- Change default transcription mode from local to byok (cloud/Deepgram)
- Move Transcription Mode selector to top of settings for visibility
- Hide local-only settings (model, VAD, timing) when cloud mode selected
- Disable Start button until API key (byok) or login (managed) is configured
- Add room creation and share code flow to Shared Captions section
- Add POST /api/create-room endpoint to Node.js sync server
- Update default sync URL placeholder to caption.shadowdao.com
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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