apply design-token markdown styling

src/components/markdown.tsx

@@ -133,17 +133,7 @@ export function Markdown(props: MarkdownProps) {
     })
   })
 
-  const proseClass = () => {
-    const classes = ["dark:prose-invert", "max-w-none", "prose-tight", "prose"]
-
-    // if (props.size === "tight") {
-    //   classes.push("prose-sm", "prose-tight")
-    // } else if (props.size === "sm") {
-    //   classes.push("prose-sm")
-    // }
-
-    return classes.join(" ")
-  }
+  const proseClass = () => "markdown-body"
 
   return <div ref={containerRef} class={proseClass()} innerHTML={html()} />
 }