Change design of link previews in web UI (#26136)

app/lib/link_details_extractor.rb

@@ -124,6 +124,7 @@ class LinkDetailsExtractor
       author_url: author_url || '',
       embed_url: embed_url || '',
       language: language,
+      created_at: published_at,
     }
   end
 
@@ -159,6 +160,10 @@ class LinkDetailsExtractor
     html_entities.decode(structured_data&.description || opengraph_tag('og:description') || meta_tag('description'))
   end
 
+  def published_at
+    structured_data&.date_published || opengraph_tag('article:published_time')
+  end
+
   def image
     valid_url_or_nil(opengraph_tag('og:image'))
   end