- STATE_TTL: 7200s → 315360000s (10 years) so sessions survive indefinitely
- Telegram: "salir"/"/salir" now shows inline confirmation keyboard instead of going straight to menu; "Cerrar sesión" button added to main menu; logout_ask/logout_confirm/confirmLogout() handler clears state and returns to email prompt
- Web chat: "Cerrar sesión" button in main menu; clicking it shows a confirmation message with "Sí, cerrar sesión" / "No, quedarme" buttons; only the confirmed action calls cerrarSesion()
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
