Would you good people know about any efforts in this direction that are not so "top-down?" Seems to me that there a few "addons" to the classic terminal that co

Would you good people know about any efforts in this direction that are not so "top-down?" Seems to me that there a few "addons" to the classic terminal that could go a hugely long way. Offhand, image-et-al preview still feels like a mess, a million ways of doing it and none are that good. Also, I dream about something like "fzf, but with a very clearly delineated out-of-the-current-shell window,perhaps like rofi" or something?