fix: TypeScript - capture Howl ref in closure

lib/sounds.ts

@@ -121,7 +121,7 @@ const howlCache = new Map<string, Howl>();
 export function playSoundUrl(url: string) {
   let h = howlCache.get(url);
   if (!h) {
-    h = new Howl({
+    const newH = new Howl({
       src: [url],
       format: url.endsWith(".mp3") ? ["mp3"] : url.endsWith(".ogg") ? ["ogg"] : ["mp3", "ogg"],
       volume: 0.4,
@@ -130,10 +130,11 @@ export function playSoundUrl(url: string) {
       },
       onplayerror: (_id: number, err: unknown) => {
         console.error("[BaraBingo] Howl play error:", url, err);
-        h.once("unlock", () => h.play());
+        newH.once("unlock", () => newH.play());
       },
     });
-    howlCache.set(url, h);
+    howlCache.set(url, newH);
+    h = newH;
   }
   h.play();
 }