Organizers can now cancel events directly from the event list via the
existing PATCH /events/{eventToken} API. The confirmation dialog shows
role-differentiated messaging: "Cancel event?" with a severity warning
for organizers vs. "Remove event?" for attendees. Responses 204, 409,
and 404 all result in successful removal from the local list.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Replace harsh "permanently cancelled" language with friendlier
"The organizer will no longer see you as attending" and rename
buttons from "Cancel attendance" to "Cancel RSVP".
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Allows guests to cancel their RSVP via a DELETE endpoint using their
guestToken. Frontend shows cancel button in RsvpBar and clears local
storage on success. Includes unit tests, integration tests, and E2E spec.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
