feat: 新增体重记录功能，优化用户资料更新及图片组件缓存

app/(tabs)/coach.tsx

@@ -2,13 +2,13 @@ import { Ionicons } from '@expo/vector-icons';
 import { BlurView } from 'expo-blur';
 import * as Haptics from 'expo-haptics';
 import * as ImagePicker from 'expo-image-picker';
+import { LinearGradient } from 'expo-linear-gradient';
 import { useLocalSearchParams } from 'expo-router';
 import React, { useCallback, useEffect, useMemo, useRef, useState } from 'react';
 import {
   ActivityIndicator,
   Alert,
   FlatList,
-  Image,
   Keyboard,
   Modal,
   Platform,
@@ -34,7 +34,7 @@ import { loadAiCoachSessionCache, saveAiCoachSessionCache } from '@/services/aiC
 import { api, getAuthToken, postTextStream } from '@/services/api';
 import { selectLatestMoodRecordByDate } from '@/store/moodSlice';
 import { generateWelcomeMessage, hasRecordedMoodToday } from '@/utils/welcomeMessage';
-import { LinearGradient } from 'expo-linear-gradient';
+import { Image } from 'expo-image';
 import { HistoryModal } from '../../components/model/HistoryModal';
 import { ActionSheet } from '../../components/ui/ActionSheet';
 
@@ -1902,8 +1902,9 @@ export default function CoachScreen() {
             }}
           >
             <Image
-              source={require('@/assets/images/icons/iconFlash.png')}
+              source={{ uri: 'https://plates-1251306435.cos.ap-guangzhou.myqcloud.com/images/icons/icon-profile-fish.png' }}
               style={styles.usageIcon}
+              cachePolicy="memory-disk"
             />
             <Text style={styles.usageText}>
               {userProfile?.isVip ? '不限' : `${userProfile?.freeUsageCount || 0}/${userProfile?.maxUsageCount || 0}`}