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/data/models/user/user_dto.dart

@@ -29,6 +29,7 @@ class UserDto with _$UserDto {
       name: name,
       email: email,
       phone: phone,
+      companyName: company?.name,
     );
   }
 }
@@ -120,4 +121,3 @@ class CheckUsernameResponse with _$CheckUsernameResponse {
   factory CheckUsernameResponse.fromJson(Map<String, dynamic> json) =>
       _$CheckUsernameResponseFromJson(json);
 }
-