fix(admin): 修复员工会话列表归档筛选功能

- 修改 loadData 函数，新增 archiveFilter 参数以控制归档筛选
- 调整请求参数，使用 archiveFilter 替代原 hasArchive 状态
- 更新 handleFilterChange，确保筛选值同步传递给 loadData
- 保持分页逻辑不变，增强归档筛选的灵活性和准确性

frontend/admin/src/pages/StaffSessionList.tsx

@@ -42,11 +42,11 @@ export default function StaffSessionList() {
   const [chatVisible, setChatVisible] = useState(false)
   const [selectedSession, setSelectedSession] = useState<SessionVO | null>(null)
 
-  const loadData = async (page = 1, pageSize = 20) => {
+  const loadData = async (page = 1, pageSize = 20, archiveFilter = hasArchive) => {
     setLoading(true)
     try {
       const res: any = await request.get('/v1/archive/staffs', {
-        params: { page, size: pageSize, keyword: keyword || undefined, hasArchive }
+        params: { page, size: pageSize, keyword: keyword || undefined, hasArchive: archiveFilter }
       })
       setData(res.data.list || [])
       setPagination({
@@ -81,7 +81,7 @@ export default function StaffSessionList() {
 
   const handleFilterChange = (value: boolean) => {
     setHasArchive(value)
-    loadData(1, pagination.pageSize)
+    loadData(1, pagination.pageSize, value)
   }
 
   const handleTableChange = (newPagination: any) => {