Enable SSR for Authentik header reading

- Changed ssr: false to ssr: true in nuxt.config.ts
- This is critical for useAuthentik() to read headers during server-side rendering
- Without SSR, the composable cannot access Authentik proxy headers
- User authentication state will now be properly initialized on page load

nuxt4-app/nuxt.config.ts

@@ -2,7 +2,7 @@
 import { disableImportProtection } from './nuxt.config.workaround'
 
 export default defineNuxtConfig({
-  ssr: false,
+  ssr: true,
   compatibilityDate: '2025-07-15',
   devtools: { enabled: true },
   css: ['~/assets/css/main.css'],