chore: Make contacts bulk action bar sticky (#12773)

# Pull Request Template

## Description

This PR makes the contacts bulk action bar sticky while scrolling.

## Type of change

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

## How Has This Been Tested?

### Screenshots
<img width="1080" height="300" alt="image"
src="https://github.com/user-attachments/assets/21f8f3c6-813e-4ef6-b40a-8dd14e6ffb26"
/>
<img width="1080" height="300" alt="image"
src="https://github.com/user-attachments/assets/bb939f1d-9a13-4f9f-953d-b9872c984b74"
/>



## Checklist:

- [x] My code follows the style guidelines of this project
- [x] I have performed a self-review of my code
- [ ] 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/captain/assistant/BulkSelectBar.vue

@@ -61,7 +61,7 @@ const bulkCheckboxState = computed({
   >
     <div
       v-if="hasSelected"
-      class="flex items-center justify-between gap-3 py-1 ltr:pl-3 rtl:pr-3 ltr:pr-4 rtl:pl-4 rounded-lg bg-n-solid-2 outline outline-1 outline-n-container shadow"
+      class="flex items-center gap-3 py-1 ltr:pl-3 rtl:pr-3 ltr:pr-4 rtl:pl-4 rounded-lg bg-n-solid-2 outline outline-1 outline-n-container shadow"
     >
       <div class="flex items-center gap-3">
         <div class="flex items-center gap-1.5 min-w-0">