Refactor components and enhance background task management

- Updated font sizes and weights in BasalMetabolismCard, MoodCard, HealthDataCard, and NutritionRadarCard for improved readability.
- Removed loading state from MoodCard to simplify the component.
- Adjusted styles in WeightHistoryCard for better layout and spacing.
- Integrated expo-background-fetch for improved background task handling.
- Updated Info.plist to include background fetch capability.
- Enhanced background task registration and execution logic in backgroundTaskManager.
- Added debug function to manually trigger background task execution for testing purposes.

app/(tabs)/goals.tsx

@@ -23,6 +23,7 @@ import { useFocusEffect } from '@react-navigation/native';
 import dayjs from 'dayjs';
 import * as Haptics from 'expo-haptics';
 import { LinearGradient } from 'expo-linear-gradient';
+import Lottie from 'lottie-react-native';
 import React, { useCallback, useEffect, useRef, useState } from 'react';
 import { Alert, FlatList, Image, RefreshControl, SafeAreaView, StatusBar, StyleSheet, Text, TouchableOpacity, View } from 'react-native';
 
@@ -384,11 +385,12 @@ export default function GoalsScreen() {
         borderBottomLeftRadius: 24,
         borderBottomRightRadius: 24,
       }}>
-        {/* 右下角图片 */}
-        <Image
-          source={require('@/assets/images/task/imageTodo.png')}
+        {/* 右下角Lottie动画 */}
+        <Lottie
+          source={require('@/assets/lottie/Goal.json')}
           style={styles.bottomRightImage}
-          resizeMode="contain"
+          autoPlay
+          loop
         />
       </View>
 
@@ -716,10 +718,10 @@ const styles = StyleSheet.create({
   },
   bottomRightImage: {
     position: 'absolute',
-    top: 56,
+    top: 40,
     right: 36,
-    width: 80,
-    height: 80,
+    width: 120,
+    height: 120,
   },
   // 任务进度卡片中的按钮样式
   cardHeaderButtons: {