complete new audit system

backend/src/controllers/emailProvider.controller.ts

@@ -2,6 +2,7 @@
 
 import { Request, Response } from 'express';
 import * as emailProviderService from '../services/emailProvider/emailProviderService.js';
+import { logChange } from '../services/audit.service.js';
 import { ApiResponse } from '../types/index.js';
 
 // ==================== CONFIG CRUD ====================
@@ -43,6 +44,11 @@ export async function getProviderConfig(req: Request, res: Response): Promise<vo
 export async function createProviderConfig(req: Request, res: Response): Promise<void> {
   try {
     const config = await emailProviderService.createProviderConfig(req.body);
+    await logChange({
+      req, action: 'CREATE', resourceType: 'EmailProviderConfig',
+      resourceId: config.id.toString(),
+      label: `E-Mail-Provider ${config.name} angelegt`,
+    });
     res.status(201).json({ success: true, data: config } as ApiResponse);
   } catch (error) {
     res.status(400).json({
@@ -56,6 +62,11 @@ export async function updateProviderConfig(req: Request, res: Response): Promise
   try {
     const id = parseInt(req.params.id);
     const config = await emailProviderService.updateProviderConfig(id, req.body);
+    await logChange({
+      req, action: 'UPDATE', resourceType: 'EmailProviderConfig',
+      resourceId: id.toString(),
+      label: `E-Mail-Provider ${config.name} aktualisiert`,
+    });
     res.json({ success: true, data: config } as ApiResponse);
   } catch (error) {
     res.status(400).json({
@@ -68,7 +79,13 @@ export async function updateProviderConfig(req: Request, res: Response): Promise
 export async function deleteProviderConfig(req: Request, res: Response): Promise<void> {
   try {
     const id = parseInt(req.params.id);
+    const config = await emailProviderService.getProviderConfigById(id);
     await emailProviderService.deleteProviderConfig(id);
+    await logChange({
+      req, action: 'DELETE', resourceType: 'EmailProviderConfig',
+      resourceId: id.toString(),
+      label: `E-Mail-Provider ${config?.name || id} gelöscht`,
+    });
     res.json({ success: true, message: 'Email-Provider gelöscht' } as ApiResponse);
   } catch (error) {
     res.status(400).json({