Use a monospace font for notes

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• I've checked for duplicate issues by using the search function of the issue tracker

Is your feature request related to a problem?

nope

Describe the solution you'd like

It'd be nice if the font used for the custom notes were monospace. Sometimes I like to structure my notes as a "pseudo table" and the columns not lining up is a bit triggering :). Obviously not a huge issue, but a simple nice to have. Perhaps a global setting, even for other parts of the UI?

Describe alternatives you've considered

No response

Additional context

No response

issue 中没有指出文件、测试或入口点。首先定位 custom-notes UI 及其字体样式，然后检查附近的 UI 设置，再决定该更改是局部的还是全局的。完成的标准是自定义备注使用等宽字体，且受影响的 UI 仍可使用。