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

FinlyticApp/lib/features/auth/repositories/auth_repository.dart

@@ -67,6 +67,14 @@ class AuthRepository {
     }
   }
 
+  Future<bool> changeInitialPassword(String userId, String newPassword) async {
+    final res = await apiClient.post('/api/v1/auth/change-initial-password', data: {
+      'userId': userId,
+      'newPassword': newPassword,
+    });
+    return res.statusCode == 200;
+  }
+
   Future<void> logout() async {
     await storageService.clearAll();
   }
@@ -76,3 +84,4 @@ class RequiresPasswordChangeException implements Exception {
   final String userId;
   RequiresPasswordChangeException(this.userId);
 }
+

FinlyticApp/lib/features/auth/views/change_initial_password_screen.dart

@@ -1,8 +1,10 @@
 import 'package:flutter/material.dart';
 import 'package:flutter_bloc/flutter_bloc.dart';
 import 'package:finlytic_app/core/network/api_client.dart';
+import 'package:finlytic_app/core/services/secure_storage_service.dart';
 import 'package:finlytic_app/core/theme/app_theme.dart';
 import 'package:finlytic_app/features/auth/bloc/auth_bloc.dart';
+import 'package:finlytic_app/features/auth/repositories/auth_repository.dart';
 
 class ChangeInitialPasswordScreen extends StatefulWidget {
   final String userId;
@@ -23,13 +25,13 @@ class _ChangeInitialPasswordScreenState extends State<ChangeInitialPasswordScree
     if (_formKey.currentState?.validate() ?? false) {
       setState(() => _isLoading = true);
       try {
-        final apiClient = context.read<ApiClient>();
-        final res = await apiClient.post('/api/v1/auth/change-initial-password', data: {
-          'userId': widget.userId,
-          'newPassword': _passwordController.text,
-        });
+        final authRepo = AuthRepository(
+          apiClient: context.read<ApiClient>(),
+          storageService: context.read<SecureStorageService>(),
+        );
+        final success = await authRepo.changeInitialPassword(widget.userId, _passwordController.text);
 
-        if (res.statusCode == 200) {
+        if (success) {
           if (mounted) {
             ScaffoldMessenger.of(context).showSnackBar(
               SnackBar(content: Text('Passwort erfolgreich geändert! Bitte melden Sie sich erneut an.'), backgroundColor: AppTheme.accentCyan),