refactor(admin): 优化订单导出逻辑

- 将订单支付信息查询逻辑移至独立位置，提高代码可读性
- 增加对非空订单号的判断，避免不必要的查询
- 优化支付状态和支付方式的处理逻辑

app/admin/lists/beforehand_order/BeforehandOrderLists.php

@@ -145,7 +145,8 @@ class BeforehandOrderLists extends BaseAdminDataLists implements ListsSearchInte
                 $address = '';
                 $arrival_time = '';
                 $pay_price = '';
-                if($export==2 && $item['order_sn']!=''){
+                if($export==2){
+                    if($item['order_sn']!=''){
                         $find=StoreOrder::where('order_id',$item['order_sn'])->field('paid,pay_type,pay_price')->find();
                         if($find){
                             switch ($find['pay_type']) {
@@ -176,6 +177,7 @@ class BeforehandOrderLists extends BaseAdminDataLists implements ListsSearchInte
                                 $pay_status = '未付款';
                             }
                         }
+                    }
                     if($item['warehousing_id']>0){
                         $order_rk=WarehouseOrder::where('id',$item['warehousing_id'])->value('code');
                     }