Fix PermalinkRedirector not applying to users with moved accounts (#22497)

Fixes #22262

app/controllers/concerns/web_app_controller_concern.rb

@@ -4,7 +4,7 @@ module WebAppControllerConcern
   extend ActiveSupport::Concern
 
   included do
-    before_action :redirect_unauthenticated_to_permalinks!
+    prepend_before_action :redirect_unauthenticated_to_permalinks!
     before_action :set_app_body_class
     before_action :set_referrer_policy_header
   end
@@ -18,7 +18,7 @@ module WebAppControllerConcern
   end
 
   def redirect_unauthenticated_to_permalinks!
-    return if user_signed_in?
+    return if user_signed_in? && current_account.moved_to_account_id.nil?
 
     redirect_path = PermalinkRedirector.new(request.path).redirect_path