feat(V5): Update settings pages UI (#13396)

# Pull Request Template

## Description

This PR updates settings page UI


## Type of change

- [x] New feature (non-breaking change which adds functionality)


## 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/dashboard/components-next/sidebar/ChannelLeaf.vue

@@ -25,8 +25,8 @@ const reauthorizationRequired = computed(() => {
 </script>
 
 <template>
-  <span class="size-5 grid place-content-center rounded-full bg-n-alpha-2">
-    <ChannelIcon :inbox="inbox" class="size-3" />
+  <span class="size-4 grid place-content-center rounded-full">
+    <ChannelIcon :inbox="inbox" class="size-4" />
   </span>
   <div class="flex-1 truncate min-w-0">{{ label }}</div>
   <div