GameDetailViewModel resolves INavigationService from DI, and
GameDetailView.axaml references the MultiplyConverter declared in the
real App.axaml. Neither was present in the test harness, so both
GameDetailView layout tests threw before producing a screenshot.
Register the real NavigationService and mirror the MultiplyConverter
into TestApp so the views render. Baselines still need a fresh CI
capture since these tests never previously rendered.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
