fix: 保持商品顺序不变，分类切换和筛选时不再重新排序

pages/index/index.js

@@ -266,7 +266,7 @@ Page({
         goods: updatedGoods
       }, () => {
         // 重新应用筛选条件，确保显示的商品收藏状态也更新
-        const filteredGoods = this.applyFilters(this.data.goods);
+        const filteredGoods = this.applyFilters(this.data.goods, false);
         const { leftColumnGoods, rightColumnGoods } = this.distributeToColumns(filteredGoods);
         this.setData({
           filteredGoods: filteredGoods,
@@ -326,11 +326,13 @@ Page({
       return
     }
     
+    const existingGoods = [...this.data.goods]
+    
     this.setData({
       isRefreshing: true,
       page: 1,
       hasMoreData: true,
-      goods: [],
+      goods: existingGoods,
       filteredGoods: [],
       leftColumnGoods: [],
       rightColumnGoods: []
@@ -350,7 +352,7 @@ Page({
       this.setData({ isRefreshing: false })
       
       if (res.success && res.products) {
-        this.processGoodsData(res.products, false)
+        this.processRefreshData(res.products, existingGoods)
         wx.showToast({
           title: '刷新成功',
           icon: 'success',
@@ -503,6 +505,57 @@ Page({
     })
   },
   
+  // 处理刷新数据 - 查重并保持原有商品
+  processRefreshData: function(newProducts, existingGoods) {
+    let newGoods = newProducts.map(product => {
+      const imageUrls = product.imageUrls || product.images || [];
+      const formattedImageUrls = Array.isArray(imageUrls) ? imageUrls : [imageUrls];
+      
+      return {
+        ...product,
+        fullRegion: product.region || '',
+        region: product.region ? this.extractProvince(product.region) : '',
+        grossWeight: product.grossWeight || product.weight || '',
+        displayGrossWeight: product.grossWeight || product.weight || '',
+        status: product.status || 'published',
+        createdAt: product.created_at || product.createTime || null,
+        reservedCount: product.reservedCount || product.selected || 0,
+        reservedCountDisplay: product.reservedCount || product.selected || 0,
+        sales: product.sales || product.reservedCount || Math.floor(Math.random() * 1000) + 100,
+        product_contact: product.product_contact || '',
+        contact_phone: product.contact_phone || '',
+        supplyStatus: product.supplyStatus || '',
+        sourceType: product.sourceType || '',
+        negotiateStatus: '可议价',
+        isReserved: false,
+        isFavorite: false,
+        currentImageIndex: 0,
+        imageUrls: formattedImageUrls
+      }
+    })
+    
+    newGoods = newGoods.filter(item => (item.status || '').toLowerCase() !== 'hidden')
+    
+    const existingIds = new Set(existingGoods.filter(item => !item.isAd).map(item => item.id));
+    const uniqueNewGoods = newGoods.filter(item => !existingIds.has(item.id));
+    
+    const updatedGoods = [...existingGoods, ...uniqueNewGoods]
+    
+    const filteredGoods = this.applyFilters(updatedGoods, false)
+    
+    const { leftColumnGoods, rightColumnGoods } = this.distributeToColumns(filteredGoods)
+    
+    this.setData({
+      goods: updatedGoods,
+      filteredGoods: filteredGoods,
+      leftColumnGoods: leftColumnGoods,
+      rightColumnGoods: rightColumnGoods,
+      loadingMore: false,
+      isLoading: false,
+      page: this.data.page + 1
+    })
+  },
+  
   // 插入广告位数据
   insertAdSlots: function(goods) {
     if (!goods || goods.length === 0) return goods
@@ -770,7 +823,7 @@ Page({
       app.globalData.showTabBar = true;
     }
     
-    const filteredGoods = this.applyFilters(this.data.goods)
+    const filteredGoods = this.applyFilters(this.data.goods, false)
     const groupedGoods = this.groupGoodsForStaggeredLayout(filteredGoods)
     const { leftColumnGoods, rightColumnGoods } = this.distributeToColumns(filteredGoods)
     this.setData({
@@ -809,7 +862,7 @@ Page({
         this.refreshGoodsList();
       } else {
         // 否则仅对本地商品进行筛选
-        const filteredGoods = this.applyFilters(this.data.goods)
+        const filteredGoods = this.applyFilters(this.data.goods, false)
         const groupedGoods = this.groupGoodsForStaggeredLayout(filteredGoods)
         const { leftColumnGoods, rightColumnGoods } = this.distributeToColumns(filteredGoods)
         this.setData({
@@ -1063,7 +1116,7 @@ Page({
             goods: updatedGoodsList
           }, () => {
             // 重新应用筛选条件，确保显示的商品收藏状态也更新
-            const filteredGoods = this.applyFilters(this.data.goods);
+            const filteredGoods = this.applyFilters(this.data.goods, false);
             const { leftColumnGoods, rightColumnGoods } = this.distributeToColumns(filteredGoods);
             this.setData({
               filteredGoods: filteredGoods,