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/MiraviaSdk.php

@@ -268,7 +268,7 @@ class MiraviaSdk
     }
 
     /**
-     * Test API connection
+     * Test API connection with different methods
      */
     public function testConnection()
     {
@@ -277,14 +277,24 @@ class MiraviaSdk
         }
 
         try {
-            // Try to get a simple product list to test connection
-            $result = $this->getProductList(['page_size' => 1]);
+            // Try a simpler API method first - get seller info
+            $request = new SimpleIopRequest('aliexpress.seller.info.query');
             
-            if($result !== false && !isset($result->error_response)) {
-                return ['success' => true, 'message' => 'Connection successful'];
-            } else {
-                $error = isset($result->error_response) ? $result->error_response->msg : $this->last_error;
+            if(class_exists('LOG')) {
+                LOG::add("DEBUG SDK: Testing connection with seller info query");
+            }
+
+            $response = $this->client->execute($request, $this->access_token);
+            
+            if(class_exists('LOG')) {
+                LOG::add("DEBUG SDK: Seller info response: " . json_encode($response));
+            }
+            
+            if(isset($response->error_response)) {
+                $error = $response->error_response->msg;
                 return ['success' => false, 'error' => $error];
+            } else {
+                return ['success' => true, 'message' => 'Connection successful'];
             }
             
         } catch (Exception $e) {
@@ -300,6 +310,27 @@ class MiraviaSdk
         return !empty($this->app_key) && !empty($this->secret_key) && !empty($this->access_token);
     }
 
+    /**
+     * Debug token information
+     */
+    public function debugTokenInfo()
+    {
+        $debug_info = [
+            'app_key' => $this->app_key,
+            'has_secret' => !empty($this->secret_key),
+            'has_token' => !empty($this->access_token),
+            'token_length' => strlen($this->access_token),
+            'token_prefix' => substr($this->access_token, 0, 20),
+            'gateway_url' => 'https://api-sg.aliexpress.com/sync'
+        ];
+        
+        if(class_exists('LOG')) {
+            LOG::add("DEBUG SDK: Token info: " . json_encode($debug_info));
+        }
+        
+        return $debug_info;
+    }
+
     /**
      * Convert Miravia product format to AliExpress API format
      */