bitwarden-estensione-browser/src/app/tools/tools.component.html

<div class="container page-content">
    <div class="row">
        <div class="col-3">
            <div class="card">
                <div class="card-header">Tools</div>
                <div class="list-group list-group-flush">
                    <a routerLink="import" class="list-group-item" routerLinkActive="active">
                        Import
                    </a>
                    <a routerLink="export" class="list-group-item" routerLinkActive="active">
                        Export</a>
                </div>
            </div>
        </div>
        <div class="col-9">
            <router-outlet></router-outlet>
        </div>
    </div>
</div>