new project stable version

lib/presentation/state/add_card_state.dart

@@ -0,0 +1,45 @@
+enum AddCardStatus { initial, loading, success, failure }
+
+class AddCardState {
+  final AddCardStatus status;
+  final String cardNumber;
+  final String expiryDate;
+  final String cvv;
+  final String cardHolder;
+  final String errorMessage;
+
+  const AddCardState({
+    this.status = AddCardStatus.initial,
+    this.cardNumber = '',
+    this.expiryDate = '',
+    this.cvv = '',
+    this.cardHolder = '',
+    this.errorMessage = '',
+  });
+
+  AddCardState copyWith({
+    AddCardStatus? status,
+    String? cardNumber,
+    String? expiryDate,
+    String? cvv,
+    String? cardHolder,
+    String? errorMessage,
+  }) {
+    return AddCardState(
+      status: status ?? this.status,
+      cardNumber: cardNumber ?? this.cardNumber,
+      expiryDate: expiryDate ?? this.expiryDate,
+      cvv: cvv ?? this.cvv,
+      cardHolder: cardHolder ?? this.cardHolder,
+      errorMessage: errorMessage ?? this.errorMessage,
+    );
+  }
+
+  bool get isFormValid {
+    final cleanCardNumber = cardNumber.replaceAll(' ', '');
+    return cleanCardNumber.length == 16 &&
+        expiryDate.length == 5 &&
+        cvv.length == 3 &&
+        cardHolder.trim().isNotEmpty;
+  }
+}