Marketing pages now have language-specific social preview images

The previous marketing OG images were a single English asset reused across both locales. Spanish-language search results and social shares were getting English thumbnails, which felt slightly off-brand for anyone reading in Spanish.

Each main marketing page now ships with a locale-specific social preview image, served from absolute URLs so social platforms can fetch them reliably. English shares get the English thumbnail; Spanish shares get the Spanish thumbnail.

Small detail, real polish — the kind of thing that signals "this product knows where I am" before the reader even clicks through.