fix(customer-service): 修复在线客服功能使其可用

- 在微信客服按钮补全必要属性 sessionFrom、onContact、showMessageCard 和 sendMessageTitle
- 将按钮样式由 Tailwind 类改为内联样式，避免 border-0 干扰原生按钮渲染
- 添加真机预览测试提示，解决开发者工具无法使用问题
- `ShopChatMessage` 和相关接口新增 conversationId 字段支持消息会话关联
- 消息发送时补全 conversationId 和发送人 ID，保证消息关联准确
- 将会话列表中引用的不存在字段 lastMessage 替换为 content
- 移除无用的 useReachBottom，改用 ScrollView 的 onScrollToLower 事件加载历史消息
- 删除未使用的 scrollToBottom ref
- 增加条件守卫避免非历史展开时加载更多消息

src/pages/user/customer-service/index.tsx

@@ -1,13 +1,13 @@
 import React, { useEffect, useState, useCallback, useRef } from 'react'
 import { View, Text, Button, Input, ScrollView } from '@tarojs/components'
-import Taro, { useReachBottom } from '@tarojs/taro'
+import Taro from '@tarojs/taro'
 import NavBar from '@/components/NavBar'
 import LoadMore from '@/components/common/LoadMore'
 import EmptyState from '@/components/common/EmptyState'
 import { pageShopChatConversation, addShopChatConversation } from '@/api/shop/shopChatConversation'
 import { pageShopChatMessage, addShopChatMessage } from '@/api/shop/shopChatMessage'
 import type { ShopChatConversation, ShopChatConversationParam } from '@/api/shop/shopChatConversation/model'
-import type { ShopChatMessage } from '@/api/shop/shopChatMessage/model'
+import type { ShopChatMessage, ShopChatMessageParam } from '@/api/shop/shopChatMessage/model'
 import type { PageResult } from '@/api'
 
 definePageConfig({
@@ -29,7 +29,6 @@ const CustomerServicePage: React.FC = () => {
   const [hasMore, setHasMore] = useState(true)
   const [msgPage, setMsgPage] = useState(1)
   const [showHistory, setShowHistory] = useState(false)
-  const scrollToBottom = useRef(false)
 
   const isOnline = () => {
     const now = new Date()
@@ -37,6 +36,12 @@ const CustomerServicePage: React.FC = () => {
     return h >= 9 && h < 21
   }
 
+  // 获取当前用户ID
+  const getCurrentUserId = (): number | undefined => {
+    const id = Taro.getStorageSync('UserId')
+    return id || undefined
+  }
+
   // 加载会话列表
   const loadConversations = useCallback(async () => {
     setLoading(true)
@@ -68,19 +73,19 @@ const CustomerServicePage: React.FC = () => {
   const loadMessages = useCallback(async (conversationId: number, pageNum: number = 1, isLoadMore = false) => {
     if (isLoadMore) setLoadingMore(true)
     try {
-      const result = await pageShopChatMessage({
+      const params: ShopChatMessageParam = {
         conversationId,
         page: pageNum,
         limit: 20,
         order: 'asc',
         sort: 'createTime',
-      } as any)
+      }
+      const result = await pageShopChatMessage(params)
       if (result?.list) {
         if (isLoadMore) {
           setMessages(prev => [...result.list!, ...prev])
         } else {
           setMessages(result.list)
-          scrollToBottom.current = true
         }
         setHasMore((result.list.length ?? 0) >= 20)
         setMsgPage(pageNum)
@@ -97,11 +102,12 @@ const CustomerServicePage: React.FC = () => {
     loadConversations()
   }, [loadConversations])
 
-  useReachBottom(() => {
-    if (hasMore && currentConversation && !loadingMore) {
+  // ScrollView 滚动到底部加载更多历史消息
+  const handleScrollToLower = () => {
+    if (hasMore && currentConversation && !loadingMore && showHistory) {
       loadMessages(currentConversation.id!, msgPage + 1, true)
     }
-  })
+  }
 
   // 创建新会话
   const ensureConversation = async (): Promise<ShopChatConversation | null> => {
@@ -140,18 +146,21 @@ const CustomerServicePage: React.FC = () => {
         return
       }
 
+      const userId = getCurrentUserId()
       await addShopChatMessage({
+        conversationId: conv.id,
         content: text,
         type: 'text',
+        formUserId: userId,
         toUserId: 0, // 发送给客服（服务端路由）
-      } as any)
+      })
 
       // 消息发送成功后刷新消息列表
       await loadMessages(conv.id, 1, false)
 
-      // 同步更新会话列表 lastMessage
+      // 同步更新会话列表 content 字段
       setConversations(prev => prev.map(c =>
-        c.id === conv.id ? { ...c, lastMessage: text, updateTime: new Date().toISOString() } : c
+        c.id === conv.id ? { ...c, content: text, updateTime: new Date().toISOString() } : c
       ))
     } catch (e: any) {
       console.error('发送消息失败:', e)
@@ -162,6 +171,11 @@ const CustomerServicePage: React.FC = () => {
     }
   }
 
+  // 微信客服回调 - 用户从客服会话返回时触发
+  const handleContact = (e: any) => {
+    console.log('客服会话回调:', e.detail)
+  }
+
   // 拨打热线
   const handleCallHotline = () => {
     Taro.makePhoneCall({ phoneNumber: SERVICE_HOTLINE })
@@ -205,7 +219,12 @@ const CustomerServicePage: React.FC = () => {
     <View className="flex flex-col min-h-screen bg-gray-100">
       <NavBar title="在线客服" />
 
-      <ScrollView scrollY className="flex-1">
+      <ScrollView
+        scrollY
+        className="flex-1"
+        onScrollToLower={handleScrollToLower}
+        lowerThreshold={50}
+      >
         {/* 客服状态栏 */}
         <View className="bg-white px-4 py-3 flex items-center justify-between">
           <View className="flex items-center gap-2">
@@ -222,11 +241,25 @@ const CustomerServicePage: React.FC = () => {
         <View className="px-4 py-3 bg-white border-t border-gray-50">
           <Button
             openType="contact"
-            className="w-full h-12 rounded-lg text-white font-medium text-base border-0"
-            style={{ backgroundColor: '#07c160', lineHeight: '48px' }}
+            sessionFrom="customer_service"
+            onContact={handleContact}
+            showMessageCard
+            sendMessageTitle="欢迎咨询"
+            className="w-full rounded-lg text-white font-medium text-base"
+            style={{
+              backgroundColor: '#07c160',
+              lineHeight: '48px',
+              height: '48px',
+              borderRadius: '8px',
+              border: 'none',
+              padding: '0',
+            }}
           >
             微信在线客服
           </Button>
+          <Text className="text-xs text-gray-400 block text-center mt-2">
+            点击进入微信客服对话（开发者工具中不可用，请用真机预览测试）
+          </Text>
         </View>
 
         {/* 消息记录入口 */}
@@ -276,7 +309,7 @@ const CustomerServicePage: React.FC = () => {
                   >
                     <View className="flex justify-between items-center">
                       <Text className="text-sm text-gray-700" style={{ flex: 1, overflow: 'hidden', textOverflow: 'ellipsis', whiteSpace: 'nowrap' }}>
-                        {conv.content || conv.lastMessage || '暂无消息'}
+                        {conv.content || '暂无消息'}
                       </Text>
                       <Text className="text-xs text-gray-400 ml-2">{formatTime(conv.updateTime)}</Text>
                     </View>