Shows a small floating, non-interactive panel while recording with a
segmented VU meter driven by AVAudioRecorder metering (averagePower).
If the input peak stays at silence for >1.2s it turns red and shows
"Nincs hangbemenet?" — surfacing the dead-mic case that previously
produced empty recordings and whisper hallucinations with no feedback.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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