QueryClientProvider (30s staleTime, 1 retry) + Sonner Toaster at the
root. api.ts gains AbortSignal support and a default 30s timeout
(FE-24); query cancellation kills the stale-response races (FE-01,
FE-03). useBudget is now queries + mutations with targeted ['budget']
invalidation and success/error toasts on every mutation (ARCH-13,
UX-01); month navigation keeps the previous month visible while
fetching. Budget's transaction list is a cancellable query with
placeholder data; deferred-toggle gets feedback (UX-05); both panels
render a shared ErrorState with retry instead of failing silently.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
The new test job runs the 55-test pytest suite and pnpm typecheck
before the deploy job (needs: test) — a red suite now blocks prod.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>