feat: add human-readable datetime filter and update playlist info template

app/filters.py

@@ -97,3 +97,8 @@ def jellyfin_link(jellyfin_id: str) -> Markup:
 
     link = f"{jellyfin_server_url}/web/#/details?id={jellyfin_id}"
     return Markup(f'<a href="{link}" target="_blank">{jellyfin_id}</a>')
+
+# A template filter for displaying a datetime in a human-readable format
+@template_filter('human_datetime')
+def human_datetime(dt) -> str:
+    return dt.strftime('%Y-%m-%d %H:%M:%S')

templates/partials/_playlist_info.html

@@ -7,7 +7,7 @@
         <h1>{{ item.name }}</h1>
         <p>{{ item.description }}</p>
         <p>{{ item.track_count }} songs, {{ total_duration }}</p>
-        <p>Last Updated: {{ item.last_updated}} | Last Change: {{ item.last_changed}}</p>
+        <p>Last Updated: {{ item.last_updated | human_datetime}} | Last Change: {{ item.last_changed | human_datetime}}</p>
         {% include 'partials/_add_remove_button.html' %}
         {% if session['is_admin'] and item.jellyfin_id %}
         <p>