AppRegistry mishandles keys inherited from Object.prototype

Description

The public AppRegistry stores app and section keys in plain object literals. Looking up an unregistered key such as constructor returns an inherited Object member. Registering the valid string key __proto__ mutates the registry prototype rather than creating an own entry, so the app/section key lists omit it.

The defect is present in React Native 0.87.1 and current main.

Steps to reproduce

Call AppRegistry.getRunnable("constructor"), then register an app or section named __proto__ and inspect getAppKeys() / getSectionKeys().

Expected behavior

Only explicitly registered keys should resolve, and all string app/section keys should be stored as ordinary own entries.

React Native Version

0.87.1 and current main.

从报告中提到的 AppRegistry 公共入口开始：getRunnable()、registerApp 或 section 注册，以及 getAppKeys()/getSectionKeys()。重现构造函数查找和 proto 注册的情况，然后检查键是如何存储和解析的。完成的标准是：未注册的继承名称无法解析，并且每个已注册的字符串键都出现在相应的键列表中。