Player accounts frontend + Swagger + schema comment fix

- Player portal: RequirePlayer guard, /account routes (login, register,
  settings) with shared PlayerShell; register reads /public/settings derived
  flags; AuthContext.register; api.register + api.player.* namespace.
- Admin UI: player role + status/email + reset-password hint in UserEditor,
  status column + badge-player in UsersAdmin, player_registration select in
  SettingsAdmin; 'disabled' SSO error copy.
- Swagger: Player tag + RegisterRequest/ChangeUsername/ChangePassword/
  PlayerAccount/OkFlag schemas; regenerated swagger-output.json.
- Fix: remove a semicolon from a schema.sql inline comment that broke the
  statement splitter in ensureSchema.

Verified against the live dev DB: schema migrations apply (player enum,
nullable password_hash, email/status/last_login_ip, seeded setting); 21-check
controller smoke (register gating, dup/reserved, null-hash rules, self change
username/password with session re-issue surviving the cutoff, SSO-only initial
password, banned-login refusal); case-insensitive uniqueness; public settings
expose only derived registration flags. Client builds; 133 server tests green.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_019rao86n5cXpwAyjdBFEshV

client/src/components/RequirePlayer.jsx

@@ -0,0 +1,23 @@
+import { Navigate, useLocation } from 'react-router-dom'
+import { useAuth } from '../contexts/AuthContext.jsx'
+
+// Gate for the /account player portal. Redirects to the player login when there
+// is no session, or when the signed-in user is not a player (staff manage their
+// own account under /admin/account). Server-side requireRole('player') is the
+// real enforcement; this just keeps the UI honest.
+export default function RequirePlayer({ children }) {
+  const { user, loading } = useAuth()
+  const location = useLocation()
+
+  if (loading) {
+    return (
+      <div style={{ minHeight: '100vh', display: 'grid', placeItems: 'center', background: 'var(--bg-deep)' }}>
+        <span className="spin" />
+      </div>
+    )
+  }
+  if (!user || user.role !== 'player') {
+    return <Navigate to="/account/login" state={{ from: location }} replace />
+  }
+  return children
+}