Merge RSVP + slot claim into a single form. Add plus_one field to RSVPs.
Add clickable RSVP names that open a modal to edit name/note/plus_one.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Add migration to clean up duplicate RSVPs (keep earliest per event+name).
Add GetRsvpByName and DeleteDuplicateRsvps queries. Tests cover auto-RSVP
creation, duplicate prevention, and case-insensitive matching.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Ryan Chen