Thanks for the tip. I see myself doing that for my own devices, but public libraries have strict restrictions on their systems, so local stuff is no go, I need a browser frontend.

I've concluded that top recommendations for a "lighter" project management software (with document support) would be something like Plane, AppFlowy, Huly, or Leantime. If neither of those satisfy me, I'll fall back to spreadsheet + Silverbullet.