Redesigned Payment History with card layout, Paid/Due status chips, and clearer amount/date details.
Added filters and search (Paid/Due/All, month/year chips, invoice code search).
Paid invoices now show accurate paid time and sort by latest payment.
Menu polish: distinct icon for Payment History and renamed โPayment Info (Manual)โ.
Stability fixes: lock timer/notification handling, foreground service reliability, 3cx link open safety, and launcher/fragment crash fixes.