Dark/Light mode should default to system UI

[njgreb]

The application currently default to light mode. The default theme should be whatever the system is configured to. Post the default being set via the system changes can occur via the icon currently supported or move it all to the Settings page (more of a traditional take).

Platform

• Web (browser + version)
• Android APK (version)
• PWA installed to home screen

Bench version (check the About tab)
v1.7

[njgreb]

I just saw the comment in layout.tsx "A first-time visitor gets light, deliberately".
Options:

1. Updating the landing page to use system theme as well (I like this, but I love dark mode)
2. Only apply this idea to the Android version. No landing page on that platform, no concern.

My opinion would be system default on landing and the app. Toggle button is still two state and "wins". In the apps Setting page let people go between System/Light/Dark.