feat: Equipment-System, Buchungsbearbeitung, Kundenadresse, LexOffice-Fix

- Vintage Modell hinzugefuegt
- Equipment Multi-Select (Neue Buchung + Bearbeitung)
- Kundenadresse in Formularen
- Bearbeiten-Seite fuer Buchungen
- Abbau-Zeiten in Formularen und Uebersicht
- Vertrag PDF nur bei Privatkunden
- LexOffice Kontakt-Erstellung Fix (BUSINESS)
- Zurueck-Pfeil auf Touren-Seite

app/api/bookings/[id]/quotation-pdf/route.ts

@@ -0,0 +1,54 @@
+import { NextRequest, NextResponse } from 'next/server';
+import { getServerSession } from 'next-auth';
+import { authOptions } from '@/lib/auth';
+import { prisma } from '@/lib/prisma';
+import { lexofficeService } from '@/lib/lexoffice';
+
+export async function GET(
+  request: NextRequest,
+  { params }: { params: { id: string } }
+) {
+  try {
+    const session = await getServerSession(authOptions);
+
+    if (!session || session.user.role !== 'ADMIN') {
+      return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
+    }
+
+    const bookingId = params.id;
+
+    const booking = await prisma.booking.findUnique({
+      where: { id: bookingId },
+      select: {
+        id: true,
+        bookingNumber: true,
+        lexofficeOfferId: true,
+      },
+    });
+
+    if (!booking) {
+      return NextResponse.json({ error: 'Buchung nicht gefunden' }, { status: 404 });
+    }
+
+    if (!booking.lexofficeOfferId) {
+      return NextResponse.json({ error: 'Kein LexOffice Angebot vorhanden' }, { status: 404 });
+    }
+
+    const pdfBuffer = await lexofficeService.getQuotationPDF(booking.lexofficeOfferId);
+
+    return new NextResponse(pdfBuffer, {
+      status: 200,
+      headers: {
+        'Content-Type': 'application/pdf',
+        'Content-Disposition': `attachment; filename="Angebot_${booking.bookingNumber}.pdf"`,
+      },
+    });
+
+  } catch (error: any) {
+    console.error('❌ PDF-Download Fehler:', error);
+    return NextResponse.json(
+      { error: error.message || 'PDF-Download fehlgeschlagen' },
+      { status: 500 }
+    );
+  }
+}