If you took the time to read, it is an optional feature and uses local models.

Then my 'amail' client seems to fit the bill.. (OSS, rust, I use it on Linux and haven't tested elsewhere) ..not really suggesting it – it's pretty barebones and just whatever I've needed, but you're welcome to it obviously! Especially if you have issues/PRs to spur me on to features I've wanted too...

Same here. While I'd rather not have an embedded AI chat window, is there a way to disable it?