fix(linux): restore notification lifecycle

cx

crates/qbz-media-controls/src/notify.rs

@@ -272,9 +272,15 @@ pub async fn show_track_notification(meta: NotificationMeta, offline: bool) {
             .fetch_add(1, Ordering::AcqRel)
             .wrapping_add(1);
 
+        // One stable id intentionally replaces the previous track toast. The
+        // portal normally treats that as an in-place update, which Plasma does
+        // not animate as a new banner after the first track. `show-as-new` is
+        // the portal's explicit contract for a replacement that must be
+        // presented again. It must not be combined with `transient`; stop,
+        // opt-out and shutdown withdraw the replaceable notification below.
         let mut notification = PortalNotification::new(&meta.title)
             .body(Some(body.as_str()))
-            .display_hint([DisplayHint::Transient]);
+            .display_hint([DisplayHint::ShowAsNew]);
 
         if let Some(url) = meta.art_url.clone() {
             let prepared = tokio::task::spawn_blocking(move || -> Result<Vec<u8>, String> {
@@ -299,11 +305,12 @@ pub async fn show_track_notification(meta: NotificationMeta, offline: bool) {
                     log::debug!("[notify] stale track notification discarded");
                     return;
                 }
-                if let Err(e) = proxy
+                match proxy
                     .add_notification(PORTAL_NOTIFICATION_ID, notification)
                     .await
                 {
-                    log::warn!("[notify] XDG portal add_notification failed: {e}");
+                    Ok(()) => log::debug!("[notify] XDG portal notification published"),
+                    Err(e) => log::warn!("[notify] XDG portal add_notification failed: {e}"),
                 }
             }
             Err(e) => log::warn!("[notify] XDG notification portal unavailable: {e}"),

crates/qbz-qt/src/main.rs

@@ -3481,12 +3481,18 @@ fn main() {
         // playing for two seconds longer is a far smaller failure than an app
         // that cannot be closed, so the timeout wins the tie.
         if let Some(rt) = TOKIO.get() {
-            let notification_withdrawn = rt
-                .block_on(tokio::time::timeout(
+            // Construct the timer *inside* the runtime. Building
+            // `tokio::time::timeout` as the argument to `block_on` happens
+            // before the runtime is entered and panics with "no reactor
+            // running" during every normal quit.
+            let notification_withdrawn = rt.block_on(async {
+                tokio::time::timeout(
                     std::time::Duration::from_secs(1),
                     qbz_media_controls::withdraw_track_notification(),
-                ))
-                .is_ok();
+                )
+                .await
+            });
+            let notification_withdrawn = notification_withdrawn.is_ok();
             if !notification_withdrawn {
                 log::warn!(
                     "[qbz-qt] notification withdrawal did not finish within 1s; exiting anyway"