feat(frontend): 首页推荐商品支持向下翻页

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

cfc-frontend/pages/index-home/index.vue

@@ -219,8 +219,10 @@
         <text class="section-more" @click="goMoreProducts">更多 ›</text>
       </view>
       <DimensionProducts
+        ref="dimensionProducts"
         :isLoggedIn="true"
-        :showMore="false"
+        :showMore="true"
+        layout="mall"
         @productClick="goProductDetail" />
     </view>
 
@@ -830,7 +832,16 @@ title: '添加家庭成员',
     // 定期调研待办角标（内部自检登录态，未登录静默清空）
     this._loadSurveyBadge()
   },
+  onReachBottom() {
+    // 滚动到页面底部时自动加载推荐商品（委托给 DimensionProducts.loadMore()）
+    this.loadMoreProducts()
+  },
   methods: {
+    loadMoreProducts() {
+      if (this.$refs.dimensionProducts) {
+        this.$refs.dimensionProducts.loadMore()
+      }
+    },
     _checkSplashReady() {
       this._splashLoadCount++
       this._tryHideSplash()