Add kit binding display in ConfigurableKitProduct templates

Updated UI to show ProductKit associations for attribute values:

- configurablekit_detail.html:
  * Added 'Комплект' column to attributes table
  * Shows linked ProductKit as clickable badge
  * Shows '—' for unbound attributes

- configurablekit_list.html:
  * Added 'Атрибутов' column showing attribute count
  * Updated colspan for empty state message (6->7)

Now users can see which ProductKit each attribute value is bound to in:
1. Detail view: Click product -> view attributes with kit bindings
2. List view: See total attribute count for each product

🤖 Generated with Claude Code

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

myproject/products/templates/products/configurablekit_detail.html

@@ -139,6 +139,7 @@
                                     <tr>
                                         <th>Название атрибута</th>
                                         <th>Значение опции</th>
+                                        <th>Комплект</th>
                                         <th>Порядок</th>
                                         <th>Видимый</th>
                                     </tr>
@@ -148,6 +149,15 @@
                                     <tr>
                                         <td><strong>{{ attr.name }}</strong></td>
                                         <td>{{ attr.option }}</td>
+                                        <td>
+                                            {% if attr.kit %}
+                                                <a href="{% url 'products:productkit-detail' attr.kit.pk %}" class="text-decoration-none badge bg-info text-dark">
+                                                    {{ attr.kit.name }}
+                                                </a>
+                                            {% else %}
+                                                <span class="badge bg-secondary">—</span>
+                                            {% endif %}
+                                        </td>
                                         <td><span class="badge bg-secondary">{{ attr.position }}</span></td>
                                         <td>
                                             {% if attr.visible %}

myproject/products/templates/products/configurablekit_list.html

@@ -59,6 +59,7 @@
                         <th>Артикул</th>
                         <th style="width: 120px;">Статус</th>
                         <th style="width: 100px;">Вариантов</th>
+                        <th style="width: 120px;">Атрибутов</th>
                         <th style="width: 150px;">Дата создания</th>
                         <th style="width: 180px;">Действия</th>
                     </tr>
@@ -86,6 +87,9 @@
                         <td class="text-center">
                             <span class="badge bg-info">{{ item.options.count }}</span>
                         </td>
+                        <td class="text-center">
+                            <span class="badge bg-secondary">{{ item.parent_attributes.count }}</span>
+                        </td>
                         <td><small class="text-muted">{{ item.created_at|date:"d.m.Y H:i" }}</small></td>
                         <td>
                             <a href="{% url 'products:configurablekit-detail' item.pk %}"
@@ -104,7 +108,7 @@
                     </tr>
                     {% empty %}
                     <tr>
-                        <td colspan="6" class="text-center text-muted py-4">
+                        <td colspan="7" class="text-center text-muted py-4">
                             Нет вариативных товаров. <a href="{% url 'products:configurablekit-create' %}">Создать первый</a>
                         </td>
                     </tr>