dsh-zoom

Global UI zoom for the DeepSeek Harness web client: scales the whole interface — sidebar, menus, settings, overlays and conversation — from the keyboard.

Unofficial community plugin. Not affiliated with, endorsed by, or published by DeepSeek.

Why this exists

DeepSeek Harness ships one typography setting, ui-theme.fontSize, which affects conversation body text only. Sidebar labels, menus and settings chrome are fixed pixel sizes, and the app has no page zoom: its menu has no View/zoom roles and its code exposes no setZoomLevel/zoomFactor. So Cmd + = does nothing out of the box. This plugin adds that.

Install

In the app — sidebar → Plugins → Add plugin, then enter:

github:DC-507/dsh-zoom

The Host reads the spec, confirms the package is a bundle, and installs it. Choose Enable now when the install finishes. (An npm release may follow; that would make the shorter dsh-zoom spec work too.)

From a terminal (bundled CLI):

"/Applications/DeepSeek Harness.app/Contents/Resources/runtime/cli/bin/dsh" \
  plugin --profile desktop add github:DC-507/dsh-zoom

A restart is the guaranteed way to activate it; profiles with HMR usually recompose on their own.

Shortcuts

Shortcut	Action
Cmd/Ctrl + = (also Cmd/Ctrl + Shift + =, i.e. +)	zoom in one step
Cmd/Ctrl + -	zoom out one step
Cmd/Ctrl + 0	back to 100%

Steps: 80 · 90 · 100 · 110 · 125 · 150 · 175 · 200 %. The level is persisted in localStorage (dsh-zoom:level) and restored on the next launch. For scripting or debugging, the page exposes __dshZoom.get(), __dshZoom.set(1.25), __dshZoom.step(±1) and __dshZoom.reset().

How it works

• The zoom is document.documentElement.style.zoom — the standardised Chromium CSS zoom property. It must live on the root element: zooming a wrapper instead collapses the app frame (#root measures 0 height) and introduces a horizontal scrollbar.
• Because CSS zoom does not rescale viewport units, the plugin also injects a small !important patch for the few surviving max-height: calc(100vh …) / 100dvh overlay clamps (menu scroll region, risk-confirmation dialog, toast, image lightbox). Those rules are addressed by hashed class names, so each is applied only if it exists in the running build; on any other build the patch is simply empty and the core zoom is unaffected.
• The shortcuts are a window capture-phase keydown listener. The shell dispatches its own shortcuts on document in the capture phase, so a window listener runs first; the chord is consumed with preventDefault + stopImmediatePropagation before editors, the terminal or the composer can see it.
• Persistence uses localStorage, which is real and durable on the desktop shell's dsh-app://app origin (registered standard + secure, default session, no CSP).

Known limitations

• Canvas-backed surfaces (xterm terminal, Monaco editors, PDF/spreadsheet previews) rasterize at the unzoomed size and look slightly soft at higher factors. Each change dispatches a resize so they re-measure.
• The shortcuts do not fire while focus is inside a sidebar browser/preview <webview> or iframe — click the main window first.
• macOS traffic lights are positioned in window points and do not scale. Above 125 % check the top strip and the window drag region.
• In a plain browser (not the desktop shell), Cmd + = is the browser's own zoom; this plugin calls preventDefault, so the page zoom is replaced by the plugin's CSS zoom.
• The app ships immediately: true prefetching, so the module loads at boot; plugins like this one cannot react to a build that renames every hashed class without a release.

Compatibility

Tested against DeepSeek Harness 0.2.0-rc.2 (Electron 44 / Chromium 152) on macOS. It declares no @deepseek-ai/dsh* peer dependency on purpose: the host half is an empty apply() and the browser half uses only standard DOM APIs, so there is nothing to version-gate. The viewport-unit patch is the only build-specific part and degrades to a no-op.

Development

npm test          # smoke test: DOM stub, no dependencies

backup/, launch-big.sh and rollback.sh are local development helpers and are excluded from the published tarball by files.

To iterate against a live install:

dsh plugin --profile desktop add "link:$PWD"   # symlinked install, edits are live after a reload
dsh plugin --profile desktop remove dsh-zoom

License

MIT — see LICENSE.

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dsh-zoom（中文）

DeepSeek Harness Web 客户端的整体界面缩放插件：侧栏、菜单、设置、浮层、对话一起放大，用快捷键控制。

非官方社区插件，与 DeepSeek 无隶属关系。

为什么需要它

DSH 只提供一个排版设置 ui-theme.fontSize，而且只影响对话正文；侧栏、菜单、设置页都是固定像素，应用本身也没有页面缩放（菜单里没有 View/缩放角色，代码里没有 setZoomLevel/zoomFactor），所以 Cmd + = 默认没有任何反应。

安装

应用内：侧栏 插件 → Add plugin，填 github:DC-507/dsh-zoom，装完点 Enable now。命令行同样可以：

"/Applications/DeepSeek Harness.app/Contents/Resources/runtime/cli/bin/dsh" \
  plugin --profile desktop add github:DC-507/dsh-zoom

快捷键	动作
Cmd/Ctrl + =（或 Cmd+Shift+=）	放大一档
Cmd/Ctrl + -	缩小一档
Cmd/Ctrl + 0	回到 100%

档位 80/90/100/110/125/150/175/200%，存在 localStorage，重启保留。

实现要点

缩放用标准 CSS zoom 挂在 <html> 上；挂包裹元素会把 #root 压成 0 高度并出现横向滚动条。由于 CSS zoom 不缩放视口单位，插件会为少数 100vh/100dvh 浮层钳制规则注入带 !important 的补丁，且这些规则按类名哈希存在才注入，换版本后自动变成空补丁而不影响主体。快捷键走 window 捕获阶段，早于外壳在 document 上的派发器。

已知限制

画布类面板（终端、Monaco、PDF/表格预览）高倍率下略糊；焦点在侧栏 <webview>/iframe 里时快捷键不生效；macOS 红绿灯不参与缩放，125% 以上请留意顶栏拖拽区；在普通浏览器里会顶掉浏览器自带的页面缩放。

许可证

MIT，见 LICENSE。