Fix two critical bugs in v1.1.9

Bug 1: Admin - Both General and Composable tabs visible on initial load
- Added explicit display:none to #composable_product_data panel
- Panel now hidden by default, shows only when product-type-composable class is present
- Prevents both tabs showing simultaneously on new product creation

Bug 2: Frontend - No feedback when no products configured
- Added empty state message when products array is empty
- Users now see helpful message instead of blank grid
- Cleared Twig cache to ensure template changes take effect

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

templates/product-selector.twig

@@ -9,6 +9,11 @@
     </div>
 
     <div class="composable-products-grid">
+        {% if products is empty %}
+        <div class="composable-no-products">
+            <p>{{ __('No products available for selection. Please configure the product criteria in the admin panel.') }}</p>
+        </div>
+        {% else %}
         {% for product in products %}
         <div class="composable-product-item{% if not product.in_stock %} out-of-stock{% endif %}" data-product-id="{{ product.id }}" data-price="{{ product.price }}" data-stock-status="{{ product.stock_status }}">
             <div class="product-item-inner">
@@ -52,6 +57,7 @@
             </div>
         </div>
         {% endfor %}
+        {% endif %}
     </div>
 
     {% if show_total %}