fix: align chat agent e2e stream assertions #34

Job	Run time
Library — lint / test / build	50s
Cockpit — representative capability smoke	46s
Cockpit — deploy smoke dry-run	39s
Cockpit — secret-gated integration	36s
Website — lint / build	56s
MCP — build / smoke	39s
Cockpit — build / test	57s
Website — e2e	1m 30s
Cockpit — e2e	1m 15s
Chat Agent — smoke	47s
Deploy → Vercel	5m 24s
	14m 19s

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