fix(express): 修正虚拟发货类型字段显示

- 将快递名称下拉选项改为虚拟发货类型
- 更新delivery_name字段的标签描述
- 保持次卡兑换码选项配置不变
- 确保delivery_id输入框仍为必填项

app/common/repositories/store/shipping/ExpressRepository.php

@@ -164,7 +164,7 @@ class ExpressRepository extends BaseRepository
                     [
                         'value' => 3,
                         'rule'=> [
-                            Elm::select('delivery_name', '快递名称')->options([
+                            Elm::select('delivery_name', '虚拟发货类型')->options([
                                 ['label' => '次卡兑换码', 'value' => 1],
                             ]),
                             Elm::input('delivery_id', '兑换码')->required(),