feat(app): implement Product Scan review flow, dynamic batch expiry picker, custom PDFs, PO relationships, and aligned card layouts

lib/features/splash/splash_screen.dart

@@ -68,12 +68,12 @@ class _SplashScreenState extends ConsumerState<SplashScreen> with SingleTickerPr
                   color: AppConfig.primaryColor // Changed fallback icon color
                 ),
               ),
-              const SizedBox(height: 24),
+              const SizedBox(height: AppConfig.spaceXL),
               Text(
                 AppConfig.appName,
                 style: AppConfig.h1.copyWith(color: AppConfig.primaryColor), // Red text
               ),
-              const SizedBox(height: 8),
+              const SizedBox(height: AppConfig.spaceSmall),
               Text(
                 'PT. Primafood International',
                 style: AppConfig.bodyMedium.copyWith(color: AppConfig.textSecondary), // Grey text