When I create a page in next.js (app router), by default the components are server side rendered (i.e. they are created in the server). When in such a page I put a Link (form next/link) to navigate to another page I expect that since the next page it will be requested from the server and it will be loaded in the browser (and I will see the well known animation in the refresh icon of my browser), but it seems that when I do that the next page where I navigate is loaded by the client (I just think so because I don't see the animation to the refresh icon of my browser when I land to the new page). What's happening here?