fix(admin): 修复预售订单创建逻辑

- 修改了 VIP 价格的计算逻辑，移除了条件判断
- 更新了用户角色验证的错误提示信息
- 优化了订单创建流程中的异常处理

app/admin/logic/beforehand_order/BeforehandOrderLogic.php

@@ -411,7 +411,7 @@ class BeforehandOrderLogic extends BaseLogic
                     'admin_id' => $admin_id,
                     'total_price' => $arr['total_price'],
                     'price' => $arr['price'],
-                    'vip_price' => $price==0?$arr['price']:$price,
+                    'vip_price' => $price,
                     'purchase' => $arr['purchase'],
                     'oid' => $res['id'],
                     'code' => $res['code'],
@@ -870,10 +870,10 @@ class BeforehandOrderLogic extends BaseLogic
         if($order['uid']>0){
             $user_ship = User::where('id', $order['uid'])->value('user_ship');
             if($user_ship==0){
-                throw new BusinessException('用户id不能为0');
+                throw new BusinessException('用户角色id不能为0');
             }
         }else{
-            throw new BusinessException('用户id不能为0');
+            throw new BusinessException('该订单没选择会员用户');
         }
         $total_price = 0;
         $pay_price = 0;