/**
 * Copy, cut, paste and select-all inside an editor-hosted frame.
 *
 * An editor built on Electron — VS Code and its relatives — answers Cmd/Ctrl+C
 * from the application menu rather than leaving it to the browser. For a
 * webview the editor turns it into `execCommand('copy')` against the webview's
 * own document, and the Explorer runs one level deeper, in a cross-origin
 * frame that document cannot reach. The command finds no selection there, so
 * the shortcut lands nowhere and the page looks like it forbids copying.
 *
 * The key event itself does arrive here — a key event doesn't cross origins,
 * which is also why the editor never sees it — so the frame is free to answer
 * the shortcuts itself. Only when framed inside such a host: an ordinary
 * browser already does all of this, natively and better.
 */
export declare function initHostClipboard(): () => void;