Fix base2-free to allow deepseek/kimi #560

Job	Run time
build-and-smoke-freebuff-windows	2m 8s
build-freebuff	1m 20s
e2e-version	15s
e2e-help-command	15s
e2e-terminal-command	52s
e2e-code-edit	9s
e2e-agent-startup	17s
e2e-startup	16s
e2e-slash-commands	1m 1s
e2e-ads-behavior	9s
	6m 42s

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