feat: Portals store integration (#5185)

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

@@ -1,5 +1,4 @@
 json.id article.id
-json.category_id article.category_id
 json.title article.title
 json.content article.content
 json.description article.description
@@ -7,6 +6,11 @@ json.status article.status
 json.account_id article.account_id
 json.updated_at article.updated_at.to_i
 
+json.category do
+  json.id article.category_id
+  json.name article.category.name
+end
+
 if article.portal.present?
   json.portal do
     json.partial! 'api/v1/accounts/portals/portal.json.jbuilder', portal: article.portal