mobile-emulator-test — Native build QA on Android emulator + MCP loop

End-to-end verification of any native mobile build through a real Android emulator session, with backend truth (Supabase MCP) and crash telemetry (Sentry MCP) wired into the same loop. Catches the failure modes that pure unit tests and CI bundle builds miss: white screens, prototype-stripped cache rehydration, missing migrations, sync-disabled empty states, infinite refetch loops, and silent error swallows.

Critical Rules

Test as a real signed-in user AND as a brand-new guest. Walk the app the way a paying customer would — sign in, browse every tab, add a real entry, edit it, delete it — AND the way a new user would — open the app fresh, hit the guest path, drive a CRUD round-trip without any account. Both paths exercise different code (sync replica vs cloud direct vs local-only adapter) and both regress independently. While walking, watch logcat, Sentry, and the DB at the same time.