copySensitive method
Copies text (a code or a setup key) marked sensitive where the
platform supports it, and clears it after
MfaClientOptions.clipboardExpiry (FR-FAC-05).
Android 13+ hides sensitive clips from previews and suggestions; iOS keeps the clip local (never Universal Clipboard) and expires it; the web clears it only when that is possible without a permission prompt. Other apps can still read the clipboard until it is cleared.
Implementation
Future<void> copySensitive(String text) {
_checkOpen();
return _platform.copySensitive(text, expiry: _options.clipboardExpiry);
}