feat(invoices)!: Obsah sections, internal-only notes, unified per-page PDF header+footer

Invoices now mirror the issued-orders document model:

- New invoice_sections table (CZ/EN rich-text "Obsah") edited via the
  shared SectionsEditor, printed inline right after the items on the
  PDF. Full-replace on update, same transaction as items.
- Printed notes dropped: the notes column is removed (migration merges
  existing content into internal_notes first); the form field is now
  "Interni poznamky", never printed. Legacy payloads sending notes are
  silently stripped.
- Form cleanup: Cislo faktury and Vystavil fields removed (number lives
  in the header, issued_by auto-fills); page header title restyled to
  the orders/offers pattern (number span + status chip).
- Unified per-page PDF header for the red-accent family: shared
  buildPdfHeaderTemplate in pdf-shared (22mm logo, red heading, red
  rule) rendered by a Puppeteer headerTemplate on EVERY page of both
  invoices and issued orders (incl. the /file fallback render); body
  headers are print-hidden. htmlToPdf gained the headerTemplate option.
- Footer parity: invoices get the per-page "Vystavil + Strana X z Y"
  footer; the invoice bottom block (notice + QR/VAT recap + Prevzal)
  is break-inside: avoid so a page break can never split it.
- @page margins now match the template space (32mm top, 18mm bottom) -
  Chromium lays out by CSS @page margins, which also fixes issued
  orders' content running into the 18mm footer zone on full pages.

BREAKING CHANGE: invoices.notes column dropped (data merged into
internal_notes); deploy must run prisma migrate deploy + generate.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

src/routes/admin/issued-orders-pdf.ts

@@ -11,6 +11,8 @@ import {
   escapeHtml,
   cleanQuillHtml,
   buildQuillIndentCss,
+  logoDataUriFromSettings,
+  buildPdfHeaderTemplate,
 } from "../../utils/pdf-shared";
 import createDOMPurify from "dompurify";
 import { JSDOM } from "jsdom";
@@ -226,13 +228,28 @@ export function buildIssuedOrderPdfFooter(
   const t = translations[lang];
   const pageWord = lang === "cs" ? "Strana" : "Page";
   const ofWord = lang === "cs" ? "z" : "of";
-  return `<div style="width:100%; font-size:8pt; font-family:Tahoma, sans-serif; color:#646464; padding:0 10mm; box-sizing:border-box; display:flex; align-items:center;">
+  return `<div style="width:100%; font-size:8pt; font-family:Tahoma, sans-serif; color:#646464; padding:0 12mm; box-sizing:border-box; display:flex; align-items:center;">
     <div style="flex:1; text-align:left;"><span style="font-weight:600;">${escapeHtml(t.issued_by)}</span> ${escapeHtml(issuerName)}</div>
     <div style="flex:1; text-align:center;">${pageWord} <span class="pageNumber"></span> ${ofWord} <span class="totalPages"></span></div>
     <div style="flex:1;"></div>
   </div>`;
 }
 
+/**
+ * Repeating per-page header for the issued-order PDF — the unified
+ * red-accent family header (shared with invoices): logo left, red
+ * "OBJEDNÁVKA č. X" right, red rule underneath, on EVERY page. The body's
+ * own header is print-hidden so page 1 doesn't show it twice.
+ */
+export function buildIssuedOrderPdfHeader(
+  lang: Lang,
+  logoDataUri: string,
+  poNumber: string,
+): string {
+  const t = translations[lang];
+  return buildPdfHeaderTemplate(logoDataUri, `${t.heading} ${poNumber}`);
+}
+
 export function renderIssuedOrderHtml(
   order: IssuedOrderPdfData,
   items: IssuedOrderPdfItem[],
@@ -249,17 +266,11 @@ export function renderIssuedOrderHtml(
   const currency = order.currency || "CZK";
   const poNumber = escapeHtml(order.po_number || "");
 
-  // Logo embedding (same logic as the confirmation template).
-  let logoImg = "";
-  if (settings?.logo_data) {
-    const buf = Buffer.from(settings.logo_data as Buffer);
-    let mime = "image/png";
-    if (buf[0] === 0xff && buf[1] === 0xd8) mime = "image/jpeg";
-    else if (buf[0] === 0x47 && buf[1] === 0x49) mime = "image/gif";
-    else if (buf[0] === 0x52 && buf[1] === 0x49) mime = "image/webp";
-    const b64 = buf.toString("base64");
-    logoImg = `<img src="data:${escapeHtml(mime)};base64,${b64}" class="logo" />`;
-  }
+  // Logo embedding — shared helper (also feeds the Puppeteer headerTemplate).
+  const logoDataUri = logoDataUriFromSettings(settings);
+  const logoImg = logoDataUri
+    ? `<img src="${logoDataUri}" class="logo" />`
+    : "";
 
   // PO direction: our company (settings) = Odběratel (buyer);
   // the sklad_suppliers record = Dodavatel (supplier).
@@ -350,7 +361,11 @@ export function renderIssuedOrderHtml(
 <style>
   @page {
     size: A4;
-    margin: 8mm 12mm 10mm 12mm;
+    /* Chromium uses THESE margins for layout (they override Puppeteer's
+       margin option) — they must match the header/footer template space:
+       32mm top (22mm logo + red heading + rule), 18mm bottom (Vystavil +
+       Strana X z Y). Same geometry as the invoice PDF. */
+    margin: 32mm 12mm 18mm 12mm;
   }
   * { margin: 0; padding: 0; box-sizing: border-box; }
   html, body {
@@ -621,6 +636,10 @@ ${indentCSS}
 
   @media print {
     body { -webkit-print-color-adjust: exact; print-color-adjust: exact; }
+    /* The logo + red heading print via Puppeteer's headerTemplate on EVERY
+       page — hide the body copy so page 1 doesn't show it twice. The screen
+       (HTML preview) keeps the body header. */
+    .invoice-header { display: none; }
   }
   @media screen {
     html { background: #525659; }
@@ -795,6 +814,11 @@ export default async function issuedOrdersPdfRoutes(fastify: FastifyInstance) {
             : new Date();
           nasOrdersManager.cleanIssued(order.po_number);
           const pdfBuffer = await htmlToPdf(html, {
+            headerTemplate: buildIssuedOrderPdfHeader(
+              lang,
+              logoDataUriFromSettings(settings),
+              order.po_number || "",
+            ),
             footerTemplate: buildIssuedOrderPdfFooter(lang, issuer.name),
           });
           nasOrdersManager.saveIssuedPdf(
@@ -807,6 +831,11 @@ export default async function issuedOrdersPdfRoutes(fastify: FastifyInstance) {
         }
 
         const pdf = await htmlToPdf(html, {
+          headerTemplate: buildIssuedOrderPdfHeader(
+            lang,
+            logoDataUriFromSettings(settings),
+            order.po_number || "",
+          ),
           footerTemplate: buildIssuedOrderPdfFooter(lang, issuer.name),
         });
         const filename = `Objednavka-${order.po_number || String(id)}.pdf`;