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/management/users/index.vue

@@ -255,6 +255,12 @@ definePageMeta({
   middleware: 'super-admin'
 })
 
+useSeoMeta({
+  title: 'User Management',
+  description: 'Manage staff access for the dinner ticket system.',
+  robots: 'noindex,nofollow'
+})
+
 const toast = useToast()
 const apiClient = useApiClient()
 const auth = useAuth()