refactor: unify message channel shutdown convergence

app/modules/wechatclawbot/__init__.py

@@ -69,13 +69,9 @@ class WechatClawBotModule(_MessageChannelModuleBase[WechatClawBot]):
         """
         return False
 
-    def stop(self) -> None:
-        """停止模块"""
-        for client in self.get_instances().values():
-            try:
-                client.stop()
-            except Exception as err:
-                logger.error(f"停止微信 ClawBot 模块实例失败：{err}")
+    def stop(self) -> bool:
+        """停止全部微信 ClawBot 实例，并返回资源是否全部收敛。"""
+        return self._stop_service_instances()
 
     def _test_connection(self, client) -> Tuple[bool, str]:
         """微信 ClawBot 的连接探测返回 (状态, 信息)。"""