Anchor PDF payment card to footer and size QR to text height

Move the payment info card (account number, IBAN, SWIFT) to the
bottom of the invoice page so it sits flush with the footer, and
size the QR code to match the combined height of the three payment
lines instead of a fixed size.

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>

app/src/app.js

@@ -572,16 +572,22 @@ const renderInvoicePdf = async (document, invoice) => {
     document.y += 35;
     document.moveTo(document.page.margins.left, document.y).lineTo(document.page.margins.left + pageWidth, document.y)
         .strokeColor(navy).lineWidth(1.5).stroke();
-    document.y += 12;
+    const paymentCardHeight = 105;
-    const paymentTop = document.y;
+    const paymentTop = document.page.height - document.page.margins.bottom - paymentCardHeight;
-    document.roundedRect(document.page.margins.left, paymentTop, pageWidth, 165, 4).fillAndStroke('#f4f7fb', line);
+    const paymentLineHeight = 18;
+    const qrSize = paymentLineHeight * 3;
+    document.roundedRect(document.page.margins.left, paymentTop, pageWidth, paymentCardHeight, 4)
+        .fillAndStroke('#f4f7fb', line);
     document.fillColor(navy).font(boldFont).fontSize(11).text('Platební údaje', document.page.margins.left + 10, paymentTop + 10);
     document.fillColor(bodyText).font(regularFont).fontSize(10)
         .text(`Číslo účtu: ${pdfText(payment.cisloUctu)}`, document.page.margins.left + 10, paymentTop + 35)
-        .text(`IBAN: ${pdfText(payment.iban)}`, document.page.margins.left + 10, paymentTop + 55)
+        .text(`IBAN: ${pdfText(payment.iban)}`, document.page.margins.left + 10, paymentTop + 35 + paymentLineHeight)
-        .text(`SWIFT: ${pdfText(payment.swift)}`, document.page.margins.left + 10, paymentTop + 75);
+        .text(`SWIFT: ${pdfText(payment.swift)}`, document.page.margins.left + 10, paymentTop + 35 + paymentLineHeight * 2);
     if (qrBuffer) {
-        document.image(qrBuffer, document.page.margins.left + pageWidth - 155, paymentTop + 10, { width: 145, height: 145 });
+        document.image(qrBuffer, document.page.margins.left + pageWidth - qrSize - 10, paymentTop + 30, {
+            width: qrSize,
+            height: qrSize
+        });
     }
     document.end();
 };