refactor(shop): 简化商品详情页客服功能

- 用户反馈客服功能复杂，改为使用微信原生 open-type="contact" 按钮
- 删除 handleContactService 函数及页面跳转逻辑
- 替换客服图标组件为 Button，使用 openType="contact" 触发联系客服
- 保留客服页面但不再从商品详情页跳转
- 提示 open-type="contact" 需真机预览测试，开发者工具无反应

src/pages/shop/product-detail.tsx

@@ -1,5 +1,5 @@
 import React, { useState, useEffect, useRef } from 'react'
-import { View, Text, Image, ScrollView, Swiper, SwiperItem, RichText } from '@tarojs/components'
+import { View, Text, Image, ScrollView, Swiper, SwiperItem, RichText, Button } from '@tarojs/components'
 import { Tag } from '@nutui/nutui-react-taro'
 import Taro, { useRouter, useDidShow } from '@tarojs/taro'
 import { getShopGoods } from '@/api/shop/shopGoods'
@@ -193,10 +193,6 @@ const ProductDetailPage: React.FC = () => {
     Taro.navigateTo({ url: '/pages/shop/cart' })
   }
 
-  const handleContactService = () => {
-    Taro.navigateTo({ url: '/pages/user/customer-service/index' })
-  }
-
   if (!product) {
     return (
       <View className='min-h-screen bg-white flex items-center justify-center'>
@@ -454,10 +450,22 @@ const ProductDetailPage: React.FC = () => {
             </View>
             <Text className='text-xs text-gray-500 mt-1 whitespace-nowrap'>购物车</Text>
           </View>
-          <View className='flex-1 flex flex-col items-center' onClick={handleContactService}>
+          <Button
+            openType="contact"
+            sessionFrom="product_detail"
+            className='flex-1 flex flex-col items-center'
+            style={{
+              background: 'transparent',
+              border: 'none',
+              padding: '0',
+              margin: '0',
+              lineHeight: 'normal',
+              fontSize: 'inherit',
+            }}
+          >
             <Text className='text-lg'>💬</Text>
             <Text className='text-xs text-gray-500 mt-1'>客服</Text>
-          </View>
+          </Button>
           <View className='flex-1 flex flex-col items-center' onClick={toggleFavorite}>
             <Text className='text-lg'>{isFavorite ? '❤️' : '🤍'}</Text>
             <Text className='text-xs text-gray-500 mt-1'>收藏</Text>