This is super cool. More options is always good. Something that is confusing about the docs though... is there a desktop application? The screenshot implies there is but I couldn't find the docs to download THAT.
There is a Tauri wrapper that I built early on because I wanted the desktop convenience (autostart, separate app, etc) that Firefox+PWA couldn't offer, I use the desktop version as my daily Chatto driver. The mobile build is more of a proof of concept for now. Check it out: https://github.com/teal-bauer/chatto-tauri
It's a really cool project and clearly you put a lot of effort behind it. I like that it's self-hosted and may try it out on my homelab. Thanks for making it!