fix(admin): 修复仓库产品入库价格为零的问题

- 在计算总价时，增加对商品采购价的判断
- 如果采购价小于等于零，则将总价设置为零
- 否则，按照原逻辑计算总价

app/admin/logic/warehouse_product/WarehouseProductLogic.php

@@ -62,7 +62,11 @@ class WarehouseProductLogic extends BaseLogic
                     if (!$storeProduct) {
                         throw new BusinessException('商品不存在');
                     }
-                    $total_price = bcmul($after_nums, $storeProduct['purchase'], 2);
+                    if($storeProduct['purchase']<=0){
+                        $total_price=0;
+                    }else{
+                        $total_price = bcmul($after_nums, $storeProduct['purchase'], 2);
+                    }
                     $data = [
                         'warehouse_id' => $params['warehouse_id'],
                         'product_id' => $params['product_id'],