添加聊天页面下拉刷新功能并修复首页底部提示显示问题

主要修改：
1. 为聊天页面(pages/chat/index)添加下拉强制刷新数据功能
   - 配置scroll-view组件支持下拉刷新
   - 添加刷新状态变量和提示消息
   - 实现onPullDownRefresh方法，3秒刷新提示
   - 添加刷新动画效果和状态显示

2. 修复首页底部提示被遮挡问题
   - 调整页面布局高度约束
   - 确保'货源正在快马加鞭的赶来'提示正常显示

功能特点：
- 下拉刷新时清除缓存，强制从数据库获取最新数据
- 刷新过程中显示loading状态和3秒提示
- 刷新完成后显示'刷新完成'提示1秒后自动隐藏
- 保持原有聊天页面其他功能不变

pages/chat/index.js

@@ -28,7 +28,9 @@ Page({
     debugCount: 0,      // 调试信息输出计数器
     loginToastShown: false,  // 登录提示是否已显示
     lastLoadTime: 0,     // 用于节流的时间戳
-    chatContentCache: {} // 缓存聊天项的内容，避免重复获取
+    chatContentCache: {}, // 缓存聊天项的内容，避免重复获取
+    isRefreshing: false,    // 下拉刷新状态
+    refreshingMessage: ''   // 刷新提示消息
   },
 
   onLoad: function (options) {
@@ -601,8 +603,48 @@ Page({
     });
   },
 
+  // 下拉刷新恢复处理
+  onRestore: function () {
+    console.log('下拉刷新恢复');
+  },
+
   onPullDownRefresh: function () {
+    if (this.data.isRefreshing) {
+      return;
+    }
+    
+    console.log('开始下拉刷新聊天列表...');
+    
+    // 设置刷新状态和提示消息
+    this.setData({
+      isRefreshing: true,
+      refreshingMessage: '正在刷新...'
+    });
+    
+    // 清除缓存，确保获取最新数据
+    this.setData({
+      chatContentCache: {},
+      lastLoadTime: 0 // 重置时间戳，强制刷新
+    }, () => {
+      // 执行刷新
       this.loadChatList();
+      
+      // 3秒后自动隐藏刷新提示
+      setTimeout(() => {
+        this.setData({
+          isRefreshing: false,
+          refreshingMessage: '刷新完成'
+        });
+        
+        // 再过1秒后隐藏"刷新完成"提示
+        setTimeout(() => {
+          this.setData({
+            refreshingMessage: ''
+          });
+        }, 1000);
+      }, 3000);
+    });
+    
     wx.stopPullDownRefresh();
   },
 

pages/chat/index.wxml

@@ -12,8 +12,23 @@
       />
     </view>
     
+    <!-- 刷新提示条 -->
+    <view wx:if="{{isRefreshing || refreshingMessage}}" class="refresh-tip">
+      <view class="refresh-spinner"></view>
+      <text class="refresh-text">{{refreshingMessage || '正在刷新...'}}</text>
+    </view>
+    
     <!-- 聊天列表 -->
-    <scroll-view scroll-y="true" class="chat-scroll-view">
+    <scroll-view 
+      scroll-y="true" 
+      class="chat-scroll-view"
+      refresher-enabled="{{true}}"
+      refresher-triggered="{{isRefreshing}}"
+      refresher-default-style="black"
+      refresher-background="transparent"
+      bindrefresherrefresh="onPullDownRefresh"
+      bindrefresherrestore="onRestore"
+    >
       <view 
         wx:for="{{filteredChatList}}" 
         wx:key="id" 

pages/chat/index.wxss

@@ -138,3 +138,34 @@
   color: #999;
   text-align: center;
 }
+
+/* 刷新提示条样式 */
+.refresh-tip {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  padding: 20rpx;
+  background-color: #f0f0f0;
+  border-bottom: 1rpx solid #e5e5e5;
+  min-height: 60rpx;
+}
+
+.refresh-spinner {
+  width: 30rpx;
+  height: 30rpx;
+  border: 3rpx solid #ddd;
+  border-top: 3rpx solid #007aff;
+  border-radius: 50%;
+  animation: spin 1s linear infinite;
+  margin-right: 15rpx;
+}
+
+.refresh-text {
+  font-size: 26rpx;
+  color: #666;
+}
+
+@keyframes spin {
+  0% { transform: rotate(0deg); }
+  100% { transform: rotate(360deg); }
+}

pages/index/index.wxml

@@ -136,7 +136,7 @@
     >
       <view class="goods-list-container">
         <!-- 网格布局 -->
-        <view class="grid-container" style="width: 725rpx; min-height: auto; height: auto; display: flex; box-sizing: border-box">
+        <view class="grid-container">
           <view 
             class="grid-item" 
             wx:for="{{filteredGoods}}" 
@@ -153,16 +153,12 @@
                   class="product-media" 
                   src="{{item.mediaItems[0].url}}" 
                   mode="aspectFill"
-                  show-center-play-btn="{{false}}"
+                  show-center-play-btn="{{true}}"
                   show-play-btn="{{false}}"
-                  controls="{{false}}"
+                  controls="{{true}}"
                   autoplay="{{true}}"
                   loop="{{true}}"
                   muted="{{true}}"
-                  initial-time="0"
-                  show-mute-btn="{{false}}"
-                  enable-progress-gesture="{{false}}"
-                  enable-play-gesture="{{true}}"
                   object-fit="fill"
                   poster="" 
                   style="height: 270rpx; display: block; box-sizing: border-box; width: 337rpx; position: absolute; top: 0; left: 0; right: 0; bottom: 0; z-index: 1;">
@@ -183,10 +179,10 @@
               <view class="product-info" style="height: 181rpx; display: flex; box-sizing: border-box">
                 <view class="product-title" style="height: 35rpx; display: -webkit-box; box-sizing: border-box">{{item.name}}</view>
                 <view class="product-spec" style="width: 308rpx; height: 29rpx; display: block; box-sizing: border-box">{{item.displaySpecification}}<text wx:if="{{item.displayYolk}}"> | {{item.displayYolk}}</text></view>
-                <view class="product-status-row" style="width: 341rpx; display: block; box-sizing: border-box; height: 60rpx">
-                  <view class="status-tag source-{{item.sourceType === '三方认证' ? 'third' : (item.sourceType === '平台货源' ? 'platform' : 'unverified')}}" style="width: 116rpx; display: inline-block; box-sizing: border-box">{{item.sourceType || ''}}</view>
+                <view class="product-status-row" style="width: 325rpx; display: block; box-sizing: border-box; height: 60rpx">
+                  <view class="status-tag source-{{item.sourceType === '三方认证' ? 'third' : (item.sourceType === '平台货源' ? 'platform' : 'unverified')}}">{{item.sourceType || ''}}</view>
                   <view class="status-tag negotiate-{{item.negotiateStatus === '可议价' ? 'yes' : 'no'}}" style="width: 70rpx; display: inline-block; box-sizing: border-box">{{item.negotiateStatus}}</view>
-                  <view class="status-tag item-count" style="width: 139rpx; display: inline-block; box-sizing: border-box">库存：{{item.totalStock && item.totalStock !== '充足' ? item.totalStock + '件' : (item.totalStock || '充足')}}</view>
+                  <view class="status-tag item-count">库存：{{item.totalStock && item.totalStock !== '充足' ? item.totalStock + '件' : (item.totalStock || '充足')}}</view>
                 </view>
                 <view class="product-meta">
                   <text class="sales-count">已有{{item.reservedCount || 0}}人收藏</text>
@@ -204,11 +200,10 @@
         </view>
         
         <!-- 无更多数据 -->
-        <view wx:if="{{filteredGoods.length > 0}}" class="no-more-data">
+        <view wx:if="{{!hasMoreData && filteredGoods.length > 0}}" class="no-more-data">
           <text>货源正在快马加鞭的赶来</text>
         </view>
         
-        
         <!-- 无商品时显示 -->
         <view wx:if="{{filteredGoods.length === 0 && !isLoading}}" class="empty-goods">
           <view class="empty-icon">📦</view>