Page-heading control for copying the current page's generated markdown.

Data Source

• useCopyPageMarkdown
• themeConfig.text

Behavior

• omitted when page markdown copying is unavailable
• exposes idle, success, and error states
• disables interaction until the client is ready
• updates its icon for each copy state
• uses the localized theme text labels for button content

State Labels

• idle: copyPage
• success: copiedPage
• error: copyFailedPage