expired

It will definitely fall into the category of "part of a larger collaboration ecosystem", but Gitlab checks all your boxes : it's open-source, installable on premise, allows groups, with their own discussions, handling uploads… And then, it can also host git repositories. 😅 They made an insane work on workflows so you can pretty much customize the tool how you want, including executing automated scripts when whatever event happens.

I think Vikunja can do all that.

There's focalboard (if you can get past the weird license): https://www.focalboard.com/

Or you can use Gitea: https://gitea.io/ It's mostly meant for collaboration on source code but it has a ticketing system with boards.

Have a look at https://vikunja.io/

Good luck, that does not exist.

Tools for project management are so specific that anyone who wants to use them needs to change their workflow or create their own tool.

If it was so simple as you told us you could make it in few days. We all know it is not.

So adapt to some specific one, or use google spreadsheets like the rest of us mortals.