摸大红支持购物车多选一起结账

下单支持多商品行快照与一次支付；支付后整单复制文案，前台提供购物车加购与结账。

frontend/src/features/mohong/api/mohong.ts

@@ -34,6 +34,18 @@ export interface MohongProduct {
   updated_at: string
 }
 
+export interface MohongOrderItem {
+  product_id: number
+  title: string
+  cover_url: string
+  unit: string
+  quantity: number
+  unit_price_cent: number
+  unit_price: string
+  amount_cent: number
+  amount: string
+}
+
 export interface MohongOrder {
   id: number
   order_no: string
@@ -48,6 +60,7 @@ export interface MohongOrder {
   product_title: string
   product_cover_url: string
   product_unit: string
+  items?: MohongOrderItem[]
   qrcode_url_snapshot: string
   copy_text: string
   buyer_nickname?: string
@@ -61,6 +74,11 @@ export interface MohongOrder {
   updated_at: string
 }
 
+export interface MohongCheckoutItem {
+  product_id: number
+  quantity: number
+}
+
 export interface MohongConfig {
   default_qrcode_url: string
   order_copy_template: string
@@ -95,11 +113,15 @@ export async function fetchMohongProduct(id: number | string) {
   return data.data
 }
 
-export async function createMohongOrder(productId: number, quantity: number) {
-  const { data } = await apiClient.post<ApiResponse<MohongOrder>>('/mohong/orders', {
-    product_id: productId,
-    quantity,
-  })
+/** 单商品或购物车多商品结账 */
+export async function createMohongOrder(
+  productIdOrItems: number | MohongCheckoutItem[],
+  quantity = 1
+) {
+  const payload = Array.isArray(productIdOrItems)
+    ? { items: productIdOrItems }
+    : { product_id: productIdOrItems, quantity }
+  const { data } = await apiClient.post<ApiResponse<MohongOrder>>('/mohong/orders', payload)
   return data.data
 }