feat: DingTalk attendance import + integration config + expense types + UI polish

Server:
- Add DingTalk attendance import service with SSE progress streaming
- Add IntegrationConfig entity & module for multi-tenant DingTalk setup
- Add ExpenseType entity & ExpenseTypesModule
- Add SeedModule for DB initialization
- Add UserDingMapping entity for DingTalk user linkage
- Attendance service: import flow with dedup & student auto-mapping
- Rooms service: time-range overlap queries
- Sync controller/service: DingTalk integration wiring
- Permission guard: refactor to pure re-export
- Campus scope middleware: tenant-aware filtering

Admin UI:
- Attendance page: import UI with progress & result summary
- All pages: tableStyle/tablePagination standardization
- Login page: responsive styling
- Sensitive data: useViewSensitive hook for masked viewing
- Vite config: path aliases, build optimization
- Test infra: vitest config, test utilities

Docs: PRD DingTalk batch 1 & 2 design docs

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

@@ -75,6 +75,7 @@ const ClassesPage: React.FC = () => {
   const [filterStatus, setFilterStatus] = useState<string>();
   const [filterType, setFilterType] = useState<string>();
   const [form] = Form.useForm<ClassFormValues>();
+  const [saving, setSaving] = useState(false);
 
   const fetchData = useCallback(async () => {
     setLoading(true);
@@ -119,6 +120,7 @@ const ClassesPage: React.FC = () => {
   };
 
   const handleSubmit = async () => {
+    setSaving(true);
     try {
       const values = await form.validateFields();
       const payload = {
@@ -137,6 +139,8 @@ const ClassesPage: React.FC = () => {
       fetchData();
     } catch (e: any) {
       message.error(e?.message || '操作失败');
+    } finally {
+      setSaving(false);
     }
   };
 
@@ -150,7 +154,7 @@ const ClassesPage: React.FC = () => {
     }
   };
 
-  const columns: ColumnsType<ClassItem> = [
+  const columns: ColumnsType<ClassItem> = useMemo(() => [
     {
       title: '班级名称', dataIndex: 'name', width: 120,
       sorter: (a, b) => a.name.localeCompare(b.name),
@@ -193,7 +197,7 @@ const ClassesPage: React.FC = () => {
         </Space>
       ),
     },
-  ];
+  ], []);
 
   return (
     <Card>
@@ -239,6 +243,7 @@ const ClassesPage: React.FC = () => {
         open={modalOpen}
         onOk={handleSubmit}
         onCancel={() => setModalOpen(false)}
+        confirmLoading={saving}
         width={600}
       >
         <Form form={form} layout="vertical">