feat(health): 统一使用共享的HealthKit权限初始化方法并简化配置

将sleepHealthKit模块中的HealthKit权限初始化逻辑替换为使用health工具中的通用ensureHealthPermissions方法，移除重复的权限配置代码。同时更新后台任务标识符以保持一致性。

utils/sleepHealthKit.ts

@@ -1,5 +1,6 @@
 import dayjs from 'dayjs';
 import HealthKit from 'react-native-health';
+import { ensureHealthPermissions } from './health';
 
 // 睡眠阶段枚举
 export enum SleepStage {
@@ -59,34 +60,6 @@ export type CompleteSleepData = {
   recommendation: string;
 };
 
-// HealthKit 权限配置
-const permissions = {
-  permissions: {
-    read: [
-      HealthKit.Constants.Permissions.SleepAnalysis,
-      HealthKit.Constants.Permissions.HeartRate,
-    ],
-    write: [], // 我们只读取数据，不写入
-  },
-};
-
-/**
- * 初始化 HealthKit 权限
- */
-export const initializeHealthKit = (): Promise<boolean> => {
-  return new Promise((resolve, reject) => {
-    HealthKit.initHealthKit(permissions, (error: string) => {
-      if (error) {
-        console.error('[HealthKit] 权限初始化失败:', error);
-        reject(new Error(error));
-      } else {
-        console.log('[HealthKit] 权限初始化成功');
-        resolve(true);
-      }
-    });
-  });
-};
-
 /**
  * 创建睡眠日期范围 (从前一天 18:00 到当天 12:00)
  */
@@ -397,9 +370,7 @@ export const fetchCompleteSleepData = async (date: Date): Promise<CompleteSleepD
   try {
     console.log('[Sleep] 开始获取完整睡眠数据...', dayjs(date).format('YYYY-MM-DD'));
 
-    // 确保 HealthKit 已初始化
-    await initializeHealthKit();
-
+    await ensureHealthPermissions()
     // 获取睡眠样本
     const sleepSamples = await fetchSleepSamples(date);