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/Expenses/index.tsx

@@ -14,6 +14,7 @@ import {
   Tabs,
   Popconfirm,
   Upload,
+  Empty,
 } from 'antd';
 import {
   PlusOutlined,
@@ -51,6 +52,7 @@ const ExpensesPage: React.FC = () => {
   const [selectedRoomKeys, setSelectedRoomKeys] = useState<number[]>([]);
   const [selectedPersonalKeys, setSelectedPersonalKeys] = useState<number[]>([]);
   const [saving, setSaving] = useState(false);
+  const [batchLoading, setBatchLoading] = useState(false);
 
   // Dynamic expense type options from API
   const [typeOptions, setTypeOptions] = useState<{ value: string; label: string }[]>([]);
@@ -78,6 +80,7 @@ const ExpensesPage: React.FC = () => {
   }, []);
 
   const handleBatchDeleteRoom = async () => {
+    setBatchLoading(true);
     try {
       const res: any = await api.post('/expenses/room/batch-delete', { ids: selectedRoomKeys });
       message.success(res?.message || `已删除 ${selectedRoomKeys.length} 条`);
@@ -85,10 +88,13 @@ const ExpensesPage: React.FC = () => {
       fetchData();
     } catch (e: any) {
       message.error(e?.message || '批量删除失败');
+    } finally {
+      setBatchLoading(false);
     }
   };
 
   const handleBatchDeletePersonal = async () => {
+    setBatchLoading(true);
     try {
       const res: any = await api.post('/expenses/personal/batch-delete', {
         ids: selectedPersonalKeys,
@@ -98,6 +104,8 @@ const ExpensesPage: React.FC = () => {
       fetchData();
     } catch (e: any) {
       message.error(e?.message || '批量删除失败');
+    } finally {
+      setBatchLoading(false);
     }
   };
 
@@ -114,8 +122,9 @@ const ExpensesPage: React.FC = () => {
       setPersonalExpenses(pe);
       setRooms(rm);
       setStudents(st);
-    } catch (e) {
-      console.error(e);
+    } catch (e: unknown) {
+      const err = e as { message?: string };
+      message.error(err?.message || '加载失败，请稍后重试');
     }
     setLoading(false);
   }, []);
@@ -410,6 +419,7 @@ const ExpensesPage: React.FC = () => {
                         danger
                         icon={<DeleteOutlined />}
                         disabled={selectedRoomKeys.length === 0}
+                        loading={batchLoading}
                       >
                         批量删除
                       </PermissionButton>
@@ -433,6 +443,7 @@ const ExpensesPage: React.FC = () => {
                   dataSource={filteredRoomExpenses}
                   rowKey="id"
                   loading={loading}
+                  locale={{ emptyText: <Empty description="暂无数据" /> }}
                   scroll={{ x: 1200 }}
                   pagination={{ pageSize: 15, showTotal: (total) => `共 ${total} 条` }}
                   rowSelection={{
@@ -440,7 +451,6 @@ const ExpensesPage: React.FC = () => {
                     onChange: (keys) => setSelectedRoomKeys(keys as number[]),
                   }}
                 />
-              </>
             ),
           },
           {
@@ -532,6 +542,7 @@ const ExpensesPage: React.FC = () => {
                         danger
                         icon={<DeleteOutlined />}
                         disabled={selectedPersonalKeys.length === 0}
+                        loading={batchLoading}
                       >
                         批量删除
                       </PermissionButton>
@@ -549,12 +560,12 @@ const ExpensesPage: React.FC = () => {
                       录入个人费用
                     </PermissionButton>
                   </Space>
-                </div>
                 <Table
                   columns={personalColumns}
                   dataSource={filteredPersonalExpenses}
                   rowKey="id"
                   loading={loading}
+                  locale={{ emptyText: <Empty description="暂无数据" /> }}
                   scroll={{ x: 1200 }}
                   pagination={{ pageSize: 15, showTotal: (total) => `共 ${total} 条` }}
                   rowSelection={{