LED-N/Fortnite-ChestCounter ? reverse-engineered prompt

Build me a small Windows app that keeps track of how many chests I open in Fortnite, match after match, by reading the replay files the game saves after each match.

I want it to be a simple tool with a clean overlay that can sit on top of the game, plus a report page that shows my total chests, my last match, my current session, and a full history over time. It should also track the treasure rewards that come from chest openings, and let me switch the app language between English, French, and Spanish.

Please make it work safely without touching the game files or reading Fortnite memory, just from the replay files on my PC. It should have a first run setup, remember my replay folder, and offer to open automatically with Fortnite. If possible, make the overlay blend into the game nicely and include shortcuts to show or hide it and lock or unlock it. If you need to check anything, look up current docs online.