feat(miniprogram): 文章分享功能 onShareAppMessage

- 文章详情页注册微信分享（分享标题 + 路径带 article id）
- 分享时触发 article_share 埋点事件

apps/miniprogram/src/pages/article/detail/index.tsx

@@ -1,7 +1,8 @@
 import React, { useState, useEffect } from 'react';
 import { View, Text, RichText } from '@tarojs/components';
-import Taro, { useRouter } from '@tarojs/taro';
+import Taro, { useRouter, useShareAppMessage } from '@tarojs/taro';
 import { getArticleDetail, Article } from '../../../services/article';
+import { trackEvent } from '@/services/analytics';
 import './index.scss';
 
 export default function ArticleDetail() {
@@ -11,6 +12,14 @@ export default function ArticleDetail() {
   const [article, setArticle] = useState<Article | null>(null);
   const [loading, setLoading] = useState(true);
 
+  useShareAppMessage(() => {
+    trackEvent('article_share', { article_id: id });
+    return {
+      title: article?.title || '健康资讯',
+      path: `/pages/article/detail/index?id=${id}`,
+    };
+  });
+
   useEffect(() => {
     if (!id) return;
     setLoading(true);