Added components to article

lib/model/component.dart

@@ -0,0 +1,34 @@
+import 'package:hl_lieferservice/dto/component.dart';
+
+class Component {
+  Component({
+    required this.articleNumber,
+    required this.name,
+    required this.quantity,
+    required this.position,
+    this.scannedAmount = 0,
+  });
+
+  final String articleNumber;
+  final String name;
+  final double quantity;
+  final double position;
+
+  int scannedAmount;
+
+  /// Required scan count derived from BOM quantity (e.g. 7.0 → 7).
+  int get requiredAmount => quantity.ceil();
+
+  bool get isFullyScanned => scannedAmount >= requiredAmount;
+
+  bool get needsScanning => scannedAmount < requiredAmount;
+
+  factory Component.fromDTO(ComponentDTO dto) {
+    return Component(
+      articleNumber: dto.articleNr,
+      name: dto.name,
+      quantity: double.tryParse(dto.quantity) ?? 0.0,
+      position: double.tryParse(dto.pos) ?? 0.0,
+    );
+  }
+}