添加 刷新通讯录功能，用于解决冗余数据问题。

admin/dashboard/blueprints/contacts.py

@@ -1,3 +1,5 @@
+import asyncio
+
 from flask import Blueprint, render_template, jsonify, request, current_app
 from .auth import login_required
 from loguru import logger
@@ -173,7 +175,7 @@ def api_contacts_update():
     try:
         server = current_app.dashboard_server
         # 假设 contact_manager 有 update_contacts 方法用于同步通讯录
-        result = server.robot.refresh_contacts_db()
+        result = asyncio.run(server.robot.refresh_contacts_db())
         if result:
             return jsonify({"success": True, "message": "通讯录更新成功"})
         else: