#972 微信Bot多轮对话修复 - sendmessage补client_id+run_id

对齐openclaw: payload补client_id(随机uuid去重)+run_id+from_user_id。缺失client_id导致多轮对话第二轮消息被iLink误判重复丢弃(第一轮成功第二轮失败)。

backend/python/app/api/im_bot_user.py

@@ -18,6 +18,7 @@ import os
 import random
 import threading
 import time
+import uuid
 from datetime import datetime, timedelta, timezone
 from typing import Optional
 from urllib.parse import quote as _quote
@@ -208,11 +209,14 @@ def _wechat_post_msg(baseurl: str, bot_token: str, to_user_id: str, context_toke
     ret=-14=会话过期需重扫；ret=-2=token 失效。"""
     payload = {
         "msg": {
+            "from_user_id": "",
             "to_user_id": to_user_id,
+            "client_id": uuid.uuid4().hex,
             "message_type": 2,
             "message_state": 2,
             "context_token": context_token,
             "item_list": item_list,
+            "run_id": uuid.uuid4().hex,
         }
     }
     last_body = {}