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/MiraviaCategory.php

@@ -0,0 +1,90 @@
+<?php
+
+require_once dirname(__FILE__) . '/MiraviaLink.php';
+
+class MiraviaCategory extends MiraviaLink
+{
+
+    public function getCategories($treeFormat = false)
+    {
+        $url = $this->api_url . '/category/tree';
+        $ret = $this->CallAPI($url);
+        if($ret === false){
+            return false;
+        }
+        $resp = json_decode($ret, true);
+        if(!isset($resp['success']) || !$resp['success']){
+            $this->last_error = $resp['error'];
+            return false;
+        }
+        if(isset($resp['data'])){
+            if($treeFormat) {
+                return $resp['data'];
+            }else{
+                return $this->treeToList($resp['data']);
+            }
+        }
+        return false;
+    }
+
+    public function getBrands()
+    {
+        $url = $this->api_url . '/category/brands';
+        $ret = $this->CallAPI($url);
+        if($ret === false){
+            return false;
+        }
+        $resp = json_decode($ret, true);
+        if(!isset($resp['success']) || !$resp['success']){
+            $this->last_error = $resp['error'];
+            return false;
+        }
+        if(isset($resp['data'])){
+            return $resp['data'];
+        }
+        return false;
+    }
+
+    public function getAttributes($id)
+    {
+        $url = $this->api_url . '/category/' . $id . '/attributes';
+        $ret = $this->CallAPI($url);
+        if($ret === false){
+            return false;
+        }
+        $resp = json_decode($ret, true);
+        if(!isset($resp['success']) || !$resp['success']){
+            $this->last_error = isset($resp['error']) ? $resp['error'] : $ret;
+            return false;
+        }
+        if(isset($resp['data'])){
+            return $resp['data'];
+        }
+        return false;
+    }
+
+    private function treeToList($tree = [], $prefix = '')
+    {
+        $ret = [];
+        $separator = $prefix=='' ? '' : ' / ';
+        foreach ($tree as $item) {
+            $name = $item['name'];
+            if(isset($item['children'])) {
+                $children = $this->treeToList($item['children'], $prefix . $separator . $name);
+                foreach($children as $key => $child){
+                    $ret[] = [
+                        'id' => $child['id'],
+                        'name' => $child['name']
+                        ];
+                }
+            }else{
+                $ret[] = [
+                    'id' => $item['category_id'],
+                    'name' => $prefix . $separator . $name
+                ];
+            }
+        }
+        return $ret;
+    }
+
+}