#Variable: $app

const $app: "Quantumult X" | "Loon" | "Shadowrocket" | "Egern" | "Surge" | "Stash" | "Worker" | "Node.js"

当前运行平台名称（脚本平台优先，模块系统次之）。 Current runtime platform name (script platform first, module system second).

识别顺序: Detection order:

1. $task -> Quantumult X
2. $loon -> Loon
3. $rocket -> Shadowrocket
4. Egern -> Egern
5. $environment["surge-version"] -> Surge
6. $environment["stash-version"] -> Stash
7. Cloudflare -> Worker
8. process.versions.node -> Node.js
9. 默认回落 -> undefined default fallback -> undefined

说明: Notes:

• 使用 'key' in globalThis，避免 Object.keys 对不可枚举全局变量漏检。
• Use 'key' in globalThis to avoid missing non-enumerable globals with Object.keys.