Theme can sync with system

[rainofsilence]

Is your feature request related to a problem? Please describe.
I wanted to change the light and dark theme based on the system settings, but I can't do it now

Describe the solution you'd like
I think the theme can change automatically like the system configuration, or depending on the time of day

Describe alternatives you've considered
I think can also come up with a theme without a background color

Additional context

[rickstaa]

Duplicate of #1001.

[rainofsilence]

Thank you