This update fixes an issue where the AI user preferences tab was not appearing unless `SiteSetting.ai_helper_enabled` was `true`. This is because we previously checked for it's presence when user preferences only had a single setting related to Helper. However, since then, we've also added search discoveries setting there too. As such, we don't want it to depend on Helper. We also sneak in this update a modernization of converting the preferences template from `.hbs` to `.gjs`.
This update adds the ability to disable search discoveries. This can be done through a tooltip when search discoveries are shown. It can also be done in the AI user preferences, which has also been updated to accommodate more than just the one image caption setting.