优化下单流程

src/hooks/useCart.ts

@@ -9,6 +9,8 @@ export interface CartItem {
   image: string;
   quantity: number;
   addTime: number;
+  skuId?: number;
+  specInfo?: string;
 }
 
 // 购物车Hook
@@ -51,9 +53,15 @@ export const useCart = () => {
     name: string;
     price: string;
     image: string;
+    skuId?: number;
+    specInfo?: string;
   }, quantity: number = 1) => {
     const newItems = [...cartItems];
-    const existingItemIndex = newItems.findIndex(item => item.goodsId === goods.goodsId);
+    // 如果有SKU，需要根据goodsId和skuId来判断是否为同一商品
+    const existingItemIndex = newItems.findIndex(item =>
+      item.goodsId === goods.goodsId &&
+      (goods.skuId ? item.skuId === goods.skuId : !item.skuId)
+    );
 
     if (existingItemIndex >= 0) {
       // 如果商品已存在，增加数量
@@ -66,7 +74,9 @@ export const useCart = () => {
         price: goods.price,
         image: goods.image,
         quantity,
-        addTime: Date.now()
+        addTime: Date.now(),
+        skuId: goods.skuId,
+        specInfo: goods.specInfo
       };
       newItems.push(newItem);
     }
@@ -98,7 +108,7 @@ export const useCart = () => {
       return;
     }
 
-    const newItems = cartItems.map(item => 
+    const newItems = cartItems.map(item =>
       item.goodsId === goodsId ? { ...item, quantity } : item
     );
     setCartItems(newItems);