Fix PWA manifest link injection and navigateFallback error

- Add useHead() in app.vue to inject manifest and PWA meta tags
- Set navigateFallback to undefined to prevent non-precached-url error
- Add includeAssets configuration for PWA module
- Fixes service worker error on initial page load

🤖 Generated with [Claude Code](https://claude.com/claude-code)

nuxt4/nuxt.config.ts

@@ -22,6 +22,7 @@ export default defineNuxtConfig({
 
   pwa: {
     registerType: 'autoUpdate',
+    includeAssets: ['favicon.ico', 'apple-touch-icon.png', 'icon.svg'],
     manifest: {
       name: 'Plantilla Nuxt + Authentik',
       short_name: 'NuxtAuth',
@@ -54,7 +55,7 @@ export default defineNuxtConfig({
       ]
     },
     workbox: {
-      navigateFallback: '/',
+      navigateFallback: undefined,
       globPatterns: ['**/*.{js,css,html,png,svg,ico}'],
       cleanupOutdatedCaches: true,
       runtimeCaching: [