fold 3

喵丝滑：dsh 前端行为增强——输入框失焦折叠高度 + 窄屏选中 Session 自动收起侧边栏（纯 client 插件，零 dsh 本体改动）

Fold plugin/extension settings entries in the DSH settings panel into one collapsible "Plugin entries" group row — one click to expand or collapse, auto-updating as plugins come and go.

Organize the DSH settings panel nav: fold third-party plugin entries under collapsible group rows, with bookmark-style custom groups and a fold toggle in General settings.