check and fix in ui

lib/data/services/auth_service.dart

@@ -10,7 +10,7 @@ class AuthService {
     // شبیه‌سازی API Call
     await Future.delayed(const Duration(seconds: 2));
 
-    if (email == 'test@example.com' && password == 'password123') {
+    if (email == 'a' && password == 'a') {
       return {'token': 'xyz123', 'name': 'John Doe'};
     } else {
       throw Exception('Invalid credentials');