Test app
Renamed from sandbox to confirm the whole "Adding an app" process — a fresh service name, its own subdomain, and hub's SERVICE_URL_TEST_APP wiring — works end to end, not just the domain-auto-fill piece sandbox originally checked.
Renamed from sandbox to confirm the whole "Adding an app" process — a fresh service name, its own subdomain, and hub's SERVICE_URL_TEST_APP wiring — works end to end, not just the domain-auto-fill piece sandbox originally checked.