feat: add admin views, a booking horizon and confirmation modals

Co-Authored-By: Claude Opus 5 <[email protected]>

templates/booking/_modal_release.html.twig

@@ -0,0 +1,22 @@
+{% extends 'htmx_confirmation_modal.html.twig' %}
+
+{% block title %}Buchung freigeben?{% endblock %}
+
+{% block content %}
+    <p>
+        {{ booking.resource.type.label }} <em>{{ booking.resource.label }}</em>
+        {%- if booking.resource.group %} ({{ booking.resource.group.label }}){% endif %}
+        am {{ booking.date|format_datetime(pattern: 'EEEE, d. MMMM y') }}, {{ booking.timeRange }}
+        {% if not booking.belongsTo(app.user) %}
+            — gebucht von <em>{{ booking.user.name }}</em>
+        {% endif %}
+    </p>
+
+    {% if booking.partOfSeries %}
+        <p class="pt-3 text-sm text-gray-500">
+            Teil einer Serie: {{ booking.series.describe }}. Es wird nur dieser Tag freigegeben.
+        </p>
+    {% endif %}
+{% endblock %}
+
+{% block button_confirm %}Freigeben{% endblock %}