feat: Use new compose conversation in conversation sidebar (#11085)

# Pull Request Template

## Description

This PR includes the implementation of the new Compose Conversation form
in the conversation sidebar, replacing the old one.

## Type of change

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

## How Has This Been Tested?

### Loom video

https://www.loom.com/share/4312e20a63714eb892d7b5cd0dcda893?sid=9bd5254e-2b1f-462c-b2c1-a3048a111683

## 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/NewConversation/components/ActionButtons.vue

@@ -232,4 +232,20 @@ useKeyboardEvents(keyboardEvents);
 .emoji-dialog::before {
   @apply hidden;
 }
+
+// The <label> tag inside the file-upload component overlaps the button due to its position.
+// This causes the button's hover state to not work, as it's positioned below the label (z-index).
+// Increasing the button's z-index would break the file upload functionality.
+// This style ensures the label remains clickable while preserving the button's hover effect.
+:deep() {
+  .file-uploads.file-uploads-html5 {
+    label {
+      @apply hover:cursor-pointer;
+    }
+
+    &:hover button {
+      @apply dark:bg-n-solid-2 bg-n-alpha-2;
+    }
+  }
+}
 </style>

app/javascript/dashboard/components-next/NewConversation/components/ComposeNewConversationForm.vue

@@ -265,7 +265,7 @@ const handleSendWhatsappMessage = async ({ message, templateParams }) => {
 
 <template>
   <div
-    class="w-[42rem] mt-2 divide-y divide-n-strong overflow-visible transition-all duration-300 ease-in-out top-full justify-between flex flex-col bg-n-alpha-3 border border-n-strong shadow-sm backdrop-blur-[100px] rounded-xl"
+    class="w-[42rem] divide-y divide-n-strong overflow-visible transition-all duration-300 ease-in-out top-full justify-between flex flex-col bg-n-alpha-3 border border-n-strong shadow-sm backdrop-blur-[100px] rounded-xl"
   >
     <ContactSelector
       :contacts="contacts"

app/javascript/dashboard/components-next/NewConversation/components/ContactSelector.vue

@@ -113,7 +113,8 @@ const handleInput = value => {
       </div>
       <div
         v-else-if="selectedContact"
-        class="flex items-center gap-1.5 rounded-md bg-n-alpha-2 px-3 min-h-7 min-w-0"
+        class="flex items-center gap-1.5 rounded-md bg-n-alpha-2 min-h-7 min-w-0"
+        :class="!contactId ? 'ltr:pl-3 rtl:pr-3 ltr:pr-1 rtl:pl-1' : 'px-3'"
       >
         <span class="text-sm truncate text-n-slate-12">
           {{
@@ -123,6 +124,7 @@ const handleInput = value => {
           }}
         </span>
         <Button
+          v-if="!contactId"
           variant="ghost"
           icon="i-lucide-x"
           color="slate"

app/javascript/dashboard/components-next/NewConversation/components/InboxSelector.vue

@@ -52,7 +52,7 @@ const targetInboxLabel = computed(() => {
     </label>
     <div
       v-if="targetInbox"
-      class="flex items-center gap-1.5 rounded-md bg-n-alpha-2 truncate px-3 h-7 min-w-0"
+      class="flex items-center gap-1.5 rounded-md bg-n-alpha-2 truncate ltr:pl-3 rtl:pr-3 ltr:pr-1 rtl:pl-1 h-7 min-w-0"
     >
       <span class="text-sm truncate text-n-slate-12">
         {{ targetInboxLabel }}

app/javascript/dashboard/components-next/NewConversation/components/WhatsAppOptions.vue

@@ -84,7 +84,7 @@ const handleSendMessage = template => {
     />
     <div
       v-if="showTemplatesMenu"
-      class="absolute top-full mt-1.5 max-h-96 overflow-y-auto left-0 flex flex-col gap-2 p-4 items-center w-[350px] h-auto bg-n-solid-2 border border-n-strong shadow-sm rounded-lg"
+      class="absolute top-full mt-1.5 max-h-96 overflow-y-auto left-0 flex flex-col gap-2 p-4 items-center w-[21.875rem] h-auto bg-n-solid-2 border border-n-strong shadow-sm rounded-lg"
     >
       <div class="relative w-full">
         <span class="absolute i-lucide-search size-3.5 top-2 left-3" />

app/javascript/dashboard/components-next/NewConversation/components/WhatsappTemplateParser.vue

@@ -106,7 +106,7 @@ onMounted(() => {
 
 <template>
   <div
-    class="absolute top-full mt-1.5 max-h-[500px] overflow-y-auto left-0 flex flex-col gap-4 px-4 pt-6 pb-5 items-start w-[460px] h-auto bg-n-solid-2 border border-n-strong shadow-sm rounded-lg"
+    class="absolute top-full mt-1.5 max-h-[30rem] overflow-y-auto left-0 flex flex-col gap-4 px-4 pt-6 pb-5 items-start w-[28.75rem] h-auto bg-n-solid-2 border border-n-strong shadow-sm rounded-lg"
   >
     <span class="text-sm text-n-slate-12">
       {{