Rust Async Patterns in Tauri — Keeping the UI Responsive While Rust Does Heavy Work

If this is useful, a ❤️ helps others find it. All tests run on an 8-year-old MacBook Air. A Tauri app has two threads that matter: the main thread (UI) and whatever tokio spawns. Block the main thread and the UI freezes. Block for too long in a command and the frontend times out. Here's how I keep t