Forever Payment — Premium Fintech Dashboard (Frontend Demo) v2

Updated:
- Stronger mobile responsiveness (small phones + high DPI)
- Tables convert to card layout on small screens
- Login/Signup are standalone with minimal header (theme toggle)
- Documents page only has API Docs
- Add Money = amount only + generate payment link (demo)
- New page: Package Buy (one package) with live expiry countdown

Run:
- Open login.html in browser.
