Fix: Set unit price to zero for 'STAKE' type in activity form

apps/client/src/app/pages/portfolio/activities/create-or-update-activity-dialog/create-or-update-activity-dialog.component.ts

@@ -301,6 +301,10 @@ export class CreateOrUpdateActivityDialog implements OnDestroy {
       .get('type')
       .valueChanges.pipe(takeUntil(this.unsubscribeSubject))
       .subscribe((type: Type) => {
+        if (type === 'STAKE') {
+          this.activityForm.get('unitPrice').setValue(0);
+        }
+
         if (type === 'ITEM') {
           this.activityForm
             .get('accountId')