Post-refactor, WelcomeRouter and the Step1/Step2 "Skip-the-rest" handlers
navigate to /home, but the MemoryRouter test stubs still mounted the
"dashboard" marker at /. Update the stub routes (and matching it() titles)
so the assertions resolve.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
