global player pt. 9 fix play track

src/lib/player/player.svelte.ts

@@ -531,6 +531,17 @@ export function insertTrack(track: Track, mode: InsertMode): void {
 	// Normalize + basic guard
 	if (!track || !Number.isFinite(track.id) || !track.src) return;
 
+	// If the user hits "Play" / "Play next" on the *currently playing* track,
+	// treat it as a no-op. This avoids trying to move the current track to
+	// "right after itself" and then skipping, which can produce confusing
+	// queue changes (and in some cases corrupt traversal state).
+	//
+	// NOTE: "Add to queue" still dedupes below, but we early-return there too.
+	if (currentIndex != null && queue[currentIndex]?.id === track.id) {
+		queueNotify();
+		return;
+	}
+
 	// Empty queue behavior
 	if (queue.length === 0) {
 		queue = [track];