Previews fails if user is not logged into the frontend

The LupusCSR theme solution adds quite some additional complexity, since it is requiring both the theme and a nuxt server to be there and working.

Let's explore other options to find somehing simpler:

Option A) Use client-side rendering for preview routes and directly access the backend API, so he cookie is sent. Needs the working CORS setup and might face some problems with privacy-aware browsers not sending the cookie to a 3rd party cookie domain

Option B) add a drupal /proxy/, which proxies the frontend SSR and displays the frontend under the backend domain. This needs some JS/CSS rewriting for the new base URL so they are loaded from an absolute path..

Optiona A would be probably the simplest, since it is re-using things which are already exising, the CORS submodule and CSR feature of nuxt. Let's give it some test with latest browsers. With chrome not killing 3rd party cookies this might be good enough.

Test of option A was quite positiv, tested both latest firefox and chrome, with default privcacy options (firefox) enabled + an active adblocker. No problems a all, when nuxt ssr is set to false, CSR kicks in and the preview works just fine.

Thus, option A is viable! We need to make sure the frontend applies CSR and disables the server-proxy for the preview routes so the API communication happens direct. We can set some custom route-rule for CSR, for the disabling of the server-proxy we miss he per route option. So this might need some work in nuxtjs-drupal-ce to make it work.

ok, this is completed and ready to be tested. Here is the change with the update, which shall fix this.
https://github.com/drunomics/lupus-decoupled-nuxt3-demo/pull/68

ok, finally got it to run. test results:
node/preview/* route failed, the route is wrongly at /preview/* at the moment. after fixing this it works.
node/1/layout-preview seems to work fine

created fix at https://github.com/drunomics/nuxtjs-drupal-ce/pull/304 and testing this now.

Works now! Thus, merged the update to the naked-demo :-)

Automatically closed - issue fixed for 2 weeks with no activity.