feat: 更新用户资料编辑功能及相关组件

- 在 EditProfileScreen 中新增活动水平字段，支持用户设置和保存活动水平
- 更新个人信息卡片，增加活动水平的展示和编辑功能
- 在 ProfileCard 组件中优化样式，提升用户体验
- 更新 package.json 和 package-lock.json，新增 @react-native-picker/picker 依赖
- 在多个组件中引入 expo-image，优化图片加载和展示效果

app/(tabs)/personal.tsx

@@ -8,8 +8,9 @@ import { DEFAULT_MEMBER_NAME, fetchActivityHistory, fetchMyProfile } from '@/sto
 import { Ionicons } from '@expo/vector-icons';
 import { useBottomTabBarHeight } from '@react-navigation/bottom-tabs';
 import { useFocusEffect } from '@react-navigation/native';
+import { Image } from 'expo-image';
 import React, { useEffect, useMemo, useState } from 'react';
-import { Alert, Image, Linking, ScrollView, StatusBar, StyleSheet, Switch, Text, TouchableOpacity, View } from 'react-native';
+import { Alert, Linking, ScrollView, StatusBar, StyleSheet, Switch, Text, TouchableOpacity, View } from 'react-native';
 import { SafeAreaView, useSafeAreaInsets } from 'react-native-safe-area-context';
 
 const DEFAULT_AVATAR_URL = 'https://plates-1251306435.cos.ap-guangzhou.myqcloud.com/images/avatar/avatarGirl01.jpeg';
@@ -110,8 +111,11 @@ export default function PersonalScreen() {
         <View style={styles.userInfoContainer}>
           <View style={styles.avatarContainer}>
             <Image
-              source={{ uri: userProfile.avatar || DEFAULT_AVATAR_URL }}
+              source={userProfile.avatar || DEFAULT_AVATAR_URL}
               style={styles.avatar}
+              contentFit="cover"
+              transition={200}
+              cachePolicy="memory-disk"
             />
           </View>
           <View style={styles.userDetails}>