feat(mobile-next): 工号查询防抖、开关接入，资料页不再把工号当手机号

Co-authored-by: Cursor <cursoragent@cursor.com>
Co-authored-by: multica-agent <github@multica.ai>

mobile-next/lib/company/ui/add_colleague_page.dart

@@ -1,3 +1,5 @@
+import 'dart:async';
+
 import 'package:flutter/material.dart';
 import 'package:flutter_openim_sdk/flutter_openim_sdk.dart';
 import 'package:get/get.dart';
@@ -18,6 +20,7 @@ class AddColleagueLogic extends GetxController {
   final loadFailed = false.obs;
 
   final _directory = DirectoryApi();
+  Timer? _lookupDebounce;
 
   @override
   void onReady() {
@@ -27,11 +30,18 @@ class AddColleagueLogic extends GetxController {
 
   @override
   void onClose() {
+    _lookupDebounce?.cancel();
     staffCtrl.dispose();
     msgCtrl.dispose();
     super.onClose();
   }
 
+  void onStaffChanged(String _) {
+    staffError.value = null;
+    _lookupDebounce?.cancel();
+    _lookupDebounce = Timer(const Duration(milliseconds: 300), lookupDirectory);
+  }
+
   Future<void> reload() async {
     loading.value = true;
     loadFailed.value = false;
@@ -98,7 +108,7 @@ class AddColleaguePage extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    final logic = Get.put(AddColleagueLogic());
+    final logic = Get.find<AddColleagueLogic>();
     return Scaffold(
       backgroundColor: AppColors.pageBg,
       appBar: AppBar(
@@ -125,10 +135,7 @@ class AddColleaguePage extends StatelessWidget {
                 height: 48,
                 error: logic.staffError.value,
                 enabled: !logic.sending.value,
-                onChanged: (_) {
-                  logic.staffError.value = null;
-                  logic.lookupDirectory();
-                },
+                onChanged: logic.onStaffChanged,
               ),
               Obx(() {
                 final hint = logic.directoryHint.value;