/// PocketBase migration: `is_admin` on usersapp (admin vs normal accounts).
///
/// Admins can create test transactions in the app. Set the flag in Admin UI:
/// Users → pick user → is_admin = true.
///
/// Apply on the server:
///
///   sudo cp this_file /opt/pocketbase/pb_migrations/
///   sudo chown pocketbase:pocketbase /opt/pocketbase/pb_migrations/*.js
///   sudo -u pocketbase /opt/pocketbase/pocketbase migrate up
///   sudo systemctl restart pocketbase
migrate((app) => {
  const users = app.findCollectionByNameOrId("usersapp");
  if (users.fields.getByName("is_admin")) return;

  users.fields.add(new Field({
    type: "bool",
    name: "is_admin",
    required: false,
  }));
  app.save(users);
}, (app) => {
  try {
    const users = app.findCollectionByNameOrId("usersapp");
    const field = users.fields.getByName("is_admin");
    if (field) {
      users.fields.removeById(field.id);
      app.save(users);
    }
  } catch (_) {}
});