wmzy / fetch-fun / 33793863311

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fix: 超时判别改 name 鸭子探测——applyTimeout/applyTotalTimeout 的 instanceof Error 判别在跨 realm 测试环境（vitest 内嵌 jsdom）失效：其 DOMException 原型链上的 Error 构造器与本模块 realm 的 Error 不是同一对象，instanceof 恒 false，降级包装不触发、原生 DOMException 裸漏给调用方；改为 name 判别（调用方已用自有信号中止范围限定，name 匹配不会误认外来错误），跨 realm 回归测试钉住

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