Introduces BottomSheet and RsvpBar components, integrates the RSVP
submission flow into EventDetailView, extends useEventStorage with
saveRsvp/getRsvp, and adds unit tests plus an E2E spec for the RSVP
workflow.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Form with client-side validation, server error handling, aria-invalid/
aria-describedby for a11y, localStorage persistence via useEventStorage
composable. Routes for /create and /events/:token.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
