Every conversion CTA reads "Try Hanzo" and goes to sign-in; payment comes
after it. The landing's close now does that in place of "Choose plan".
It no longer fires plan_clicked: it is not a plan choice, and the page view
and the $click that <Hanzo> autocaptures already record it. That leaves the
EVENTS re-export in @hanzo/docs-analytics with no caller, so it goes too.