FIX: Display new-new selector on glimmer topic list (#27602)

app/assets/javascripts/discourse/app/components/topic-list/topic-list-header-column.gjs

@@ -136,7 +136,7 @@ export default class TopicListHeaderColumn extends Component {
       {{/if}}
 
       {{#unless @bulkSelectEnabled}}
-        {{#if this.showTopicsAndRepliesToggle}}
+        {{#if @showTopicsAndRepliesToggle}}
           <NewListHeaderControls
             @current={{@newListSubset}}
             @newRepliesCount={{@newRepliesCount}}

spec/fabricators/topic_fabricator.rb

@@ -35,3 +35,23 @@ Fabricator(:group_private_message_topic, from: :topic) do
   topic_allowed_users { |t| [Fabricate.build(:topic_allowed_user, user: t[:user])] }
   topic_allowed_groups { |t| [Fabricate.build(:topic_allowed_group, group: t[:recipient_group])] }
 end
+
+Fabricator(:new_reply_topic, from: :topic) do
+  transient :current_user
+
+  before_create do |topic, transient|
+    if !transient[:current_user]
+      raise "new_reply_topic fabricator requires the `current_user` param"
+    end
+  end
+
+  after_create do |topic, transient|
+    Fabricate.times(2, :post, topic: topic)
+    TopicUser.change(
+      transient[:current_user].id,
+      topic.id,
+      notification_level: TopicUser.notification_levels[:tracking],
+    )
+    TopicUser.update_last_read(transient[:current_user], topic.id, 1, 1, 1)
+  end
+end

spec/system/topic_list/glimmer_spec.rb

@@ -20,6 +20,23 @@ describe "glimmer topic list", type: :system do
     end
   end
 
+  describe "/new" do
+    let(:topic_list) { PageObjects::Components::TopicList.new }
+
+    it "shows the list and the toggle buttons" do
+      SiteSetting.experimental_new_new_view_groups = group.name
+      Fabricate(:topic)
+      Fabricate(:new_reply_topic, current_user: user)
+
+      visit("/new")
+
+      expect(topic_list).to have_topics(count: 2)
+      expect(page).to have_css(".topics-replies-toggle.--all")
+      expect(page).to have_css(".topics-replies-toggle.--topics")
+      expect(page).to have_css(".topics-replies-toggle.--replies")
+    end
+  end
+
   describe "categories-with-featured-topics page" do
     let(:category_list) { PageObjects::Components::CategoryList.new }