I really like that kagi.com and kagifeedback.org have different colored favicons, this makes it easy to distinguish what site is what in the tab bar. I just upgraded to Ultimate and the fact that it uses the same favicon as kagifeedback.org is a bit confusing in my tab bar.
The Assistant should have its favicon to be a distinct color from both kagi.com and kagifeedback.org. Maybe a greenish/teal color, that seems AI-y to me.