refactor(audio-player): cache audioRef.current to avoid repeated access to the 'current' property

[alamenai]

What

In the current implementation of useAnimationFrame, we have repeated access to the audioRef.current to update the states.

In the new changes, I cached the reference in a variable ( const ) and reuse it without duplication. In addition to that, I used the guard clause pattern to check the audio reference.

Why

1. Remove redundancy reference access.

Additional

We can also use object destructuring to extract the properties from audio to avoid ( but also check before set ) redundancy. Let me know if you prefer this pattern to follow up with a commit.

[vercel]

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