refactor(admin): 修改商品采购价为会员价

- 将商品采购价计算逻辑修改为直接使用会员价
- 注释掉原有的通过 StoreProductGroupPrice 模型计算采购价的代码
- 此修改可能影响订单总价计算和后台利润显示

app/admin/logic/beforehand_order/BeforehandOrderLogic.php

@@ -901,7 +901,7 @@ class BeforehandOrderLogic extends BaseLogic
             $v['unit_name'] = StoreProductUnit::where('id', $find['unit'])->value('name');
             $v['store_name'] = $find['store_name'];
             $v['mark'] = $find['after_sales'];
-            $v['purchase'] = StoreProductGroupPrice::where('product_id', $v['product_id'])->where('group_id', $user_ship)->value('price');
+            $v['purchase'] = $v['vip_price'];//StoreProductGroupPrice::where('product_id', $v['product_id'])->where('group_id', $user_ship)->value('price');
             if ($v['purchase']) {
                 $v['pay_price'] = bcmul($v['purchase'], $v['nums'], 2);
             } else {