Could the display theme be account bound?

Edit: What I'm asking below is actually already an option, I guess I'm just bad at reading :-/

As of right now, when you choose a theme, a theme cookie is created which takes a simple string value (white, light, dark or black).

It's straightforward and it works well, but for someone like me who set his browser to delete cookies at the end of his session, it's a little inconvenient to have to go into my settings to set a theme everytime I log on Tildes.

It's a low-priority request, obviously, but maybe you could consider it? I do understand that it makes sense to have it as a cookie since a user may prefer different themes on different devices.

In the meantime I think I'll just write a script to set my theme to black automatically.