Scenario: Form submits to real intermediate "Processing..." page that shows spinner, then redirects
Expected Behavior: POST → Real processing page loads → Spinner shows → Meta refresh after 3s → Thank-you page
PRD Reference: AC-1.4.3
Future Use: This page will be used to test whether the ListenLayer tracking script can capture form data when real intermediate processing pages are used.
Note: This form submits to a REAL intermediate processing page (not simulated in DOM). The processing page shows a spinner and uses meta refresh to complete the redirect.