fix:time display

backend/server.js

@@ -10,6 +10,7 @@ import dotenv from 'dotenv';
 import mysql from 'mysql2/promise';
 import managerRoutes from './managerRoutes.js';
 import workerRoutes from './workerRoutes.js';
+import { APP_TIMEZONE } from './config/db.js'
 
 async function startServer() {
   dotenv.config({ path: path.join(path.dirname(fileURLToPath(import.meta.url)), '.env') });
@@ -25,7 +26,7 @@ async function startServer() {
     waitForConnections: true,
     connectionLimit: 10,
     queueLimit: 0,
-    timezone: 'Z',
+    timezone: APP_TIMEZONE,
     dateStrings: true
   });