feat: add background audio player with subtle styling

- Added ReactAudioPlayer component with autoplay functionality and reduced volume (0.1)
- Applied opacity and blur effects to make player visually less intrusive
- Fixed player position to bottom of screen with full width and z-index priority
- Integrated default audio track 'illbe.mp3' from public directory

src/components/ui/AudioPlayer.jsx

@@ -4,11 +4,12 @@ import ReactAudioPlayer from 'react-audio-player';
 
 const AudioPlayer = () => {
   return (
-    <div className="fixed bottom-0 left-0 w-full z-50">
+    <div className="fixed bottom-0 left-0 w-full z-50 opacity-40 blur-xs">
       <ReactAudioPlayer
         src="/audios/illbe.mp3"
         autoPlay
         controls
+        volume={0.1}
         className="w-full"
       />
     </div>