Hmm, catalogues are more for data management / entry and less so for social sharing like galleries are. I believe this feature would be too niche to include within Composr as a core feature. Please let me know if you believe otherwise.
You could try your hands at making a simple non-bundled addon that does this. If you do, you can put your name on the addon as the author.
You could try your hands at making a simple non-bundled addon that does this. If you do, you can put your name on the addon as the author.