Have you searched existing Github issues to see if someone has already requested this feature?
Yes

Is your feature request related to a problem? Please describe.
Cursor blink rate is too distracting

Describe the solution you'd like
Option that sets CodeMirror's cursorBlinkRate to 0, or the ability to customize the value

Additional context
CodeMirror provides the variable cursorBlinkRate, which it appears heynote currently hardcodes as 1000(ms)
https://github.com/heyman/heynote/blob/8e92ac4ddc01ba1c2ba4b23c03b5683dcf701aa1/src/editor/editor.js#L111C17-L112C55