{"data":[{"id":"ch_042","slug":"stale-cart-total","title":"购物车总价偶尔回到旧值","summary":"快速修改商品数量时，较早返回的请求覆盖了最新购物车快照。","difficulty":"medium","category":"状态管理","stack":"React","xpReward":240,"expectedMinutes":35,"attemptCount":1248,"passRate":38},{"id":"ch_019","slug":"duplicate-order-request","title":"重复请求让订单创建两次","summary":"支付按钮在弱网环境下触发两次请求，产生重复订单。","difficulty":"hard","category":"异步并发","stack":"Node.js","xpReward":420,"expectedMinutes":55,"attemptCount":903,"passRate":17},{"id":"ch_008","slug":"end-date-boundary","title":"日期筛选漏掉当天最后一条","summary":"结束日期转换时丢失时区信息，导致部分数据未被包含。","difficulty":"easy","category":"边界条件","stack":"TypeScript","xpReward":120,"expectedMinutes":15,"attemptCount":2180,"passRate":71}],"meta":{"page":1}}