Mirrors dash.cloudflare.com/login: Turnstile API script is
loaded with ?render=explicit, and at navigation time the DOM
has no .cf-turnstile /
[data-sitekey] and no
challenges.cloudflare.com iframe.
Mode: submit-mount —
turnstile.render() is only invoked when the user clicks Log in; on solve the form auto-submits.
Toggle prerender via ?prerender=0
(switch to prerender).
Variant: default —
the standard sitekey used by the rest of the worker.
Toggle via ?variant=hard
(switch to hard sitekey).