feat(BeforehandOrderCartInfoLogic): 添加订单备注功能

- 在创建预订单购物车信息时，增加了备注字段的保存
- 使用空字符串作为备注的默认值，确保字段始终有值

app/admin/logic/beforehand_order_cart_info/BeforehandOrderCartInfoLogic.php

@@ -113,6 +113,7 @@ class BeforehandOrderCartInfoLogic extends BaseLogic
                 'pay_price' => $total_price,
                 'cart_num' => $params['nums'],
                 'accept_num' => $params['nums'],
+                'mark' => $params['mark']??'',
             ]);
             $bhoid = $params['bhoid'];
             $info = BeforehandOrderCartInfo::where('bhoid', $bhoid)->field('sum(cart_num) as cart_num,sum(total_price) as total_price,sum(pay_price) as pay_price')->find();