Split page.tsx from ~2370 to ~1600 lines by extracting:
- NoteWidget: Markdown editor/preview, toolbar, checkbox toggle, all
formatting helpers (bold, italic, lists, links, code)
- CalendarWidget: Month grid, event tooltips, source selection,
next-events list, month navigation
Both components are self-contained with their own state where appropriate
(calendar month navigation, local content edits) while receiving data
and callbacks from the parent.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Claude