fix: harden DingTalk student synchronization

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

@@ -65,6 +65,7 @@ interface ClassItem {
 interface ImportResult {
   imported: number;
   skipped: number;
+  conflicts: number;
 }
 
 interface DingTalkAttendanceGroup {
@@ -285,7 +286,11 @@ const IntegrationConfigPage: React.FC = () => {
     setImporting(true);
     try {
       const res = await api.post<ImportResult>(`/classes/${selectedClassId}/students/import`, { users });
-      message.success(`导入 ${res.imported} 人，跳过 ${res.skipped} 人`);
+      if (res.conflicts > 0) {
+        message.warning(`导入 ${res.imported} 人，跳过 ${res.skipped} 人，${res.conflicts} 人需人工绑定`);
+      } else {
+        message.success(`导入 ${res.imported} 人，跳过 ${res.skipped} 人`);
+      }
       setCheckedKeys([]);
       setSelectedClassId(null);
     } catch (e: unknown) {