{# ProjectDetail related projects footer ("Projets similaires") Parameters: - previousProject (array|null): chronologically older neighbor - {title, slug, category, publishedAt, entity, mainImagePath?} - nextProject (array|null): chronologically newer neighbor - same shape as previousProject Modeled on components/_actualite-related-posts.html.twig, with the section title as the only editable field (cards are DB-driven, not editable) and `_project-detail-card.html.twig` instead of `_actualite_hub_card.html.twig` since neighbor cards show `category` (a Page column) rather than `tags` (Page<->Tag relations, an Actualité-only concept). #}