Fixed error to function to create purchase order

src/app/pages/stock/stock.html

@@ -1,5 +1,5 @@
 <div class="flex mt-2">
-    @if (productIds.length) {
+    @if (productIds().length) {
         <app-modal-button #modalButtonPurchaseOrder
                           (click)="openPurchaseOrderForm()"
                           (ok)="onModalPurchaseOrderOk()"
@@ -8,7 +8,10 @@
                           name="Créer un bon de commande"
                           size="35%"
                           class="ml-4">
-            <app-create-purchaseorder-form #purchaseOrderForm [suppliers]="suppliers()"></app-create-purchaseorder-form>
+            <app-create-purchaseorder-form #purchaseOrderForm
+                                           [suppliers]="suppliers()"
+                                           [products]="selectedProducts()">
+            </app-create-purchaseorder-form>
         </app-modal-button>
 
         <app-modal-button #modalButtonQuotation
@@ -19,7 +22,9 @@
                           (click)="openQuotationForm()"
                           (ok)="onModalQuotationOk()"
                           (cancel)="onModalQuotationCancel()">
-            <app-create-quotation-form #quotationForm></app-create-quotation-form>
+            <app-create-quotation-form #quotationForm
+                                       [products]="selectedProducts()">
+            </app-create-quotation-form>
         </app-modal-button>
 
         <app-modal-button #modalButtonSupplier
@@ -30,13 +35,16 @@
                           (click)="openSupplierForm()"
                           (ok)="onModalSupplierOk()"
                           (cancel)="onModalSupplierCancel()">
-            <app-add-product-supplier-form #supplierForm [suppliers]="suppliers()"></app-add-product-supplier-form>
+            <app-add-product-supplier-form #supplierForm
+                                           [suppliers]="suppliers()"
+                                           [products]="selectedProducts()">
+            </app-add-product-supplier-form>
         </app-modal-button>
     }
 </div>
 
 <div class="mt-4">
-    <app-stock-table (selectionChange)="productIds = $event"
+    <app-stock-table (selectionChange)="onSelectionChange($event)"
                      (productsTables)="products.set($event)">
     </app-stock-table>
 </div>