structuredClone loses own __proto__ data properties

Description

The React Native structuredClone polyfill copies enumerable properties with ordinary assignment. For an own __proto__ data property on an object or array, assignment invokes the inherited prototype setter: the clone's prototype is replaced and no own property is created.

Expected behavior

__proto__ should be cloned as an ordinary own enumerable/writable/configurable data property with a deeply cloned value, while the clone keeps its normal Object or Array prototype. Native structuredClone follows this behavior.

React Native Version

0.87.1 and current main

Affected Platforms

JavaScript runtime - All

入口点是 React Native 的 structuredClone polyfill；首先使用拥有可枚举自有 proto 数据属性的对象和数组复现该问题。完成的标准是 clone 保留其正常的 Object 或 Array 原型，并拥有一个与原生 structuredClone 行为一致的深度克隆自有属性。