feat: admin editable email templates

addresses #869eg7ptr

templates/admin/system/email_text/_form.html.twig

@@ -0,0 +1,27 @@
+{{ form_start(form) }}
+<div class="flex flex-col space-y-4 pb-8">
+    {{ form_row(form.subject) }}
+    {{ form_row(form.headline) }}
+    {{ form_row(form.body) }}
+
+    <div class="bg-gray-100 rounded-md p-4 text-sm">
+        <div class="font-bold pb-2">
+            Verfügbare Platzhalter
+        </div>
+        <ul class="space-y-1">
+            {% for name, description in definition.placeholders %}
+                <li>
+                    <code class="font-bold">{{ '{' ~ name ~ '}' }}</code> &ndash; {{ description }}
+                </li>
+            {% endfor %}
+        </ul>
+        <div class="pt-2">
+            Platzhalter ohne Wert werden als <code class="font-bold">-</code> ausgegeben.
+        </div>
+    </div>
+</div>
+<button type="submit" class="btn">
+    Speichern
+</button>
+{{ form_rest(form) }}
+{{ form_end(form) }}

templates/admin/system/email_text/index.html.twig

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+{% extends 'admin/layout.html.twig' %}
+
+{% block title %}Einstellungen - E-Mail-Texte{% endblock %}
+
+{% block content %}
+    <h1 class="text-2xl font-bold pb-2">
+        E-Mail-Texte
+    </h1>
+    <div class="data-table-wrapper">
+        <div class="data-table-wrapper__inner">
+            <table class="data-table">
+                <thead>
+                <tr>
+                    <th>
+                        E-Mail
+                    </th>
+                    <th>
+                        Betreff
+                    </th>
+                    <th>
+                        Status
+                    </th>
+                    <th></th>
+                </tr>
+                </thead>
+                <tbody>
+                {% for key, definition in definitions %}
+                    {% set emailText = emailTexts[key]|default(null) %}
+                    <tr>
+                        <td>
+                            {{ definition.label }}
+                        </td>
+                        <td>
+                            {{ emailText ? emailText.subject : definition.defaultSubject }}
+                        </td>
+                        <td>
+                            {% if emailText %}
+                                Angepasst
+                            {% else %}
+                                Standard
+                            {% endif %}
+                        </td>
+                        <td>
+                            <div class="flex items-center space-x-2 justify-end">
+                                {% if emailText %}
+                                    <button type="button"
+                                            class="text-red-500"
+                                            title="Auf Standardtext zurücksetzen"
+                                            hx-get="{{ path('app_admin_system_email_text_reset', { 'key': key }) }}"
+                                            hx-target="body"
+                                            hx-swap="beforeend">
+                                        {{ icon('refresh') }}
+                                    </button>
+                                {% endif %}
+                                <button type="button"
+                                        title="Vorschau anzeigen"
+                                        hx-get="{{ path('app_admin_system_email_text_preview', { 'key': key }) }}"
+                                        hx-target="body"
+                                        hx-swap="beforeend">
+                                    {{ icon('eye') }}
+                                </button>
+                                <button type="button"
+                                        title="E-Mail-Text bearbeiten"
+                                        hx-get="{{ path('app_admin_system_email_text_edit', { 'key': key }) }}"
+                                        hx-target="body"
+                                        hx-swap="beforeend">
+                                    {{ icon('edit') }}
+                                </button>
+                            </div>
+                        </td>
+                    </tr>
+                {% endfor %}
+                </tbody>
+            </table>
+        </div>
+    </div>
+{% endblock %}

templates/admin/system/email_text/modal_edit.html.twig

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+{% extends 'htmx_modal.html.twig' %}
+
+{% block title %}{{ definition.label }}{% endblock %}
+
+{% block content %}
+    {% include 'admin/system/email_text/_form.html.twig' %}
+{% endblock %}

templates/admin/system/email_text/modal_preview.html.twig

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+{% extends 'htmx_modal.html.twig' %}
+
+{% block title %}Vorschau: {{ definition.label }}{% endblock %}
+
+{% block content %}
+    <div class="pb-4">
+        <span class="font-bold">Betreff:</span> {{ text.subject }}
+    </div>
+    {# The renderer escaped everything before it added a tag, see RenderedEmailTextDto. #}
+    <div class="border border-gray-200 rounded-md p-4">
+        {% if text.headline is not empty %}
+            <h1 class="text-xl font-bold pb-2">{{ text.headline | raw }}</h1>
+        {% endif %}
+        {# The paragraphs come from the mail body, where email/layout.html.twig styles every
+           <p> with padding-bottom:16px - pb-4 is the same spacing, so the preview matches. #}
+        <div class="[&>p]:pb-4 [&_a]:underline">
+            {{ text.bodyHtml | raw }}
+        </div>
+        <p>
+            <span class="btn inline-block">Zum Portal</span>
+        </p>
+    </div>
+    <div class="pt-4 text-sm text-gray-500">
+        Platzhalter sind als <code>[name]</code> dargestellt und werden beim Versand durch
+        die echten Werte ersetzt. Logo und Fußzeile der E-Mail sind hier nicht abgebildet.
+    </div>
+{% endblock %}

templates/admin/system/email_text/modal_reset.html.twig

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+{% extends 'htmx_confirmation_modal.html.twig' %}
+
+{% block content %}
+    <div class="pb-4">
+        Möchtest du den Text der E-Mail <em>{{ definition.label }}</em> wirklich auf den
+        Standardtext zurücksetzen? Deine Änderungen gehen dabei verloren.
+    </div>
+{% endblock %}
+
+{% block button_confirm %}Zurücksetzen{% endblock %}