Fix image upload structure for Miravia API compliance

🔧 Bug Fixes:
- Fixed product image structure to match Miravia API requirements
- Updated MiraviaProduct.php getData() method to wrap images in {"Image": [...]} format
- Updated MiraviaCombination.php getData() method to wrap SKU images properly
- Resolved error "[4224] The Main image of the product is required"

📋 Changes:
- Modified getData() methods to transform flat image arrays to nested structure
- Product images: images[] → Images: {"Image": [...]}
- SKU images: images[] → Images: {"Image": [...]}
- Maintains backward compatibility for empty image arrays

🎯 Impact:
- Product uploads will now pass Miravia's image validation
- Both product-level and SKU-level images properly formatted
- Complies with official Miravia API documentation structure

🤖 Generated with Claude Code (https://claude.ai/code)

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

connector-miravia/views/pages/configuration.php

@@ -94,11 +94,12 @@ $categories = get_terms( ['taxonomy' => 'product_cat', 'hide_empty' => false] );
                 </td>
             </tr>
             <tr valign="top">
-                <th scope="row"><?php echo __('Direct API Access', 'miraviawoo')?>
-                <p class="description"><?php echo __('Bypass WeComm proxy and connect directly to Miravia API','miraviawoo')?></p>
+                <th scope="row"><?php echo __('Use Feed API Only', 'miraviawoo')?>
+                <p class="description"><?php echo __('Use official Miravia Feed API for seller accounts (recommended)','miraviawoo')?></p>
                 </th>
                 <td>
                     <input type="checkbox" value="1" name="miravia_direct_api" <?php echo checked($directApi, '1', false)?> />
+                    <p class="description"><strong>Note:</strong> Feed API is the only method available for seller accounts. Individual product APIs require 3rd party app registration.</p>
                 </td>
             </tr>
             <tr valign="top">