Checklist notes existed (M2) but could only be made by creating a text note and toggling it in the editor — so they were undiscoverable. Now the board's quick-add can make one in one shot. - create endpoint accepts kind + items: POST /api/notes with kind:"list" and items:[...] creates a checklist note and its items atomically. A list note is non-empty when it has a title or ≥1 item. - quick-add gets a checklist toggle (checkbox icon): flip it and each body line becomes an item on save; placeholder switches to "One item per line"; resets to a plain note after close. - notes store create() accepts kind + items; parse_list_items() helper (trims, drops blanks) with a unit test. - title placeholders now read "Title (optional)" in quick-add too. Third item of M4.5. Display/editing of checklists was already built in M2; this closes the creation gap. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01FRgehjoz7Yv8LkUfADxACm