Pick images, pages, forms, sections and terms instead of typing ids and addresses

The share image and featured image of a page become image fields with the library dialog,
as do image settings of plugins. The editor offers forms, sections, categories and tags as
lists, a page search next to every link target and in text links, the redirect target has a
page search, and the form editor picks the reply field, the condition and the option images.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

templates/admin/plugins.html.twig

@@ -2,13 +2,17 @@
 {% set nav = 'plugins' %}
 {% block title %}Plugins{% endblock %}
 {% block heading %}Plugins{% endblock %}
+{% block styles %}<link rel="stylesheet" href="/assets/media-dialog.css?v={{ kant_version() }}">{% endblock %}
+{% block scripts %}<script type="module" src="/assets/media-field.js?v={{ kant_version() }}"></script>{% endblock %}
 {% block lead %}Erweiterungen bringen eigene Bausteine, Vorlagen und Adressen mit. Sie liegen als Ordner unter <code>plugins/</code>; hier schaltest du sie ein und aus und stellst sie ein. Ein ausgeschaltetes Plugin lässt seine Bausteine in den Seiten stehen, zeigt sie aber nicht mehr.{% endblock %}
 
 {# Ein Feld aus dem Schema eines Plugins - dieselben sieben Arten wie im Editor. #}
 {% macro feld(plugin, key, schema, value) %}
 {% set id = 'plugin-' ~ plugin ~ '-' ~ key %}
 {% set name = 'settings[' ~ key ~ ']' %}
-{% if schema.kind == 'boolean' %}
+{% if schema.kind == 'media' %}
+<div>{% include 'admin/media-field.html.twig' with {id: id, name: name, label: schema.label, value: value|default(''), help: schema.help|default('')} only %}</div>
+{% elseif schema.kind == 'boolean' %}
 <div><label class="check-label" for="{{ id }}"><input id="{{ id }}" type="checkbox" name="{{ name }}" value="1"{{ value ? ' checked' : '' }}> {{ schema.label }}</label>{% if schema.help %}<p class="field-help">{{ schema.help }}</p>{% endif %}</div>
 {% else %}
 <div>
@@ -16,7 +20,6 @@
     {% if schema.kind == 'textarea' %}<textarea id="{{ id }}" name="{{ name }}" rows="3" maxlength="{{ schema.maxLength }}">{{ value }}</textarea>
     {% elseif schema.kind == 'select' %}<select id="{{ id }}" name="{{ name }}">{% for wert, text in schema.choices %}<option value="{{ wert }}"{{ value == wert ? ' selected' : '' }}>{{ text }}</option>{% endfor %}</select>
     {% elseif schema.kind == 'number' %}<input id="{{ id }}" name="{{ name }}" type="number" step="any" min="{{ schema.min }}" max="{{ schema.max }}" value="{{ value }}">
-    {% elseif schema.kind == 'media' %}<input id="{{ id }}" name="{{ name }}" value="{{ value }}" placeholder="Kennung aus der Mediathek" pattern="[a-f0-9]{32}">
     {% else %}<input id="{{ id }}" name="{{ name }}" value="{{ value }}" maxlength="{{ schema.maxLength }}">{% endif %}
     {% if schema.help %}<p class="field-help">{{ schema.help }}</p>{% endif %}
 </div>