first validation

bizmatch/src/app/pages/details/details-business-listing/details-business-listing.component.html

@@ -90,12 +90,14 @@
                 <label for="notes" class="font-medium text-900">Questions/Comments</label>
                 <textarea id="notes" pInputTextarea [autoResize]="true" [rows]="5" [(ngModel)]="mailinfo.sender.comments"></textarea>
               </div>
+              @if(listingUser){
               <div class="surface-border mb-4 col-12 flex align-items-center">
                 Listing by &nbsp;<a routerLink="/details-user/{{ listingUser.id }}" class="mr-2">{{ listingUser.firstname }} {{ listingUser.lastname }}</a>
                 @if(listingUser.hasCompanyLogo){
                 <img src="{{ env.imageBaseUrl }}/pictures/logo/{{ listingUser.id }}.avif?_ts={{ ts }}" class="mr-5 lg:mb-0" style="height: 30px; max-width: 100px" />
                 }
               </div>
+              }
             </div>
             <button pButton pRipple label="Submit" icon="pi pi-file" class="w-auto" (click)="mail()"></button>
           </div>