Three final UI/UX specs for the collaborative transcription system: - expandable-metadata-header-spec: labeled "Details" toggle with drawer - annotation-transcription-final-spec: annotation-backed transcription with block-level comment threads - transcription-read-mode-final-spec: clean split read mode with flowing prose and scroll sync Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>