Three small follow-ups after the live-tail triplet wired up:
* evictOldest is now generic over (K extends string|number, V) so
the addAck / addTa1Ack call sites don't need a type assertion.
* Acks.test.tsx no longer spreads importOriginal() — TypeScript
was choking on the inferred 'unknown' from the mock factory.
Use the same ApiError / mock shape that Claims.test.tsx uses.
* tail-stream.test.ts guards the optional gen.return() with
so strict mode TS2722 stops complaining about possibly-undefined.
The Acks page needs the same live-tail triplet (useTailStream +
useMergedTail + TailStatusPill) that Claims/Remittances/Activity
already use. The first step is widening the TailResource union so
streamTail("acks") and streamTail("ta1_acks") are valid and the
URL falls out as /api/acks/stream and /api/ta1-acks/stream.
Two new tests assert the URL targets the new backend endpoints.
Nora
Tyler