fix(admin): UX improvements — silent fetch failures, empty states, batch loading guards, dashboard refresh

- Replace console.error-only catches with message.error user-facing notifications
  across Bills, Classes, ClassroomRentals, ClassroomSchedule, Classrooms, Deposits,
  Expenses, OperationLogs, Permissions, Roles, RoomVisual, Rooms, Students,
  Tenants, Users
- Add Empty component via Table locale prop on list pages: Bills, Classes,
  ClassroomRentals, Classrooms, Deposits, Expenses (room+personal), Occupancies,
  Rooms, Students, Tenants, Roles
- Add batchLoading state to batch delete/update operations: Bills (batchDelete,
  batchUpdateStatus), Expenses (batchDeleteRoom, batchDeletePersonal),
  Occupancies (batchCheckOut, batchDelete), Rooms (batchDelete),
  Students (batchDelete)
- Add refreshLoading indicator to Dashboard header when re-fetching data
- Consistent error pattern: catch (e: unknown) { const err = e as { message?: string }; message.error(...); }

apps/admin/src/pages/Occupancies/index.tsx

@@ -14,8 +14,8 @@ import {
   Popconfirm,
   Upload,
   Switch,
-  Alert,
   Tooltip,
+  Empty,
 } from 'antd';
 import {
   PlusOutlined,
@@ -50,6 +50,7 @@ const OccupanciesPage: React.FC = () => {
   const [batchCheckOutModal, setBatchCheckOutModal] = useState(false);
   const [selectedRowKeys, setSelectedRowKeys] = useState<number[]>([]);
   const [saving, setSaving] = useState(false);
+  const [batchLoading, setBatchLoading] = useState(false);
   const [checkInForm] = Form.useForm();
   const [checkOutForm] = Form.useForm();
   const [transferForm] = Form.useForm();
@@ -187,6 +188,7 @@ const OccupanciesPage: React.FC = () => {
 
   const handleBatchCheckOut = async () => {
     const values = await batchCheckOutForm.validateFields();
+    setBatchLoading(true);
     try {
       const res: any = await api.post('/occupancies/batch-check-out', {
         ids: selectedRowKeys,
@@ -201,10 +203,13 @@ const OccupanciesPage: React.FC = () => {
       fetchData();
     } catch (e: any) {
       message.error(e?.message || '批量退宿失败');
+    } finally {
+      setBatchLoading(false);
     }
   };
 
   const handleBatchDelete = async () => {
+    setBatchLoading(true);
     try {
       const res: any = await api.post('/occupancies/batch-delete', { ids: selectedRowKeys });
       message.success(res?.message || `已删除 ${selectedRowKeys.length} 条`);
@@ -212,6 +217,8 @@ const OccupanciesPage: React.FC = () => {
       fetchData();
     } catch (e: any) {
       message.error(e?.message || '批量删除失败');
+    } finally {
+      setBatchLoading(false);
     }
   };
 
@@ -447,6 +454,7 @@ const OccupanciesPage: React.FC = () => {
                     setBatchCheckOutModal(true);
                   }}
                   style={{ marginLeft: 12 }}
+                  loading={batchLoading}
                 >
                   批量退宿
                 </PermissionButton>
@@ -463,6 +471,7 @@ const OccupanciesPage: React.FC = () => {
                     size="small"
                     icon={<DeleteOutlined />}
                     style={{ marginLeft: 12 }}
+                    loading={batchLoading}
                   >
                     批量删除
                   </PermissionButton>
@@ -482,12 +491,11 @@ const OccupanciesPage: React.FC = () => {
         dataSource={filteredData}
         rowKey="id"
         loading={loading}
+        locale={{ emptyText: <Empty description="暂无数据" /> }}
         scroll={{ x: 1300 }}
         pagination={{ pageSize: 15, showTotal: (total) => `共 ${total} 条` }}
         rowSelection={rowSelection}
       />
-
-      {/* 入住登记弹窗 */}
       <Modal
         title="入住登记"
         open={checkInModal}