Allow custom editor typeface and font weight on macOS

[bawanyadam]

Imported from Canny.

Request

I would like to be able to use a custom typeface in the editor. I would like to be able to select a typeface from my Mac to use. I would like to be able to change the font weight.

Scope

• Platform: macOS
• Area: editor customization / appearance

Notes

This would let users choose a system-installed typeface for the editor and adjust the font weight used while writing.

Possible considerations:

• Whether the setting applies globally or per vault
• Whether Markdown preview and editing mode share the same typeface
• How custom weights interact with bold Markdown text
• Whether unavailable fonts should fall back gracefully if a vault is opened on another Mac