결재 API 계약 보완 및 테스트 정리

lib/features/auth/data/repositories/auth_repository_remote.dart

@@ -0,0 +1,43 @@
+import 'package:dio/dio.dart';
+
+import '../../../../core/network/api_client.dart';
+import '../../../../core/network/api_routes.dart';
+import '../../domain/entities/auth_session.dart';
+import '../../domain/entities/login_request.dart';
+import '../../domain/repositories/auth_repository.dart';
+import '../dtos/auth_session_dto.dart';
+
+/// 인증 관련 엔드포인트를 호출하는 원격 저장소 구현체.
+class AuthRepositoryRemote implements AuthRepository {
+  AuthRepositoryRemote({required ApiClient apiClient}) : _api = apiClient;
+
+  final ApiClient _api;
+
+  static const _basePath = '${ApiRoutes.apiV1}/auth';
+
+  @override
+  Future<AuthSession> login(LoginRequest request) async {
+    final response = await _api.post<Map<String, dynamic>>(
+      '$_basePath/login',
+      data: {
+        'identifier': request.identifier,
+        'password': request.password,
+        'remember_me': request.rememberMe,
+      },
+      options: Options(responseType: ResponseType.json),
+    );
+    final json = (response.data?['data'] as Map<String, dynamic>?) ?? {};
+    return AuthSessionDto.fromJson(json).toEntity();
+  }
+
+  @override
+  Future<AuthSession> refresh(String refreshToken) async {
+    final response = await _api.post<Map<String, dynamic>>(
+      '$_basePath/refresh',
+      data: {'refresh_token': refreshToken},
+      options: Options(responseType: ResponseType.json),
+    );
+    final json = (response.data?['data'] as Map<String, dynamic>?) ?? {};
+    return AuthSessionDto.fromJson(json).toEntity();
+  }
+}