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/api/marianumconnect/marianumconnect_endpoint.dart

@@ -0,0 +1,22 @@
+import '../../storage/dev_tools_settings.dart';
+
+/// Singleton holding the currently active Marianum-Connect base URL. Fed by a
+/// SettingsCubit listener in app.dart so every dio call picks up endpoint
+/// changes without holding a reference to the cubit.
+class MarianumConnectEndpoint {
+  static String _baseUrl = DevToolsSettings.liveUrl;
+
+  static String current() => _baseUrl;
+
+  static void update(String baseUrl) {
+    _baseUrl = baseUrl;
+  }
+
+  /// Joins the base URL with the mobile API prefix and the given path.
+  static String resolve(String relativePath) {
+    final path = relativePath.startsWith('/')
+        ? relativePath.substring(1)
+        : relativePath;
+    return '$_baseUrl/api/mobile/v1/$path';
+  }
+}