Style: Design System use across more components (#6705)

## Summary

Only remaining use is in `buttonTypes.ts` which @viva-jinyi is going to
be working on to consolidate our different buttons soon.

## Changes

- **What**: Replace light/dark colors with theme aware design system
tokens.

## Review Focus

Double check the chosen colors for the components

## Screenshots

| Before | After |
| ------ | ----- |
| <img width="607" height="432" alt="image"
src="https://github.com/user-attachments/assets/6c0ee6d6-819f-40b1-b775-f8b25dd18104"
/> | <img width="646" height="488" alt="image"
src="https://github.com/user-attachments/assets/9c8532de-8ac6-4b48-9021-3fd0b3e0bc63"
/> |

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-6705-Style-WIP-Design-System-use-across-more-components-2ab6d73d365081619115fc5f87a46341)
by [Unito](https://www.unito.io)

---------

Co-authored-by: github-actions <github-actions@github.com>

src/components/button/IconGroup.vue

@@ -10,8 +10,7 @@ import { cn } from '@/utils/tailwindUtil'
 const iconGroupClasses = cn(
   'flex justify-center items-center shrink-0',
   'outline-hidden border-none p-0 rounded-lg',
-  'bg-white dark-theme:bg-zinc-700',
-  'text-neutral-950 dark-theme:text-white',
+  'bg-secondary-background shadow-sm',
   'transition-all duration-200',
   'cursor-pointer'
 )

src/components/button/MoreButton.vue

@@ -7,13 +7,24 @@
 
     <Popover
       ref="popover"
-      :append-to="'body'"
-      :auto-z-index="true"
-      :base-z-index="1000"
-      :dismissable="true"
-      :close-on-escape="true"
+      append-to="body"
+      auto-z-index
+      dismissable
+      close-on-escape
       unstyled
-      :pt="pt"
+      :base-z-index="1000"
+      :pt="{
+        root: {
+          class: cn('absolute z-50')
+        },
+        content: {
+          class: cn(
+            'mt-1 rounded-lg',
+            'bg-secondary-background text-base-foreground',
+            'shadow-lg'
+          )
+        }
+      }"
       @show="$emit('menuOpened')"
       @hide="$emit('menuClosed')"
     >
@@ -26,7 +37,7 @@
 
 <script setup lang="ts">
 import Popover from 'primevue/popover'
-import { computed, ref } from 'vue'
+import { ref } from 'vue'
 
 import type { BaseButtonProps } from '@/types/buttonTypes'
 import { cn } from '@/utils/tailwindUtil'
@@ -57,19 +68,4 @@ const toggle = (event: Event) => {
 const hide = () => {
   popover.value?.hide()
 }
-
-const pt = computed(() => ({
-  root: {
-    class: cn('absolute z-50')
-  },
-  content: {
-    class: cn(
-      'mt-1 rounded-lg',
-      'bg-white dark-theme:bg-zinc-800',
-      'text-neutral dark-theme:text-white',
-      'shadow-lg',
-      'border border-zinc-200 dark-theme:border-zinc-700'
-    )
-  }
-}))
 </script>