feat(slint): Linux system tray (ksni) + Wayland-safe close-to-tray

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

crates/Cargo.lock

@@ -638,7 +638,7 @@ dependencies = [
  "log",
  "num-rational",
  "num-traits",
- "pastey",
+ "pastey 0.1.1",
  "rayon",
  "thiserror 2.0.18",
  "v_frame",
@@ -3432,6 +3432,20 @@ version = "3.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e2db585e1d738fc771bf08a151420d3ed193d9d895a36df7f6f8a9456b911ddc"
 
+[[package]]
+name = "ksni"
+version = "0.3.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a7ca513d0be42df5edb485af9f44a12b2cb85af773d91c27dc796d1c58b78edc"
+dependencies = [
+ "futures-util",
+ "once_cell",
+ "pastey 0.2.3",
+ "serde",
+ "tokio",
+ "zbus 5.15.0",
+]
+
 [[package]]
 name = "kurbo"
 version = "0.13.1"
@@ -4615,6 +4629,12 @@ version = "0.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "35fb2e5f958ec131621fdd531e9fc186ed768cbe395337403ae56c17a74c68ec"
 
+[[package]]
+name = "pastey"
+version = "0.2.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2ee67f1008b1ba2321834326597b8e186293b049a023cdef258527550b9935b4"
+
 [[package]]
 name = "pathdiff"
 version = "0.2.3"
@@ -5283,7 +5303,9 @@ dependencies = [
  "dirs 5.0.1",
  "env_logger",
  "futures-util",
+ "i-slint-backend-winit",
  "image",
+ "ksni",
  "log",
  "open",
  "qbz-app",

crates/qbz-slint/Cargo.toml

@@ -22,6 +22,12 @@ slint = { version = "1.16", default-features = false, features = [
     "accessibility",
     "compat-1-2",
 ] }
+# Direct access to the winit backend for the system tray: WinitWindowAccessor
+# (hide/show the OS window without quitting the event loop) and, later, the
+# CustomApplicationHandler (tray event pump + close-to-tray intercept). MUST be
+# pinned to the exact version Slint resolves (1.16.1) — i-slint-backend-winit
+# does not follow semver, and a mismatch makes with_winit_window() return None.
+i-slint-backend-winit = "=1.16.1"
 log = { workspace = true }
 env_logger = "0.11"
 tokio = { workspace = true }
@@ -53,5 +59,13 @@ rusqlite = { version = "0.31", features = ["bundled"] }
 qbz-cache = { path = "../qbz-cache" }
 qbz-credentials = { path = "../qbz-credentials" }
 
+# Linux system tray via StatusNotifierItem. Same crate + rationale as the
+# Tauri build (src-tauri/Cargo.toml): libayatana-appindicator never dispatches
+# primary-activate (left-click), so we use ksni's pure-Rust SNI which exposes
+# Activate / SecondaryActivate / Scroll. macOS/Windows use `tray-icon` instead
+# (added with the CustomApplicationHandler slice).
+[target.'cfg(target_os = "linux")'.dependencies]
+ksni = { version = "0.3", features = ["blocking"] }
+
 [build-dependencies]
 slint-build = "1.16"

crates/qbz-slint/src/main.rs

@@ -64,6 +64,8 @@ mod settings;
 mod share;
 mod sidebar;
 mod toast;
+mod tray;
+mod tray_settings;
 mod ui_prefs;
 
 use std::sync::Arc;
@@ -94,10 +96,34 @@ async fn enter_shell(
     // settings live in the per-user library.db).
     library_db::set_user(session.user_id);
 
+    // Bind tray settings to this user (per-user tray_settings.db, shared with
+    // the Tauri build) and snapshot them to seed the settings UI.
+    tray_settings::init_for_user(session.user_id);
+    let tray = tray_settings::get();
+
+    // Create the system tray from this user's persisted settings (gated by
+    // enable_tray). Reflects the chosen icon variant. On Linux the ksni
+    // service runs on its own thread; macOS/Windows are no-ops until the
+    // tray-icon slice lands.
+    tray::init(
+        runtime.clone(),
+        weak.clone(),
+        tokio::runtime::Handle::current(),
+        tray.tray_icon_theme.clone(),
+        tray.enable_tray,
+    );
+
     let _ = weak.upgrade_in_event_loop(move |w| {
         let state = w.global::<SessionState>();
         state.set_user_name(session.display_name.into());
         state.set_subscription(session.subscription.into());
+        // Seed the tray settings UI from the persisted per-user store.
+        let appearance = w.global::<AppearanceState>();
+        appearance.set_tray_enable(tray.enable_tray);
+        appearance.set_tray_minimize_to_tray(tray.minimize_to_tray);
+        appearance.set_tray_close_to_tray(tray.close_to_tray);
+        appearance.set_tray_mac_hide_dock(tray.mac_hide_dock);
+        appearance.set_tray_icon_theme_index(tray_settings::icon_theme_index(&tray.tray_icon_theme));
         w.global::<HomeState>().set_loading(true);
         w.set_screen(AppScreen::Shell);
     });
@@ -1751,6 +1777,13 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
         .global::<ShellState>()
         .set_npb_mode(crate::ui_prefs::npb_mode_index(&crate::ui_prefs::load().npb_mode));
 
+    // Tell the tray settings UI which platform it's on so it can show the
+    // macOS-only controls ("Menu Bar" header, hide-Dock toggle) and hide the
+    // Linux/Windows-only minimize-to-tray row.
+    window
+        .global::<AppearanceState>()
+        .set_is_macos(cfg!(target_os = "macos"));
+
     let app_runtime = Arc::new(AppRuntime::new(SlintAdapter::new(window.as_weak())));
 
     // MusicBrainz cache — opens a SQLite store at
@@ -2234,6 +2267,32 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
         });
     }
 
+    // Appearance settings persistence. The toggles/selects set their
+    // AppearanceState property locally, then fire these generic callbacks so
+    // the choice survives restart. Tray keys persist to the shared per-user
+    // tray_settings store; unknown keys are logged (other appearance settings
+    // are wired as they land).
+    {
+        let appearance = window.global::<AppearanceState>();
+        appearance.on_appearance_bool(|key, value| match key.as_str() {
+            "tray-enable" => tray_settings::set_enable_tray(value),
+            "tray-minimize-to-tray" => tray_settings::set_minimize_to_tray(value),
+            "tray-close-to-tray" => tray_settings::set_close_to_tray(value),
+            "tray-mac-hide-dock" => tray_settings::set_mac_hide_dock(value),
+            other => log::debug!("[qbz-slint] unhandled appearance-bool '{other}'"),
+        });
+        appearance.on_appearance_select(|key, index| match key.as_str() {
+            "tray-icon-theme" => {
+                tray_settings::set_icon_theme_index(index);
+                // Re-theme the running tray icon live (no restart).
+                if let Some(t) = tray::handle() {
+                    t.set_icon_theme(tray_settings::theme_for_index(index));
+                }
+            }
+            other => log::debug!("[qbz-slint] unhandled appearance-select '{other}'"),
+        });
+    }
+
     // Context-menu / overlay media actions — route play / queue actions
     // into the playback controller; favorite / download stay logged.
     {
@@ -6557,9 +6616,38 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
             });
     }
 
-    window.on_close_app(|| {
+    window.on_close_app({
+        let weak = window.as_weak();
+        move || {
+            // Custom titlebar close button. Hide to tray when close-to-tray is
+            // enabled and the tray is live; otherwise quit.
+            if tray_settings::get().close_to_tray && tray::handle().is_some() {
+                log::info!("[qbz-slint] close-to-tray (titlebar): hiding to tray");
+                tray::hide_window(&weak);
+            } else {
                 log::info!("[qbz-slint] closing");
                 let _ = slint::quit_event_loop();
+            }
+        }
+    });
+
+    // Intercept the window-manager close (native titlebar X / compositor
+    // close). Mirrors the custom titlebar: hide to tray when close-to-tray is
+    // on + the tray is live, otherwise quit. Required because the loop runs
+    // with quit_on_last_window_closed = false (so a tray-hide keeps the app
+    // alive) — without this, the native close would leave a headless process.
+    window.window().on_close_requested(move || {
+        if tray_settings::get().close_to_tray && tray::handle().is_some() {
+            // Slint performs the hide (destroys the surface) for HideWindow;
+            // we only sync the shown flag so the next tray toggle shows it.
+            log::info!("[qbz-slint] close-to-tray (WM close): hiding to tray");
+            tray::set_window_shown(false);
+            slint::CloseRequestResponse::HideWindow
+        } else {
+            log::info!("[qbz-slint] WM close requested: quitting");
+            let _ = slint::quit_event_loop();
+            slint::CloseRequestResponse::HideWindow
+        }
     });
 
     window.on_open_tos(|| {
@@ -6570,6 +6658,12 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
     });
 
     log::info!("[qbz-slint] window ready");
-    window.run()?;
+    // NOT `window.run()`: that quits the event loop when the last window
+    // closes, which would kill the app the moment the window hides to tray.
+    // `run_event_loop_until_quit()` keeps the loop alive until an explicit
+    // `quit_event_loop()` (custom titlebar / WM close when not close-to-tray /
+    // tray Quit), so hide-to-tray works.
+    window.show()?;
+    slint::run_event_loop_until_quit()?;
     Ok(())
 }

crates/qbz-slint/src/playback.rs

@@ -518,6 +518,10 @@ fn fmt_remaining(position: u64, duration: u64) -> String {
 pub(crate) async fn refresh_now_playing_meta(runtime: &Runtime, weak: &slint::Weak<AppWindow>) {
     let state = runtime.core().get_queue_state().await;
     let Some(track) = state.current_track else {
+        // No current track → clear the tray tooltip (Linux).
+        if let Some(t) = crate::tray::handle() {
+            t.clear_track();
+        }
         let _ = weak.upgrade_in_event_loop(|w| {
             w.global::<NowPlayingState>().set_has_track(false);
         });
@@ -549,6 +553,11 @@ pub(crate) async fn refresh_now_playing_meta(runtime: &Runtime, weak: &slint::We
         crate::quality::detail(track.bit_depth, track.sample_rate)
     };
 
+    // Mirror the now-playing metadata into the system tray tooltip (Linux).
+    if let Some(t) = crate::tray::handle() {
+        t.set_track(title.clone(), artist.clone(), album.clone());
+    }
+
     let _ = weak.upgrade_in_event_loop(move |w| {
         let np = w.global::<NowPlayingState>();
         np.set_has_track(true);
@@ -2393,6 +2402,14 @@ pub fn start_poll_loop(
                 last_track_id = track_id;
                 seen_position = position;
             }
+            // Reflect play/pause into the tray tooltip on transition only
+            // (Linux), so the "Middle-click to pause/play" hint stays correct
+            // without spamming the updater channel every tick.
+            if is_playing != was_playing {
+                if let Some(t) = crate::tray::handle() {
+                    t.set_playing(is_playing);
+                }
+            }
             was_playing = is_playing;
 
             // Auto-advance on track end.

crates/qbz-slint/src/tray/linux.rs

@@ -0,0 +1,482 @@
+//! Linux system tray via `ksni` (StatusNotifierItem).
+//!
+//! Faithful port of `src-tauri/src/tray_linux_ksni.rs`. The icon decoding,
+//! theme resolution, tooltip composition and the updater-thread pattern are
+//! byte-for-byte equivalent. The ONLY behavioural difference: tray actions
+//! drive the playback controller + winit window directly (no webview to emit
+//! events to) — see the `super::dispatch_*` / `super::*_window` helpers.
+
+use std::sync::{
+    mpsc::{self, Sender},
+    Arc, Mutex,
+};
+
+use image::GenericImageView;
+use ksni::{blocking::TrayMethods, menu::StandardItem, Icon, MenuItem, Orientation, ToolTip, Tray};
+
+use super::Runtime;
+use crate::AppWindow;
+
+// Multiple pixmap sizes per StatusNotifierItem spec — panels pick the best
+// match for their bar height (22 = base, 32/44/64 = HiDPI).
+//
+// Legacy filename note (shared with the Tauri assets): `tray-light-*` holds
+// the BLACK glyph (for LIGHT panels) and `tray-dark-*` holds the WHITE glyph.
+// The constants use glyph-colour names so the mapping is explicit.
+const TRAY_ICON_MONO_BLACK_22: &[u8] = include_bytes!("../../icons/tray-light-22.png");
+const TRAY_ICON_MONO_BLACK_32: &[u8] = include_bytes!("../../icons/tray-light-32.png");
+const TRAY_ICON_MONO_BLACK_44: &[u8] = include_bytes!("../../icons/tray-light-44.png");
+const TRAY_ICON_MONO_BLACK_64: &[u8] = include_bytes!("../../icons/tray-light-64.png");
+const TRAY_ICON_MONO_WHITE_22: &[u8] = include_bytes!("../../icons/tray-dark-22.png");
+const TRAY_ICON_MONO_WHITE_32: &[u8] = include_bytes!("../../icons/tray-dark-32.png");
+const TRAY_ICON_MONO_WHITE_44: &[u8] = include_bytes!("../../icons/tray-dark-44.png");
+const TRAY_ICON_MONO_WHITE_64: &[u8] = include_bytes!("../../icons/tray-dark-64.png");
+const TRAY_ICON_COLOR_22: &[u8] = include_bytes!("../../icons/tray-color-22.png");
+const TRAY_ICON_COLOR_32: &[u8] = include_bytes!("../../icons/tray-color-32.png");
+const TRAY_ICON_COLOR_44: &[u8] = include_bytes!("../../icons/tray-color-44.png");
+const TRAY_ICON_COLOR_64: &[u8] = include_bytes!("../../icons/tray-color-64.png");
+
+fn is_flatpak() -> bool {
+    std::env::var("FLATPAK_ID").is_ok() || std::path::Path::new("/.flatpak-info").exists()
+}
+
+/// Detect whether the system prefers a dark color scheme. Tries (in order):
+/// GNOME `color-scheme`, GTK `prefer-dark-theme`, KDE `ColorScheme`. Defaults
+/// to `false` (light) when nothing matches.
+fn prefer_dark_tray() -> bool {
+    if let Ok(out) = std::process::Command::new("gsettings")
+        .args(["get", "org.gnome.desktop.interface", "color-scheme"])
+        .output()
+    {
+        if String::from_utf8_lossy(&out.stdout).contains("prefer-dark") {
+            return true;
+        }
+    }
+    if let Some(config) = dirs::config_dir() {
+        for variant in ["gtk-4.0", "gtk-3.0"] {
+            let path = config.join(variant).join("settings.ini");
+            if let Ok(content) = std::fs::read_to_string(&path) {
+                for line in content.lines() {
+                    if let Some(rest) =
+                        line.trim().strip_prefix("gtk-application-prefer-dark-theme")
+                    {
+                        let v = rest.trim_start_matches(['=', ' ']);
+                        return v.starts_with('1') || v.starts_with("true");
+                    }
+                }
+            }
+        }
+        if let Ok(content) = std::fs::read_to_string(config.join("kdeglobals")) {
+            for line in content.lines() {
+                if let Some(rest) = line.trim().strip_prefix("ColorScheme") {
+                    return rest
+                        .trim_start_matches(['=', ' '])
+                        .to_lowercase()
+                        .contains("dark");
+                }
+            }
+        }
+    }
+    false
+}
+
+/// Convert an embedded RGBA PNG to the ARGB32 big-endian layout ksni expects.
+fn decode_pixmap(bytes: &[u8]) -> Result<Icon, String> {
+    let img = image::load_from_memory(bytes).map_err(|e| format!("decode tray icon: {e}"))?;
+    let (width, height) = img.dimensions();
+    let mut data = img.into_rgba8().into_vec();
+    // ksni spec: ARGB32 with A, R, G, B order per pixel. `image` gives us
+    // RGBA; rotate_right(1) moves the alpha byte from the last slot to the
+    // first.
+    for pixel in data.chunks_exact_mut(4) {
+        pixel.rotate_right(1);
+    }
+    Ok(Icon {
+        width: width as i32,
+        height: height as i32,
+        data,
+    })
+}
+
+#[derive(Clone, Copy, Debug)]
+enum IconVariant {
+    /// Black glyph — for light panels.
+    MonoBlack,
+    /// White glyph — for dark panels (Plasma dark, GNOME top bar).
+    MonoWhite,
+    /// Full color vinyl.
+    Color,
+}
+
+/// Resolve which icon variant to load. `theme_override`:
+///   - "auto" (or unrecognised) — system color-scheme detection
+///   - "mono-light" — white (light-coloured) glyph
+///   - "mono-dark"  — black (dark-coloured) glyph
+///   - "color"      — full vinyl logo
+fn resolve_variant(theme_override: Option<&str>) -> IconVariant {
+    match theme_override {
+        Some("mono-light") => IconVariant::MonoWhite,
+        Some("mono-dark") => IconVariant::MonoBlack,
+        Some("color") => IconVariant::Color,
+        _ => {
+            if prefer_dark_tray() {
+                IconVariant::MonoWhite
+            } else {
+                IconVariant::MonoBlack
+            }
+        }
+    }
+}
+
+/// Decode pixmaps (22/32/44/64) for the resolved variant.
+fn decode_tray_icons(theme_override: Option<&str>) -> Result<Vec<Icon>, String> {
+    let sources: [&[u8]; 4] = match resolve_variant(theme_override) {
+        IconVariant::MonoBlack => [
+            TRAY_ICON_MONO_BLACK_22,
+            TRAY_ICON_MONO_BLACK_32,
+            TRAY_ICON_MONO_BLACK_44,
+            TRAY_ICON_MONO_BLACK_64,
+        ],
+        IconVariant::MonoWhite => [
+            TRAY_ICON_MONO_WHITE_22,
+            TRAY_ICON_MONO_WHITE_32,
+            TRAY_ICON_MONO_WHITE_44,
+            TRAY_ICON_MONO_WHITE_64,
+        ],
+        IconVariant::Color => [
+            TRAY_ICON_COLOR_22,
+            TRAY_ICON_COLOR_32,
+            TRAY_ICON_COLOR_44,
+            TRAY_ICON_COLOR_64,
+        ],
+    };
+    sources.iter().map(|b| decode_pixmap(b)).collect()
+}
+
+/// Now-playing info shown in the tooltip. Cleared when no track is loaded.
+#[derive(Clone, Debug, Default)]
+struct NowPlaying {
+    title: String,
+    artist: String,
+    album: String,
+}
+
+struct QbzTray {
+    runtime: Runtime,
+    weak: slint::Weak<AppWindow>,
+    handle: tokio::runtime::Handle,
+    icons: Vec<Icon>,
+    now_playing: Option<NowPlaying>,
+    is_playing: bool,
+}
+
+impl QbzTray {
+    fn play_pause(&self) {
+        super::dispatch_play_pause(self.runtime.clone(), self.weak.clone(), self.handle.clone());
+    }
+}
+
+impl Tray for QbzTray {
+    fn id(&self) -> String {
+        "com.blitzfc.qbz".into()
+    }
+
+    fn title(&self) -> String {
+        "QBZ".into()
+    }
+
+    fn icon_name(&self) -> String {
+        // Intentionally empty: SNI panels (KDE Plasma especially) prefer
+        // IconName over IconPixmap when both are present, and resolving the
+        // app id against the icon theme picks up the full colour app icon
+        // instead of our themed monochrome glyph (issue #362). An empty name
+        // forces panels to render IconPixmap directly.
+        String::new()
+    }
+
+    fn icon_pixmap(&self) -> Vec<Icon> {
+        self.icons.clone()
+    }
+
+    fn tool_tip(&self) -> ToolTip {
+        let (title, description) = match &self.now_playing {
+            Some(np) => {
+                let header = if np.title.is_empty() {
+                    "QBZ".to_string()
+                } else {
+                    np.title.clone()
+                };
+                let mut lines: Vec<String> = Vec::with_capacity(3);
+                if !np.artist.is_empty() {
+                    lines.push(format!("by {}", np.artist));
+                }
+                if !np.album.is_empty() {
+                    lines.push(np.album.clone());
+                }
+                lines.push(if self.is_playing {
+                    "Middle-click to pause".to_string()
+                } else {
+                    "Middle-click to play".to_string()
+                });
+                lines.push("Scroll to adjust volume".to_string());
+                (header, lines.join("\n"))
+            }
+            None => ("QBZ".to_string(), "Music Player\nNothing playing".to_string()),
+        };
+        ToolTip {
+            title,
+            description,
+            icon_name: String::new(),
+            icon_pixmap: vec![],
+        }
+    }
+
+    /// Primary click (left) — toggle main window visibility.
+    fn activate(&mut self, _x: i32, _y: i32) {
+        log::info!("[tray] primary activate (left click)");
+        super::toggle_window(&self.weak);
+    }
+
+    /// Secondary click (middle) — play/pause.
+    fn secondary_activate(&mut self, _x: i32, _y: i32) {
+        log::info!("[tray] secondary activate (middle click) -> play/pause");
+        self.play_pause();
+    }
+
+    /// Mouse wheel — adjust volume in 5%-per-notch steps. Panels report ±120
+    /// per notch; touch-pad scrolls produce smaller deltas, so we normalise by
+    /// 120 and fall back to `signum()`.
+    fn scroll(&mut self, delta: i32, orientation: Orientation) {
+        if !matches!(orientation, Orientation::Vertical) || delta == 0 {
+            return;
+        }
+        let mut ticks = delta / 120;
+        if ticks == 0 {
+            ticks = delta.signum();
+        }
+        log::debug!("[tray] scroll delta={} ticks={}", delta, ticks);
+        // Positive ticks = wheel-up = volume up.
+        super::dispatch_volume_delta(
+            self.runtime.clone(),
+            self.weak.clone(),
+            self.handle.clone(),
+            ticks,
+        );
+    }
+
+    fn menu(&self) -> Vec<MenuItem<Self>> {
+        vec![
+            StandardItem {
+                label: "Play/Pause".into(),
+                activate: Box::new(|this: &mut Self| this.play_pause()),
+                ..Default::default()
+            }
+            .into(),
+            StandardItem {
+                label: "Next Track".into(),
+                activate: Box::new(|this: &mut Self| {
+                    super::dispatch_next(
+                        this.runtime.clone(),
+                        this.weak.clone(),
+                        this.handle.clone(),
+                    )
+                }),
+                ..Default::default()
+            }
+            .into(),
+            StandardItem {
+                label: "Previous Track".into(),
+                activate: Box::new(|this: &mut Self| {
+                    super::dispatch_previous(
+                        this.runtime.clone(),
+                        this.weak.clone(),
+                        this.handle.clone(),
+                    )
+                }),
+                ..Default::default()
+            }
+            .into(),
+            MenuItem::Separator,
+            StandardItem {
+                label: "Show/Hide Window".into(),
+                activate: Box::new(|this: &mut Self| super::toggle_window(&this.weak)),
+                ..Default::default()
+            }
+            .into(),
+            MenuItem::Separator,
+            StandardItem {
+                label: "Quit QBZ".into(),
+                activate: Box::new(|_this: &mut Self| super::quit()),
+                ..Default::default()
+            }
+            .into(),
+        ]
+    }
+}
+
+/// Updates dispatched from the rest of the app into the ksni worker.
+///
+/// We cannot call `ksni::blocking::Handle::update` directly from a tokio task —
+/// `ksni` 0.3 (`feature = "blocking"`) wraps every update in
+/// `Runtime::block_on`, which panics inside an existing tokio runtime (the
+/// playback poll loop runs on one). The panic is swallowed, so updates appear
+/// to succeed but never apply. We serialise updates over a `std::sync::mpsc`
+/// channel applied from a dedicated `std::thread` outside any tokio context.
+enum TrayUpdate {
+    SetTrack {
+        title: String,
+        artist: String,
+        album: String,
+    },
+    ClearTrack,
+    SetPlaying(bool),
+    /// Re-decode pixmaps for the requested theme override and push them live
+    /// (`NewIcon` SNI signal — panels re-fetch without restart).
+    SetIconTheme(String),
+}
+
+/// Cross-thread handle to the live ksni tray. Cloneable; mutators forward to
+/// the worker thread, safe from any async context. When the tray failed to
+/// start the inner sender stays `None` and every mutator is a no-op.
+#[derive(Clone)]
+pub struct LinuxTrayHandle {
+    sender: Arc<Mutex<Option<Sender<TrayUpdate>>>>,
+}
+
+impl LinuxTrayHandle {
+    fn empty() -> Self {
+        Self {
+            sender: Arc::new(Mutex::new(None)),
+        }
+    }
+
+    fn install(&self, handle: ksni::blocking::Handle<QbzTray>) {
+        let (tx, rx) = mpsc::channel::<TrayUpdate>();
+        std::thread::Builder::new()
+            .name("qbz-tray-updater".into())
+            .spawn(move || {
+                while let Ok(msg) = rx.recv() {
+                    match msg {
+                        TrayUpdate::SetTrack {
+                            title,
+                            artist,
+                            album,
+                        } => {
+                            log::debug!("[tray] tooltip update -> {} / {} / {}", title, artist, album);
+                            handle.update(move |tray| {
+                                tray.now_playing = Some(NowPlaying {
+                                    title,
+                                    artist,
+                                    album,
+                                });
+                            });
+                        }
+                        TrayUpdate::ClearTrack => {
+                            log::debug!("[tray] tooltip cleared");
+                            handle.update(|tray| {
+                                tray.now_playing = None;
+                                tray.is_playing = false;
+                            });
+                        }
+                        TrayUpdate::SetPlaying(is_playing) => {
+                            handle.update(move |tray| {
+                                tray.is_playing = is_playing;
+                            });
+                        }
+                        TrayUpdate::SetIconTheme(theme) => {
+                            log::info!("[tray] icon theme override -> {}", theme);
+                            match decode_tray_icons(Some(&theme)) {
+                                Ok(new_icons) => {
+                                    handle.update(move |tray| {
+                                        tray.icons = new_icons;
+                                    });
+                                }
+                                Err(e) => {
+                                    log::error!(
+                                        "[tray] failed to decode icons for theme '{}': {}",
+                                        theme,
+                                        e
+                                    );
+                                }
+                            }
+                        }
+                    }
+                }
+                log::debug!("[tray] updater thread exiting");
+            })
+            .expect("spawn tray updater thread");
+        if let Ok(mut guard) = self.sender.lock() {
+            *guard = Some(tx);
+        }
+    }
+
+    fn send(&self, msg: TrayUpdate) {
+        let guard = match self.sender.lock() {
+            Ok(g) => g,
+            Err(_) => return,
+        };
+        if let Some(tx) = guard.as_ref() {
+            let _ = tx.send(msg);
+        }
+    }
+
+    pub fn set_track(&self, title: String, artist: String, album: String) {
+        self.send(TrayUpdate::SetTrack {
+            title,
+            artist,
+            album,
+        });
+    }
+
+    pub fn clear_track(&self) {
+        self.send(TrayUpdate::ClearTrack);
+    }
+
+    pub fn set_playing(&self, is_playing: bool) {
+        self.send(TrayUpdate::SetPlaying(is_playing));
+    }
+
+    pub fn set_icon_theme(&self, theme: String) {
+        self.send(TrayUpdate::SetIconTheme(theme));
+    }
+}
+
+/// Initialize the Linux ksni tray service. Spawns a background thread that owns
+/// the SNI service and returns a cloneable handle for live tooltip / theme
+/// updates. `theme_override`: "auto"/"mono-light"/"mono-dark"/"color".
+pub fn init(
+    runtime: Runtime,
+    weak: slint::Weak<AppWindow>,
+    handle: tokio::runtime::Handle,
+    theme_override: &str,
+) -> Result<LinuxTrayHandle, Box<dyn std::error::Error>> {
+    log::info!(
+        "Initializing ksni tray (Linux, SNI primary-activate enabled, theme={:?})",
+        theme_override
+    );
+
+    let icons = decode_tray_icons(Some(theme_override))?;
+    let tray = QbzTray {
+        runtime,
+        weak,
+        handle,
+        icons,
+        now_playing: None,
+        is_playing: false,
+    };
+
+    // Flatpak requires disabling the well-known DBus name because the sandbox
+    // cannot own arbitrary bus names.
+    let ksni_handle = if is_flatpak() {
+        log::info!("[tray] Flatpak detected — spawning ksni without DBus well-known name");
+        tray.disable_dbus_name(true).spawn()?
+    } else {
+        tray.spawn()?
+    };
+
+    let live = LinuxTrayHandle::empty();
+    live.install(ksni_handle);
+
+    log::info!("ksni tray initialized");
+    Ok(live)
+}

crates/qbz-slint/src/tray/mod.rs

@@ -0,0 +1,286 @@
+//! System tray for the Slint app.
+//!
+//! Faithful port of the Tauri tray (`src-tauri/src/tray.rs` +
+//! `src-tauri/src/tray_linux_ksni.rs`). Platform split, same as Tauri:
+//!   - **Linux** → `ksni` / StatusNotifierItem (`linux` submodule). Tauri's
+//!     libayatana path never dispatches primary-activate (left-click); ksni
+//!     exposes Activate / SecondaryActivate / Scroll (issue #310).
+//!   - **macOS / Windows** → `tray-icon` (added with the
+//!     CustomApplicationHandler slice). Until then, a no-op on those targets.
+//!
+//! Tray actions differ from Tauri in ONE way: there is no webview to emit
+//! events to, so play/pause/next/previous/volume call the playback controller
+//! directly (mirroring the now-playing bar's QConnect-aware dispatch) and
+//! show/hide toggles the winit window in place.
+
+use std::sync::atomic::{AtomicBool, Ordering};
+use std::sync::Arc;
+
+use slint::ComponentHandle;
+
+use crate::adapter::SlintAdapter;
+use crate::AppWindow;
+use qbz_app::shell::AppRuntime;
+
+#[cfg(target_os = "linux")]
+mod linux;
+
+/// Shared runtime handle type used across the Slint app.
+pub(crate) type Runtime = Arc<AppRuntime<SlintAdapter>>;
+
+/// Whether the main window is currently shown. The tray toggle and (later)
+/// close-to-tray both flip this so left-click / "Show/Hide" stay consistent
+/// even on backends where querying winit visibility is unreliable (Wayland).
+static WINDOW_SHOWN: AtomicBool = AtomicBool::new(true);
+
+/// Cross-thread handle to the live tray. Cloneable; mutators forward to the
+/// platform backend (ksni on Linux) and are no-ops when the tray is disabled
+/// or on a platform without a live-update path.
+#[derive(Clone, Default)]
+pub struct TrayHandle {
+    #[cfg(target_os = "linux")]
+    linux: Option<linux::LinuxTrayHandle>,
+}
+
+impl TrayHandle {
+    pub fn set_track(&self, title: String, artist: String, album: String) {
+        #[cfg(target_os = "linux")]
+        if let Some(h) = &self.linux {
+            h.set_track(title, artist, album);
+            return;
+        }
+        #[cfg(not(target_os = "linux"))]
+        let _ = (title, artist, album);
+    }
+
+    pub fn clear_track(&self) {
+        #[cfg(target_os = "linux")]
+        if let Some(h) = &self.linux {
+            h.clear_track();
+        }
+    }
+
+    pub fn set_playing(&self, is_playing: bool) {
+        #[cfg(target_os = "linux")]
+        if let Some(h) = &self.linux {
+            h.set_playing(is_playing);
+            return;
+        }
+        #[cfg(not(target_os = "linux"))]
+        let _ = is_playing;
+    }
+
+    pub fn set_icon_theme(&self, theme: String) {
+        #[cfg(target_os = "linux")]
+        if let Some(h) = &self.linux {
+            h.set_icon_theme(theme);
+            return;
+        }
+        #[cfg(not(target_os = "linux"))]
+        let _ = theme;
+    }
+}
+
+/// Process-global tray handle, set once by `init`. `None` until the tray is
+/// created (or forever, if disabled / unsupported platform).
+static TRAY: std::sync::OnceLock<TrayHandle> = std::sync::OnceLock::new();
+
+/// The live tray handle, if the tray was initialized. Callers (playback poll
+/// loop, settings) use this to push tooltip / theme updates.
+pub fn handle() -> Option<&'static TrayHandle> {
+    TRAY.get()
+}
+
+/// Initialize the system tray, gated by the user's `enable_tray` setting.
+/// `theme_override` is the persisted `tray_icon_theme` ("auto"/"mono-light"/
+/// "mono-dark"/"color"). No-op when disabled or already initialized.
+pub fn init(
+    runtime: Runtime,
+    weak: slint::Weak<AppWindow>,
+    handle: tokio::runtime::Handle,
+    theme_override: String,
+    enabled: bool,
+) {
+    if !enabled {
+        log::info!("[tray] disabled by user setting");
+        return;
+    }
+    if TRAY.get().is_some() {
+        return;
+    }
+
+    #[cfg(target_os = "linux")]
+    {
+        // ksni's blocking `spawn()` calls `Runtime::block_on` internally, which
+        // panics inside an existing tokio runtime (`init` is called from the
+        // tokio-based shell-entry task). Run the ksni setup on a dedicated
+        // std::thread, outside any tokio context (the Tauri build is safe
+        // because it inits from the non-tokio Tauri setup hook). The ksni
+        // service + updater thread persist independently; this thread exits.
+        std::thread::Builder::new()
+            .name("qbz-tray-init".into())
+            .spawn(move || match linux::init(runtime, weak, handle, &theme_override) {
+                Ok(linux_handle) => {
+                    let _ = TRAY.set(TrayHandle {
+                        linux: Some(linux_handle),
+                    });
+                }
+                Err(e) => log::error!("[tray] Linux tray init failed: {e}"),
+            })
+            .expect("spawn tray init thread");
+    }
+
+    #[cfg(not(target_os = "linux"))]
+    {
+        // macOS / Windows tray lands with the CustomApplicationHandler slice.
+        let _ = (runtime, weak, handle, theme_override);
+        log::info!("[tray] no tray backend on this platform yet");
+    }
+}
+
+// ---------------------------------------------------------------------------
+// Window show/hide — used by left-click, the "Show/Hide" menu item, and
+// close-to-tray. Uses Slint's own `hide()`/`show()` (NOT winit `set_visible`,
+// which is a no-op on Wayland): since Slint 1.7 `hide()` destroys the winit
+// surface on Wayland and `show()` recreates it (PR slint-ui/slint#5529), the
+// only path that actually works on KWin Wayland. The app survives a hidden
+// window because main() runs the loop via `run_event_loop_until_quit()`
+// (quit_on_last_window_closed = false).
+// ---------------------------------------------------------------------------
+
+/// Toggle the main window: hide if shown, else show + focus.
+pub(crate) fn toggle_window(weak: &slint::Weak<AppWindow>) {
+    if WINDOW_SHOWN.load(Ordering::Relaxed) {
+        hide_window(weak);
+    } else {
+        show_window(weak);
+    }
+}
+
+/// Show the main window (recreates the Wayland surface) and focus it.
+pub(crate) fn show_window(weak: &slint::Weak<AppWindow>) {
+    WINDOW_SHOWN.store(true, Ordering::Relaxed);
+    let _ = weak.upgrade_in_event_loop(|w| {
+        if let Err(e) = w.show() {
+            log::error!("[tray] window show failed: {e}");
+        }
+        // Best-effort raise/focus the re-created window (the compositor has
+        // the final say on Wayland).
+        use i_slint_backend_winit::WinitWindowAccessor;
+        w.window().with_winit_window(|win| {
+            win.focus_window();
+        });
+    });
+}
+
+/// Hide the main window to the tray (surface destroyed; the process keeps
+/// running, the ksni service stays alive on its own thread).
+pub(crate) fn hide_window(weak: &slint::Weak<AppWindow>) {
+    WINDOW_SHOWN.store(false, Ordering::Relaxed);
+    let _ = weak.upgrade_in_event_loop(|w| {
+        if let Err(e) = w.hide() {
+            log::error!("[tray] window hide failed: {e}");
+        }
+    });
+}
+
+/// Sync the shown-state flag without touching the window — used when Slint
+/// itself performs the hide (e.g. an `on_close_requested` → `HideWindow`
+/// response) so the next tray toggle knows to show.
+pub(crate) fn set_window_shown(shown: bool) {
+    WINDOW_SHOWN.store(shown, Ordering::Relaxed);
+}
+
+/// Quit the whole app from a tray action (any thread).
+pub(crate) fn quit() {
+    log::info!("[tray] quit requested");
+    let _ = slint::invoke_from_event_loop(|| {
+        let _ = slint::quit_event_loop();
+    });
+}
+
+// ---------------------------------------------------------------------------
+// Player-action dispatch — mirrors the now-playing bar's QConnect-aware
+// handlers (main.rs on_toggle_play / on_next / on_previous) so the tray drives
+// the exact same path: try the remote renderer first, else local playback.
+// ---------------------------------------------------------------------------
+
+pub(crate) fn dispatch_play_pause(
+    runtime: Runtime,
+    weak: slint::Weak<AppWindow>,
+    handle: tokio::runtime::Handle,
+) {
+    let spawn_handle = handle.clone();
+    handle.spawn(async move {
+        if let Some(svc) = crate::qconnect_service::service() {
+            match svc.toggle_remote_renderer_playback_if_active().await {
+                Ok(true) => return,
+                Ok(false) => {}
+                Err(e) => {
+                    log::warn!("[tray] play_pause handoff: {e}");
+                    return;
+                }
+            }
+        }
+        crate::playback::toggle_play_pause(runtime, weak, spawn_handle);
+    });
+}
+
+pub(crate) fn dispatch_next(
+    runtime: Runtime,
+    weak: slint::Weak<AppWindow>,
+    handle: tokio::runtime::Handle,
+) {
+    let spawn_handle = handle.clone();
+    handle.spawn(async move {
+        if let Some(svc) = crate::qconnect_service::service() {
+            match svc.skip_next_if_remote().await {
+                Ok(true) => return,
+                Ok(false) => {}
+                Err(e) => {
+                    log::warn!("[tray] next handoff: {e}");
+                    return;
+                }
+            }
+        }
+        crate::playback::next(runtime, weak, spawn_handle);
+    });
+}
+
+pub(crate) fn dispatch_previous(
+    runtime: Runtime,
+    weak: slint::Weak<AppWindow>,
+    handle: tokio::runtime::Handle,
+) {
+    let spawn_handle = handle.clone();
+    handle.spawn(async move {
+        if let Some(svc) = crate::qconnect_service::service() {
+            match svc.skip_previous_if_remote().await {
+                Ok(true) => return,
+                Ok(false) => {}
+                Err(e) => {
+                    log::warn!("[tray] previous handoff: {e}");
+                    return;
+                }
+            }
+        }
+        crate::playback::previous(runtime, weak, spawn_handle);
+    });
+}
+
+/// Step the local volume by `ticks` notches of 5% (positive = up). Mirrors the
+/// Tauri `tray:volume_delta` handler. Local-only for now (remote-renderer
+/// volume forwarding is a later refinement).
+pub(crate) fn dispatch_volume_delta(
+    runtime: Runtime,
+    weak: slint::Weak<AppWindow>,
+    handle: tokio::runtime::Handle,
+    ticks: i32,
+) {
+    let spawn_handle = handle.clone();
+    handle.spawn(async move {
+        let current = runtime.core().player().get_playback_event().volume;
+        let next = (current + ticks as f32 * 0.05).clamp(0.0, 1.0);
+        crate::playback::set_volume(runtime, weak, spawn_handle, next);
+    });
+}

crates/qbz-slint/src/tray_settings.rs

@@ -0,0 +1,129 @@
+//! Slint-side glue for tray preferences.
+//!
+//! The persisted model + SQLite store live in the shared, frontend-agnostic
+//! `qbz_app::settings::tray` module (ADR-006). This module only owns a
+//! process-global handle to that store, bound to the active user the same way
+//! `library_db` binds the per-user `library.db`:
+//!
+//!   <data_dir>/qbz/users/<user_id>/tray_settings.db
+//!
+//! so the Slint and Tauri builds share the exact same per-user tray settings
+//! and the same `normalize_tray_icon_theme` semantics. Runtime tray creation,
+//! icon updates and window hide/show live elsewhere (the `tray` module).
+
+use std::path::PathBuf;
+use std::sync::LazyLock;
+
+pub use qbz_app::settings::tray::{normalize_tray_icon_theme, TraySettings};
+use qbz_app::settings::tray::TraySettingsState;
+
+/// Process-global tray settings handle. Starts session-less (`new_empty`);
+/// `init_for_user` binds it to the per-user DB on shell entry.
+static STATE: LazyLock<TraySettingsState> = LazyLock::new(TraySettingsState::new_empty);
+
+/// The on-screen order of the tray icon variant dropdown
+/// (`AppearanceState.tray-icon-themes`): Auto / Mono light / Mono dark / Color.
+/// Indices map to the canonical `tray_icon_theme` string values.
+const THEME_BY_INDEX: [&str; 4] = ["auto", "mono-light", "mono-dark", "color"];
+
+/// `<data_dir>/qbz/users/<user_id>/` — the per-user directory the shared
+/// store appends `tray_settings.db` to. Matches the Tauri per-user path.
+fn user_dir(user_id: u64) -> Option<PathBuf> {
+    Some(
+        dirs::data_dir()?
+            .join("qbz")
+            .join("users")
+            .join(user_id.to_string()),
+    )
+}
+
+/// Bind the store to `user_id` on shell entry. Best-effort — failures are
+/// logged and leave the store session-less (settings degrade to defaults).
+pub fn init_for_user(user_id: u64) {
+    let Some(dir) = user_dir(user_id) else {
+        log::warn!("[qbz-slint] tray settings: data dir unavailable, not initialized");
+        return;
+    };
+    if let Err(e) = STATE.init_at(&dir) {
+        log::error!("[qbz-slint] tray settings init failed: {e}");
+    }
+}
+
+/// Current persisted settings, or `TraySettings::default()` when there is no
+/// active session / the read fails.
+pub fn get() -> TraySettings {
+    STATE.get_settings().unwrap_or_default()
+}
+
+pub fn set_enable_tray(value: bool) {
+    if let Err(e) = STATE.set_enable_tray(value) {
+        log::error!("[qbz-slint] tray settings set_enable_tray failed: {e}");
+    }
+}
+
+pub fn set_minimize_to_tray(value: bool) {
+    if let Err(e) = STATE.set_minimize_to_tray(value) {
+        log::error!("[qbz-slint] tray settings set_minimize_to_tray failed: {e}");
+    }
+}
+
+pub fn set_close_to_tray(value: bool) {
+    if let Err(e) = STATE.set_close_to_tray(value) {
+        log::error!("[qbz-slint] tray settings set_close_to_tray failed: {e}");
+    }
+}
+
+pub fn set_mac_hide_dock(value: bool) {
+    if let Err(e) = STATE.set_mac_hide_dock(value) {
+        log::error!("[qbz-slint] tray settings set_mac_hide_dock failed: {e}");
+    }
+}
+
+/// Persist the tray icon variant from the dropdown index (0..=3). Out-of-range
+/// indices fall back to `"auto"`.
+pub fn set_icon_theme_index(index: i32) {
+    let theme = THEME_BY_INDEX
+        .get(usize::try_from(index).unwrap_or(0))
+        .copied()
+        .unwrap_or("auto");
+    if let Err(e) = STATE.set_tray_icon_theme(theme) {
+        log::error!("[qbz-slint] tray settings set_tray_icon_theme failed: {e}");
+    }
+}
+
+/// Canonical theme string for a dropdown index (0..=3). Out-of-range → "auto".
+/// Used to push the live `set_icon_theme` to the running tray.
+pub fn theme_for_index(index: i32) -> String {
+    THEME_BY_INDEX
+        .get(usize::try_from(index).unwrap_or(0))
+        .copied()
+        .unwrap_or("auto")
+        .to_string()
+}
+
+/// Dropdown index (0..=3) for a canonical theme string. Unknown → 0 (Auto).
+pub fn icon_theme_index(theme: &str) -> i32 {
+    let normalized = normalize_tray_icon_theme(theme);
+    THEME_BY_INDEX
+        .iter()
+        .position(|t| *t == normalized)
+        .map(|i| i as i32)
+        .unwrap_or(0)
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn index_round_trips_canonical_values() {
+        assert_eq!(icon_theme_index("auto"), 0);
+        assert_eq!(icon_theme_index("mono-light"), 1);
+        assert_eq!(icon_theme_index("mono-dark"), 2);
+        assert_eq!(icon_theme_index("color"), 3);
+        // Legacy + unknown normalize before lookup.
+        assert_eq!(icon_theme_index("light"), 1);
+        assert_eq!(icon_theme_index("dark"), 2);
+        assert_eq!(icon_theme_index("bogus"), 0);
+    }
+}

crates/qbz-slint/ui/app.slint

@@ -18,7 +18,7 @@ import { AppShell } from "shell/AppShell.slint";
 import { Toast } from "primitives/Toast.slint";
 
 // Re-export the state globals so the Rust layer can populate them.
-export { HomeState, HomeActions, DiscoverBrowseState, DiscoverBrowseActions, ForYouState, MixState, GenreFilterState, GenreFilterActions, AlbumState, ArtistState, NavState, ShellState, SessionState, SettingsState, AlbumActions, ArtistActions, ArtworkActions, NowPlayingState, QueueState, SearchState, SearchActions, NetworkSidebarState, NetworkSidebarActions, MusicianState, MusicianActions, LabelState, LabelActions, LocationViewState, LocationViewActions, FavoritesState, FavoritesActions, PlaylistPickerState, PlaylistPickerActions, PlaylistState, PlaylistActions, SidebarState, SidebarActions, SidebarFolderPopupState, CreatePlaylistState, CreatePlaylistActions, EditPlaylistState, EditPlaylistActions, CreateFolderState, CreateFolderActions, DragState, DragActions, PlaylistManagerState, PlaylistManagerActions, OfflineManagerState, OfflineManagerActions, LocalLibraryState, LocalLibraryActions, LibraryFoldersState, LibFolderEditState, LibraryManageActions, LibraryScanState, LibAlbumFilterState, LocalAlbumState, LocalAlbumActions, TagEditorState, TagEditorActions, FolderEditState, FolderEditActions, ToastState, TextUtil, QconnectDevState, QconnectDevice } from "state.slint";
+export { HomeState, HomeActions, DiscoverBrowseState, DiscoverBrowseActions, ForYouState, MixState, GenreFilterState, GenreFilterActions, AlbumState, ArtistState, NavState, ShellState, SessionState, SettingsState, AlbumActions, ArtistActions, ArtworkActions, NowPlayingState, QueueState, SearchState, SearchActions, NetworkSidebarState, NetworkSidebarActions, MusicianState, MusicianActions, LabelState, LabelActions, LocationViewState, LocationViewActions, FavoritesState, FavoritesActions, PlaylistPickerState, PlaylistPickerActions, PlaylistState, PlaylistActions, SidebarState, SidebarActions, SidebarFolderPopupState, CreatePlaylistState, CreatePlaylistActions, EditPlaylistState, EditPlaylistActions, CreateFolderState, CreateFolderActions, DragState, DragActions, PlaylistManagerState, PlaylistManagerActions, OfflineManagerState, OfflineManagerActions, LocalLibraryState, LocalLibraryActions, LibraryFoldersState, LibFolderEditState, LibraryManageActions, LibraryScanState, LibAlbumFilterState, LocalAlbumState, LocalAlbumActions, TagEditorState, TagEditorActions, FolderEditState, FolderEditActions, ToastState, TextUtil, QconnectDevState, QconnectDevice, AppearanceState } from "state.slint";
 
 // Which top-level screen is shown. The app starts on `splash` while it
 // restores a saved session, then resolves to `shell` or `login`.

crates/qbz-slint/ui/settings/AppearanceSettings.slint

@@ -700,12 +700,11 @@ export component AppearanceSettings inherits VerticalLayout {
     Rectangle { height: 12px; }
 
     // ===================================================================
-    // SYSTEM TRAY
+    // SYSTEM TRAY  (macOS: "MENU BAR")
     // ===================================================================
-    GroupHeader { text: @tr("SYSTEM TRAY"); }
+    GroupHeader { text: AppearanceState.is-macos ? @tr("MENU BAR") : @tr("SYSTEM TRAY"); }
 
     SettingRow {
-        unsupported: true;
         label: @tr("Enable tray icon");
         description: @tr("Show icon in system tray (requires restart)");
         QbzToggle {
@@ -716,24 +715,18 @@ export component AppearanceSettings inherits VerticalLayout {
             }
         }
     }
+    // NOTE: a separate "Minimize to tray" toggle is intentionally absent.
+    // Redirecting the window-manager minimize button to the tray requires
+    // owning that button (custom window chrome), which is not built yet, and
+    // Wayland forbids a client from intercepting the compositor's minimize.
+    // Until custom chrome lands, the option is HIDDEN (not shown disabled) and
+    // this row reads "Close to tray". When custom chrome exists, merge the two
+    // into a single "Minimize/Close to tray" control.
     SettingRow {
-        unsupported: true;
-        label: @tr("Minimize to tray");
-        description: @tr("Hide window to tray when minimizing");
-        enabled: AppearanceState.tray-enable;
-        QbzToggle {
-            checked: AppearanceState.tray-minimize-to-tray;
-            enabled: AppearanceState.tray-enable;
-            toggled(v) => {
-                AppearanceState.tray-minimize-to-tray = v;
-                AppearanceState.appearance-bool("tray-minimize-to-tray", v);
-            }
-        }
-    }
-    SettingRow {
-        unsupported: true;
         label: @tr("Close to tray");
-        description: @tr("Hide window to tray instead of quitting");
+        description: AppearanceState.is-macos
+            ? @tr("Keep playing in the menu bar instead of quitting when you close the window")
+            : @tr("Keep playing in the tray instead of quitting when you close the window");
         enabled: AppearanceState.tray-enable;
         QbzToggle {
             checked: AppearanceState.tray-close-to-tray;
@@ -744,8 +737,23 @@ export component AppearanceSettings inherits VerticalLayout {
             }
         }
     }
+    // macOS-only: switch the activation policy to .accessory while closed to
+    // the menu bar (no Dock icon). Off = Spotify-style (keep the Dock icon).
+    SettingRow {
+        visible: AppearanceState.is-macos;
+        label: @tr("Hide Dock icon when closed to menu bar");
+        description: @tr("Run as a menu-bar-only app while the window is closed. Off keeps the Dock icon (like Spotify)");
+        enabled: AppearanceState.tray-enable && AppearanceState.tray-close-to-tray;
+        QbzToggle {
+            checked: AppearanceState.tray-mac-hide-dock;
+            enabled: AppearanceState.tray-enable && AppearanceState.tray-close-to-tray;
+            toggled(v) => {
+                AppearanceState.tray-mac-hide-dock = v;
+                AppearanceState.appearance-bool("tray-mac-hide-dock", v);
+            }
+        }
+    }
     SettingRow {
-        unsupported: true;
         label: @tr("Tray icon variant");
         description: @tr("Pick a mono glyph to match your panel (Plasma, GNOME's permanently dark top bar) or the full colour vinyl logo");
         QbzSelect {

crates/qbz-slint/ui/state.slint

@@ -1432,9 +1432,15 @@ export global AppearanceState {
     in-out property <bool> show-purchases: false;
 
     // --- SYSTEM TRAY -------------------------------------------------------
+    // `is-macos` is set once from Rust (cfg!(target_os = "macos")) so the tray
+    // section can swap the header to "Menu Bar" and show macOS-only controls.
+    in-out property <bool> is-macos: false;
     in-out property <bool> tray-enable: true;
     in-out property <bool> tray-minimize-to-tray: false;
     in-out property <bool> tray-close-to-tray: false;
+    // macOS-only: hide the Dock icon when closed to the menu bar (.accessory
+    // activation policy). Off = Spotify-style (keep the Dock icon).
+    in-out property <bool> tray-mac-hide-dock: false;
     in-out property <[string]> tray-icon-themes: ["Auto", "Mono light", "Mono dark", "Color"];
     in-out property <int> tray-icon-theme-index: 0;