fix: mobile contest followers list shows blank (#14316)

## Summary

- The `enabled` option in `useEventFollowers` was placed BEFORE the
`...options` spread, so any caller passing an explicit `enabled` (e.g.
`ContestFollowersModal` with `{ enabled: isOpen }`) silently overrode
the `!!eventId` guard.
- Moved the `enabled` line AFTER the spread and combined the eventId
guard with the caller's value: `enabled: !!eventId && (options?.enabled
?? true)`. The eventId check now always wins, so the query can never run
with a null event id.

## Test plan

- [ ] Open a remix contest page on mobile
- [ ] Tap the "Followers (N)" card to push the dedicated followers
screen
- [ ] Confirm the followers list renders (avatars + handles) instead of
staying blank
- [ ] Confirm the avatar pile on the contest details tab still renders
- [ ] On web, open the contest followers modal and confirm it still
loads correctly (caller passes `{ enabled: isOpen }`)
- [ ] Follow / unfollow an event and confirm the avatar pile updates
(existing invalidation path)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: dylanjeffers

packages/common/src/api/tan-query/events/useEventFollowers.ts

@@ -40,7 +40,6 @@ export const useEventFollowers = (
 
   const queryRes = useQuery({
     queryKey: getEventFollowersQueryKey({ eventId, limit }),
-    enabled: options?.enabled !== false && !!eventId,
     queryFn: async (): Promise<ID[]> => {
       if (!eventId) return []
       try {
@@ -63,7 +62,8 @@ export const useEventFollowers = (
         return []
       }
     },
-    ...options
+    ...options,
+    enabled: !!eventId && (options?.enabled ?? true)
   })
 
   const { data: users } = useUsers(queryRes.data)