feat(route): add Minhang Museum exhibition route

[magazian]

Involved Issue / 该 PR 相关 Issue

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Example for the Proposed Route(s) / 路由地址示例

/minhangmuseum/interim

New RSS Route Checklist / 新 RSS 路由检查表

• New Route / 新的路由
  • Follows Script Standard / 跟随 路由规范
• Anti-bot or rate limit / 反爬/频率限制
  • If yes, do your code reflect this sign? / 如果有, 是否有对应的措施?
• Date and time / 日期和时间
  • Parsed / 可以解析
  • Correct time zone / 时区正确
• New package added / 添加了新的包
• Puppeteer

Note / 说明

[github-actions]

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• [Description Content / Rule 11, 22] lib/routes/minhangmuseum/interim.tsx: the description is built entirely from metadata — it repeats the pubDate (the 开展 date is exactly what is passed to pubDate) plus 闭展/原始展期/地点, and contains no actual exhibition content. Fix: fetch the exhibition introduction body from the detail page (the detail $detail object is already loaded) and render that as description; drop the 开展 line since it duplicates pubDate.

• [Valid Item Properties / Rule 18] lib/routes/minhangmuseum/interim.tsx: the _extra: { museumName, location, startDate, endDate } fields are custom keys that RSSHub never emits, so they are dead weight in the cached payload. Fix: remove the _extra block (keep location/dates only where they are actually rendered).

[github-actions]

Successfully generated as following:

http://localhost:1200/minhangmuseum/interim - Failed ❌

HTTPError: Response code 503 (Service Unavailable)

Error Message:<br/>FetchError: [GET] &quot;https://minhangmuseum.shmh.gov.cn/weixin/interim/list.htm&quot;: 403 Forbidden
Route: /minhangmuseum/interim
Full Route: /minhangmuseum/interim
Node Version: v24.19.0
Git Hash: 507a266d

[magazian]

the route works locally