Handle Audio Loading Failures Gracefully

When audio files fail to load—such as missing Content‑Length headers—the app may crash, particularly in the Simulator environment. Implement robust error handling to detect and recover from failed audio loads.
Sample:

```swift
audioPlayer.load(from: url) { result in
switch result {
case .success(let player):
player.play()
case .failure(let error):
showAlert("Audio not available: \(error.localizedDescription)")
}
}
```