Add link from Web UI for Hashtags to the Moderation UI (#31448)

Co-authored-by: Eugen Rochko <eugen@zeonfederated.com>

app/serializers/rest/tag_serializer.rb

@@ -3,10 +3,14 @@
 class REST::TagSerializer < ActiveModel::Serializer
   include RoutingHelper
 
-  attributes :name, :url, :history
+  attributes :id, :name, :url, :history
 
   attribute :following, if: :current_user?
 
+  def id
+    object.id.to_s
+  end
+
   def url
     tag_url(object)
   end