feat: 增强员工管理与报销单全流程功能

- 新增员工Excel导入服务(employee_spreadsheet)及导入/导出API端点
- 员工服务增加批量创建、邮箱唯一校验、组织架构关联等能力
- 报销单提交补充身份回填、部门信息透传及预审结果展示优化
- 认证流程增加部门信息(departmentName)并在schema中同步扩展
- 用户Agent服务增加部门关联与报销单回填逻辑
- 前端员工管理页面全面重构，新增导入导出、搜索过滤、分页等功能
- 前端审批中心、审计、差旅报销等视图交互与样式优化
- 新增TableLoadingState共享组件及员工导入测试用例

web/src/services/employees.js

@@ -1,6 +1,6 @@
 import { apiRequest } from './api.js'
 
-export function fetchEmployees(params = {}) {
+function buildEmployeesQuery(params = {}) {
   const search = new URLSearchParams()
 
   if (params.status && params.status !== '全部员工') {
@@ -11,10 +11,54 @@ export function fetchEmployees(params = {}) {
     search.set('keyword', params.keyword)
   }
 
-  const query = search.toString()
+  return search
+}
+
+export function fetchEmployees(params = {}) {
+  const query = buildEmployeesQuery(params).toString()
   return apiRequest(`/employees${query ? `?${query}` : ''}`)
 }
 
+function triggerBlobDownload(blob, filename) {
+  const objectUrl = URL.createObjectURL(blob)
+  const anchor = document.createElement('a')
+  anchor.href = objectUrl
+  anchor.download = filename
+  anchor.rel = 'noopener'
+  document.body.appendChild(anchor)
+  anchor.click()
+  anchor.remove()
+  URL.revokeObjectURL(objectUrl)
+}
+
+export async function downloadEmployeeImportTemplate() {
+  const blob = await apiRequest('/employees/import-template', {
+    responseType: 'blob',
+    contentType: null
+  })
+  triggerBlobDownload(blob, '员工导入模板.xlsx')
+}
+
+export async function exportEmployees(params = {}) {
+  const query = buildEmployeesQuery(params).toString()
+  const blob = await apiRequest(`/employees/export${query ? `?${query}` : ''}`, {
+    responseType: 'blob',
+    contentType: null
+  })
+  triggerBlobDownload(blob, '员工目录导出.xlsx')
+}
+
+export function importEmployees(file) {
+  const formData = new FormData()
+  formData.append('file', file)
+
+  return apiRequest('/employees/import', {
+    method: 'POST',
+    body: formData,
+    contentType: null
+  })
+}
+
 export function fetchEmployeeMeta() {
   return apiRequest('/employees/meta')
 }

web/src/services/reimbursements.js

@@ -87,6 +87,13 @@ export function submitExpenseClaim(claimId) {
   })
 }
 
+export function returnExpenseClaim(claimId, payload = {}) {
+  return apiRequest(`/reimbursements/claims/${encodeURIComponent(String(claimId || '').trim())}/return`, {
+    method: 'POST',
+    body: JSON.stringify(payload)
+  })
+}
+
 export function deleteExpenseClaim(claimId) {
   return apiRequest(`/reimbursements/claims/${encodeURIComponent(String(claimId || '').trim())}`, {
     method: 'DELETE'