Hi,
There is already a link on the product image on listings. So there is nothing to do in HikaShop for that.
You have some custom CSS coming from your template in the file :
/templates/jsn_glass_pro/ext/hikashop/jsn_ext_hikashop.css
In it, you have this CSS:
.hikashop_products_listing_main .hikashop_subcontainer .hikashop_product_image:before {
content: "";
position: absolute;
width: 100%;
height: 100%;
left: 0;
top: 0;
z-index: 99;
background: rgba(0,0,0,.6);
visibility: hidden;
opacity: 0;
filter: alpha(opacity=0);
-ms-filter: "progid:DXImageTransform.Microsoft.Alpha(Opacity=0)";
transition: all .3s ease-in-out;
-moz-transition: all .3s ease-in-out;
-webkit-transition: all .3s ease-in-out;
}
which does the hover effect on the product image and prevent the link on the image to work properly.
I would recommend to report the issue to your template provider support and see with them what they recommend to fix that.