fieryhenry/BCSFE-Python — reverse-engineered prompt

Build me a Python command line save editor for The Battle Cats, similar to BCSFE. I want a beginner friendly tool that someone can install and run from a terminal, then pick or type the path to their SAVE_DATA file, make a backup automatically, edit common save values like XP and Cat Food, and save the patched file back safely.

Please make the flow really clear for people who are not comfortable with terminals. It should explain what to do, warn before overwriting anything, handle bad file paths or broken saves nicely, and work on Windows, macOS, Linux, and Android terminals where possible. If a file picker is available, use it, but also allow typing the path manually.

Include a simple menu based interface, support for updating text through localization files, and a basic theme system if that fits. Add tests for loading, editing, backing up, and saving. Also include clear install, update, uninstall, and usage instructions in the README.