Remove redundant comment in AppealDiscord and enhance state handling in SentComponent.

frontend/src/app/pages/forms/sent/sent.component.ts

@@ -16,11 +16,11 @@ export class SentComponent implements OnInit {
   private router: Router = inject(Router)
 
   ngOnInit() {
-    const navigation = this.router.getCurrentNavigation();
-    const state = navigation?.extras.state as { message: string };
+    const state = this.router.getCurrentNavigation()?.extras.state || history.state;
 
-    if (state?.message) {
-      this.message = state.message;
+    if (state && 'message' in state) {
+      this.message = state.message as string;
     }
   }
+
 }