lib/learner-store/learner-store

The signed-in learner's state as the browser holds it.

The one client store of learner state, read by the composition-root hooks and written by the learner-store adapters.

Adopts the snapshot the server loaded for this request.

Empties the store, as for a signed-out visitor.

Applies a change at once, then keeps it only if the server accepts it.