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);
 }
+