fix(frontend): 画面を閉じる直前にAudioContextを閉じるように (#15080)

* fix(frontend): 画面を閉じる直前にAudioContextを閉じるように

* Update Changelog

* Update CHANGELOG.md

---------

Co-authored-by: syuilo <4439005+syuilo@users.noreply.github.com>

packages/frontend/src/scripts/sound.ts

@@ -93,6 +93,10 @@ export async function loadAudio(url: string, options?: { useCache?: boolean; })
 	// eslint-disable-next-line @typescript-eslint/no-unnecessary-condition
 	if (ctx == null) {
 		ctx = new AudioContext();
+
+		window.addEventListener('beforeunload', () => {
+			ctx.close();
+		});
 	}
 	if (options?.useCache ?? true) {
 		if (cache.has(url)) {