Add feature flags search shortcut when feature enabled

- makes the navigation to Feature Flags more convenient
- makes the Feature Flags sub nav element more findable

ee/app/helpers/ee/search_helper.rb

@@ -28,6 +28,13 @@ module EE
       end
     end
 
+    override :project_autocomplete
+    def project_autocomplete
+      return super unless @project && @project.feature_available?(:feature_flags)
+
+      super + [{ category: "In this project", label: _("Feature Flags"), url: project_feature_flags_path(@project) }]
+    end
+
     # This is a special case for snippet searches in .com.
     # The scope used to gather the snippets is too wide and
     # we have to process a lot of them, what leads to time outs.

ee/changelogs/unreleased/ag-feature-flags-search-shortcut.yml

+---
+title: Add Feature Flags Search Box shortcut
+merge_request: 40578
+author:
+type: changed

ee/spec/helpers/search_helper_spec.rb

@@ -51,6 +51,31 @@ RSpec.describe SearchHelper do
     end
   end
 
+  describe '#project_autocomplete' do
+    let(:user) { create(:user) }
+
+    before do
+      @project = create(:project, :repository)
+      allow(self).to receive(:current_user).and_return(user)
+    end
+
+    context 'with a licensed user' do
+      it "does not include feature flags" do
+        expect(project_autocomplete.find { |i| i[:label] == 'Feature Flags'} ).to be_nil
+      end
+    end
+
+    context 'with a licensed user' do
+      before do
+        stub_licensed_features(feature_flags: true)
+      end
+
+      it "does include feature flags" do
+        expect(project_autocomplete.find { |i| i[:label] == 'Feature Flags' }).to be_present
+      end
+    end
+  end
+
   describe '#search_entries_info_template' do
     let(:com_value) { true }
     let(:flag_enabled) { true }