Fix logout to invalidate complete Authentik session

- Change logout endpoint from proxy-only to full invalidation
- Use /flows/-/default/invalidation/ endpoint
- Add NUXT_PUBLIC_AUTHENTIK_URL to runtime config
- Logout now closes session in all applications
- Prevents automatic re-authentication after logout

nuxt4/app/composables/useAuthentik.ts

@@ -38,9 +38,10 @@ export const useAuthentik = () => {
   const isAuthenticated = computed(() => !!user.value)
 
   const logout = () => {
-    // Authentik Proxy Outpost maneja el logout
-    // Redirigir a /outpost.goauthentik.io/sign_out
-    navigateTo('/outpost.goauthentik.io/sign_out', { external: true })
+    // Logout completo: invalida la sesión de Authentik completamente
+    // Esto cierra sesión en todas las aplicaciones
+    const authentikUrl = useRuntimeConfig().public.authentikUrl || 'https://authentik.nucleoriofrio.com'
+    navigateTo(`${authentikUrl}/flows/-/default/invalidation/`, { external: true })
   }
 
   const goToProfile = () => {