fix(admin): match flat API response shape, no nested data envelope

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

@@ -49,13 +49,11 @@ interface OrgTreeWithUsersResponse {
 
 interface ImportUsersResponse {
   success: boolean;
-  data: {
-    teacherCount: number;
-    studentCount: number;
-    classCount: number;
-    skipped: number;
-    warnings: string[];
-  };
+  teacherCount: number;
+  studentCount: number;
+  classCount: number;
+  skipped: number;
+  warnings: string[];
 }
 
 interface ClassMarkForm {
@@ -355,8 +353,7 @@ const IntegrationConfigPage: React.FC = () => {
         users: usersPayload,
       };
 
-      const res: any = await api.post('/sync/dingtalk/import-users', payload);
-      const data = res.data;
+      const data: any = await api.post('/sync/dingtalk/import-users', payload);
       message.success(
         `导入完成：${data.teacherCount} 位老师，${data.studentCount} 位学生` +
         (data.classCount ? `，${data.classCount} 个班级` : '') +