feat(health): 完善HealthKit权限管理和数据获取系统

- 重构权限管理，新增SimpleEventEmitter实现状态监听
- 实现完整的健身圆环数据获取（活动热量、锻炼时间、站立小时）
- 优化组件状态管理，支持实时数据刷新和权限状态响应
- 新增useHealthPermissions Hook，简化权限状态管理
- 完善iOS原生代码，支持按小时统计健身数据
- 优化应用启动时权限初始化流程，避免启动弹窗

BREAKING CHANGE: FitnessRingsCard组件API变更，移除手动传参改为自动获取数据

components/FitnessRingsCard.tsx

@@ -1,20 +1,14 @@
-import React from 'react';
+import React, { useState, useCallback, useRef } from 'react';
 import { StyleSheet, Text, View, TouchableOpacity } from 'react-native';
 import { router } from 'expo-router';
+import { useFocusEffect } from '@react-navigation/native';
 import { CircularRing } from './CircularRing';
 import { ROUTES } from '@/constants/Routes';
+import { fetchActivityRingsForDate, ActivityRingsData } from '@/utils/health';
 
 type FitnessRingsCardProps = {
   style?: any;
-  // 活动卡路里数据
-  activeCalories?: number;
-  activeCaloriesGoal?: number;
-  // 锻炼分钟数据
-  exerciseMinutes?: number;
-  exerciseMinutesGoal?: number;
-  // 站立小时数据
-  standHours?: number;
-  standHoursGoal?: number;
+  selectedDate?: Date;
   // 动画重置令牌
   resetToken?: unknown;
 };
@@ -24,14 +18,48 @@ type FitnessRingsCardProps = {
  */
 export function FitnessRingsCard({
   style,
-  activeCalories = 25,
-  activeCaloriesGoal = 350,
-  exerciseMinutes = 1,
-  exerciseMinutesGoal = 5,
-  standHours = 2,
-  standHoursGoal = 13,
+  selectedDate,
   resetToken,
 }: FitnessRingsCardProps) {
+  const [activityData, setActivityData] = useState<ActivityRingsData | null>(null);
+  const [loading, setLoading] = useState(false);
+  const loadingRef = useRef(false);
+
+  // 获取健身圆环数据 - 在页面聚焦、日期变化、从后台切换到前台时触发
+  useFocusEffect(
+    useCallback(() => {
+      const loadActivityData = async () => {
+        if (!selectedDate) return;
+
+        // 防止重复请求
+        if (loadingRef.current) return;
+
+        try {
+          loadingRef.current = true;
+          setLoading(true);
+          const data = await fetchActivityRingsForDate(selectedDate);
+          setActivityData(data);
+        } catch (error) {
+          console.error('FitnessRingsCard: 获取健身圆环数据失败:', error);
+          setActivityData(null);
+        } finally {
+          setLoading(false);
+          loadingRef.current = false;
+        }
+      };
+
+      loadActivityData();
+    }, [selectedDate])
+  );
+
+  // 使用获取到的数据或默认值
+  const activeCalories = activityData?.activeEnergyBurned ?? 0;
+  const activeCaloriesGoal = activityData?.activeEnergyBurnedGoal ?? 350;
+  const exerciseMinutes = activityData?.appleExerciseTime ?? 0;
+  const exerciseMinutesGoal = activityData?.appleExerciseTimeGoal ?? 30;
+  const standHours = activityData?.appleStandHours ?? 0;
+  const standHoursGoal = activityData?.appleStandHoursGoal ?? 12;
+
   // 计算进度百分比
   const caloriesProgress = Math.min(1, Math.max(0, activeCalories / activeCaloriesGoal));
   const exerciseProgress = Math.min(1, Math.max(0, exerciseMinutes / exerciseMinutesGoal));
@@ -95,24 +123,42 @@ export function FitnessRingsCard({
         <View style={styles.dataContainer}>
           <View style={styles.dataRow}>
             <Text style={styles.dataText}>
-              <Text style={styles.dataValue}>{Math.round(activeCalories)}</Text>
-              <Text style={styles.dataGoal}>/{activeCaloriesGoal}</Text>
+              {loading ? (
+                <Text style={styles.dataValue}>--</Text>
+              ) : (
+                <>
+                  <Text style={styles.dataValue}>{Math.round(activeCalories)}</Text>
+                  <Text style={styles.dataGoal}>/{activeCaloriesGoal}</Text>
+                </>
+              )}
             </Text>
             <Text style={styles.dataUnit}>千卡</Text>
           </View>
 
           <View style={styles.dataRow}>
             <Text style={styles.dataText}>
-              <Text style={styles.dataValue}>{Math.round(exerciseMinutes)}</Text>
-              <Text style={styles.dataGoal}>/{exerciseMinutesGoal}</Text>
+              {loading ? (
+                <Text style={styles.dataValue}>--</Text>
+              ) : (
+                <>
+                  <Text style={styles.dataValue}>{Math.round(exerciseMinutes)}</Text>
+                  <Text style={styles.dataGoal}>/{exerciseMinutesGoal}</Text>
+                </>
+              )}
             </Text>
             <Text style={styles.dataUnit}>分钟</Text>
           </View>
 
           <View style={styles.dataRow}>
             <Text style={styles.dataText}>
-              <Text style={styles.dataValue}>{Math.round(standHours)}</Text>
-              <Text style={styles.dataGoal}>/{standHoursGoal}</Text>
+              {loading ? (
+                <Text style={styles.dataValue}>--</Text>
+              ) : (
+                <>
+                  <Text style={styles.dataValue}>{Math.round(standHours)}</Text>
+                  <Text style={styles.dataGoal}>/{standHoursGoal}</Text>
+                </>
+              )}
             </Text>
             <Text style={styles.dataUnit}>小时</Text>
           </View>