fix(core): PDF-Export — Footer-Leerseite behoben und Logo ueber Profilfoto

- Footer: doc.page.margins.bottom temporaer auf 0 gesetzt beim Footer-Zeichnen
  verhindert PDFKit Auto-Pagination (footerTextY > maxY wuerde sonst
  eine leere zweite Seite erzeugen)
- Logo: Platform-Branding-Logo (aus Redis platform_branding_logo) wird oben
  in der linken Spalte ueber dem Profilfoto gerendert (fit 180x50px)
- Firmendaten + Branding parallel via Promise.all aus Redis geladen

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

packages/core-service/src/core/expert-profile/profile-export.service.ts

@@ -192,12 +192,16 @@ export class ProfileExportService {
     const data = await this.expertProfileService.getExportData(userId) as ExportData;
     const profile = data.expertProfile;
 
-    // Firmendaten für PDF-Footer laden
+    // Firmendaten + Branding-Logo parallel laden
     let companyFooterText = '';
+    let platformLogo: Buffer | null = null;
     try {
-      const raw = await this.redis.get('platform_company_settings');
-      if (raw) {
-        const c = JSON.parse(raw) as Record<string, unknown>;
+      const [companyRaw, brandingRaw] = await Promise.all([
+        this.redis.get('platform_company_settings'),
+        this.redis.get('platform_branding_logo'),
+      ]);
+      if (companyRaw) {
+        const c = JSON.parse(companyRaw) as Record<string, unknown>;
         const address = [c['street'], [c['postalCode'], c['city']].filter(Boolean).join(' ')].filter(Boolean).join(', ');
         companyFooterText = [
           c['name'],
@@ -207,7 +211,13 @@ export class ProfileExportService {
           c['website'],
         ].filter(Boolean).join('  |  ');
       }
-    } catch { /* Firmendaten nicht verfügbar — kein Footer */ }
+      if (brandingRaw) {
+        const b = JSON.parse(brandingRaw) as Record<string, unknown>;
+        if (typeof b['logo'] === 'string' && b['logo']) {
+          platformLogo = this.base64ToBuffer(b['logo']);
+        }
+      }
+    } catch { /* Einstellungen nicht verfügbar */ }
     const fullName = `${data.firstName} ${data.lastName}`;
     const { firstName, lastName } = data;
 
@@ -236,6 +246,19 @@ export class ProfileExportService {
 
       // --- SEITE 1: Linke Spalte ---
 
+      // Platform-Logo (über dem Profilfoto)
+      if (platformLogo) {
+        try {
+          doc.image(platformLogo, leftColX, yLeft, {
+            fit: [leftColWidth, 50],
+            align: 'center',
+          });
+          yLeft += 58;
+        } catch (err) {
+          this.logger.warn('Platform-Logo konnte nicht gerendert werden', err);
+        }
+      }
+
       // Avatar (rundes Bild)
       if (data.avatar) {
         try {
@@ -497,16 +520,20 @@ export class ProfileExportService {
 
       // --- FOOTER: Firmendaten auf jeder Seite ---
       if (companyFooterText) {
-        const pageHeight = doc.page.height;
-        const footerLineY = pageHeight - 32;
-        const footerTextY = pageHeight - 26;
         const range = doc.bufferedPageRange();
         for (let p = range.start; p < range.start + range.count; p++) {
           doc.switchToPage(p);
+          // Bottom-Margin temporär auf 0, damit PDFKit keine Leerseite erzeugt
+          const origBottom = doc.page.margins.bottom;
+          doc.page.margins.bottom = 0;
+          const pageH = doc.page.height;
+          const footerLineY = pageH - 32;
+          const footerTextY = pageH - 26;
           doc.moveTo(40, footerLineY).lineTo(pageWidth - 40, footerLineY)
             .strokeColor('#cccccc').lineWidth(0.5).stroke();
           doc.font('Helvetica').fontSize(7).fillColor('#999999');
           doc.text(companyFooterText, 40, footerTextY, { width: pageWidth - 80, align: 'center', lineBreak: false });
+          doc.page.margins.bottom = origBottom;
         }
       }