fix: make the alert easier to read

hiboo/templates/base.html

@@ -82,7 +82,9 @@
                 <section class="content">
                     <div class="container-fluid">
                         {% for category, message in get_flashed_messages(with_categories=True) or [] %}
-                        <div class="alert alert-{{ category or "info" }}">{{ message }}</div>
+                        <div class="col-md-6 col">
+                            <div class="alert alert-{{ category or "info" }}">{{ message }}</div>
+                        </div>
                         {% endfor %}
 						{% if current_user.time_to_deletion and current_user.time_to_deletion() %}
 						<div class="alert alert-warning">{% trans %}Your account has no active profile, it will be deleted in{% endtrans %} {{ utils.babel.dates.format_timedelta(current_user.time_to_deletion()) }}</div>