Improve PWA offline functionality and fix session caching

- Enable navigateFallback for offline navigation support
- Add JSON files to glob patterns for heroicons support
- Change Authentik API caching from NetworkFirst to NetworkOnly to prevent stale session data
- Add offline detection in checkSessionStatus with proper user feedback
- Add no-cache headers to /api/auth/status endpoint to prevent browser caching
- Show "Modo Offline" toast when user tries to check session while offline

nuxt4/server/api/auth/status.get.ts

@@ -3,6 +3,13 @@
  * Consulta los headers inyectados por Authentik Proxy Outpost
  */
 export default defineEventHandler((event) => {
+  // Establecer headers para prevenir caching
+  setResponseHeaders(event, {
+    'Cache-Control': 'no-store, no-cache, must-revalidate, proxy-revalidate',
+    'Pragma': 'no-cache',
+    'Expires': '0'
+  })
+
   // Leer headers de Authentik en tiempo real
   const headers = getHeaders(event)