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/get_company_hierarchy_usecase.dart

@@ -2,7 +2,7 @@ import 'package:dartz/dartz.dart';
 import '../../../core/errors/failures.dart';
 import '../../../domain/entities/company_hierarchy.dart';
 import '../../../models/company_model.dart';
-import '../../../services/company_service.dart';
+import '../../repositories/company_repository.dart';
 import '../base_usecase.dart';
 
 /// 회사 계층 구조 조회 파라미터
@@ -16,22 +16,23 @@ class GetCompanyHierarchyParams {
 
 /// 회사 계층 구조 조회 UseCase
 class GetCompanyHierarchyUseCase extends UseCase<CompanyHierarchy, GetCompanyHierarchyParams> {
-  final CompanyService _companyService;
+  // 레포지토리 기반으로 마이그레이션
+  final CompanyRepository _companyRepository;
 
-  GetCompanyHierarchyUseCase(this._companyService);
+  GetCompanyHierarchyUseCase(this._companyRepository);
 
   @override
   Future<Either<Failure, CompanyHierarchy>> call(GetCompanyHierarchyParams params) async {
     try {
-      // 모든 회사 조회
-      final response = await _companyService.getCompanies(
-        page: 1,
-        perPage: 1000,
+      // 레포지토리에서 전체 회사(계층 구성용) 조회
+      final companiesEither = await _companyRepository.getCompanyHierarchy(
         includeInactive: params.includeInactive,
       );
       
-      // 계층 구조로 변환
-      final hierarchy = _buildHierarchy(response.items);
+      final hierarchy = companiesEither.fold(
+        (failure) => throw failure,
+        (companies) => _buildHierarchy(companies),
+      );
       
       return Right(hierarchy);
     } on ServerFailure catch (e) {
@@ -125,4 +126,4 @@ class GetCompanyHierarchyUseCase extends UseCase<CompanyHierarchy, GetCompanyHie
     
     return count;
   }
-}
+}