EditEventPage: stop stripping unmanaged tags on edit (linked spots/crews, entry fee, Pro listing) (1.2.29)

Calendar events (NIP-52 kind 31923) are addressable, so re-publishing replaces
the entire tag set. The edit form only rebuilt the handful of fields it exposes
(title/start/end/location/geohash/types/image) plus sponsor tags. Everything
else a CreateEventPage event can carry was silently dropped on any edit:
  - linked spot / crew host / tour / musician `a` refs + their readable
    name/category tags (spot-name, crew-name, tour-name, music-act, …)
  - entry-fee and the 'paid' topic tag
  - the paid 'featured' (Pro) listing the organiser may have bought

So a founder editing their event's start time would lose the crew-host link,
the entry fee, and their Pro featured status — real, paid-for data loss.

Fix: after rebuilding the managed fields, carry through every OTHER tag from
the original event untouched. `t` (topic) tags are handled specially — the
form fully owns 'skateboarding' + selected types, but foreign topics like
'paid' are preserved. Replaces the narrow sponsor-only passthrough.

Audit note: CrewForm (create + edit) and EditSpotPage were reviewed in the
same pass and correctly reuse their identifier / preserve state — no changes
needed there. Crews are intentionally many-per-user (timestamped identifier),
so re-creating is by design, not a clobber.

Co-authored-by: shakespeare.diy <assistant@shakespeare.diy>

package.json

@@ -1,7 +1,7 @@
 {
   "name": "skate-spots",
   "private": true,
-  "version": "1.2.28",
+  "version": "1.2.29",
   "type": "module",
   "homepage": "https://skate-spots.com",
   "scripts": {

src/pages/EditEventPage.tsx

@@ -289,10 +289,26 @@ export default function EditEventPage() {
         tags.push(['image', image]);
       }
 
-      // Preserve sponsors from the original event (the edit form doesn't manage
-      // them yet, so carry them through untouched instead of dropping them).
-      for (const sponsorTag of event.event.tags.filter(([name]) => name === 'sponsor')) {
-        tags.push(sponsorTag);
+      // Carry through every tag the edit form doesn't manage, untouched. This
+      // is an addressable event, so re-publishing REPLACES the whole tag set —
+      // if we only rebuilt the fields on this form we'd silently strip linked
+      // spots/crews/tours/musicians, the entry fee, the paid "featured" (Pro)
+      // listing, sponsors, and any other tags an event was created with.
+      const MANAGED_TAGS = new Set([
+        'd', 'title', 'start', 'end', 'location', 'g', 'image', 'alt',
+      ]);
+      // `t` is special: we fully rebuild the topic tags this form owns
+      // (skateboarding + selected types), but must preserve OTHER `t` values
+      // like 'paid' that other parts of the app set.
+      const managedTopics = new Set(['skateboarding', ...selectedTypes]);
+      for (const tag of event.event.tags) {
+        const [name, value] = tag;
+        if (MANAGED_TAGS.has(name)) continue;
+        if (name === 't') {
+          if (!managedTopics.has(value)) tags.push(tag); // keep foreign topics (e.g. 'paid')
+          continue;
+        }
+        tags.push(tag); // a-refs, *-name, entry-fee, featured, sponsor, etc.
       }
 
       // Detect the changes attendees care about (time / location) BEFORE we