Improve startup time (more)
For me, Authenticator is an app that I open every once in a while and then basically close again after a minute. Given that usage profile, it would be great if it could start (even) faster. This has already improved a lot since the Rust rewrite, I think, but in this case shorter is always better.
I imagine part of the overhead of the app is because of the Flatpak dependencies needing initialization. But maybe there's still some other way to eke out a better startup time.