为 better-sidebar 提供 Office 三件套预览（.docx/.xlsx/.pptx），独立 bundle 瘦身主体 | Provides Office-suite preview (.docx/.xlsx/.pptx) for better-sidebar as a separate bundle to slim the core

DSH web plugin: Office file previewers (.docx/.xlsx/.pptx) for the better-sidebar editor. Registers the docx/xlsx/pptx file viewers through ctx.betterSidebar.registerFileViewer, keeping the heavy Office render libraries (docx-preview / Univer / SheetJS /

侧边栏工作区树:按官方磁盘目录嵌套(官方 workspace-tree 语义),可选按名称中的 / 分组(默认关闭,设置里开启);新会话页的工作区选择器同树(同一份视图选项即时同步);添加工作区走官方目录流。Workspace tree for the DSH sidebar: disk-path nesting (official workspace-tree semantics), with optional "/"-name grouping (off by default), and the sa

DSH 能力插件:服务器卡片仪表盘——实时状态/CPU/内存/磁盘 + 趋势记录与可视化(1h/24h/7d/30d) + 点卡片进入 xterm 交互终端