fix: use client-side ref to handle onclick string from transformerCopyButton

mdx-components.tsx

@@ -1,4 +1,5 @@
 import type { MDXComponents } from 'mdx/types'
+import { ClientButton } from '@/components/blog/button-client'
 
 export function getMDXComponents(components: MDXComponents): MDXComponents {
   return {
@@ -106,10 +107,9 @@ export function getMDXComponents(components: MDXComponents): MDXComponents {
     details: (props) => <details className="my-4 rounded-lg border border-border p-4" {...props} />,
     summary: (props) => <summary className="cursor-pointer font-semibold" {...props} />,
 
-    button: ({ children, onClick, ...props }) => (
-      typeof onClick === 'string'
-        ? <button {...props} dangerouslySetInnerHTML={{ __html: children as string }} onclick={onClick} />
-        : <button {...props} onClick={onClick}>{children}</button>
-    ),
+    button: ({ children, onClick, ...props }) => {
+      const onClickString = typeof onClick === 'string' ? onClick : undefined
+      return <ClientButton onClick={onClickString} {...props}>{children}</ClientButton>
+    },
   }
 }