feat: Add bulk actions for help center articles (translate, status change, delete) (#14137)

Fixes
https://linear.app/chatwoot/issue/CW-6950/support-bulk-actions-for-publish-archive-move-to-draft-delete-in

How to test

1. Go to Help Center → Articles
2. Select articles using checkboxes → bulk bar appears
3. Click Publish/Draft/Archive → articles update, list refreshes
4. Click Delete → confirmation dialog → articles removed
5. Click Translate (requires Captain enabled) → select locale + category
→ translation starts
6. Try translating to a locale that already has translations → warning
with links to existing articles → "Overwrite and translate" proceeds
8. Single article: click three-dot menu → Translate → same dialog opens
for that article



https://github.com/user-attachments/assets/7c76495e-f89e-4456-92bd-a6639a9992f4

---------

Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

app/javascript/dashboard/routes/dashboard/helpcenter/pages/PortalsArticlesIndexPage.vue

@@ -119,6 +119,7 @@ watch(
       :is-category-articles="isCategoryArticles"
       @page-change="onPageChange"
       @fetch-portal="fetchPortalAndItsCategories"
+      @refresh-articles="fetchArticles"
     />
   </div>
 </template>