feat: timetable refresh in 3 minutes

components/Timetable.tsx

@@ -244,6 +244,15 @@ const Timetable = ({
       refresh();
     };
     main();
+
+    // Auto refresh the entire timetable every 3 minutes
+    const fullRefreshInterval = setInterval(() => {
+      main();
+    }, 3 * 60 * 1000); // 3 minutes in milliseconds
+
+    return () => {
+      clearInterval(fullRefreshInterval);
+    };
   }, []);
 
   const DownloadMarks = async () => {