Add interstitial for Terms of Service updates (#34527)

app/controllers/terms_of_service_controller.rb

@@ -4,8 +4,19 @@ class TermsOfServiceController < ApplicationController
   include WebAppControllerConcern
 
   skip_before_action :require_functional!
+  skip_before_action :redirect_to_tos_interstitial!
+
+  before_action :clear_redirect_interstitial!
 
   def show
     expires_in(15.seconds, public: true, stale_while_revalidate: 30.seconds, stale_if_error: 1.day) unless user_signed_in?
   end
+
+  private
+
+  def clear_redirect_interstitial!
+    return unless user_signed_in?
+
+    current_user.update(require_tos_interstitial: false)
+  end
 end