feat(chat): A2UI surface store per-component readiness (PR A) #796

Job	Run time
Cockpit — build all examples	5m 8s
examples/chat — python smoke	1m 34s
Cockpit — secret-gated integration	1m 24s
Website — e2e	6m 31s
Cockpit — e2e	2m 51s
Cockpit — representative capability smoke	1m 30s
Cockpit — build / test	1m 52s
Website — lint / build	2m 14s
Cockpit — deploy smoke dry-run	1m 25s
Library — lint / test / build	3m 39s
Deploy → Vercel	0s
Production smoke	0s
	28m 8s

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