Fix: Apply landmark roles to content

Accessibility: All page content should be contained by landmarks
Reference: alphagov/govuk-frontend#1604

- re-enabled the AXE rule `region`
- apply role attribute to phase banner and navigation, language switcher grids

app/views/layouts/application.html.erb

@@ -42,9 +42,10 @@
             tag: { text: t(".header.phase") },
             text: t(".header.phase_banner_html", link: govuk_link_to(t(".header.feedback"), new_feedback_path)),
             classes: "no-print",
+            html_attributes: { role: "complementary" },
           ) %>
 
-      <div class="govuk-grid-row">
+      <div class="govuk-grid-row" role="navigation">
         <div class="govuk-grid-column-one-half show-empty">
           <%= content_for(:navigation) %>
         </div>

features/step_definitions/civil_journey_steps.rb

@@ -898,13 +898,13 @@
 end
 
 Given("I click Check Your Answers Change link for vehicle {string}") do |vehicle|
-  steps %(Then the page should be axe clean skipping: region, aria-allowed-attr) if run_axe?
+  steps %(Then the page should be axe clean skipping: aria-allowed-attr) if run_axe?
 
   find_link("Vehicle #{vehicle}", visible: false).click
 end
 
 Given("I click Check Your Answers Change link for proceeding {string}") do |question|
-  steps %(Then the page should be axe clean skipping: region, aria-allowed-attr) if run_axe?
+  steps %(Then the page should be axe clean skipping: aria-allowed-attr) if run_axe?
   question_id = question.parameterize(separator: "_")
 
   within "#app-check-your-answers__proceeding_#{question_id}" do

features/support/steps_helper.rb

@@ -89,7 +89,7 @@
 end
 
 Then("I click {string}") do |button_name|
-  steps %(Then the page should be axe clean skipping: region, aria-allowed-attr) if run_axe?
+  steps %(Then the page should be axe clean skipping: aria-allowed-attr) if run_axe?
   click_button(button_name)
 end