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.

components/MoodCard.tsx

@@ -10,7 +10,7 @@ interface MoodCardProps {
   isLoading?: boolean;
 }
 
-export function MoodCard({ moodCheckin, onPress, isLoading = false }: MoodCardProps) {
+export function MoodCard({ moodCheckin, onPress }: MoodCardProps) {
   const moodConfig = moodCheckin ? getMoodConfig(moodCheckin.moodType) : null;
   const animationRef = useRef<LottieView>(null);
 
@@ -21,7 +21,7 @@ export function MoodCard({ moodCheckin, onPress, isLoading = false }: MoodCardPr
   }, []);
 
   return (
-    <TouchableOpacity onPress={onPress} style={styles.moodCardContent} disabled={isLoading}>
+    <TouchableOpacity onPress={onPress} style={styles.moodCardContent} >
       <View style={styles.moodCardHeader}>
         <Text style={styles.cardTitle}>心情</Text>
         <LottieView
@@ -32,11 +32,7 @@ export function MoodCard({ moodCheckin, onPress, isLoading = false }: MoodCardPr
           style={styles.lottieAnimation}
         />
       </View>
-      {isLoading ? (
-        <View style={styles.moodPreview}>
-          <Text style={styles.moodLoadingText}>加载中...</Text>
-        </View>
-      ) : moodCheckin ? (
+      {moodCheckin ? (
         <View style={styles.moodPreview}>
           <Text style={styles.moodPreviewText}>
             {moodConfig?.label || moodCheckin.moodType}
@@ -69,8 +65,8 @@ const styles = StyleSheet.create({
   },
 
   lottieAnimation: {
-    width: 40,
-    height: 40,
+    width: 30,
+    height: 30,
   },
 
   moodPreview: {