Added components to article

lib/feature/delivery/repository/tour_repository.dart

@@ -92,6 +92,48 @@ class TourRepository {
     }
   }
 
+  /// Scan a single BOM component locally.  The server-side `scanArticle` call
+  /// for the parent article is deferred until **every** component of the
+  /// parent is fully scanned — only then does the parent count as loaded.
+  Future<ScanResult> scanComponent(
+    String deliveryId,
+    String carId,
+    String componentArticleNumber,
+  ) async {
+    if (!_tourStream.hasValue) {
+      throw TourNotFoundException();
+    }
+
+    final tour = _tourStream.value!;
+    final delivery = tour.deliveries.firstWhere(
+      (d) => d.id == deliveryId,
+    );
+
+    // Locate the parent article and the matching component.
+    final parentArticle = delivery.findParentOfComponent(
+      componentArticleNumber,
+    );
+    if (parentArticle == null) return ScanResult.notFound;
+
+    final component = parentArticle.findComponent(componentArticleNumber)!;
+
+    if (component.isFullyScanned) return ScanResult.alreadyScanned;
+
+    // ── Local-only increment ──
+    component.scannedAmount += 1;
+
+    // ── When every component is done, sync the parent with the server ──
+    if (parentArticle.isFullyScanned) {
+      await service.scanArticle(parentArticle.internalId.toString());
+      parentArticle.scannedAmount += 1;
+      delivery.carId = int.tryParse(carId) ?? delivery.carId;
+      await service.assignCar(deliveryId, carId);
+    }
+
+    _tourStream.add(tour);
+    return ScanResult.scanned;
+  }
+
   Future<void> unscan(
     String deliveryId,
     String articleId,