[FIX] point_of_sale: product not available in POS if not salable

When the box "Can be sold" on product.template is unticked, the
product must be unavailable in the point of sale.

Closes #22061
opw:1844188

addons/point_of_sale/models/product.py

@@ -21,6 +21,11 @@ class ProductTemplate(models.Model):
                 raise UserError(_('You cannot delete a product saleable in point of sale while a session is still opened.'))
         return super(ProductTemplate, self).unlink()
 
+    @api.onchange('sale_ok')
+    def _onchange_sale_ok(self):
+        if not self.sale_ok:
+            self.available_in_pos = False
+
 
 class ProductUomCateg(models.Model):
     _inherit = 'product.uom.categ'