refactor(WEB): 공사관리 리스트 페이지 모바일 필터 마이그레이션

- BiddingListClient: MobileFilter 컴포넌트 적용
- ContractListClient: MobileFilter 컴포넌트 적용
- EstimateListClient: MobileFilter 컴포넌트 적용
- HandoverReportListClient: MobileFilter 컴포넌트 적용
- IssueManagementListClient: MobileFilter 컴포넌트 적용
- ItemManagementClient: MobileFilter 컴포넌트 적용
- LaborManagementClient: MobileFilter 컴포넌트 적용
- PricingListClient: MobileFilter 컴포넌트 적용
- SiteBriefingListClient: MobileFilter 컴포넌트 적용
- SiteManagementListClient: MobileFilter 컴포넌트 적용
- StructureReviewListClient: MobileFilter 컴포넌트 적용
- WorkerStatusListClient: MobileFilter 컴포넌트 적용
- TodayIssueSection: CEO 대시보드 이슈 섹션 개선
- EmployeeForm: 사원등록 폼 개선

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/app/[locale]/(protected)/hr/employee-management/new/page.tsx

@@ -1,22 +1,28 @@
 'use client';
 
-import { useRouter } from 'next/navigation';
+import { useRouter, useParams } from 'next/navigation';
+import { toast } from 'sonner';
 import { EmployeeForm } from '@/components/hr/EmployeeManagement/EmployeeForm';
 import { createEmployee } from '@/components/hr/EmployeeManagement/actions';
 import type { EmployeeFormData } from '@/components/hr/EmployeeManagement/types';
 
 export default function EmployeeNewPage() {
   const router = useRouter();
+  const params = useParams();
+  const locale = params.locale as string || 'ko';
 
   const handleSave = async (data: EmployeeFormData) => {
     try {
       const result = await createEmployee(data);
       if (result.success) {
-        router.push('/ko/hr/employee-management');
+        toast.success('사원이 등록되었습니다.');
+        router.push(`/${locale}/hr/employee-management`);
       } else {
+        toast.error(result.error || '사원 등록에 실패했습니다.');
         console.error('[EmployeeNewPage] Create failed:', result.error);
       }
     } catch (error) {
+      toast.error('서버 오류가 발생했습니다.');
       console.error('[EmployeeNewPage] Create error:', error);
     }
   };