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/classes/shared/MiraviaCombination.php

@@ -0,0 +1,59 @@
+<?php
+
+class MiraviaCombination
+{
+
+    public $sku = '';
+    public $ean_code = '';
+    public $price = 0;
+    public $special_price = 0;
+    public $quantity = 0;
+    public $images = [];
+    public $width = 0;
+    public $height = 0;
+    public $length = 0;
+    public $weight = 0;
+    public $variation = [];
+
+    public function addVariation($name, $value)
+    {
+        $this->variation[$name] = $value;
+    }
+
+    public function getData()
+    {
+        $combination = [];
+        $this->weight = round((float)$this->weight, 2);
+        foreach ($this as $key => $value){
+            if($key=='ean_code' && empty($value)){
+                continue;
+            }
+            if($key === 'images' && is_array($value) && !empty($value)){
+                $combination['Images'] = ['Image' => $value];
+            } else if($key !== 'images') {
+                $combination[$key] = $value;
+            }
+        }
+        return $combination;
+    }
+
+    public function getStockData()
+    {
+        $combination = [
+            'sku' => $this->sku,
+            'price' => $this->price,
+            'special_price' => $this->special_price,
+            'quantity' => $this->quantity >= 0 ? $this->quantity : 0
+        ];
+        return $combination;
+    }
+
+    public function getOnlyStockData()
+    {
+        $combination = [
+            'sku' => $this->sku,
+            'quantity' => $this->quantity >= 0 ? $this->quantity : 0
+        ];
+        return $combination;
+    }
+}