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/NutritionRadarCard.tsx

@@ -210,6 +210,7 @@ const styles = StyleSheet.create({
     shadowOpacity: 0.1,
     shadowRadius: 3.84,
     elevation: 5,
+    marginTop: 12
   },
   cardHeader: {
     flexDirection: 'row',
@@ -300,7 +301,7 @@ const styles = StyleSheet.create({
     gap: 4,
   },
   mainValue: {
-    fontSize: 12,
+    fontSize: 14,
     fontWeight: '600',
     color: '#192126',
   },
@@ -320,7 +321,7 @@ const styles = StyleSheet.create({
     fontWeight: '500',
   },
   calculationValue: {
-    fontSize: 9,
+    fontSize: 11,
     fontWeight: '700',
     color: '#192126',
   },