Use signals on home page.

frontend/src/app/pages/home/home.component.html

@@ -1,5 +1,5 @@
 <h1 i18n>Last publications</h1>
-@if ((isLoading$ | async) === true) {
+@if (isLoading()) {
     <h2 i18n>Publications loading...</h2>
     <mat-spinner></mat-spinner>
 } @else {

frontend/src/app/pages/home/home.component.ts

@@ -1,6 +1,6 @@
-import { Component, OnInit, inject } from '@angular/core';
+import { Component, OnDestroy, OnInit, inject, signal } from '@angular/core';
 import { MatProgressSpinnerModule } from '@angular/material/progress-spinner';
-import { Observable } from 'rxjs';
+import { Observable, Subscription } from 'rxjs';
 import { PublicationListComponent } from '../../components/publication-list/publication-list.component';
 import { Publication } from '../../core/rest-services/publications/model/publication';
 import { HomeService } from './home.service';
@@ -18,18 +18,27 @@ import { CommonModule } from '@angular/common';
   styleUrl: './home.component.scss',
   providers: [HomeService]
 })
-export class HomeComponent implements OnInit {
+export class HomeComponent implements OnInit, OnDestroy {
   private homeService = inject(HomeService);
-
-  get isLoading$(): Observable<boolean> {
-    return this.homeService.isLoading$;
-  }
+  private isLoadingSubscription?: Subscription;
+  private publicationsSubscription?: Subscription;
+  isLoading = signal(false);
+  publicationsIsEmpty = signal(true);
 
   get publications$(): Observable<Publication[]> {
     return this.homeService.publications$;
   }
-
+  
   ngOnInit(): void {
+    this.isLoadingSubscription = this.homeService.isLoading$
+      .subscribe(isLoading => this.isLoading.set(isLoading));
+    this.publicationsSubscription = this.homeService.publications$
+      .subscribe(publications => this.publicationsIsEmpty.set(publications.length > 0));
     this.homeService.startLatestPublicationsRetrieving();
   }
+
+  ngOnDestroy(): void {
+    this.isLoadingSubscription?.unsubscribe();
+    this.publicationsSubscription?.unsubscribe();
+  }
 }