Canonical content block with optional eyebrow kicker, title, and rich-text body — editorial copy sections, intro paragraphs, long-form prose. Variants: Default (params cover content width, heading layout/size/color, prose size/leading, eyebrow style) and Placeholders (same content plus a permissive placeholder below the prose for composing other renderings). The old Prose / Page Content / Title Only variants are retired aliases of Default.

• src/components/registry/components/ui/content-block.tsx→components/registry/components/ui/content-block.tsx
• src/components/registry/components/ui/content-block.recipe.ts→src/recipes/content-block.recipe.ts