Sample reCAPTCHA-like fixture

This page exists to dogfood inspect_visual_challenge / solve_visual_challenge without ever calling Google. The iframe below mimics reCAPTCHA v2's image-grid layout: same iframe title attribute, same outer URL pattern, same internal DOM hooks (.rc-imageselect-desc, .rc-imageselect-table, #recaptcha-verify-button). Everything else is static markup — no third-party network call, no real challenge.

Hidden textarea below — the real reCAPTCHA writes the verification token here on success; our fixture writes a fake token after the Verify click so the solve tool can detect "passed".