Port the Tauri tray to Slint on Linux via ksni: themed icon (auto/mono/
color), left-click window toggle, middle-click play/pause, scroll volume,
the 5-item menu, and a live tooltip reflecting the now-playing track. Tray
actions call the playback controller directly (QConnect-aware) instead of
emitting webview events. Settings reuse the shared qbz-app tray store
(per-user) wired through AppearanceState.
Window hide/show uses Slint window.hide()/show() (winit set_visible is a
no-op on Wayland) and the loop runs via run_event_loop_until_quit so a
tray-hide keeps the app alive. close-to-tray is honored on both the custom
titlebar close and the WM close (on_close_requested). minimize-to-tray is
hidden until custom window chrome exists.
cc
vicrodh
8a78c2250f