Test file: drop step markers, regression explainers, and the lead
comment block that restated the contract; hoist the shared subscription
request body to a const; move Member mock defaults into the test that
uses them. Two it() cases unchanged.
Events page: drop WCAG comment that narrated what the
.past-toggle:focus-visible selector already says.
Two tests guarding the regression where /api/helcim/customer skipped
setPaymentBridgeCookie for $0 signups and left the user unable to
complete activation. Second test confirms the auth gate on
/api/helcim/subscription still rejects fresh unauthenticated calls.
