Add back link to cards form

As we normally do in other places.

app/controllers/admin/site_customization/cards_controller.rb

@@ -2,6 +2,7 @@ class Admin::SiteCustomization::CardsController < Admin::SiteCustomization::Base
   include Admin::Widget::CardsActions
   load_and_authorize_resource :page, class: "::SiteCustomization::Page"
   load_and_authorize_resource :card, through: :page, class: "Widget::Card"
+  helper_method :index_path
 
   def index
   end

app/controllers/admin/widget/cards_controller.rb

@@ -1,6 +1,7 @@
 class Admin::Widget::CardsController < Admin::BaseController
   include Admin::Widget::CardsActions
   load_and_authorize_resource :card, class: "Widget::Card"
+  helper_method :index_path
 
   private
 

app/views/admin/widget/cards/edit.html.erb

@@ -1,3 +1,5 @@
+<%= back_link_to index_path %>
+
 <h2>
   <% if @card.header? %>
     <%= t("admin.homepage.edit.header_title") %>

app/views/admin/widget/cards/new.html.erb

@@ -1,3 +1,5 @@
+<%= back_link_to index_path %>
+
 <h2>
   <% if @card.header? %>
     <%= t("admin.homepage.new.header_title") %>

spec/system/admin/widgets/cards_spec.rb

@@ -5,6 +5,8 @@ describe "Cards", :admin do
     visit admin_homepage_path
     click_link "Create card"
 
+    expect(page).to have_link("Go back", href: admin_homepage_path)
+
     fill_in "Label (optional)", with: "Card label"
     fill_in "Title", with: "Card text"
     fill_in "Description", with: "Card description"
@@ -74,6 +76,8 @@ describe "Cards", :admin do
       click_link "Edit"
     end
 
+    expect(page).to have_link("Go back", href: admin_homepage_path)
+
     within(".translatable-fields") do
       fill_in "Label (optional)", with: "Card label updated"
       fill_in "Title", with: "Card text updated"
@@ -160,6 +164,9 @@ describe "Cards", :admin do
 
         click_link "Create card"
 
+        expect(page).to have_link("Go back",
+          href: admin_site_customization_page_widget_cards_path(custom_page))
+
         fill_in "Title", with: "Card for a custom page"
         click_button "Create card"
 
@@ -205,6 +212,9 @@ describe "Cards", :admin do
 
         click_link "Edit"
 
+        expect(page).to have_link("Go back",
+          href: admin_site_customization_page_widget_cards_path(custom_page))
+
         within(".translatable-fields") do
           fill_in "Title", with: "Updated title"
         end