输出消息，测试撤回

plugins/group_member_change/main.py

@@ -62,8 +62,10 @@ class GroupMemberChangePlugin(MessagePluginInterface):
 
     async def process_message(self, message: Dict[str, Any]) -> Tuple[bool, Optional[str]]:
         """处理接收到的消息"""
-
-        content = str(message.get("content", "")).strip()
+        content = message.get("content")
+        if hasattr(content, "clean_content"):
+            content = content.clean_content
+        content = str(content).strip()
         self.LOG.info(f"插件执行： {self.name}：{content}")
         if not content or "<sysmsg" not in content:
             return False, "非系统消息"