fix refundTime

app/main/api/internal/queue/paySuccessNotify.go

@@ -172,7 +172,6 @@ func (l *PaySuccessNotifyUserHandler) processRefund(ctx context.Context, order *
 
 			// 更新订单状态为退款中
 			order.Status = model.OrderStatusRefunding
-			order.RefundTime = sql.NullTime{Time: time.Now(), Valid: true}
 			if _, err := l.svcCtx.OrderModel.Update(ctx, session, order); err != nil {
 				return fmt.Errorf("更新订单状态失败: %v", err)
 			}