Reader theme should offer a "System" option (follow device dark/light mode), like the main UI already does

[Richouu]

What would you like Grimmory to do?

Add a "System" option to the reader theme settings (EPUB reader) in addition to the current Light/Dark choices — mirroring the "System" color scheme option that the main Grimmory UI already offers. When selected, the reader would resolve to light or dark from the device's prefers-color-scheme, and ideally react live to changes via a matchMedia('(prefers-color-scheme: dark)') listener, so the reader flips automatically when the device switches modes (e.g. scheduled dark mode at sunset while reading).

What problem does this solve for you?

I use Grimmory as an installed web app on iPhone/iPad, and it's my daily reading app. The main UI already follows my device's dark/light mode nicely, but the readers keep a fixed theme I end up with a white reader at night or a dark reader in daylight, unless I manually change the reader setting twice a day.

A "System" option would make the whole app consistent (the UI half already behaves this way) and remove the daily friction for anyone reading on a phone or tablet with automatic dark mode. Happy to test, and I can attempt a PR if that helps.

Anything else?

No response

Want to help out?

Yes! I'd love to help implement this

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