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/contexts/AuthContext.jsx

@@ -30,6 +30,14 @@ export function AuthProvider({ children }) {
     return data
   }, [])
 
+  // Public self-registration (player). Creates the account, sets the session
+  // cookie, and returns { user }. `extra` carries the honeypot + optional email.
+  const register = useCallback(async (username, password, extra) => {
+    const data = await api.register(username, password, extra)
+    if (data.user) setUser(data.user)
+    return data
+  }, [])
+
   // Step 2 for TOTP users: exchange the challenge + code for a real session.
   const loginTotp = useCallback(async (challenge, code) => {
     const data = await api.loginTotp(challenge, code)
@@ -54,7 +62,7 @@ export function AuthProvider({ children }) {
   }, [])
 
   return (
-    <AuthContext.Provider value={{ user, loading, login, loginTotp, ssoLoginTotp, logout, refresh }}>
+    <AuthContext.Provider value={{ user, loading, login, register, loginTotp, ssoLoginTotp, logout, refresh }}>
       {children}
     </AuthContext.Provider>
   )