Breadcrumb navigation with Schema.org markup

Original post: Breadcrumb navigation with Schema.org markup Series: Part of How this blog was built — documenting every decision that shaped this site. Breadcrumbs are one of those components that look simple but have several layers of correctness: the visual trail, the accessible markup, and the structured data for search engines. All three matter and only one of them is visible to users. Breadcrumb.astro handles all three, and it does so with a fallback auto-generation system that derives the