`main` is red. 68518c1f9b added a dedicated `renderTypingSync` harness for the
typing-aware deferral tests, but its params object omits `updateSessionState`,
which `BackgroundSyncParams` requires:
src/app/contrib/hooks/use-background-sync.test.ts(660,25): error TS2345:
Property 'updateSessionState' is missing in type '{ ... }' but required
in type 'BackgroundSyncParams'.
`npm run typecheck` exits 2, so `apps/desktop :: check:lint` fails and the
JS & TS checks job goes red on every open PR regardless of its contents.
Vitest did not catch this because it transpiles without typechecking, so the
new suite passes while `tsc -p .` fails.
Supply the missing prop. The updater runs against a throwaway state — this
harness never exercises the transcript path — and it is added to the existing
`stable` object rather than inline, because the harness's own comment requires
every param to keep a stable identity across the tick-driven re-renders; a
fresh `vi.fn()` per render would re-run the connect-reseed effect and
re-subscribe the throttle, polluting the very counts the tests observe.
Verified: all three tsc projects clean (`tsc -p .`, `tsconfig.electron.json`,
`tsconfig.e2e.json`), use-background-sync suites 26/26, eslint clean.
Trevor Nash-Keller
15b673d178