Add player portal + character-sheet front end (phase 4 follow-up)

Turns the raw shard endpoints into proper, navigable pages in the site's visual
language.

- components/CharacterSheet.jsx: reusable sheet — attribute tiles, vitals bars,
  resistances, skills (with bars), and equipment — styled with the shared
  panel/grid vocabulary.
- Player portal with a nav bar: PlayerPortalLayout (Characters / Account tabs +
  sign-out) wraps /player and /account. /player (PlayerCharacters) tells the
  logged-in player if they haven't linked a game account (with the [link code
  prompt) or, once linked, shows their characters grouped by account; each
  character opens its sheet at /player/char/:serial. Account security moved into
  the same shell (the buried "Game accounts" block was removed from it).
  Login/register now land on /player.
- Public: GET /public/shard/online (redacted name+serial+map) drives an
  "Online now" list on /site/shard that links to public character sheets at
  /site/shard/char/:serial (ShardChar). Swagger: ShardOnlinePlayer + regenerated.
- api.shard.online added.

Verified live against the running shard: Darrow's full sheet (STR 120, 58
skills, 3 equipment) renders through the browser-facing proxy; the online list
returns the live roster; player routes 401 without a session.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_011qPmpmVH1xGCiZoz9m9vW3

client/src/routes/public/Shard.jsx

@@ -1,3 +1,4 @@
+import { Link } from 'react-router-dom'
 import PublicLayout from '../../components/PublicLayout.jsx'
 import PageHeader from '../../components/PageHeader.jsx'
 import { Loading, ErrorState } from '../../components/PageState.jsx'
@@ -75,9 +76,13 @@ function nameOf(who) {
 
 export default function Shard() {
   const { loading, error, data } = useAsync(() =>
-    Promise.all([api.shard.status(), api.shard.feed({ kind: 'vendor.sale', limit: 8 }), api.shard.idoc(), api.shard.economy(60)]).then(
-      ([status, sales, idoc, economy]) => ({ status, sales, idoc, economy }),
-    ),
+    Promise.all([
+      api.shard.status(),
+      api.shard.feed({ kind: 'vendor.sale', limit: 8 }),
+      api.shard.idoc(),
+      api.shard.economy(60),
+      api.shard.online(),
+    ]).then(([status, sales, idoc, economy, online]) => ({ status, sales, idoc, economy, online })),
   )
   const { events, connected } = useShardFeed({ max: 30 })
 
@@ -141,6 +146,31 @@ export default function Shard() {
               <Stat value={online ? 'Up' : 'Down'} label="Shard link" />
             </section>
 
+            {/* Online now */}
+            <section className="panel" style={{ padding: 20, marginBottom: 24 }}>
+              <div className="sans" style={{ color: 'var(--accent)', fontSize: '0.7rem', letterSpacing: '0.12em', textTransform: 'uppercase', marginBottom: 12 }}>
+                Online now
+              </div>
+              {(!data.online || data.online.length === 0) ? (
+                <p className="sans dim" style={{ margin: 0, fontSize: '0.88rem' }}>No one is online right now.</p>
+              ) : (
+                <div style={{ display: 'flex', flexWrap: 'wrap', gap: 10 }}>
+                  {data.online.map((p) => (
+                    <Link
+                      key={p.serial}
+                      to={`/site/shard/char/${p.serial}`}
+                      className="sans"
+                      style={{ display: 'inline-flex', alignItems: 'center', gap: 8, padding: '8px 14px', border: '1px solid var(--line)', borderRadius: 999, color: 'var(--ink)', textDecoration: 'none' }}
+                    >
+                      <span style={{ width: 8, height: 8, borderRadius: '50%', background: '#7fd0a4' }} />
+                      {p.name || p.serial}
+                      {p.map && <span className="dim" style={{ fontSize: '0.76rem' }}>· {p.map}</span>}
+                    </Link>
+                  ))}
+                </div>
+              )}
+            </section>
+
             {/* Economy sparkline */}
             {data.economy && data.economy.length > 1 && (
               <section className="panel" style={{ padding: 20, marginBottom: 24 }}>