Adjust loadStaffData method to handle timezones accurately in Staff Playtime component.

frontend/src/app/pages/head-mod/staff-pt/staff-pt.component.ts

@@ -87,7 +87,10 @@ export class StaffPtComponent implements OnInit {
   }
 
   private loadStaffData(from: Date, to: Date) {
-    this.siteService.getStaffPlaytime(from.toISOString(), to.toISOString())
+    const fromUtc = new Date(from.getTime() - from.getTimezoneOffset() * 60000);
+    const toUtc = new Date(to.getTime() - to.getTimezoneOffset() * 60000);
+
+    this.siteService.getStaffPlaytime(fromUtc.toISOString(), toUtc.toISOString())
       .subscribe({
         next: data => this.staffPt.set(data ?? []),
         error: err => console.error('Error getting staff playtime:', err)