deleteAvatarPayload static method
Deletes a saved avatar payload by its index.
Implementation
static Future<void> deleteAvatarPayload(int index) async {
final prefs = await SharedPreferences.getInstance();
final List<String> current = prefs.getStringList(_key) ?? [];
if (index >= 0 && index < current.length) {
current.removeAt(index);
await prefs.setStringList(_key, current);
}
}