Solves the 'lost window' problem — if the widget gets dragged off-screen
or hidden behind other apps, users can recover it via the tray.
Enables tauri 'tray-icon' feature; tray runs entirely Rust-side so no
new JS capabilities needed.
- cli_usage::default_command now enumerates WSL distros and probes each for
claude before falling back; no more hardcoded -d Ubuntu.
- New autodetect_claude_command Tauri command + IPC binding so the UI knows
whether claude is reachable.
- App.svelte: clear 'Claude Code not found' empty state with install link.
- Real icons: scripts/make-icon.py generates a 1024x1024 source.png; runtime
produces 32/128/256 PNGs and a multi-resolution .ico. README in icons/
explains how to regen.
- README rewritten for friends: install / requirements / troubleshooting on
top; build-from-source moved to bottom.
