Add Automatic Dark Mode option

[ztc0611]

I feel like having it just match the theme of the rest of macOS makes more sense and matches the minimalism. This is nice especially for people who use Auto instead of having their computer fixed in Light or Dark.

Note for testing:
macOS 15.4 seems to have buggy behavior with theme switch animations, but when testing it on 15.0.1 it works with the default fade animation as expected. Not sure about .1/.2/.3.

[quiint]

works on my machine (15.5 Beta 24F5053f)
i don't see the animation, but the theme switches! this could be useful, but i also think it would be good to keep the theme switcher icon just in case this doesn't match the specific users preferences. other than that, looks good to me - thanks for contributing!

[farzaa]

i like the change, but, lets keep the button.

pulling from their system is fine on initial load lets keep that

[ztc0611]

i like the change, but, lets keep the button.

pulling from their system is fine on initial load lets keep that

So have 3 button states, light/dark/automatic, or open in automatic with the option to switch?

[ztc0611]

works on my machine (15.5 Beta 24F5053f) i don't see the animation, but the theme switches! this could be useful, but i also think it would be good to keep the theme switcher icon just in case this doesn't match the specific users preferences. other than that, looks good to me - thanks for contributing!

It appears to me like it was broken universally on macOS 15.4. Both macs I have access to don’t exhibit light → dark mode animation on any app I have open even ones that absolutely did on earlier versions of 15 (and <15).

[ztc0611]

I pushed a squashed, improved version with the options of light, dark, and auto in a popover menu. let me know what you think :)

If anybody knows how to fix the issue where clicking between the icon and the text causes it to not trigger the effect, please advise. I can't quite figure that one out. Besides that, should work.

[ztc0611]

I think I fixed the animation now, too.

[ztc0611]

I've tested it a bit over the past few days and I think it's working pretty well. There might be some edge cases I failed to find though.