fix: update sync timestamp in audio legacy decoder (#1250)

Co-authored-by: Claude <noreply@anthropic.com>

Author: kixelated

js/watch/package.json

@@ -1,7 +1,7 @@
 {
 	"name": "@moq/watch",
 	"type": "module",
-	"version": "0.2.3",
+	"version": "0.2.4",
 	"description": "Watch Media over QUIC broadcasts",
 	"license": "(MIT OR Apache-2.0)",
 	"repository": "github:moq-dev/moq",

js/watch/src/audio/decoder.ts

@@ -228,6 +228,10 @@ export class Decoder {
 				const { frame } = next;
 				if (!frame) continue;
 
+				// Mark that we received this frame right now.
+				const timestamp = Time.Milli.fromMicro(frame.timestamp as Time.Micro);
+				this.source.sync.received(timestamp, "audio");
+
 				this.#stats.update((stats) => ({
 					bytesReceived: (stats?.bytesReceived ?? 0) + frame.data.byteLength,
 				}));