Async UI State Machine

Write createViewState() — a tiny state machine for an async view. It RETURNS { get, load }: - state starts as { status: "idle" } - load(fetchFn) sets { status: "loading" }, awaits fetchFn() - success → { status: "success", data } - failure → { status: "error", message } (err.message) - get() returns the CURRENT state object (a new object each call is fine) - calling load again while one is in flight is allowed — the LAST call wins (stale completions must not overwrite the newer state)

Difficulty: intermediate