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/Departments/index.tsx

@@ -82,6 +82,7 @@ const DepartmentsPage: React.FC = () => {
   const [modalOpen, setModalOpen] = useState(false);
   const [editing, setEditing] = useState<DepartmentItem | null>(null);
   const [form] = Form.useForm();
+  const [saving, setSaving] = useState(false);
 
   const fetchTree = useCallback(async () => {
     setTreeLoading(true);
@@ -160,6 +161,7 @@ const DepartmentsPage: React.FC = () => {
   }, [selectedDept, form]);
 
   const handleSubmit = useCallback(async () => {
+    setSaving(true);
     try {
       const values = await form.validateFields();
       const payload = {
@@ -180,8 +182,18 @@ const DepartmentsPage: React.FC = () => {
       if (editing && selectedId) {
         fetchDetail(editing.id);
       }
-    } catch {
-      // form validation error: do nothing
+    } catch (err: unknown) {
+      if (
+        err &&
+        typeof err === 'object' &&
+        'message' in err &&
+        typeof (err as { message: string }).message === 'string'
+      ) {
+        message.error((err as { message: string }).message);
+      }
+      // form validation error falls through silently
+    } finally {
+      setSaving(false);
     }
   }, [editing, fetchTree, fetchDetail, selectedId, form]);
 
@@ -367,6 +379,7 @@ const DepartmentsPage: React.FC = () => {
         onOk={handleSubmit}
         onCancel={() => setModalOpen(false)}
         destroyOnHidden
+        confirmLoading={saving}
       >
         <Form form={form} layout="vertical">
           <Form.Item