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/Deposits/index.tsx

@@ -14,6 +14,7 @@ import {
   Tabs,
   List,
   Card,
+  Empty,
 } from 'antd';
 import { PlusOutlined, DeleteOutlined, DollarOutlined, CheckOutlined } from '@ant-design/icons';
 import dayjs from 'dayjs';
@@ -75,8 +76,8 @@ const DepositsPage: React.FC = () => {
       const [d, s]: any[] = await Promise.all([api.get('/deposits'), api.get('/students')]);
       setData(d);
       setStudents(s);
-    } catch (e) {
-      console.error(e);
+    } catch (e: any) {
+      message.error(e?.message || '加载失败，请稍后重试');
     }
     setLoading(false);
   };
@@ -86,8 +87,8 @@ const DepositsPage: React.FC = () => {
     try {
       const res = await api.get<PendingRefund[]>('/deposits/pending-refunds');
       setPendingRefunds(res || []);
-    } catch (e) {
-      console.error(e);
+    } catch (e: any) {
+      message.error(e?.message || '加载待退款列表失败');
     }
     setPendingLoading(false);
   };
@@ -436,10 +437,10 @@ const DepositsPage: React.FC = () => {
                   dataSource={filteredData}
                   rowKey="id"
                   loading={loading}
+                  locale={{ emptyText: <Empty description="暂无数据" /> }}
                   scroll={{ x: 1200 }}
                   pagination={{ pageSize: 15, showTotal: (total) => `共 ${total} 条` }}
                 />
-              </>
             ),
           },
           {