fix: 智能体唤醒后消息发送问题

app/agent/__init__.py

@@ -384,12 +384,16 @@ class MoviePilotAgent:
         """
         通过原渠道发送消息给用户
         """
+        user_id = self.user_id
+        if self.user_id == "system":
+            user_id = None
+
         await AgentChain().async_post_message(
             Notification(
                 channel=self.channel,
                 source=self.source,
                 mtype=NotificationType.Agent,
-                userid=self.user_id,
+                userid=user_id,
                 username=self.username,
                 title=title,
                 text=message,
@@ -632,7 +636,7 @@ class AgentManager:
         try:
             # 每次使用唯一的 session_id，避免共享上下文
             session_id = f"__agent_heartbeat_{uuid.uuid4().hex[:12]}__"
-            user_id = settings.SUPERUSER
+            user_id = "system"
 
             logger.info("智能体心跳唤醒：开始检查待处理任务...")