Upload qr-payment.js

Restore to commit 60740df: Fix phụ phí

Delete old qr-payment.js

v1039: Click handler ALWAYS works, ExcelJS check, direct fallback

v1038.1783485655: Fixed click handler

v1038.1: Fix click handler - Excel/PDF buttons work without override

FORCE v1038: skip fees <1000đ, fix đ/vnd units

Force v1038 update: skip fees <1000đ, fix đ/vnd units

v1038 + ts: 1783484016

Fix v1038: skip tiny fees (<1000), proper đ/vnd handling, fees in exports