stop the now playing title flickering on every track change

The title effect was keyed on both the queue context and the per-track fallback
(album name), so advancing a track reset the resolved playlist/album name to the
album fallback until the async lookup returned. Key only on the queue context;
`remember(queueContext)` already resets it synchronously when the context changes.

app/src/main/kotlin/com/subtracks/ui/playback/NowPlayingScreen.kt

@@ -92,9 +92,8 @@ fun NowPlayingRoute(
         } else {
             state.item?.album?.takeIf { it.isNotBlank() } ?: "Library"
         }
-    val sourceTitle = remember(queueContext, fallbackTitle) { mutableStateOf(fallbackTitle) }
-    LaunchedEffect(queueContext, fallbackTitle) {
-        sourceTitle.value = fallbackTitle
+    val sourceTitle = remember(queueContext) { mutableStateOf(fallbackTitle) }
+    LaunchedEffect(queueContext) {
         sourceTitle.value = controller.sourceTitle(queueContext)?.takeIf { it.isNotBlank() } ?: fallbackTitle
     }
     LaunchedEffect(state.item?.id, state.hasNext) {