fix: kiosk cursor, Esc dead-end, PWA prompt, password overlay, gamepad Enter

- Kiosk: show cursor when active (removed -nocursor from Xorg),
  unclutter hides after 3s idle. X11 on VT7 for Ctrl+Alt+F1/F7 switching.
- Kiosk: keep getty@tty1 running so MOTD is accessible via Ctrl+Alt+F1
- Kiosk: disable Chromium password save overlay (--password-store=basic)
- Esc: don't navigate back from top-level pages (dashboard, login, kiosk)
  to prevent dead-end at root redirect
- PWA: suppress install prompt in kiosk mode (/kiosk path)
- Gamepad: Enter in text fields moves focus to next element (submit button)
  instead of submitting the form

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

neode-ui/src/components/PWAInstallPrompt.vue

@@ -43,7 +43,8 @@ let deferredPrompt: { prompt: () => Promise<{ outcome: string }> } | null = null
 const DISMISS_KEY = 'archipelago_pwa_install_dismissed'
 
 onMounted(() => {
-  // Don't show if already dismissed this session or if already installed
+  // Don't show in kiosk mode, if already dismissed, or if already installed
+  if (window.location.pathname.startsWith('/kiosk')) return
   if (sessionStorage.getItem(DISMISS_KEY) === '1') return
   if (window.matchMedia('(display-mode: standalone)').matches) return
   if ((window.navigator as Navigator & { standalone?: boolean }).standalone) return