feat: Integrate Howler.js for audio playback and remove native audio elements

src/server-deno/public/index.html

@@ -7,6 +7,7 @@
   <title>Hitstar Web</title>
   <script src="https://cdn.tailwindcss.com"></script>
   <script src="https://cdn.socket.io/4.7.5/socket.io.min.js"></script>
+  <script src="https://cdnjs.cloudflare.com/ajax/libs/howler/2.2.4/howler.min.js"></script>
   <style>
     @keyframes record-spin {
       from {
@@ -186,7 +187,7 @@
             <div id="revealBanner" class="hidden"></div>
           </div>
           <div class="mt-3">
-            <audio id="audio" preload="none" class="hidden"></audio>
+            <!-- Audio element removed - using Howler.js now -->
             <div class="flex flex-col items-center">
               <!-- Record Disc -->
               <div class="relative" style="width: 200px; height: 200px">