- Self-host Inter and JetBrains Mono (woff2, 69KB total)
- Remove Google Fonts dependency entirely (no external requests)
- Service Worker pre-caches font files
- Eliminate font-swap layout shifts
- WCAG contrast fix: disabled button uses solid color instead of opacity
- Footer link always underlined for distinguishability
- Translated aria-labels via data-i18n-aria
- Dimmed QR with "Bezahlt" stamp on paid invoices
- Hide wallet/address buttons when invoice is paid
Remove v2 view-key payment monitor (privacy concern — nobody should
enter their private view key on a website). Replace with TX proof
verification where the sender provides TX Hash + TX Key from their
wallet. The proof is cryptographically verified client-side and
stored with the invoice for persistent "Paid" status.
- Remove monitor.js and all view-key monitoring UI/logic
- Add TX proof section: sender enters TX Hash + TX Key
- Client-side verification via check_tx_key equivalent (noble-curves)
- api/verify.php stores/retrieves payment proofs per invoice
- Short URL redirect now includes invoice code for status lookup
- Invoice link shows "Paid" badge once proof is verified
- Deadline badges (7/14/30 days) for payment terms
- XMR address validation (standard, subaddress, integrated)
- Amount in XMR/EUR/USD/CHF with CoinGecko conversion
- QR code generation with monero: URI
- Shareable short URLs (/s/abc123) via self-hosted PHP backend
- i18n (DE/EN) with browser language detection
- Service worker for offline capability
- Dark mode, responsive design
