Homebrew cask doesn't exist + question about native Rust rewrite

[salmonumbrella]

1. Homebrew cask doesn't exist

brew install --cask rustfava fails:

Warning: Cask 'rustfava' is unavailable: No Cask with this name exists.

The README only lists DMG / PyPI / Docker / Nix, and no tap exists either.

2. Native Rust rewrite — timeline or tracking issue?

In #116 (closed) you mentioned rustfava was always a stopgap, and over in rustledger#300 you said:

Honestly I don't love python and sidecars, it's very hacky. rustfava is really just a bridge for users who are used to fava. I'm planning to write something rust native soon to replace it.

Is there a tracking issue, framework decision (gpui? Tauri? Dioxus?), or rough timeline? Helpful for deciding whether to invest in the sidecar or wait.