fix: prevent focus jump to title after new article auto-creates (#14145)

# Pull Request Template

## Description

When creating a help center article, typing a title and navigating into
the content auto-creates the article and switches the route
(`/articles/new` → `/articles/.../edit/:slug`). During this transition,
focus was jumping back to the title, interrupting editing.

This happened because `ArticleEditor` always autofocuses the title. On
route change, the component remounts and re-triggers focus. Now, after
auto-create, focus stays in the body as expected.


Fixes
https://linear.app/chatwoot/issue/CW-6951/issue-with-the-cursor-position-on-the-help-center-article-when

## Type of change

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

## How Has This Been Tested?

**Screencast**


https://github.com/user-attachments/assets/dac3f7c6-08c4-4df2-afb0-7731ee76424b



## 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/HelpCenter/Pages/ArticleEditorPage/ArticleEditor.vue

@@ -121,7 +121,7 @@ const handleCreateArticle = event => {
           custom-text-area-class="!text-[32px] !leading-[48px] !font-medium !tracking-[0.2px]"
           custom-text-area-wrapper-class="border-0 !bg-transparent dark:!bg-transparent !py-0 !px-0"
           placeholder="Title"
-          autofocus
+          :autofocus="isNewArticle"
           @blur="handleCreateArticle"
         />
         <ArticleEditorControls
@@ -138,7 +138,7 @@ const handleCreateArticle = event => {
           t('HELP_CENTER.EDIT_ARTICLE_PAGE.EDIT_ARTICLE.EDITOR_PLACEHOLDER')
         "
         :enabled-menu-options="ARTICLE_EDITOR_MENU_OPTIONS"
-        :autofocus="false"
+        :autofocus="!isNewArticle"
       />
     </template>
   </HelpCenterLayout>