Alexander Schmidt 8bcdb33fa3 feat: UI polish, a11y, performance optimizations ...

- Payment summary card with prominent amount display
- "Bezahlt" stamp over dimmed QR code with TX details below
- Hide wallet/address buttons when paid, show only PDF
- URI box removed (was technical noise)
- Smart countdown: "29 Tage, 23 Std." instead of ticking seconds
- Dynamic page title for shared invoices
- Font fallbacks with size-adjust to prevent layout shifts
- Async Google Fonts loading, proper preconnect hints
- Deferred script loading (defer attribute)
- Minified JS (app.min.js, i18n.min.js)
- WCAG contrast fixes for badges and disabled button
- Footer link always underlined for a11y
- Translated aria-labels via data-i18n-aria
- i18n onChange callback for dynamic content updates
- Result card fade-in animation, responsive QR on mobile

2026-03-25 16:50:55 +01:00

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