test: 통합 테스트 오류 및 경고 수정

- 모든 서비스 메서드 시그니처를 실제 구현에 맞게 수정
- TestDataGenerator 제거하고 직접 객체 생성으로 변경
- 모델 필드명 및 타입 불일치 수정
- 불필요한 Either 패턴 사용 제거
- null safety 관련 이슈 해결

수정된 파일:
- test/integration/screens/company_integration_test.dart
- test/integration/screens/equipment_integration_test.dart
- test/integration/screens/user_integration_test.dart
- test/integration/screens/login_integration_test.dart

test/integration/automated/run_company_test.dart

@@ -0,0 +1,56 @@
+import 'package:flutter_test/flutter_test.dart';
+import 'package:get_it/get_it.dart';
+import 'company_automated_test.dart';
+import 'framework/core/api_error_diagnostics.dart';
+import 'framework/core/auto_fixer.dart';
+import 'framework/core/test_data_generator.dart';
+import 'framework/infrastructure/test_context.dart';
+import 'framework/infrastructure/report_collector.dart';
+import '../real_api/test_helper.dart';
+
+void main() {
+  group('Company Automated Test', () {
+    late GetIt getIt;
+    late CompanyAutomatedTest companyTest;
+
+    setUpAll(() async {
+      await RealApiTestHelper.setupTestEnvironment();
+      await RealApiTestHelper.loginAndGetToken();
+      getIt = GetIt.instance;
+    });
+
+    tearDownAll(() async {
+      await RealApiTestHelper.teardownTestEnvironment();
+    });
+
+    test('회사 관리 전체 자동화 테스트', () async {
+      final testContext = TestContext();
+      final errorDiagnostics = ApiErrorDiagnostics();
+      final autoFixer = ApiAutoFixer();
+      final dataGenerator = TestDataGenerator();
+      final reportCollector = ReportCollector();
+
+      companyTest = CompanyAutomatedTest(
+        apiClient: getIt.get(),
+        getIt: getIt,
+        testContext: testContext,
+        errorDiagnostics: errorDiagnostics,
+        autoFixer: autoFixer,
+        dataGenerator: dataGenerator,
+        reportCollector: reportCollector,
+      );
+
+      await companyTest.initializeServices();
+      
+      final metadata = companyTest.getScreenMetadata();
+      final features = await companyTest.detectFeatures(metadata);
+      final customFeatures = await companyTest.detectCustomFeatures(metadata);
+      features.addAll(customFeatures);
+      
+      final result = await companyTest.executeTests(features);
+      
+      expect(result.failedTests, equals(0), 
+        reason: '${result.failedTests}개의 테스트가 실패했습니다');
+    }, timeout: Timeout(Duration(minutes: 10)));
+  });
+}