feat: 优化统计和步数详情页面，添加活动等级计算和展示，更新压力计组件以支持HRV值直接显示

utils/health.ts

@@ -465,7 +465,8 @@ async function fetchHeartRateVariability(options: HealthDataOptions): Promise<nu
 
       const latestHrv = res[res.length - 1];
       if (latestHrv && latestHrv.value) {
-        resolve(Math.round(latestHrv.value * 1000));
+        // HealthKit 中的 HRV 数据已经是毫秒单位，无需转换
+        resolve(Math.round(latestHrv.value));
       } else {
         resolve(null);
       }