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/dialog/content/MissingCoreNodesMessage.vue

@@ -24,16 +24,14 @@
         :key="version"
         class="ml-4"
       >
-        <div
-          class="text-sm font-medium text-surface-600 dark-theme:text-surface-400"
-        >
+        <div class="text-sm font-medium text-surface-600">
           {{
             $t('loadWorkflowWarning.coreNodesFromVersion', {
               version: version || 'unknown'
             })
           }}
         </div>
-        <div class="ml-4 text-sm text-surface-500 dark-theme:text-surface-500">
+        <div class="ml-4 text-sm text-surface-500">
           {{ getUniqueNodeNames(nodes).join(', ') }}
         </div>
       </div>