feat(seo): add meta tags and page titles

Configure default head meta and title template in nuxt.config.ts
Add dynamic SEO meta tags and robots directives to all pages

app/pages/security/index.vue

@@ -114,6 +114,12 @@ definePageMeta({
   middleware: 'auth'
 })
 
+useSeoMeta({
+  title: 'Security Settings',
+  description: 'Manage password and passkey settings for the dinner ticket system.',
+  robots: 'noindex,nofollow'
+})
+
 const toast = useToast()
 const router = useRouter()
 const auth = useAuth()