chore: Update reply editor design (#10575)

# Pull Request Template

## Description

This PR will update the reply message editor’s design.

**Screen recording**


https://github.com/user-attachments/assets/40f61903-6bf7-4031-9a36-9027dffc46aa

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Co-authored-by: Pranav <pranavrajs@gmail.com>
Co-authored-by: Shivam Mishra <scm.mymail@gmail.com>

app/javascript/dashboard/components/ChatListHeader.vue

@@ -80,7 +80,7 @@ const toggleConversationLayout = () => {
 
 <template>
   <div
-    class="flex items-center justify-between gap-2 px-4 pb-0"
+    class="flex items-center justify-between gap-2 px-4 pb-0 mb-2"
     :class="{
       'pb-3 border-b border-n-strong': hasAppliedFiltersOrActiveFolders,
       'pt-2.5': showV4View,