chucapabra/dnd ? reverse-engineered prompt

Build me a small Windows desktop app called D&D Helper for a private group of friends. It should make the little game calculations easier, like quick number lookups, simple rolls, tracking basic stats, and other handy helper tools we might use during a session. Keep it lightweight and easy to use, with a clean interface that feels like a simple utility rather than a full game. It does not need to support real D&D rules, just the custom way our group plays.

I want it to be straightforward to open, click around, and get answers fast. Use a normal desktop layout with a few clear sections or tabs for the different helper tools. If anything about the rules or behavior is unclear, make sensible assumptions and keep it practical. Look up current docs online if you need to.