refactor: rename ChatAgent → Agent across the contract surface (#137) #414

Job	Run time
Website — e2e	2m 22s
Cockpit — deploy smoke dry-run	1m 14s
Cockpit — secret-gated integration	1m 15s
Library — lint / test / build	2m 2s
Chat Agent — smoke	1m 31s
Cockpit — e2e	2m 11s
Cockpit — build / test	1m 37s
Website — lint / build	2m 10s
Cockpit — build all examples	4m 48s
Cockpit — representative capability smoke	1m 29s
Deploy → Vercel	5m 52s
Production smoke	2m 28s
	28m 59s

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