Theme should switch between light/dark based on system setting
It would be really convenient if the UI theme switched based on whether the system is in light vs. dark mode. Like GitHub does when "theme mode" is set to "Sync with System":
I would argue that this should be the default. (The themes corresponding with light mode and dark mode should still be configurable, but should default to our current "Default Light"/"Default Dark" themes.)
Should be easy enough to detect: https://developer.mozilla.org/en-US/docs/Web/CSS/@media/prefers-color-scheme https://medium.com/hypersphere-codes/detecting-system-theme-in-javascript-css-react-f6b961916d48
I was hesitant to do that right off the bat until we had more soak time with the light theme to make sure we hadn't missed anything crucial.