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]/contract-pdf/route.ts

@@ -0,0 +1,73 @@
+import { NextRequest, NextResponse } from 'next/server';
+import { getServerSession } from 'next-auth';
+import { authOptions } from '@/lib/auth';
+import { prisma } from '@/lib/prisma';
+import { generateContractFromTemplate } from '@/lib/pdf-template-service';
+
+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 },
+      include: {
+        location: true,
+        photobox: true,
+      },
+    });
+
+    if (!booking) {
+      return NextResponse.json({ error: 'Buchung nicht gefunden' }, { status: 404 });
+    }
+
+    let priceConfig = null;
+    if (booking.photobox?.model && booking.locationId) {
+      priceConfig = await prisma.priceConfig.findUnique({
+        where: {
+          locationId_model: {
+            locationId: booking.locationId,
+            model: booking.photobox.model,
+          },
+        },
+      });
+    }
+
+    const bookingWithPriceConfig = {
+      ...booking,
+      priceConfig,
+    };
+
+    const signatureData = booking.contractSignedOnline ? booking.contractSignatureData : undefined;
+
+    const pdfBuffer = await generateContractFromTemplate(
+      bookingWithPriceConfig,
+      booking.location,
+      booking.photobox,
+      signatureData
+    );
+
+    return new NextResponse(pdfBuffer, {
+      status: 200,
+      headers: {
+        'Content-Type': 'application/pdf',
+        'Content-Disposition': `attachment; filename="Mietvertrag_${booking.bookingNumber}.pdf"`,
+      },
+    });
+
+  } catch (error: any) {
+    console.error('❌ Contract-PDF-Download Fehler:', error);
+    return NextResponse.json(
+      { error: error.message || 'PDF-Download fehlgeschlagen' },
+      { status: 500 }
+    );
+  }
+}