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.

ios/digitalpilates/Info.plist

@@ -68,6 +68,7 @@
 	<key>UIBackgroundModes</key>
 	<array>
 		<string>processing</string>
+    <string>fetch</string>
 	</array>
 	<key>UILaunchStoryboardName</key>
 	<string>SplashScreen</string>