Proxy-Mutationsfalle für Immutabilitäts-Tests in React Hooks

function createImmutableProxy(target, onError) {
  return new Proxy(target, {
    get(obj, prop) {
      const val = Reflect.get(obj, prop);
      if (val && typeof val === 'object') {
        return createImmutableProxy(val, onError);
      }
      return val;
    },
    set(obj, prop, value) {
      onError(new TypeError(`Direct mutation forbidden on property: ${String(prop)}`));
      return false;
    }
  });
}