test(ui): drop Settings from the 404 places

Settings is a tab of the Operate hub and not a destination of its own,
so the 404 page does not list it. Assert that it is absent.

Assisted-by: Claude Code:claude-sonnet-5-5 playwright
Signed-off-by: Ettore Di Giacinto <mudler@localai.io>

core/http/react-ui/e2e/not-found.spec.js

@@ -9,9 +9,11 @@ test.describe('404', () => {
     await expect(nf).toContainText('/app/no-such-page')
     await expect(nf.getByRole('link', { name: 'Go home' })).toHaveAttribute('href', '/app')
     const places = nf.getByRole('navigation', { name: 'Where to go' })
-    for (const name of ['Home', 'Models', 'Chat', 'Add-ons', 'Settings', 'Build', 'Operate']) {
+    for (const name of ['Home', 'Models', 'Chat', 'Add-ons', 'Build', 'Operate']) {
       await expect(places.getByRole('link', { name })).toBeVisible()
     }
+    // Settings is a tab of the Operate hub, so the places do not list it.
+    await expect(places.getByRole('link', { name: 'Settings' })).toHaveCount(0)
   })
 
   test('has no search, because the app has none to offer', async ({ page }) => {