feat: started manhwa scrolling

apps/NwaifuAnime/src/app/services/notification/notification.service.ts

@@ -1,11 +1,11 @@
-import { Injectable } from "@angular/core";
+import { Injectable, OnDestroy } from "@angular/core";
 import { Subject } from "rxjs";
 import { INotification } from "./notification.dto";
 
 @Injectable({
   providedIn: "root",
 })
-export class NotificationService {
+export class NotificationService implements OnDestroy {
   readonly notification$ = new Subject<INotification>();
 
   private sendNotification(message: INotification) {
@@ -29,4 +29,8 @@ export class NotificationService {
       name: title,
     });
   }
+
+  ngOnDestroy(): void {
+    this.notification$.complete();
+  }
 }