Eliminates XSS token theft risk by storing session JWTs in an httpOnly
cookie (trek_session) instead of localStorage, making them inaccessible
to JavaScript entirely.
- Add cookie-parser middleware and setAuthCookie/clearAuthCookie helpers
- Set trek_session cookie on login, register, demo-login, MFA verify, OIDC exchange
- Auth middleware reads cookie first, falls back to Authorization: Bearer (MCP unchanged)
- Add POST /api/auth/logout to clear the cookie server-side
- Remove all localStorage auth_token reads/writes from client
- Axios uses withCredentials; raw fetch calls use credentials: include
- WebSocket ws-token exchange uses credentials: include (no JWT param)
- authStore initialises isLoading: true so ProtectedRoute waits for /api/auth/me
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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