{# read and display all flash messages #}
{% for label, messages in app.flashes %}
    {% for message in messages %}
        <div class="alert alert-dismissible alert-{{label}} m-4">
            <button type="button" class="btn-close" data-bs-dismiss="alert"></button>
            <p class="mb-0">{{message}}</p>
        </div>
    {% endfor %}
{% endfor %}