fix(chat): isGenuiTurn walks back through messages (LangGraph in-plac… #684

Job	Run time
Cockpit — representative capability smoke	1m 39s
Library — lint / test / build	3m 18s
Cockpit — secret-gated integration	1m 14s
Cockpit — build / test	1m 42s
Website — lint / build	2m 0s
Website — e2e	2m 27s
Cockpit — deploy smoke dry-run	1m 35s
Cockpit — e2e	6m 22s
examples/chat — python smoke	1m 41s
Cockpit — build all examples	4m 58s
Deploy → Vercel	10m 22s
Production smoke	5m 7s
	42m 25s

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