Fix haml-lint InstanceVariables rule for auth/sessions/two_factor/o… (#27372)

app/controllers/concerns/two_factor_authentication_concern.rb

@@ -5,6 +5,7 @@ module TwoFactorAuthenticationConcern
 
   included do
     prepend_before_action :authenticate_with_two_factor, if: :two_factor_enabled?, only: [:create]
+    helper_method :webauthn_enabled?
   end
 
   def two_factor_enabled?
@@ -87,4 +88,10 @@ module TwoFactorAuthenticationConcern
 
     set_locale { render :two_factor }
   end
+
+  protected
+
+  def webauthn_enabled?
+    @webauthn_enabled
+  end
 end

app/views/auth/sessions/two_factor.html.haml

@@ -3,7 +3,7 @@
 
 = javascript_pack_tag 'two_factor_authentication', crossorigin: 'anonymous'
 
-- if @webauthn_enabled
+- if webauthn_enabled?
   = render partial: 'auth/sessions/two_factor/webauthn_form', locals: { hidden: @scheme_type != 'webauthn' }
 
 = render partial: 'auth/sessions/two_factor/otp_authentication_form', locals: { hidden: @scheme_type != 'totp' }

app/views/auth/sessions/two_factor/_otp_authentication_form.html.haml

@@ -13,6 +13,6 @@
   - if Setting.site_contact_email.present?
     %p.hint.subtle-hint= t('users.otp_lost_help_html', email: mail_to(Setting.site_contact_email, nil))
 
-  - if @webauthn_enabled
+  - if webauthn_enabled?
     .form-footer
       = link_to(t('auth.link_to_webauth'), '#', id: 'link-to-webauthn')