Hi,
Thank you for the suggestion. That's a nice example.
HikaShop has a setting called "URL where you will be redirected when the cart is empty" in the Cart section of the configuration page (System > Configuration > Cart). You can set it to any URL on your site.
If left empty, HikaShop redirects to the default shop page. You could point it to a custom Joomla article that displays a "Continue shopping" message with a link and a HikaShop content module showing product recommendations (bestsellers, latest products, etc.). See the configuration documentation:
www.hikashop.com/support/documentation/5...onfig.html#main_cart
The "Undo" functionality (restoring a removed product) would be a more significant feature to implement. We'll add it to our feature request list for future consideration.