first commit

src/utils/index.ts

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+/**
+ * 工具函数模块统一导出
+ */
+
+// 域计算工具
+export { paddedDomain, buildMinorTicks } from './domain'
+
+// 格式化工具
+export {
+  displayTime,
+  endpointFractionDigits,
+  formatEndpointTime,
+  formatAxisTime,
+  formatTooltipTime,
+  formatAnnotationTime,
+  formatPlainNumber,
+  formatScientificYAxisLabel,
+  formatTooltipNumber,
+  shouldUseScientificYAxisLabel,
+  type ScientificYAxisLabelOptions,
+  type TimeUnit,
+} from './formatters'
+
+// 几何计算工具
+export { resolveTrackGeometry, clamp, type TrackGeometry } from './geometry'