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/App.jsx

@@ -17,7 +17,6 @@ import NewsletterIssue from './routes/public/NewsletterIssue.jsx'
 import About from './routes/public/About.jsx'
 import Status from './routes/public/Status.jsx'
 import Shard from './routes/public/Shard.jsx'
-import ShardChar from './routes/public/ShardChar.jsx'
 import ShardActivity from './routes/public/ShardActivity.jsx'
 import Wiki from './routes/wiki/Wiki.jsx'
 import WikiArticle from './routes/wiki/WikiArticle.jsx'
@@ -77,7 +76,6 @@ export default function App() {
             <Route path="/site/status" element={<Status />} />
             <Route path="/site/shard" element={<Shard />} />
             <Route path="/site/shard/activity" element={<ShardActivity />} />
-            <Route path="/site/shard/char/:serial" element={<ShardChar />} />
             <Route path="/wiki" element={<Wiki />} />
             <Route path="/wiki/:slug" element={<WikiArticle />} />
             {/* CMS pages: top-level /:slug, matched only after the named routes