fix: RTL issues in new conversation form (#12163)

# Pull Request Template

## Description

This PR fixes RTL alignment issues in the new conversation form, removes
the unused
[`form-checkbox`](https://github.com/chatwoot/chatwoot/pull/12151#discussion_r2266333315)
class name and drops the `app-rtl--wrapper` class, which was previously
used for RTL detection in `rtl.scss` (removed earlier)

Fixes https://linear.app/chatwoot/issue/CW-5410/rtl-issues

## Type of change

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

## How Has This Been Tested?

### Screenshots

<img width="868" height="474" alt="image"
src="https://github.com/user-attachments/assets/45995652-2895-49d5-a651-179090c949ec"
/>
<img width="868" height="656" alt="image"
src="https://github.com/user-attachments/assets/a1cb4415-3fd4-4c9a-bc46-5e07e437d757"
/>
<img width="868" height="656" alt="image"
src="https://github.com/user-attachments/assets/77c8981f-364e-4bf0-bea8-a4c42a76d065"
/>



## 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/NewConversation/components/WhatsappTemplateParser.vue

@@ -106,7 +106,7 @@ onMounted(() => {
 
 <template>
   <div
-    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"
+    class="absolute top-full mt-1.5 max-h-[30rem] overflow-y-auto ltr:left-0 rtl:right-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">
       {{
@@ -138,7 +138,8 @@ onMounted(() => {
       class="flex items-center w-full gap-2"
     >
       <span
-        class="flex items-center h-8 text-sm min-w-6 ltr:text-left rtl:text-right text-n-slate-10"
+        class="block h-8 text-sm min-w-6 text-start truncate text-n-slate-10 leading-8"
+        :title="key"
       >
         {{ key }}
       </span>