Add event list feature (009-list-events)

Enable users to see all their saved events on the home screen, sorted
by date with upcoming events first. Key capabilities:

- EventCard with title, relative time display, and organizer/attendee
  role badge
- Sortable EventList with past-event visual distinction (faded style)
- Empty state when no events are stored
- Swipe-to-delete gesture with confirmation dialog
- Floating action button for quick event creation
- Rename router param :token → :eventToken across all views
- useRelativeTime composable (Intl.RelativeTimeFormat)
- useEventStorage: add validation, removeEvent(), reactive versioning
- Full E2E and unit test coverage for all new components

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

frontend/src/views/EventDetailView.vue

@@ -131,7 +131,7 @@ async function fetchEvent() {
 
   try {
     const { data, error, response } = await api.GET('/events/{token}', {
-      params: { path: { token: route.params.token as string } },
+      params: { path: { token: route.params.eventToken as string } },
     })
 
     if (error) {
@@ -173,7 +173,7 @@ async function submitRsvp() {
 
   try {
     const { data, error } = await api.POST('/events/{token}/rsvps', {
-      params: { path: { token: route.params.token as string } },
+      params: { path: { token: route.params.eventToken as string } },
       body: { name: nameInput.value },
     })