I am presenting the first working preview of the tool I created to install AUR packages directly from the AUR website. I named it Aurin and it adds an "Install Now" button on AUR package page to install it in a click.

After receiving a few suggestions on r/linux, I implemented it as an applciation handler protocol instead of a continuous running daemon. Also, the "Install Now" button is added to the View PKGBUILD page instead of the main, as some people pointed out that could be dangerous. So, you can now read the PKGBUILD before installing the package.

Polkit or ASKPASS?