feat(static): improve static files handling and permissions in Docker

- Add script to set correct permissions on static files after collectstatic
- Introduce collectstatic command in entrypoint with permission fixing
- Add WhiteNoise middleware for efficient static file serving without DB access
- Configure WhiteNoise static files storage backend in settings
- Set STATIC_ROOT path properly for Docker container environment
- Add fallback static files serving in Django urls for production without nginx
- Enhance inventory_detail.html scripts to log errors if JS files or components fail to load
- Add whitenoise package to requirements for static file serving support

myproject/inventory/templates/inventory/inventory/inventory_detail.html

@@ -284,12 +284,25 @@
 {% endif %}
 
 <!-- Подключаем JavaScript -->
-<script src="{% static 'products/js/product-search-picker.js' %}"></script>
-<script src="{% static 'inventory/js/inventory_detail.js' %}"></script>
+<script src="{% static 'products/js/product-search-picker.js' %}" onerror="console.error('Failed to load product-search-picker.js');"></script>
+<script src="{% static 'inventory/js/inventory_detail.js' %}" onerror="console.error('Failed to load inventory_detail.js');"></script>
 <script>
 document.addEventListener('DOMContentLoaded', function() {
+    // Проверка загрузки ProductSearchPicker
+    if (typeof ProductSearchPicker === 'undefined') {
+        console.error('ProductSearchPicker is not defined. Check if product-search-picker.js loaded correctly.');
+        console.error('Script URL: {% static "products/js/product-search-picker.js" %}');
+        return;
+    }
+    
     // Инициализация компонента поиска товаров
     {% if inventory.status != 'completed' %}
+    const pickerElement = document.querySelector('#inventory-product-picker');
+    if (!pickerElement) {
+        console.error('Picker container #inventory-product-picker not found');
+        return;
+    }
+    
     const picker = ProductSearchPicker.init('#inventory-product-picker', {
         onAddSelected: function(product, instance) {
             if (product) {
@@ -298,6 +311,10 @@ document.addEventListener('DOMContentLoaded', function() {
             }
         }
     });
+    
+    if (!picker) {
+        console.error('Failed to initialize ProductSearchPicker');
+    }
     {% endif %}
 
     // Инициализация обработчиков