Add segment-based live transcription to voice recorder and in-editor
dictation, wire AUDIO note recording, and add send-to-notebook endpoint
for RAG indexing via open-notebook service.
- Add openNotebookSourceId field to NoteItem schema
- Add POST /api/notes/send-to-notebook proxy route to open-notebook
- Add dictation preview bar with interim speech below editor toolbar
- Rewrite voice recorder with TranscriptSegment-based live rendering
- Convert transcript segments to Tiptap JSON with timestamps on save
- Wire Record button in AUDIO note view with full MediaRecorder flow
- Add Send to Notebook button + Indexed badge in note meta panel
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>