fix: render shortened names as initial and surname

templates/board/_spot.html.twig

@@ -45,9 +45,10 @@
         {% if booking.user.id == app.user.id %}
             {% set who = 'du' %}
         {% else %}
-            {# "Anna Berger" -> "Anna B." : keeps a card on one line per booking at phone width. #}
+            {# "Anna Berger" -> "A. Berger" : keeps a card on one line per booking at phone width,
+               and the surname tells two Annas apart where the initial would not. #}
             {% set parts = booking.user.name|split(' ')|filter(part => part is not empty) %}
-            {% set who = parts|length > 1 ? parts|first ~ ' ' ~ parts|last|slice(0, 1) ~ '.' : booking.user.name %}
+            {% set who = parts|length > 1 ? parts|first|slice(0, 1) ~ '. ' ~ parts|last : booking.user.name %}
         {% endif %}
         {% set lines = lines|merge([who ~ (booking.timeRange.allDay ? '' : ' ' ~ booking.timeRange)]) %}
     {% endfor %}