Clarify false positive review comment on event parameter declaration

[Copilot]

Addressed review comment questioning whether event parameter was properly declared in handleAnswerInputChange function.

The automated review incorrectly flagged the event parameter as missing from the function signature. Upon inspection, the function is correctly declared:

function handleAnswerInputChange(event)
{
    // event parameter is properly declared and used throughout
    if (!"abcdefghijklmnopqrstuvwxyz0123456789*/+-^() enter backspace arrowleft arrowright".includes(event.key.toLowerCase()))
    {
        event.preventDefault();
        return;
    }
    // ...
}

No code changes required - clarified that the original implementation was correct.

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