Networking and server state

The app talks to its server through one typed ApiClient port whose only transport calls fetch with a deadline, checks every response against a valibot schema and never rejects; server data lives in TanStack Query's cache, defined once per resource in src/api/, read in model hooks, retried only when a retry can help, kept fresh by React Native focus and connectivity, and honest about offline. A zero-dependency checker proves it.

Rules that must hold