docs/snippets/svelte/button-story-component-decorator.mdx.mdx
```md
<!-- Button.stories.mdx -->
import { Story, Meta } from '@storybook/addon-docs';
import Button from './Button.svelte';
import MarginDecorator from './MarginDecorator.svelte';
<Meta title="Button" component={Button} decorators={[() => MarginDecorator]}/>
<!-- Remainder story implementation -->
```