feat(expense-export): parent-company react-pdf + pdfkit brand header

Phase 1 / commit 10 of 14 — migrates the pdfme-based parent-company
expense export to react-pdf and adds a shared brand header to the
pdfkit-based streaming expense PDF so both surfaces match the rest of
the internal-only PDF family.

parent-company-expense.tsx:
  Summary KV grid (entry count, subtotal, fee, total) + entries table
  with right-aligned EUR amounts and a totals row. Footnote rendered
  when the EUR rate lookup falls through to the 1:1 USD:EUR fallback.

expense-export.tsx (renamed .ts -> .tsx):
  - exportParentCompany now renders the react-pdf template via
    resolvePortLogo() + renderPdf()
  - dropped the inline pdfme template object (was the last pdfme caller
    in this file)
  - return type widened from Uint8Array to Buffer; caller already wraps
    in Buffer.from() so no API change downstream

expense-pdf.service.ts (the pdfkit streaming engine — unchanged):
  - addHeader() now draws a dark slate band matching the brand-kit
    header band, with the port logo letterboxed on the left and the
    document title right-aligned. Falls back to text port-name if the
    logo image is missing or can't be decoded by pdfkit
  - port + logo resolved once per export via Promise.all
  - subheader stays beneath the band in muted grey, same as before
  - streaming behavior + receipt embedding + sharp compression
    untouched — the only change is the visual treatment of the header

Old pdfme inline template deleted along with the generatePdf import.
After this commit, the only remaining pdfme imports are in:
  invoice-template.ts, tiptap-to-pdfme.ts, eoi-standard-inapp.ts, and
  document-templates.ts (lines 516-522). All four are removed in
  commits 11-12.

1319/1319 vitest green.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/lib/services/expense-pdf.service.ts

@@ -41,7 +41,9 @@ import sharp from 'sharp';
 import { db } from '@/lib/db';
 import { expenses } from '@/lib/db/schema/financial';
 import { files } from '@/lib/db/schema/documents';
+import { ports } from '@/lib/db/schema/ports';
 import { getRate } from '@/lib/services/currency';
+import { resolvePortLogo } from '@/lib/pdf/brand-kit/logo';
 import { formatCurrency } from '@/lib/utils/currency';
 import { getStorageBackend } from '@/lib/storage';
 import { logger } from '@/lib/logger';
@@ -487,6 +489,12 @@ export async function streamExpensePdf(
   const processed = await processExpenses(rawRows, opts.targetCurrency);
   const totals = computeTotals(processed, opts.targetCurrency, opts.includeProcessingFee);
 
+  // Brand assets for the header band — shared with the react-pdf surfaces.
+  const [port, logo] = await Promise.all([
+    db.query.ports.findFirst({ where: eq(ports.id, args.portId) }),
+    resolvePortLogo(args.portId),
+  ]);
+
   // Bulk-resolve receipt file metadata (one DB round-trip vs N).
   const allFileIds = processed
     .flatMap((r) => r.receiptFileIds ?? [])
@@ -513,7 +521,7 @@ export async function streamExpensePdf(
   // / doc.emit('error') and surface to the consumer of the stream.
   void (async () => {
     try {
-      addHeader(doc, opts);
+      addHeader(doc, { ...opts, portName: port?.name, logoBuffer: logo.buffer });
       if (opts.includeSummary) addSummaryBox(doc, totals, opts);
       if (opts.includeDetails) addExpenseTable(doc, processed, opts);
 
@@ -544,15 +552,64 @@ export async function streamExpensePdf(
 
 // ─── Page sections ──────────────────────────────────────────────────────────
 
-function addHeader(doc: PDFKit.PDFDocument, opts: { documentName: string; subheader?: string }) {
+function addHeader(
+  doc: PDFKit.PDFDocument,
+  opts: {
+    documentName: string;
+    subheader?: string;
+    portName?: string;
+    logoBuffer?: Buffer | null;
+  },
+) {
+  // Brand band — shared visual language with the react-pdf surfaces.
+  // Dark slate matches PDF_TOKENS.colors.headerBand.
+  const pageWidth = doc.page.width;
+  const bandHeight = 56;
+  const bandPaddingX = 24;
+  const startY = doc.page.margins.top - 30;
+
+  doc.save();
+  doc.rect(0, 0, pageWidth, bandHeight).fill('#0f172a');
+  doc.fillColor('#ffffff');
+
+  if (opts.logoBuffer) {
+    try {
+      doc.image(opts.logoBuffer, bandPaddingX, (bandHeight - 32) / 2, {
+        fit: [120, 32],
+      });
+    } catch {
+      // Fall through to the text-name fallback if pdfkit can't decode.
+      if (opts.portName) {
+        doc
+          .fontSize(14)
+          .font('Helvetica-Bold')
+          .text(opts.portName, bandPaddingX, (bandHeight - 14) / 2, { lineBreak: false });
+      }
+    }
+  } else if (opts.portName) {
+    doc
+      .fontSize(14)
+      .font('Helvetica-Bold')
+      .text(opts.portName, bandPaddingX, (bandHeight - 14) / 2, { lineBreak: false });
+  }
+
   doc
-    .fontSize(24)
+    .fontSize(13)
     .font('Helvetica-Bold')
-    .fillColor('#000000')
-    .text(opts.documentName, { align: 'center' });
+    .text(opts.documentName, pageWidth / 2, (bandHeight - 13) / 2, {
+      align: 'right',
+      width: pageWidth - pageWidth / 2 - bandPaddingX,
+      lineBreak: false,
+    });
+  doc.restore();
+
+  // Move past the band and render the subheader below in black on white.
+  doc.y = bandHeight + 12;
   const subheader = opts.subheader ?? `Generated on ${new Date().toLocaleDateString()}`;
-  doc.fontSize(12).font('Helvetica').fillColor('#666666').text(subheader, { align: 'center' });
-  doc.fillColor('#000000').moveDown(1);
+  doc.fontSize(11).font('Helvetica').fillColor('#666666').text(subheader, { align: 'center' });
+  doc.fillColor('#000000').moveDown(0.8);
+  // Suppress unused-warning on startY (kept as a documentation anchor).
+  void startY;
 }
 
 function addSummaryBox(