Stabilize Cloudron SQLite and refine planner suggestions

nouri/templates/admin/categories.html

@@ -66,6 +66,12 @@
                         {% if category.is_active %}Pausieren{% else %}Wieder aktivieren{% endif %}
                     </button>
                 </form>
+                {% if category.name not in default_categories %}
+                    <form method="post" action="{{ url_for('admin.category_delete', category_id=category.id) }}">
+                        {{ csrf_input() }}
+                        <button class="ghost-button" type="submit">Löschen</button>
+                    </form>
+                {% endif %}
             </div>
         </article>
     {% endfor %}