complete new audit system

backend/src/controllers/invoice.controller.ts

@@ -1,5 +1,6 @@
 import { Request, Response } from 'express';
 import * as invoiceService from '../services/invoice.service.js';
+import { logChange } from '../services/audit.service.js';
 import { ApiResponse } from '../types/index.js';
 
 /**
@@ -69,6 +70,12 @@ export async function addInvoice(req: Request, res: Response): Promise<void> {
       notes,
     });
 
+    await logChange({
+      req, action: 'CREATE', resourceType: 'Invoice',
+      resourceId: invoice.id.toString(),
+      label: `Rechnung (${invoiceType}) hinzugefügt`,
+    });
+
     res.status(201).json({ success: true, data: invoice } as ApiResponse);
   } catch (error) {
     console.error('addInvoice error:', error);
@@ -95,6 +102,12 @@ export async function updateInvoice(req: Request, res: Response): Promise<void>
       notes,
     });
 
+    await logChange({
+      req, action: 'UPDATE', resourceType: 'Invoice',
+      resourceId: invoiceId.toString(),
+      label: `Rechnung aktualisiert`,
+    });
+
     res.json({ success: true, data: invoice } as ApiResponse);
   } catch (error) {
     console.error('updateInvoice error:', error);
@@ -115,6 +128,12 @@ export async function deleteInvoice(req: Request, res: Response): Promise<void>
 
     await invoiceService.deleteInvoice(ecdId, invoiceId);
 
+    await logChange({
+      req, action: 'DELETE', resourceType: 'Invoice',
+      resourceId: invoiceId.toString(),
+      label: `Rechnung gelöscht`,
+    });
+
     res.json({ success: true, data: null } as ApiResponse);
   } catch (error) {
     console.error('deleteInvoice error:', error);