feat: Update auth screens (#11108)

# Pull Request Template

## Description

This PR includes style updates for auth screens

## Type of change

- [x] Bug fix (non-breaking change which fixes an issue)


## Checklist:

- [x] My code follows the style guidelines of this project
- [x] I have performed a self-review of my code
- [x] I have commented on my code, particularly in hard-to-understand
areas
- [ ] I have made corresponding changes to the documentation
- [x] My changes generate no new warnings
- [ ] I have added tests that prove my fix is effective or that my
feature works
- [x] New and existing unit tests pass locally with my changes
- [ ] Any dependent changes have been merged and published in downstream
modules

app/javascript/v3/views/auth/confirmation/Index.vue

@@ -30,8 +30,10 @@ export default {
 </script>
 
 <template>
-  <div class="flex items-center justify-center h-full w-full">
+  <div
+    class="flex items-center justify-center min-h-screen h-full bg-n-background w-full"
+  >
     <Spinner color-scheme="primary" size="" />
-    <div class="ml-2">{{ $t('CONFIRM_EMAIL') }}</div>
+    <div class="ml-2 text-n-slate-11">{{ $t('CONFIRM_EMAIL') }}</div>
   </div>
 </template>