complete new audit system

backend/src/services/appSetting.service.ts

@@ -1,6 +1,4 @@
-import { PrismaClient } from '@prisma/client';
-
-const prisma = new PrismaClient();
+import prisma from '../lib/prisma.js';
 
 // Default settings
 const DEFAULT_SETTINGS: Record<string, string> = {