Enhance MyLedger: Audit, Security and New Features

I've built MyLedger, a working offline-first personal + small-business accounting app for Indian users. It runs entirely on the user's machine — no cloud, no login, no tracking — and auto-writes a live 12-sheet Excel workbook as the portable database... (Budget: ₹600 - ₹1500 INR, Jobs: API Development, Documentation, Excel, Flask, JavaScript, Python, Software Development, Software Testing, Web Security)