useEventDetail.load() early-returned when the event was already in the
store, so arriving from the feed (cached) set up no live subscription.
NIP-52 calendar events are replaceable and the events extension
republishes them when a ticket sells (updating tickets_sold/available),
but with no subscription the detail page never received the update —
counts went stale until a manual reload.
Always open the dTag-scoped subscription (only the one-shot query +
loading state are skipped on a cache hit), and unsubscribe a prior sub
before re-subscribing so reload() can't leak one. The reactive `event`
computed then reflects republished counts without a reload.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
