feat: PDF invoice, payment summary, UI polish

- PDF invoice generation with jsPDF (lazy-loaded, includes paid status)
- Payment summary card: amount, fiat equivalent, description prominently displayed
- URI box hidden behind collapsible "Show Monero URI" details
- Smart countdown: "29 Tage, 23 Std." instead of ticking seconds
- Dynamic page title: "0.017 XMR — Rechnung #42 | xmrpay.link"
- Result card fade-in animation
- Responsive QR code on mobile
- Rename .btn-monitor to .btn-proof
- "In Wallet öffnen" unified as <button>

app.js

@@ -47,7 +47,10 @@
   const verifyProofBtn = $('#verifyProof');
   const proofResult = $('#proofResult');
   const paymentStatus = $('#paymentStatus');
+  const paymentSummary = $('#paymentSummary');
+  const downloadPdfBtn = $('#downloadPdf');
   let cryptoLoaded = false;
+  let pdfLoaded = false;
 
   // --- Init ---
   fetchRates();
@@ -86,6 +89,9 @@
     selectedDays = parseInt(timerCustom.value) || 0;
   });
 
+  // PDF
+  downloadPdfBtn.addEventListener('click', generatePdf);
+
   // TX Proof events
   proofToggle.addEventListener('click', toggleProofPanel);
   txHashInput.addEventListener('input', validateProofInputs);
@@ -121,6 +127,8 @@
     proofResult.className = 'proof-result';
     paymentStatus.innerHTML = '';
     paymentStatus.className = 'payment-status';
+    paymentSummary.innerHTML = '';
+    document.title = 'xmrpay.link \u2014 Monero Invoice Generator';
     history.replaceState(null, '', location.pathname);
     window.scrollTo({ top: 0, behavior: 'smooth' });
     addrInput.focus();
@@ -243,7 +251,11 @@
     // Show result
     resultSection.classList.add('visible');
     uriBox.textContent = uri;
-    openWalletBtn.href = uri;
+    openWalletBtn.onclick = function () { window.location.href = uri; };
+
+    // Payment summary + page title
+    buildSummary(xmrAmount, desc, timer);
+    updatePageTitle(xmrAmount, desc);
 
     // Share link — show long URL immediately, then replace with short
     const hash = buildHash(addr, xmrAmount, desc, timer);
@@ -321,6 +333,31 @@
     return true;
   }
 
+  function buildSummary(xmrAmount, desc, days) {
+    var html = '';
+    if (xmrAmount) {
+      html += '<div class="summary-amount">' + xmrAmount.toFixed(8) + ' XMR</div>';
+      var amount = parseFloat(amountInput.value);
+      var currency = currencySelect.value;
+      if (currency !== 'XMR' && amount) {
+        html += '<div class="summary-fiat">\u2248 ' + amount.toFixed(2) + ' ' + currency + '</div>';
+      }
+    }
+    if (desc) {
+      html += '<div class="summary-desc">' + desc.replace(/</g, '&lt;') + '</div>';
+    }
+    paymentSummary.innerHTML = html;
+  }
+
+  function updatePageTitle(xmrAmount, desc) {
+    var parts = [];
+    if (xmrAmount) parts.push(xmrAmount.toFixed(4) + ' XMR');
+    if (desc) parts.push(desc);
+    if (parts.length) {
+      document.title = parts.join(' — ') + ' | xmrpay.link';
+    }
+  }
+
   function startCountdown() {
     if (countdownInterval) clearInterval(countdownInterval);
     countdownEl.textContent = '';
@@ -342,18 +379,17 @@
       const d = Math.floor(remaining / 86400000);
       const h = Math.floor((remaining % 86400000) / 3600000);
       const m = Math.floor((remaining % 3600000) / 60000);
-      const s = Math.floor((remaining % 60000) / 1000);
       if (d > 0) {
         countdownEl.textContent = I18n.t('countdown_remaining_days')
-          .replace('{d}', d).replace('{h}', pad(h)).replace('{m}', pad(m)).replace('{s}', pad(s));
+          .replace('{d}', d).replace('{h}', h);
       } else {
         countdownEl.textContent = I18n.t('countdown_remaining_hours')
-          .replace('{h}', pad(h)).replace('{m}', pad(m)).replace('{s}', pad(s));
+          .replace('{h}', pad(h)).replace('{m}', pad(m));
       }
     }
 
     tick();
-    countdownInterval = setInterval(tick, 1000);
+    countdownInterval = setInterval(tick, 60000); // Update every minute, not every second
   }
 
   function pad(n) {
@@ -421,6 +457,186 @@
     }
   }
 
+  // --- PDF Invoice ---
+
+  function loadJsPdf() {
+    return new Promise(function (resolve, reject) {
+      if (window.jspdf) { resolve(); return; }
+      var script = document.createElement('script');
+      script.src = 'lib/jspdf.min.js';
+      script.onload = function () { pdfLoaded = true; resolve(); };
+      script.onerror = function () { reject(new Error('Failed to load jsPDF')); };
+      document.head.appendChild(script);
+    });
+  }
+
+  async function generatePdf() {
+    await loadJsPdf();
+    var jsPDF = window.jspdf.jsPDF;
+    var doc = new jsPDF({ orientation: 'portrait', unit: 'mm', format: 'a4' });
+
+    var addr = addrInput.value.trim();
+    var xmrAmount = getXmrAmount();
+    var desc = descInput.value.trim();
+    var amount = parseFloat(amountInput.value);
+    var currency = currencySelect.value;
+    var pageW = doc.internal.pageSize.getWidth();
+    var margin = 20;
+    var contentW = pageW - margin * 2;
+    var y = margin;
+
+    // --- Header: Orange accent bar ---
+    doc.setFillColor(242, 104, 33);
+    doc.rect(0, 0, pageW, 8, 'F');
+
+    // --- Title ---
+    y = 22;
+    doc.setFont('helvetica', 'bold');
+    doc.setFontSize(22);
+    doc.setTextColor(242, 104, 33);
+    doc.text(I18n.t('pdf_title'), margin, y);
+
+    // --- Date (top right) ---
+    doc.setFont('helvetica', 'normal');
+    doc.setFontSize(10);
+    doc.setTextColor(120, 120, 120);
+    var dateStr = new Date().toLocaleDateString(I18n.getLang() === 'de' ? 'de-CH' : 'en-US', {
+      year: 'numeric', month: 'long', day: 'numeric'
+    });
+    doc.text(I18n.t('pdf_date') + ': ' + dateStr, pageW - margin, y, { align: 'right' });
+
+    // --- Divider ---
+    y += 6;
+    doc.setDrawColor(220, 220, 220);
+    doc.setLineWidth(0.3);
+    doc.line(margin, y, pageW - margin, y);
+
+    // --- QR Code (right side) ---
+    var qrCanvas = qrContainer.querySelector('canvas');
+    var qrSize = 50;
+    var qrX = pageW - margin - qrSize;
+    var qrY = y + 6;
+    if (qrCanvas) {
+      var qrData = qrCanvas.toDataURL('image/png');
+      doc.addImage(qrData, 'PNG', qrX, qrY, qrSize, qrSize);
+      // QR hint
+      doc.setFontSize(7);
+      doc.setTextColor(150, 150, 150);
+      doc.text(I18n.t('pdf_scan_qr'), qrX + qrSize / 2, qrY + qrSize + 4, { align: 'center' });
+    }
+
+    // --- Invoice details (left side, next to QR) ---
+    var detailX = margin;
+    var detailW = qrX - margin - 10;
+    y += 14;
+
+    function addField(label, value) {
+      doc.setFont('helvetica', 'normal');
+      doc.setFontSize(9);
+      doc.setTextColor(150, 150, 150);
+      doc.text(label, detailX, y);
+      y += 5;
+      doc.setFont('helvetica', 'bold');
+      doc.setFontSize(11);
+      doc.setTextColor(40, 40, 40);
+      var lines = doc.splitTextToSize(value, detailW);
+      doc.text(lines, detailX, y);
+      y += lines.length * 5 + 4;
+    }
+
+    // Amount
+    if (xmrAmount) {
+      var amountStr = xmrAmount.toFixed(8) + ' XMR';
+      if (currency !== 'XMR' && amount) {
+        amountStr += '  (\u2248 ' + amount.toFixed(2) + ' ' + currency + ')';
+      }
+      addField(I18n.t('pdf_amount'), amountStr);
+    }
+
+    // Description
+    if (desc) {
+      addField(I18n.t('pdf_desc'), desc);
+    }
+
+    // Deadline
+    if (selectedDays > 0) {
+      var deadlineDate = new Date(Date.now() + selectedDays * 86400000);
+      var deadlineStr = deadlineDate.toLocaleDateString(I18n.getLang() === 'de' ? 'de-CH' : 'en-US', {
+        year: 'numeric', month: 'long', day: 'numeric'
+      });
+      addField(I18n.t('pdf_deadline'), deadlineStr + ' (' + I18n.t('pdf_deadline_days').replace('{d}', selectedDays) + ')');
+    }
+
+    // Address (below QR if needed, full width)
+    y = Math.max(y, qrY + qrSize + 12);
+    doc.setFont('helvetica', 'normal');
+    doc.setFontSize(9);
+    doc.setTextColor(150, 150, 150);
+    doc.text(I18n.t('pdf_address'), margin, y);
+    y += 5;
+
+    // Address in monospace box
+    doc.setFillColor(245, 245, 245);
+    doc.roundedRect(margin, y - 3.5, contentW, 10, 2, 2, 'F');
+    doc.setFont('courier', 'normal');
+    doc.setFontSize(8);
+    doc.setTextColor(60, 60, 60);
+    doc.text(addr, margin + 3, y + 2.5);
+    y += 14;
+
+    // monero: URI
+    var uri = uriBox.textContent;
+    if (uri) {
+      doc.setFillColor(245, 245, 245);
+      doc.roundedRect(margin, y - 3.5, contentW, 10, 2, 2, 'F');
+      doc.setFont('courier', 'normal');
+      doc.setFontSize(6.5);
+      doc.setTextColor(100, 100, 100);
+      var uriLines = doc.splitTextToSize(uri, contentW - 6);
+      doc.text(uriLines, margin + 3, y + 2);
+      y += uriLines.length * 3 + 10;
+    }
+
+    // --- Payment Status ---
+    if (paymentStatus.classList.contains('paid')) {
+      y += 4;
+      doc.setFillColor(76, 175, 80);
+      doc.roundedRect(margin, y - 4, contentW, 16, 2, 2, 'F');
+      doc.setFont('helvetica', 'bold');
+      doc.setFontSize(12);
+      doc.setTextColor(255, 255, 255);
+      doc.text(I18n.t('status_paid').toUpperCase(), margin + contentW / 2, y + 2, { align: 'center' });
+      // Extract details from the paid-detail div
+      var paidDetail = paymentStatus.querySelector('.paid-detail');
+      if (paidDetail) {
+        doc.setFont('helvetica', 'normal');
+        doc.setFontSize(8);
+        doc.text(paidDetail.textContent, margin + contentW / 2, y + 8, { align: 'center' });
+      }
+      y += 22;
+    }
+
+    // --- Footer ---
+    doc.setDrawColor(220, 220, 220);
+    doc.setLineWidth(0.3);
+    var footerY = doc.internal.pageSize.getHeight() - 15;
+    doc.line(margin, footerY, pageW - margin, footerY);
+    doc.setFont('helvetica', 'normal');
+    doc.setFontSize(7);
+    doc.setTextColor(180, 180, 180);
+    doc.text(I18n.t('pdf_footer'), pageW / 2, footerY + 5, { align: 'center' });
+
+    // Share link
+    var shareLink = shareLinkInput.value;
+    if (shareLink) {
+      doc.text(shareLink, pageW / 2, footerY + 9, { align: 'center' });
+    }
+
+    // Save
+    var filename = 'xmrpay-' + (desc ? desc.replace(/[^a-zA-Z0-9]/g, '-').substring(0, 30) : 'invoice') + '.pdf';
+    doc.save(filename);
+  }
+
   // --- TX Proof Functions ---
 
   function toggleProofPanel() {
@@ -576,9 +792,19 @@
 
   function showPaidStatus(data) {
     paymentStatus.className = 'payment-status paid';
+    var dateStr = '';
+    if (data.verified_at) {
+      var d = new Date(data.verified_at * 1000);
+      dateStr = ' — ' + d.toLocaleDateString(I18n.getLang() === 'de' ? 'de-CH' : 'en-US', {
+        year: 'numeric', month: 'long', day: 'numeric'
+      });
+    }
     paymentStatus.innerHTML = '<div class="paid-badge">' + I18n.t('status_paid') +
       '</div><div class="paid-detail">' + data.amount.toFixed(6) + ' XMR — TX ' +
-      data.tx_hash.substring(0, 8) + '...</div>';
+      data.tx_hash.substring(0, 8) + '...' + dateStr + '</div>';
+    // Hide proof section when paid
+    var proofSection = document.getElementById('proofSection');
+    if (proofSection) proofSection.style.display = 'none';
     setPaidFavicon();
   }
 

i18n.js

@@ -20,14 +20,25 @@ var I18n = (function () {
       btn_generate: 'Zahlungsanforderung erstellen',
       btn_open_wallet: 'In Wallet öffnen',
       btn_copy_addr: 'Adresse kopieren',
+      btn_download_pdf: 'PDF Rechnung',
+      pdf_title: 'Zahlungsanforderung',
+      pdf_address: 'XMR-Adresse',
+      pdf_amount: 'Betrag',
+      pdf_desc: 'Beschreibung',
+      pdf_deadline: 'Zahlungsfrist',
+      pdf_deadline_days: '{d} Tage',
+      pdf_date: 'Datum',
+      pdf_scan_qr: 'QR-Code scannen zum Bezahlen',
+      pdf_footer: 'Erstellt mit xmrpay.link — Keine Registrierung, kein KYC',
       qr_hint: 'Klick auf QR zum Speichern',
       footer: 'Open Source &middot; Kein Backend &middot; Kein KYC &middot; <a href="https://gitea.schmidt.eco/schmidt1024/xmrpay.link" target="_blank">Source</a>',
+      label_uri_details: 'Monero-URI anzeigen',
       label_share_link: 'Teilbarer Link',
       btn_new_request: 'Neue Zahlungsanforderung',
       toast_copied: 'Kopiert!',
       countdown_expired: 'Zahlungsfrist abgelaufen',
-      countdown_remaining_days: 'Zahlungsfrist: {d} Tage, {h}:{m}:{s}',
+      countdown_remaining_days: 'Zahlungsfrist: {d} Tage, {h} Std.',
-      countdown_remaining_hours: 'Zahlungsfrist: {h}:{m}:{s}',
+      countdown_remaining_hours: 'Zahlungsfrist: {h}:{m} Std.',
       rates_offline: 'Kurse nicht verfügbar — nur XMR-Betrag möglich',
       btn_prove_payment: 'Zahlung nachweisen',
       label_tx_hash: 'Transaction ID (TX Hash)',
@@ -55,14 +66,25 @@ var I18n = (function () {
       btn_generate: 'Create payment request',
       btn_open_wallet: 'Open in wallet',
       btn_copy_addr: 'Copy address',
+      btn_download_pdf: 'PDF Invoice',
+      pdf_title: 'Payment Request',
+      pdf_address: 'XMR Address',
+      pdf_amount: 'Amount',
+      pdf_desc: 'Description',
+      pdf_deadline: 'Payment deadline',
+      pdf_deadline_days: '{d} days',
+      pdf_date: 'Date',
+      pdf_scan_qr: 'Scan QR code to pay',
+      pdf_footer: 'Created with xmrpay.link — No registration, no KYC',
       qr_hint: 'Click QR to save',
       footer: 'Open Source &middot; No Backend &middot; No KYC &middot; <a href="https://gitea.schmidt.eco/schmidt1024/xmrpay.link" target="_blank">Source</a>',
+      label_uri_details: 'Show Monero URI',
       label_share_link: 'Shareable link',
       btn_new_request: 'New payment request',
       toast_copied: 'Copied!',
       countdown_expired: 'Payment deadline expired',
-      countdown_remaining_days: 'Deadline: {d} days, {h}:{m}:{s}',
+      countdown_remaining_days: 'Deadline: {d} days, {h} hrs',
-      countdown_remaining_hours: 'Deadline: {h}:{m}:{s}',
+      countdown_remaining_hours: 'Deadline: {h}:{m} hrs',
       rates_offline: 'Rates unavailable — XMR amount only',
       btn_prove_payment: 'Prove payment',
       label_tx_hash: 'Transaction ID (TX Hash)',

index.html

@@ -58,8 +58,12 @@
 
     <div id="result" class="card">
       <div class="qr-container" id="qr"></div>
+      <div class="payment-summary" id="paymentSummary"></div>
       <div class="countdown" id="countdown"></div>
-      <div class="uri-box" id="uri"></div>
+      <details class="uri-details">
+        <summary data-i18n="label_uri_details"></summary>
+        <div class="uri-box" id="uri"></div>
+      </details>
       <div class="share-link-box" id="shareLinkBox">
         <label data-i18n="label_share_link"></label>
         <div class="share-link-row">
@@ -70,12 +74,13 @@
         </div>
       </div>
       <div class="actions">
-        <a class="btn btn-secondary" id="openWallet" href="#" data-i18n="btn_open_wallet"></a>
+        <button class="btn btn-secondary" id="openWallet" data-i18n="btn_open_wallet"></button>
         <button class="btn btn-secondary" id="copyAddr" data-i18n="btn_copy_addr"></button>
+        <button class="btn btn-secondary" id="downloadPdf" data-i18n="btn_download_pdf"></button>
       </div>
       <!-- TX Proof Verification -->
       <div class="proof-section" id="proofSection">
-        <button class="btn btn-monitor" id="proofToggle">
+        <button class="btn btn-proof" id="proofToggle">
           <svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
             <path d="M22 11.08V12a10 10 0 1 1-5.93-9.14"/>
             <polyline points="22 4 12 14.01 9 11.01"/>

style.css

@@ -325,6 +325,12 @@ textarea {
 
 #result.visible {
   display: block;
+  animation: fadeSlideIn 0.3s ease;
+}
+
+@keyframes fadeSlideIn {
+  from { opacity: 0; transform: translateY(10px); }
+  to { opacity: 1; transform: translateY(0); }
 }
 
 .qr-container {
@@ -355,6 +361,48 @@ textarea {
   margin-top: 0.3rem;
 }
 
+.payment-summary {
+  text-align: center;
+  padding: 0.5rem 0 0.8rem;
+}
+
+.summary-amount {
+  font-size: 1.6rem;
+  font-weight: 700;
+  color: var(--text);
+  font-family: var(--mono);
+}
+
+.summary-fiat {
+  font-size: 0.85rem;
+  color: var(--text-muted);
+  margin-top: 0.1rem;
+}
+
+.summary-desc {
+  font-size: 0.9rem;
+  color: var(--text-muted);
+  margin-top: 0.4rem;
+  font-style: italic;
+}
+
+.uri-details {
+  margin-bottom: 0.8rem;
+}
+
+.uri-details summary {
+  font-size: 0.75rem;
+  color: var(--text-muted);
+  cursor: pointer;
+  text-transform: uppercase;
+  letter-spacing: 0.5px;
+  padding: 0.3rem 0;
+}
+
+.uri-details summary:hover {
+  color: var(--text);
+}
+
 .uri-box {
   background: var(--bg-input);
   border: 1px solid var(--border);
@@ -364,7 +412,7 @@ textarea {
   font-size: 0.75rem;
   word-break: break-all;
   color: var(--text-muted);
-  margin-bottom: 0.8rem;
+  margin-top: 0.4rem;
   max-height: 80px;
   overflow-y: auto;
 }
@@ -401,10 +449,16 @@ textarea {
 .actions {
   display: flex;
   gap: 0.5rem;
+  flex-wrap: wrap;
 }
 
 .actions .btn-secondary {
-  flex: 1;
+  flex: 1 1 30%;
+  min-width: 0;
+  font-size: 0.8rem;
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
 }
 
 /* --- TX Proof Section --- */
@@ -415,7 +469,7 @@ textarea {
   padding-top: 0.8rem;
 }
 
-.btn-monitor {
+.btn-proof {
   width: 100%;
   display: flex;
   align-items: center;
@@ -433,7 +487,7 @@ textarea {
   font-family: var(--font);
 }
 
-.btn-monitor:hover {
+.btn-proof:hover {
   border-color: var(--accent);
   color: var(--text);
 }
@@ -572,4 +626,12 @@ footer a:hover {
   header h1 {
     font-size: 1.5rem;
   }
+  .qr-container canvas,
+  .qr-container img {
+    max-width: 80vw;
+    height: auto;
+  }
+  .summary-amount {
+    font-size: 1.3rem;
+  }
 }