[FR] Dark Mode For Indexing Page / Non-White Background

[RC-Projects]

It seems like native browser dark mode doesn't work when loading the index page (DOWNLOAD_DIRS_INDEXABLE feature turned on). The glaring white backround is a bit much at night, especially without a way of changing this. It would be nice if this page by default wasn't white or allowed some type of customerization.

I realize this is most likely an edge case, but hopefully the lift isn't too heavy.