hexamya/digikala-currency-converter — reverse-engineered prompt

Build me a simple browser extension for Digikala that automatically shows the USD value under product prices that are listed in Toman. I want it to feel native on the page, not messy or intrusive, and it should keep the original price visible with the converted dollar amount right below it.

Please use a live USD to IRR rate from Nobitex, but cache it locally for about 10 minutes so it stays fast and does not keep hitting the API. Digikala loads content dynamically, so make sure it still works when I browse around the site, open product pages, or when more items load in without a full refresh. It should also look fine in both light mode and dark mode.

Keep it privacy friendly, only use storage for the rate cache, and don’t track anything. I want it to be something I can load manually into Chrome, Brave, or Edge as an unpacked extension. If you need anything, check the current docs online.