fleasion/Fleasion ? reverse-engineered prompt

Build me a desktop app that can intercept Roblox game asset requests and swap them in real time on Windows, macOS, and Linux.

I want it to run locally in the background, route Roblox traffic through a proxy, and let me replace, remove, or redirect assets like textures, sounds, meshes, and animations before Roblox receives them. It should also cache downloaded assets so I can preview and export them, and include an easy way to clear Roblox’s cache when I change replacements.

Please make it feel like a real app with a simple dashboard, system tray controls, live logs, settings for light, dark, or system theme, and an option to run on boot. It should handle the different platform setup details automatically, including certificates and whatever is needed for Roblox to trust the local proxy. If you need to look up current docs or platform behavior online, go ahead.