- VoiceWaveform: 80x32 canvas with Web Audio AnalyserNode (fftSize=64), 20 animated bars drawn from frequency data using --primary color
- VoiceMicButton: three visual states — idle (Mic icon), recording (VoiceWaveform + ring-2 ring-primary), processing (Loader2 animate-spin)
- All three states have correct aria-labels per UI spec copywriting contract