Nandan1234567/SGPA-CALCULATOR ? reverse-engineered prompt

Build me a VTU SGPA calculator web app where a student can upload their official result PDF and instantly see their SGPA, subject wise grade breakdown, credit summary, and CGPA trend. It should also let them enter marks manually if they do not have the PDF. The app needs to understand VTU 22 Scheme results for branches like CSE, ECE, ME, Civil, ISE, and EEE, handle credit variations correctly, and ignore things like absent or withheld entries.

I want it to feel clean and fast on mobile, with a simple landing page, a results page, and a CGPA tracker. No signup, no storing user PDFs or personal data, just process the file and return the calculation. If you need to check current docs or best practices for any part, look them up online. Make sure the whole thing is easy to run locally and ready for production with a frontend, backend API, PDF parsing service, and database for subject credit data.