web: migrate health notifications to js_interop; add browser hook

- Replace dart:js with package:js in health_check_service_web.dart\n- Implement showHealthCheckNotification in web/index.html\n- Pin js dependency to ^0.6.7 for flutter_secure_storage_web compatibility

auth: harden AuthInterceptor + tests

- Allow overrideAuthRepository injection for testing\n- Normalize imports to package: paths\n- Add unit test covering token attach, 401→refresh→retry, and failure path\n- Add integration test skeleton gated by env vars

ui/data: map User.companyName to list column

- Add companyName to domain User\n- Map UserDto.company?.name\n- Render companyName in user_list

cleanup: remove legacy equipment table + unused code; minor warnings

- Remove _buildFlexibleTable and unused helpers\n- Remove unused zipcode details and cache retry constant\n- Fix null-aware and non-null assertions\n- Address child-last warnings in administrator dialog

docs: update AGENTS.md session context

lib/domain/usecases/company/update_parent_company_usecase.dart

@@ -2,7 +2,7 @@ import 'package:dartz/dartz.dart';
 import '../../../core/errors/failures.dart';
 import '../../../core/utils/hierarchy_validator.dart';
 import '../../../models/company_model.dart';
-import '../../../services/company_service.dart';
+import '../../repositories/company_repository.dart';
 import '../base_usecase.dart';
 import '../../../data/models/company/company_dto.dart';
 
@@ -19,21 +19,19 @@ class UpdateParentCompanyParams {
 
 /// 부모 회사 변경 UseCase
 class UpdateParentCompanyUseCase extends UseCase<Company, UpdateParentCompanyParams> {
-  final CompanyService _companyService;
+  // 레포지토리 기반으로 마이그레이션
+  final CompanyRepository _companyRepository;
 
-  UpdateParentCompanyUseCase(this._companyService);
+  UpdateParentCompanyUseCase(this._companyRepository);
 
   @override
   Future<Either<Failure, Company>> call(UpdateParentCompanyParams params) async {
     try {
       // 1. 모든 회사 조회 (검증용)
-      final response = await _companyService.getCompanies(
-        page: 1,
-        perPage: 1000,
-      );
+      final allCompaniesEither = await _companyRepository.getCompanyHierarchy(includeInactive: true);
       
       // CompanyDto 리스트로 변환 (검증용)
-      final companyResponses = response.items.map((company) => CompanyDto(
+      final companyResponses = allCompaniesEither.getOrElse(() => <Company>[]).map((company) => CompanyDto(
         id: company.id ?? 0,
         name: company.name,
         address: company.address.toString(),
@@ -83,18 +81,12 @@ class UpdateParentCompanyUseCase extends UseCase<Company, UpdateParentCompanyPar
         ));
       }
       
-      // 5. 현재 회사 정보 조회
-      final currentCompany = await _companyService.getCompanyDetail(params.companyId);
-      
-      // 6. 부모 회사 ID만 변경
-      final updatedCompany = currentCompany.copyWith(
-        parentCompanyId: params.newParentId,
+      // 5~7. 레포지토리 메서드로 부모 변경 수행
+      final updateEither = await _companyRepository.updateParentCompany(
+        params.companyId,
+        params.newParentId,
       );
-      
-      // 7. 업데이트 실행
-      final result = await _companyService.updateCompany(params.companyId, updatedCompany);
-      
-      return Right(result);
+      return updateEither;
     } on ServerFailure catch (e) {
       return Left(ServerFailure(
         message: e.message,
@@ -107,4 +99,4 @@ class UpdateParentCompanyUseCase extends UseCase<Company, UpdateParentCompanyPar
       ));
     }
   }
-}
+}