fix chat route

backend/chat/urls.py

@@ -1,6 +1,6 @@
-from django.urls import path
+from django.urls import path, re_path
 from . import views
 
 urlpatterns = [
-    path('product/<int:pk>', views.ProductChatView.as_view(), name='product-chat-view'),
+    re_path(r'^product/(?P<slug>[\w\u0600-\u06FF\-]+)$', views.ProductChatView.as_view(), name='product-chat-view'),
 ]

backend/chat/views.py

@@ -94,12 +94,12 @@ class ProductChatView(APIView):
     permission_classes = [IsAuthenticated]
     pagination_class = StructurePagination
 
-    def get(self, request, pk):
+    def get(self, request, slug):
         """
         Retrieve all messages for a product chat.
         """
         user = request.user
-        product = get_object_or_404(ProductModel, id=pk)
+        product = get_object_or_404(ProductModel, slug=slug)
         chat, created = ProductChatModel.objects.get_or_create(user=user, product=product)
 
         client = openai.OpenAI(api_key=settings.OPENAI_API_KEY)