fix: correct button override to spread all props and avoid nested buttons

mdx-components.tsx

@@ -106,27 +106,10 @@ 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} />,
 
-    // Buttons (handle onclick string from transformerCopyButton)
-    button: ({ children, onClick, ...props }: { children?: React.ReactNode; onClick?: string | (() => void); className?: string } & Record<string, unknown>) => {
-      if (typeof onClick === 'string') {
-        const className = (props.className as string) ?? '';
-        return (
-          <button
-            dangerouslySetInnerHTML={{
-              __html: `<button${className ? ` class="${className.replace(/"/g, '&quot;')}"` : ''} onclick="${onClick}">${(children as string) ?? ''}</button>`
-            }}
-            suppressHydrationWarning
-          />
-        );
-      }
-      return (
-        <button
-          {...props}
-          onClick={typeof onClick === 'function' ? onClick : undefined}
-        >
-          {children}
-        </button>
-      );
-    },
+    button: ({ children, onClick, ...props }) => (
+      typeof onClick === 'string'
+        ? <button {...props} dangerouslySetInnerHTML={{ __html: children as string }} onclick={onClick} />
+        : <button {...props} onClick={onClick}>{children}</button>
+    ),
   }
 }