feat(app): clean architecture with typed repositories, DTO models and calendar event logos

FinlyticApp/lib/features/admin/repositories/admin_repository.dart

@@ -2,11 +2,12 @@ import 'package:finlytic_app/core/network/api_client.dart';
 import 'package:finlytic_app/features/admin/models/admin_user_model.dart';
 import 'package:finlytic_app/features/admin/models/admin_create_user_request_dto.dart';
 import 'package:finlytic_app/features/admin/models/admin_update_user_request_dto.dart';
+import 'package:finlytic_app/features/admin/models/service_setting_dto.dart';
 
 class AdminRepository {
   final ApiClient apiClient;
 
-  AdminRepository({required this.apiClient});
+  const AdminRepository({required this.apiClient});
 
   Future<List<AdminUserModel>> fetchUsers() async {
     try {
@@ -17,8 +18,7 @@ class AdminRepository {
       }
       return [];
     } catch (e) {
-      print('Error fetching admin users: $e');
-      throw Exception('Nutzer konnten nicht geladen werden');
+      throw Exception('Nutzer konnten nicht geladen werden: $e');
     }
   }
 
@@ -35,4 +35,29 @@ class AdminRepository {
       throw Exception('Aktualisieren fehlgeschlagen');
     }
   }
+
+  Future<Map<String, List<ServiceSettingDto>>> fetchSettings() async {
+    final res = await apiClient.get('/api/v1/admin/settings');
+    if (res.statusCode == 200 && res.data != null && res.data is Map<String, dynamic>) {
+      final map = res.data as Map<String, dynamic>;
+      final result = <String, List<ServiceSettingDto>>{};
+      map.forEach((k, v) {
+        if (v is List) {
+          result[k] = v
+              .whereType<Map<String, dynamic>>()
+              .map((item) => ServiceSettingDto.fromJson(item))
+              .toList();
+        }
+      });
+      return result;
+    }
+    return {};
+  }
+
+  Future<void> updateServiceSettings(String serviceName, Map<String, String> settings) async {
+    final res = await apiClient.put('/api/v1/admin/settings/$serviceName', data: settings);
+    if (res.statusCode != 200 && res.statusCode != 204) {
+      throw Exception('Einstellungen konnten nicht gespeichert werden');
+    }
+  }
 }