add system log viewer

templates/admin/system_logs/index.html.twig

@@ -0,0 +1,48 @@
+{% extends 'admin/base.html.twig' %}
+
+{% block title %}System Logs{% endblock %}
+
+{% block body %}
+    <div class="d-flex justify-content-between align-items-center mb-4">
+        <h1 class="h3 mb-0">System Logs</h1>
+    </div>
+
+    <div class="card bg-dark border-secondary">
+        <div class="card-body p-0">
+            <table class="table table-dark table-striped mb-0">
+                <thead>
+                <tr>
+                    <th>Datei</th>
+                    <th>Größe</th>
+                    <th>Letzte Änderung</th>
+                    <th></th>
+                </tr>
+                </thead>
+                <tbody>
+                {% for file in files %}
+                    <tr>
+                        <td>{% set date = file.name == 'system.log'
+                                ? 'current'
+                                : file.name|replace({'system-':'','\.log':''}) %}
+                        {{ file.name }}</td>
+                        <td>{{ (file.size / 1024)|number_format(2) }} KB</td>
+                        <td>{{ file.mtime|date('Y-m-d H:i:s') }}</td>
+                        <td>
+                            <a href="{{ path('admin_system_logs_view', { date: date }) }}"
+                               class="btn btn-sm btn-outline-info">
+                                Anzeigen
+                            </a>
+                        </td>
+                    </tr>
+                {% else %}
+                    <tr>
+                        <td colspan="4" class="text-center text-muted p-3">
+                            Keine Logdateien gefunden.
+                        </td>
+                    </tr>
+                {% endfor %}
+                </tbody>
+            </table>
+        </div>
+    </div>
+{% endblock %}