fix: is_authenticated should return false if no site or no current user

Author: did

config/initializers/maglev.rb

@@ -37,6 +37,7 @@
   # Editor UI authentication (https://docs.maglev.dev/guides/setup-authentication)
   # config.is_authenticated = :editor_allowed? # name of any protected method from your Rails application controller
   config.is_authenticated = ->(site) do 
+    return false if !site || !current_user
     Rails.logger.info "🔐 site##{site.id} owned by user##{site.siteable.user_id} and requested by user##{current_user&.id}"
     site.siteable.user_id == current_user&.id
   end