fix(chat): avoid idle runtime notice injection

server/chat.py

@@ -54,7 +54,7 @@ def _dispatch_runtime_mode_notice(terminal: WebTerminal, username: str, text: st
     if not notice:
         return
 
-    # 若有运行任务，优先入队到该任务（下一轮工具后注入），确保会进入后续 API 请求上下文。
+    # 仅在“有运行中的任务”时注入 [系统通知|notify]，空闲期切换不写入 user 消息。
     try:
         from .tasks import task_manager
 
@@ -64,39 +64,21 @@ def _dispatch_runtime_mode_notice(terminal: WebTerminal, username: str, text: st
         ]
         if current_conv:
             running_tasks.sort(key=lambda r: 0 if r.conversation_id == current_conv else 1)
-        if running_tasks:
-            target = running_tasks[0]
-            result = task_manager.enqueue_runtime_guidance(
-                username=username,
-                task_id=target.task_id,
-                message=notice,
-                source="notify",
-            )
-            if result.get("success"):
-                return
-    except Exception:
-        pass
+        if not running_tasks:
+            debug_log(f"[RuntimeMode] idle switch ignored notify injection: {notice}")
+            return
 
-    # 无运行任务时，直接写入当前会话并广播前端显示（来源固定为 notify）。
-    from .chat_flow_task_support import inject_runtime_user_message
-
-    conversation_id = getattr(getattr(terminal, "context_manager", None), "current_conversation_id", None)
-
-    def _emit(event: str, payload: Dict[str, Any]) -> None:
-        try:
-            socketio.emit(event, payload, room=f"user_{username}")
-        except Exception:
-            pass
-
-    inject_runtime_user_message(
-        web_terminal=terminal,
-        messages=None,
-        text=notice,
-        source="notify",
-        sender=_emit,
-        conversation_id=conversation_id,
-        inline=True,
-    )
+        target = running_tasks[0]
+        result = task_manager.enqueue_runtime_guidance(
+            username=username,
+            task_id=target.task_id,
+            message=notice,
+            source="notify",
+        )
+        if not result.get("success"):
+            debug_log(f"[RuntimeMode] enqueue runtime guidance failed: {result}")
+    except Exception as exc:
+        debug_log(f"[RuntimeMode] dispatch notice failed: {exc}")
 
 @chat_bp.route('/api/thinking-mode', methods=['POST'])
 @api_login_required