update api

lib/features/auth/data/models/auth_response_model.dart

@@ -0,0 +1,42 @@
+import '../../domain/entities/auth_response.dart';
+import 'user_model.dart';
+
+/// AuthResponse model for data layer (extends AuthResponse entity)
+class AuthResponseModel extends AuthResponse {
+  const AuthResponseModel({
+    required super.accessToken,
+    required super.user,
+  });
+
+  /// Create AuthResponseModel from JSON
+  factory AuthResponseModel.fromJson(Map<String, dynamic> json) {
+    return AuthResponseModel(
+      accessToken: json['access_token'] as String,
+      user: UserModel.fromJson(json['user'] as Map<String, dynamic>),
+    );
+  }
+
+  /// Convert AuthResponseModel to JSON
+  Map<String, dynamic> toJson() {
+    return {
+      'access_token': accessToken,
+      'user': (user as UserModel).toJson(),
+    };
+  }
+
+  /// Create AuthResponseModel from AuthResponse entity
+  factory AuthResponseModel.fromEntity(AuthResponse authResponse) {
+    return AuthResponseModel(
+      accessToken: authResponse.accessToken,
+      user: authResponse.user,
+    );
+  }
+
+  /// Convert to AuthResponse entity
+  AuthResponse toEntity() {
+    return AuthResponse(
+      accessToken: accessToken,
+      user: user,
+    );
+  }
+}