Implement audio player component with HTML5 audio and download functionality

frontend/src/components/AudioPlayerSection.tsx

@@ -0,0 +1,36 @@
+interface AudioPlayerSectionProps {
+  audioUrl: string;
+  onDownload: () => void;
+}
+
+export default function AudioPlayerSection({
+  audioUrl,
+  onDownload
+}: AudioPlayerSectionProps) {
+  return (
+    <div className="w-full max-w-4xl mx-auto p-6">
+      <h2 className="text-2xl font-bold mb-6">Your Audiobook is Ready!</h2>
+      
+      <div className="bg-white rounded-lg shadow-md p-6 mb-6">
+        <h3 className="text-lg font-semibold mb-4">Listen to your audiobook</h3>
+        <audio
+          controls
+          src={audioUrl}
+          className="w-full"
+          preload="metadata"
+        >
+          Your browser does not support the audio element.
+        </audio>
+      </div>
+
+      <div className="flex justify-center">
+        <button
+          onClick={onDownload}
+          className="px-6 py-3 bg-green-600 hover:bg-green-700 text-white font-semibold rounded-lg transition-colors cursor-pointer"
+        >
+          Download audiobook
+        </button>
+      </div>
+    </div>
+  );
+}