feat(shop): 优化VIP价格支持及线下付款兼容

- 结算页新增线下付款异常友好提示，避免支付配置中appid缺失错误
- 后端修复支付类型判断，防止线下付款仍试图创建微信支付订单
- 结算页默认支付方式调整为线下付款，货到付款选项注释
- 新增门店订单“修改金额”功能，支持弹窗输入新金额和修改原因
- 订单修改支持追加操作记录，接口复用updateShopOrder，无需新接口
- 重构多处页面和组件，使用响应式useVipStatus替代同步isVipMember缓存
- 新增OrderGoodsItem.price字段，下单时传VIP dealerPrice确保价格准确
- 购物车、商品详情、分类页、SkuSelector、商品卡片等支持动态VIP价格展示
- 修改购物车上下文calcPrice函数，响应VIP状态变更自动更新价格显示
- 提升前端VIP状态管理一致性，防止过期缓存导致VIP特权价格显示异常
- 验证构建通过，后端服务重启后生效线下付款修复和订单修改功能

src/pages/shop/index.tsx

@@ -7,7 +7,7 @@ import { useCartContext } from '@/contexts/CartContext'
 import type { ShopGoodsCategory } from '@/api/shop/shopGoodsCategory/model'
 import type { ShopGoods, ShopGoodsParam } from '@/api/shop/shopGoods/model'
 import { isGuest } from '@/utils/auth'
-import { isVipMember } from '@/utils/vip'
+import { useVipStatus } from '@/hooks/useVipStatus'
 import { getCompressedImageUrl } from '@/utils/image'
 import { requireLogin } from '@/utils/login-guard'
 import { useShare } from '@/hooks/useShare'
@@ -38,6 +38,8 @@ const SORT_TABS: { key: SortKey; label: string }[] = [
 
 const ShopPage: React.FC = () => {
   const { addItem, totalCount } = useCartContext()
+  // VIP 状态：异步校验并更新缓存，isVip 变化时触发重渲染
+  const { isVip } = useVipStatus()
   const [categoryList, setCategoryList] = useState<any[]>(PRESET_CATEGORIES)
   const [activeCategory, setActiveCategory] = useState(0)
 
@@ -140,7 +142,7 @@ const ShopPage: React.FC = () => {
 
   /** 获取显示价格 */
   const getDisplayPrice = (product: ShopGoods) => {
-    if (isVipMember() && product.dealerPrice) return product.dealerPrice
+    if (isVip && product.dealerPrice) return product.dealerPrice
     return product.price || '0'
   }
 
@@ -304,7 +306,7 @@ const ShopPage: React.FC = () => {
                             <Price
                               price={getDisplayPrice(item)}
                               original={
-                                isVipMember() && item.dealerPrice
+                                isVip && item.dealerPrice
                                   ? item.price
                                   : item.salePrice && item.salePrice !== item.price
                                     ? item.salePrice