feat(v4): Update the help center portal design (#10296)

Co-authored-by: Pranav <pranavrajs@gmail.com>

app/views/api/v1/accounts/articles/index.json.jbuilder

@@ -4,10 +4,10 @@ end
 
 json.meta do
   json.all_articles_count @portal_articles.size
-  json.archived_articles_count @articles.archived.size
+  json.archived_articles_count @archived_articles_count
   json.articles_count @articles_count
   json.current_page @current_page
-  json.draft_articles_count @all_articles.draft.size
-  json.mine_articles_count @all_articles.search_by_author(current_user.id).size if current_user.present?
-  json.published_count @articles.published.size
+  json.draft_articles_count @draft_articles_count
+  json.mine_articles_count @mine_articles_count
+  json.published_count @published_articles_count
 end

app/views/api/v1/accounts/portals/_portal.json.jbuilder

@@ -17,6 +17,12 @@ json.config do
   end
 end
 
+if portal.channel_web_widget
+  json.inbox do
+    json.partial! 'api/v1/models/inbox', formats: [:json], resource: portal.channel_web_widget.inbox
+  end
+end
+
 json.logo portal.file_base_data if portal.logo.present?
 
 json.portal_members do