feat: Add logger service and improve expense dialog with enhanced receipt management and calculation logic.

scripts/cleanup_images.dart

@@ -20,7 +20,7 @@ void main() async {
     if (stats['tripsWithImages'] > 0) {
       await tripImageService.cleanupUnusedImages(userId);
 
-      final newStats = await tripImageService.getImageStatistics(userId);
+      await tripImageService.getImageStatistics(userId);
     } else {}
   } catch (e) {
     exit(1);