added guardian login with views for their assigned childs

lib/api/marianumconnect/auth/token_storage.dart

@@ -1,5 +1,8 @@
+import 'package:dio/dio.dart';
 import 'package:flutter_secure_storage/flutter_secure_storage.dart';
 
+import '../../errors/auth_exception.dart';
+
 /// `first_unlock` accessibility so the token can be read during background
 /// requests (telemetry heartbeat, push-triggered syncs) after the first device
 /// unlock following a reboot. The keychain default (`whenUnlocked`) throws
@@ -9,7 +12,7 @@ const IOSOptions _mcIosOptions = IOSOptions(
 );
 
 /// Persists the Marianum-Connect bearer token in the platform keystore. Kept
-/// separate from `AccountData` because the username/password live on (Nextcloud
+/// separate from `SessionManager` because the username/password live on (Nextcloud
 /// + MHSL still need them) while the MC token is short-lived and per-endpoint.
 class MarianumConnectTokenStorage {
   static const _tokenKey = 'mc_bearer_token';
@@ -24,6 +27,18 @@ class MarianumConnectTokenStorage {
 
   Future<String?> readToken() => _storage.read(key: _tokenKey);
 
+  /// Request options carrying the stored token, for probes that bypass the
+  /// auth interceptor. Throws [AuthException] when no token is stored.
+  Future<Options> requireBearerOptions(String caller) async {
+    final token = await readToken();
+    if (token == null || token.isEmpty) {
+      throw AuthException.unauthorized(
+        technicalDetails: '$caller: no bearer token in storage',
+      );
+    }
+    return Options(headers: {'Authorization': 'Bearer $token'});
+  }
+
   Future<String?> readTokenId() => _storage.read(key: _tokenIdKey);
 
   Future<DateTime?> readExpiresAt() async {