feat: send WhatsApp notification on PO confirmed

app/Http/Controllers/Purchase/PurchaseOrderController.php

@@ -8,6 +8,7 @@ use App\Models\PurchaseOrder;
 use App\Models\PurchaseOrderItem;
 use App\Models\PurchaseRequest;
 use App\Models\Supplier;
+use App\Notifications\Purchase\PurchaseOrderConfirmedNotification;
 use Illuminate\Http\Request;
 
 class PurchaseOrderController extends Controller
@@ -62,6 +63,10 @@ class PurchaseOrderController extends Controller
             ]);
         }
 
+        if ($order->supplier && $order->supplier->whatsapp_number) {
+            $order->supplier->notify(new PurchaseOrderConfirmedNotification($order));
+        }
+
         return redirect()->route('purchase.orders.show', $order)->with('success', 'Purchase order created successfully.');
     }