refactor(storage): 迁移 AsyncStorage 至 expo-sqlite/kv-store

- 统一替换所有 @react-native-async-storage/async-storage 导入为自定义 kvStore
- 新增 kvStore.ts 封装 expo-sqlite/kv-store，保持与 AsyncStorage 完全兼容
- 新增同步读写方法，提升性能
- 引入 expo-sqlite 依赖并更新 lock 文件

BREAKING CHANGE: 移除 @react-native-async-storage/async-storage 依赖，需重新安装依赖并清理旧数据

app/profile/edit.tsx

@@ -6,7 +6,7 @@ import { useCosUpload } from '@/hooks/useCosUpload';
 import { fetchMyProfile, updateUserProfile } from '@/store/userSlice';
 import { fetchMaximumHeartRate } from '@/utils/health';
 import { Ionicons } from '@expo/vector-icons';
-import AsyncStorage from '@react-native-async-storage/async-storage';
+import AsyncStorage from '@/utils/kvStore';
 import DateTimePicker from '@react-native-community/datetimepicker';
 import { Picker } from '@react-native-picker/picker';
 import { useFocusEffect } from '@react-navigation/native';

app/profile/goals.tsx

@@ -1,7 +1,7 @@
 import { HeaderBar } from '@/components/ui/HeaderBar';
 import { Colors } from '@/constants/Colors';
 import { useColorScheme } from '@/hooks/useColorScheme';
-import AsyncStorage from '@react-native-async-storage/async-storage';
+import AsyncStorage from '@/utils/kvStore';
 import * as Haptics from 'expo-haptics';
 import { useRouter } from 'expo-router';
 import React, { useEffect, useMemo, useState } from 'react';