Use a real enhanceable Settings URL, remove response-simulated navigation, and replace the one-shot public SSE endpoint with an initial canonical event plus ongoing server-owned updates. Keep a bounded one-event probe for production-reference tests.
req: examples/014
req: nav/001
req: nav/002
req: nav/004
req: push/003
Make the SaaS tutorial's settings route render a distinct full-page fallback while the enhanced handler still swaps the generated page panel and pushes history. This proves page-swap shape without relying only on the enhanced interaction path.
req: examples/001
req: page_swap/002