dsh-plugins#dsh-web-search

yugasun

向 ctx.web 注册百度、豆包、Tavily、Exa 后端供官方 web_search 使用，并在 Tavily 或 Exa 生效时将 web_fetch 转到对应提取接口。

Registers Baidu, Doubao, Tavily, and Exa backends into ctx.web so official web_search can use them, and routes web_fetch through Tavily Extract or Exa Contents when that backend is active.