Fix devices_path route helper in native devices partial

The manage devices link used `devices_path` but the route is defined in
the saas engine, so it needs `saas.devices_path`.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

saas/app/views/notifications/settings/_native_devices.html.erb

@@ -5,7 +5,7 @@
     <p class="txt-small">
       You have <%= pluralize(Current.identity.devices.count, "mobile device") %> registered for push notifications.
     </p>
-    <%= link_to "Manage devices", devices_path, class: "btn txt-small" %>
+    <%= link_to "Manage devices", saas.devices_path, class: "btn txt-small" %>
   <% else %>
     <p class="txt-small color-secondary">
       No mobile devices registered. Install the iOS or Android app to receive push notifications on your phone.

saas/test/controllers/devices_controller_test.rb

@@ -25,6 +25,14 @@ class DevicesControllerTest < ActionDispatch::IntegrationTest
     assert_select "p", /No devices registered/
   end
 
+  test "show notification settings with registered devices" do
+    @identity.devices.create!(token: "test_token", platform: "apple", name: "iPhone 15 Pro")
+
+    get notifications_settings_path
+
+    assert_response :success
+  end
+
   test "index requires authentication" do
     sign_out