Restrict public presence to staff + let admins view any character

Public "Online now" now lists only players whose game account is linked
to a STAFF website user (admin/editor/moderator) — linked players are no
longer exposed publicly with their name and location. listOnlineLinked
joins through to users and filters on role; the section is relabeled
"Staff online".

Character/roster/vendor reads gain an admin bypass: admins may view any
character's data, while players (and editor/moderator staff) stay limited
to accounts they have personally linked. The bypass lives in the shared
player controller and only ever widens access for genuine admins.

Also finalizes the uo-link character/vendor front end (player + admin
character sheets, VendorSales component, ShardChar removed) and
regenerates swagger-output.json.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_018kj5s1QCKobuFPYmqxjy1q

client/src/routes/admin/views/AdminCharacters.jsx

@@ -1,4 +1,5 @@
 import GameAccounts from '../../../components/GameAccounts.jsx'
+import VendorSales from '../../../components/VendorSales.jsx'
 import { api } from '../../../api/client.js'
 
 // Staff link their OWN in-game account and view their characters — the same
@@ -10,6 +11,7 @@ export default function AdminCharacters() {
         Link your own game account to view your characters, stats, skills and vendors.
       </p>
       <GameAccounts scope={api.admin.shard} charTo={(serial) => `/admin/characters/${serial}`} />
+      <VendorSales fetchSales={api.admin.shard.sales} />
     </section>
   )
 }