Merge branch 'rag/4.0' into debug

utils/ws/session_manager.go

@@ -167,9 +167,9 @@ func (manager *ConnectionManager) HandleMessage(userID int, sessionID string, me
 			// 发送消息到 WebSocket
 			_ = session.Conn.WriteMessage(websocket.TextMessage, []byte(content))
 		case chanErr, ok := <-errChan:
-			if !ok {
+			if !ok && session.LLMStatus != -1 {
 				err = errors.New("未知的错误异常")
-			} else {
+			} else if chanErr != nil {
 				err = errors.New(chanErr.Error())
 			}
 			// 标记llm提问状态：未提问