Add a new collapsible panel in meeting-detail page for audio device
management with the following features:
- Device dropdown selector showing all available microphones
- Real-time volume meter using Web Audio API AnalyserNode
- Test recording function (5 seconds max with countdown)
- Test playback function to verify recording quality
- Device hot-plug detection
- Preference persistence in localStorage
- Traditional Chinese localization
The main recording function now uses the user-selected device instead
of auto-selecting, giving users full control over which microphone
to use for meeting transcription.
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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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