added contract history

backend/src/controllers/contract.controller.ts

@@ -2,6 +2,7 @@ import { Request, Response } from 'express';
 import { PrismaClient } from '@prisma/client';
 import * as contractService from '../services/contract.service.js';
 import * as contractCockpitService from '../services/contractCockpit.service.js';
+import * as contractHistoryService from '../services/contractHistory.service.js';
 import { ApiResponse, AuthRequest } from '../types/index.js';
 
 const prisma = new PrismaClient();
@@ -116,9 +117,38 @@ export async function deleteContract(req: Request, res: Response): Promise<void>
   }
 }
 
-export async function createFollowUp(req: Request, res: Response): Promise<void> {
+export async function createFollowUp(req: AuthRequest, res: Response): Promise<void> {
   try {
-    const contract = await contractService.createFollowUpContract(parseInt(req.params.id));
+    const previousContractId = parseInt(req.params.id);
+
+    // Vorgängervertrag laden für Vertragsnummer
+    const previousContract = await prisma.contract.findUnique({
+      where: { id: previousContractId },
+      select: { contractNumber: true },
+    });
+
+    if (!previousContract) {
+      res.status(404).json({ success: false, error: 'Vorgängervertrag nicht gefunden' } as ApiResponse);
+      return;
+    }
+
+    const contract = await contractService.createFollowUpContract(previousContractId);
+    const createdBy = req.user?.email || 'unbekannt';
+
+    // Historie-Eintrag für den Vorgängervertrag erstellen
+    await contractHistoryService.createFollowUpHistoryEntry(
+      previousContractId,
+      contract.contractNumber,
+      createdBy
+    );
+
+    // Historie-Eintrag für den neuen Folgevertrag erstellen
+    await contractHistoryService.createNewContractFromPredecessorEntry(
+      contract.id,
+      previousContract.contractNumber,
+      createdBy
+    );
+
     res.status(201).json({ success: true, data: contract } as ApiResponse);
   } catch (error) {
     res.status(400).json({