React 状态竞争修复
测试模型能否识别闭包旧值和函数式更新。
Prompt Content
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一个 React 组件里连续调用 setCount(count + 1) 三次，但界面只增加 1。请解释原因，并给出最小修复代码。要求说明为什么修复有效。
Use Cases
Reference Output
应使用 setCount(c => c + 1) 连续三次，因为函数式更新读取最新排队状态。
Scoring Rubric
看是否解释批处理与闭包旧值，并给出函数式更新。
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