fix(pdf): Überweisungs-QR-Code überdeckt keine Positionen und Summen mehr

Reichen Positionen oder Summen auf der letzten Seite in den Bereich des QR-Codes, wird er auf einer eigenen Folgeseite gedruckt. Die MCP-Vorschau meldet das und schlägt einen früheren Seitenumbruch vor.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

backend/tests/mcpOutgoingDocumentPreview.test.ts

@@ -77,7 +77,9 @@ test("rendered preview records rows per page and rasterizes pages", { skip: !has
     const data = buildOutgoingDocumentPdfData(document(rows), context)
     const layout: InvoicePdfLayout = { pageHeightMm: 0, rows: [], pageCount: 0 }
     const pdf: any = await createInvoicePDF({} as any, "base64", data, "letterhead.pdf", layout)
-    assert.equal(layout.pageCount, 2)
+    // Rows overflow page 2, so the payment QR code gets an extra third page.
+    assert.equal(layout.pageCount, 3)
+    assert.equal(layout.paymentQr!.page, 3)
     assert.equal(layout.rows.find((row) => row.index === 13)!.page, 2)
     assert.ok(layout.endText && layout.totals)
     const analysis = analyzeOutgoingDocumentLayout(layout)
@@ -94,3 +96,30 @@ test("rendered preview records rows per page and rasterizes pages", { skip: !has
 test("preview tool is read-only for outgoing documents", () => {
     assert.deepEqual(mcpToolMap.get("accounting.outgoing_documents.preview")!.requiredPermissions, ["accounting.outgoing_documents.read"])
 })
+
+test("payment QR code moves to its own page instead of covering amounts", { skip: !hasPdftoppm && "pdftoppm fehlt" }, async (t) => {
+    const letterhead = await PDFDocument.create()
+    letterhead.addPage([595.28, 841.89]).drawText("Briefpapier", { x: 40, y: 40, size: 8 })
+    const background = Buffer.from(await letterhead.save())
+    await initS3()
+    t.mock.method(s3, "send", async () => ({ Body: Readable.from([background]) }))
+    const render = async (count: number) => {
+        const layout: InvoicePdfLayout = { pageHeightMm: 0, rows: [], pageCount: 0 }
+        await createInvoicePDF({} as any, "base64", buildOutgoingDocumentPdfData(document(positions(count)), context), "letterhead.pdf", layout)
+        return layout
+    }
+
+    const short = await render(3)
+    assert.equal(short.pageCount, 1)
+    assert.equal(short.paymentQr!.page, 1)
+    assert.ok(short.totals!.bottomMm < short.paymentQr!.topMm)
+
+    const long = await render(6)
+    assert.equal(long.pageCount, 2)
+    assert.equal(long.paymentQr!.page, 2)
+    assert.ok(long.rows.every((row) => row.page === 1))
+    const analysis = analyzeOutgoingDocumentLayout(long)
+    const warning = analysis.warnings.find((item) => item.type === "paymentQrOwnPage")
+    assert.ok(warning, JSON.stringify(analysis.warnings))
+    assert.ok(!analysis.warnings.some((item) => item.type === "emptyPage"))
+})