fix(chat): align a2ui assistant ID with deployed graph name #363

Job	Run time
Cockpit — build all examples	4m 52s
Website — lint / build	1m 50s
Library — lint / test / build	1m 18s
Cockpit — representative capability smoke	1m 21s
Cockpit — build / test	1m 40s
Cockpit — deploy smoke dry-run	1m 6s
Cockpit — e2e	2m 2s
Cockpit — secret-gated integration	1m 1s
Chat Agent — smoke	1m 21s
Website — e2e	2m 11s
Deploy → Vercel	0s
Production smoke	0s
	18m 42s

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