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/controllers/api/v1/accounts/articles/bulk_actions_controller.rb

@@ -1,11 +1,31 @@
 class Api::V1::Accounts::Articles::BulkActionsController < Api::V1::Accounts::BaseController
   before_action :portal
   before_action :check_authorization
+  before_action :set_articles, only: [:update_status, :delete_articles]
 
   def translate
     head :not_implemented
   end
 
+  def update_status
+    return render_could_not_create_error(I18n.t('portals.articles.no_articles_found')) if @articles.none?
+    return render_could_not_create_error(I18n.t('portals.articles.invalid_status')) unless Article.statuses.key?(params[:status])
+
+    ActiveRecord::Base.transaction do
+      @articles.find_each { |article| article.update!(status: params[:status]) }
+    end
+    head :ok
+  rescue ActiveRecord::RecordInvalid => e
+    render_could_not_create_error(e.message)
+  end
+
+  def delete_articles
+    return render_could_not_create_error(I18n.t('portals.articles.no_articles_found')) if @articles.none?
+
+    @articles.destroy_all
+    head :ok
+  end
+
   private
 
   def portal
@@ -15,5 +35,9 @@ class Api::V1::Accounts::Articles::BulkActionsController < Api::V1::Accounts::Ba
   def check_authorization
     authorize(Article, :create?)
   end
+
+  def set_articles
+    @articles = @portal.articles.where(id: params[:ids])
+  end
 end
 Api::V1::Accounts::Articles::BulkActionsController.prepend_mod_with('Api::V1::Accounts::Articles::BulkActionsController')