在首页添加库存总数显示功能，计算并展示所有商品的库存总数

pages/index/index.js

@@ -47,6 +47,9 @@ Page({
     page: 1,
     pageSize: 8,
     
+    // 库存总数
+    totalInventory: 0,
+    
     // 商品数据缓存
     goodsCache: [],
     categoryQueryCache: {},
@@ -416,6 +419,19 @@ Page({
     }
     return "";
   },
+
+  // 计算商品库存总数
+  calculateTotalInventory: function(goodsList) {
+    let total = 0;
+    goodsList.forEach(good => {
+      if (good.minOrder && !isNaN(parseInt(good.minOrder))) {
+        total += parseInt(good.minOrder);
+      } else if (good.quantity && !isNaN(parseInt(good.quantity))) {
+        total += parseInt(good.quantity);
+      }
+    });
+    return total;
+  },
   
   // 提取地区中的省份信息
   extractProvince: function(region) {
@@ -541,12 +557,16 @@ Page({
       console.log('filteredGoods[1].category:', filteredGoods[1] ? filteredGoods[1].category : 'N/A')
     }
     
+    // 计算库存总数
+    const totalInventory = this.calculateTotalInventory(updatedGoods);
+    
     this.setData({
       goods: updatedGoods,
       filteredGoods: filteredGoods,
       loadingMore: false,
       isLoading: false,
-      page: this.data.page + 1
+      page: this.data.page + 1,
+      totalInventory: totalInventory
     })
   },
   
@@ -605,12 +625,16 @@ Page({
     
     const filteredGoods = this.applyFilters(updatedGoods, false)
     
+    // 计算库存总数
+    const totalInventory = this.calculateTotalInventory(updatedGoods);
+    
     this.setData({
       goods: updatedGoods,
       filteredGoods: filteredGoods,
       loadingMore: false,
       isLoading: false,
-      page: this.data.page + 1
+      page: this.data.page + 1,
+      totalInventory: totalInventory
     })
   },
   

pages/index/index.wxml

@@ -120,6 +120,10 @@
   
   <!-- 商品列表区域 -->
   <view class="goods-section">
+    <!-- 库存总数显示 -->
+    <view wx:if="{{totalInventory > 0}}" class="total-inventory-section">
+      <text class="total-inventory-text">库存总数：{{totalInventory}}件</text>
+    </view>
     <scroll-view 
       class="goods-list" 
       id="goodsScrollView"

pages/index/index.wxss

@@ -148,7 +148,21 @@ page {
   padding-bottom: calc(env(safe-area-inset-bottom) );
 }
 
-.goods-list {
+/* 库存总数显示样式 */
+.total-inventory-section {
+  background: #fff;
+  padding: 20rpx 30rpx;
+  border-bottom: 1rpx solid #eee;
+  text-align: center;
+}
+
+.total-inventory-text {
+   font-size: 32rpx;
+   font-weight: bold;
+   color: #333;
+ }
+
+ .goods-list {
   height: auto;
   box-sizing: border-box;
   background: #f5f5f5;