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# 阶段4验收记录
## 1. 验收范围
- 性能优化:窗口 `resize` 事件处理节流/防抖
- 边界处理:屏宽异常值回退、末段裁剪
- 测试补齐:分段算法、子元素切片、刻度生成
## 2. 验收项对照
- [x] 启动后窗口可定位到 `(0, 0)`,并根据分段数量同步高度
- [x] 分段计算满足 `segmentCount = ceil(5000 / screenWidth)`
- [x] 最后一段宽度按剩余值裁剪,不越界
- [x] 子元素跨段切片显示连续,无丢失
- [x] 刻度覆盖 `0-5000`,小格 `10px`,大格 `100px`
- [x] resize 高频触发时,布局刷新使用 100ms 防抖,避免抖动
## 3. 自动化测试清单
- `src/services/segmentService.test.ts`
- `src/services/childSliceService.test.ts`
- `src/services/tickService.test.ts`
## 4. 执行命令
- `npm run test:run`
- `npm run build`
## 5. 结果
- 单元测试:通过
- 构建检查:通过
- 当前阶段结论阶段4完成可进入联调与发布准备