Kaui 4.0.1 - we shouldn't make calls to the engines.json page on the signed-out page

We shouldn't make calls to the engines.json page on the signed-out page:

<img width="554" height="720" alt="Image" src="https://github.com/user-attachments/assets/53f59272-303b-42d6-bb65-9c44c48bf968" />



This issue is low priority. Related slack thread: https://killbillio.slack.com/archives/C05815KTA8L/p1763403603468699