global player pt. 9 fix play track pt. 2

src/lib/components/GlobalPlayer.svelte

@@ -171,6 +171,7 @@
 		try {
 			await el.play();
 		} catch {
+			// Autoplay may be blocked; bail out quietly.
 			return;
 		}
 
@@ -278,6 +279,23 @@
 			snap = s;
 		});
 
+		// Listen for play requests dispatched from anywhere (e.g. SongEntry buttons).
+		// This ensures "Play" behaves like Next/Prev: it will reliably sync the new
+		// source and start playback.
+		if (browser) {
+			const onAutoplayRequest = () => {
+				void syncAndAutoplay();
+			};
+			window.addEventListener("amqtrain:player:autoplay", onAutoplayRequest);
+
+			return () => {
+				window.removeEventListener(
+					"amqtrain:player:autoplay",
+					onAutoplayRequest,
+				);
+			};
+		}
+
 		media.setPlaybackState("paused");
 	});