer token authentication, background session validation, and auto-refresh logic.

lib/view/pages/settings/data/default_settings.dart

@@ -62,6 +62,8 @@ class DefaultSettings {
       checkerboardOffscreenLayers: false,
       checkerboardRasterCacheImages: false,
       showPerformanceOverlay: false,
+      marianumConnectEndpoint: MarianumConnectEndpoint.live,
+      marianumConnectCustomUrl: '',
     ),
   );
 }