DSH web plugin for the composer: shell-style prompt history (Up/Down with prefix search, Ctrl+R reverse search), Codex-style history completion and next-prompt prediction ghosted in the empty input (Tab or → to accept), a selection toolbar (copy / quote /

开放的侧边栏底座，支持三方拓展注册新侧边栏页面。内置文件渲染编辑/终端/侧边对话/Git/子代理页面 ｜ Open sidebar foundation, supports third-party extensions to register new sidebar pages. Built-in file rendering/editing, terminal, side chat, Git, and sub-agent pages.