[IMP] website_sale_aplicoop: use virtual_available for stock check instead of qty_available

Use forecasted quantity (virtual_available) instead of on-hand quantity
(qty_available) for out-of-stock and low-stock calculations, so pending
incoming/outgoing moves are taken into account.

website_sale_aplicoop/models/product_extension.py

@@ -23,14 +23,14 @@ class ProductProduct(models.Model):
         string="Is Out of Stock",
         compute="_compute_stock_ribbons",
         store=False,
-        help="True if qty_available <= 0",
+        help="True if virtual_available <= 0",
     )
 
     is_low_stock = fields.Boolean(
         string="Is Low Stock",
         compute="_compute_stock_ribbons",
         store=False,
-        help="True if 0 < qty_available <= threshold",
+        help="True if 0 < virtual_available <= threshold",
     )
 
     dynamic_ribbon_id = fields.Many2one(
@@ -41,13 +41,13 @@ class ProductProduct(models.Model):
         help="Auto-assigned ribbon based on stock levels",
     )
 
-    @api.depends("qty_available", "type", "allow_out_of_stock_order")
+    @api.depends("virtual_available", "type", "allow_out_of_stock_order")
     def _compute_stock_ribbons(self):
         """Compute stock-based ribbons dynamically.
 
         A product is considered out of stock only when:
         - It is a storable product (type='consu')
-        - qty_available <= 0
+        - virtual_available <= 0
         - allow_out_of_stock_order is False
 
         If allow_out_of_stock_order is True, the product can always be sold
@@ -76,7 +76,7 @@ class ProductProduct(models.Model):
                 product.dynamic_ribbon_id = False
                 continue
 
-            qty = product.qty_available
+            qty = product.virtual_available
 
             # Check if product allows selling when out of stock
             # If True, never block add-to-cart based on stock