优化搜索结果页：半页空白区域添加淡化文本提示

pages/buyer/index.wxml

@@ -92,6 +92,11 @@
   </view>
 </view>
 
+<!-- 搜索结果后添加半页空白区域 -->
+<view class="half-page-blank" style="display: flex; justify-content: center; align-items: flex-start; padding-top: 20rpx;">
+        <text style="color: #999; font-size: 26rpx; opacity: 0.8;">已加载全部商品</text>
+</view>
+
 
 <!-- 自定义弹窗组件 -->
 <view class="custom-toast-mask" wx:if="{{showCustomToast}}" style="position: fixed; top: 0; left: 0; right: 0; bottom: 0; background: rgba(0, 0, 0, 0.4); display: flex; justify-content: center; align-items: center; z-index: 9999;">

pages/buyer/index.wxss

@@ -469,3 +469,10 @@ button:after {
   width: 100%;
   box-sizing: border-box;
 }
+
+/* 半页空白页样式 */
+.half-page-blank {
+  height: 32vh;
+  width: 100%;
+  box-sizing: border-box;
+}