bootstrap.json's footer.paymentIcons referenced /assets/images/
mir-logo.svg, visa-logo.svg, mastercard-logo.svg - none of that
directory's files existed until the RC-02 placeholder fix, and these
three were still missing. Site-wide broken-image icons in every page
footer. Added neutral labeled-badge SVGs (not reproductions of the
actual trademarked logo artwork) at the exact referenced paths, plus
an onerror fallback on the footer <img> for defense in depth.
