akirabyte As several other feature requests, add support for likes would require Files Gallery to implement CMS-like features. What I mean by that, is that we need to start storing various data for each folder and file, for example in some _files.json data file inside each folder. Currently, Files Gallery simply passive reads all files and folders without storing anything.
So yes, perhaps when I move towards CMS-like features.
akirabyte Option to Like ❤️ (or Bookmark) pictures/files.
"Bookmark" might be considered something different. I already have some plans about adding a "favorites" ⭐ option, where selected files and folders are added to a "favorites" folder in the left menu. This does not necessarily require storage on disk, as it could be stored on a per-browser localStorage basis.