Let staff link their own characters + share the game-accounts UI

- Backend: /admin/shard/{link,accounts,roster/:account,vendors/:account} —
  staff self-service, reusing the player/shard controller (it keys off
  req.user.id, so the same handlers serve any logged-in role). Swagger under
  Admin · Account; spec regenerated.
- components/GameAccounts.jsx: the link-prompt + character-roster UI extracted
  into one reusable component parametrized by an api scope and a charTo(serial)
  route builder.
- PlayerCharacters now renders it (player scope → /player/char/:serial).
- Admin: "My Characters" nav item + /admin/characters (AdminCharacters) and
  /admin/characters/:serial (AdminCharacter, in-shell sheet), using the admin
  self-service scope. api.admin.shard.* added.

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

client/src/components/GameAccounts.jsx

@@ -0,0 +1,156 @@
+import { useCallback, useEffect, useState } from 'react'
+import { Link } from 'react-router-dom'
+import { Loading, ErrorState } from './PageState.jsx'
+
+// Shared game-account linking + character roster, used by both the player portal
+// (/player) and the staff account page (/admin/account). `scope` is the api
+// object with { link, accounts, roster } (player or admin self-service); `charTo`
+// maps a serial to the route for that character's sheet.
+
+function LinkForm({ scope, onLinked, compact }) {
+  const [code, setCode] = useState('')
+  const [busy, setBusy] = useState(false)
+  const [msg, setMsg] = useState('')
+  const [error, setError] = useState('')
+
+  async function submit(e) {
+    e.preventDefault()
+    setMsg(''); setError('')
+    if (!code.trim()) return
+    setBusy(true)
+    try {
+      const { account } = await scope.link(code.trim())
+      setMsg(`Linked ${account}.`)
+      setCode('')
+      await onLinked()
+    } catch (err) {
+      setError(err.message || 'Could not link that code.')
+    } finally {
+      setBusy(false)
+    }
+  }
+
+  return (
+    <form onSubmit={submit} style={{ display: 'flex', gap: 10, alignItems: 'flex-end', flexWrap: 'wrap', marginTop: compact ? 0 : 6 }}>
+      <label style={{ display: 'block' }}>
+        {!compact && <span className="field-label">Link code</span>}
+        <input
+          type="text"
+          value={code}
+          onChange={(e) => setCode(e.target.value.toUpperCase())}
+          className="input"
+          autoComplete="off"
+          placeholder="AB12CD"
+          style={{ maxWidth: 180, textTransform: 'uppercase', letterSpacing: '0.12em' }}
+        />
+      </label>
+      <button type="submit" disabled={busy || !code.trim()} className="btn btn-primary btn-sq">
+        {busy ? 'Linking…' : 'Link account'}
+      </button>
+      {msg && <span className="sans" style={{ color: '#7fd0a4', fontSize: '0.85rem' }}>{msg}</span>}
+      {error && <span className="sans" style={{ color: '#d98b84', fontSize: '0.85rem' }}>{error}</span>}
+    </form>
+  )
+}
+
+function AccountRoster({ scope, account, charTo }) {
+  const [roster, setRoster] = useState(null)
+  const [error, setError] = useState('')
+  const [unavailable, setUnavailable] = useState(false)
+
+  const load = useCallback(async () => {
+    setError(''); setUnavailable(false)
+    try {
+      setRoster(await scope.roster(account))
+    } catch (err) {
+      if (err.status === 503) setUnavailable(true)
+      else setError(err.message || 'Could not load this account.')
+    }
+  }, [scope, account])
+  useEffect(() => { load() }, [load])
+
+  if (unavailable) {
+    return (
+      <div>
+        <p className="sans" style={{ margin: '0 0 8px', color: '#e0b070', fontSize: '0.85rem' }}>The game server is restarting — try again shortly.</p>
+        <button className="pill" onClick={load}>Retry</button>
+      </div>
+    )
+  }
+  if (error) return <p className="sans" style={{ margin: 0, color: '#d98b84', fontSize: '0.85rem' }}>{error}</p>
+  if (!roster) return <p className="sans dim" style={{ margin: 0, fontSize: '0.82rem' }}>Loading…</p>
+
+  const chars = roster.chars || []
+  if (chars.length === 0) return <p className="sans dim" style={{ margin: 0, fontSize: '0.84rem' }}>No characters on this account.</p>
+
+  return (
+    <div className="grid-2" style={{ gap: 12 }}>
+      {chars.map((c) => (
+        <Link
+          key={c.serial}
+          to={charTo(c.serial)}
+          style={{ display: 'flex', alignItems: 'center', gap: 12, padding: '14px 16px', border: '1px solid var(--line)', borderRadius: 10, textDecoration: 'none', background: 'rgba(255,255,255,0.02)' }}
+        >
+          <span style={{ flex: 'none', width: 40, height: 40, borderRadius: '50%', background: 'linear-gradient(180deg,#2a3a52,#1a2536)', border: '1px solid var(--line)', display: 'flex', alignItems: 'center', justifyContent: 'center', color: '#d8e2ef', fontSize: '1rem', textTransform: 'uppercase' }}>
+            {(c.name || '?').charAt(0)}
+          </span>
+          <div style={{ flex: 1, minWidth: 0 }}>
+            <div className="display" style={{ color: 'var(--head)', fontSize: '1.02rem' }}>{c.name}</div>
+            <div className="sans" style={{ fontSize: '0.76rem', color: c.online ? '#7fd0a4' : 'var(--muted)' }}>{c.online ? 'Online' : 'Offline'}</div>
+          </div>
+          <span className="sans dim" style={{ fontSize: '1.1rem' }}>›</span>
+        </Link>
+      ))}
+    </div>
+  )
+}
+
+export default function GameAccounts({ scope, charTo }) {
+  const [accounts, setAccounts] = useState(null)
+  const [error, setError] = useState('')
+
+  const load = useCallback(async () => {
+    setError('')
+    try {
+      setAccounts(await scope.accounts())
+    } catch {
+      setError('Could not load your game accounts.')
+    }
+  }, [scope])
+  useEffect(() => { load() }, [load])
+
+  if (error) return <ErrorState message={error} />
+  if (!accounts) return <Loading />
+
+  // Not linked yet — prompt to link.
+  if (accounts.length === 0) {
+    return (
+      <div className="panel" style={{ padding: 22 }}>
+        <div className="field-label" style={{ marginBottom: 8 }}>Link your game account</div>
+        <p className="sans" style={{ marginTop: 0, color: 'var(--muted)', fontSize: '0.88rem', lineHeight: 1.6 }}>
+          You haven’t linked a game account yet. In game, type <code style={{ color: 'var(--head)' }}>[link</code> to get a
+          one-time code, then enter it below to see your characters, stats, skills and vendors here.
+        </p>
+        <LinkForm scope={scope} onLinked={load} />
+      </div>
+    )
+  }
+
+  // Linked — characters grouped by account.
+  return (
+    <div style={{ display: 'flex', flexDirection: 'column', gap: 26 }}>
+      {accounts.map((a) => (
+        <section key={a.account}>
+          <div className="sans" style={{ color: 'var(--accent)', fontSize: '0.7rem', letterSpacing: '0.12em', textTransform: 'uppercase', marginBottom: 12 }}>
+            {a.account}
+          </div>
+          <AccountRoster scope={scope} account={a.account} charTo={charTo} />
+        </section>
+      ))}
+      <section style={{ borderTop: '1px solid var(--line-soft)', paddingTop: 20 }}>
+        <div className="field-label" style={{ marginBottom: 10 }}>Link another account</div>
+        <LinkForm scope={scope} onLinked={load} compact />
+      </section>
+    </div>
+  )
+}