runable

lib/core/constants/app_constants.dart

@@ -0,0 +1,26 @@
+/// Application-wide configuration constants
+class AppConstants {
+  AppConstants._();
+
+  // App Info
+  static const String appName = 'Retail POS';
+  static const String appVersion = '1.0.0';
+
+  // Defaults
+  static const String defaultCurrency = 'USD';
+  static const String defaultLanguage = 'en';
+  static const double defaultTaxRate = 0.0;
+
+  // Pagination
+  static const int defaultPageSize = 20;
+  static const int maxPageSize = 100;
+
+  // Cache
+  static const Duration cacheExpiration = Duration(hours: 24);
+  static const int maxCacheSize = 100;
+
+  // Business Rules
+  static const int minStockThreshold = 5;
+  static const int maxCartItemQuantity = 999;
+  static const double minTransactionAmount = 0.01;
+}