Part B1+B2 of docs/FIPS-UPTIME-AND-UI-STATE-PLAN.md. Foundation for pages
that render instantly from cache on revisit and revalidate in the
background, instead of unmount-refetch-spinner on every navigation.
- stores/resources.ts: keyed {data, loadState, fetchedAt, error} entries
with sticky-ready (never regress ready→loading), keep-last-value on
error, per-key in-flight dedup, sessionStorage snapshot hydrate,
debounced invalidate() fan-out, optimistic-update-with-rollback
- composables/useCachedResource.ts: SWR hook over the store — synchronous
hydrate, TTL-gated background revalidate, revalidate-on-focus,
abort-on-unmount fetcher signal
- rpc-client: AbortSignal support (aborts pending retries too), opt-in
in-flight dedup keyed method+params, per-call maxRetries override
- 10 tests covering the SWR semantics
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
