ver. 0.318: shopPRO export produktów + nowe API endpoints

- NEW: IntegrationsRepository::shopproExportProduct() — eksport produktu do
  zdalnej instancji shopPRO (pola główne, tłumaczenia, custom fields, zdjęcia)
- NEW: sendImageToShopproApi() — wysyłka zdjęć przez API shopPRO (base64 POST)
- REFACTOR: shopproImportProduct() — wydzielono shopproDb() i
  missingShopproSetting(); dodano security_information, producer_id,
  custom fields, alt zdjęcia
- NEW: AttributeRepository::ensureAttributeForApi() i
  ensureAttributeValueForApi() — idempotent find-or-create dla słowników
- NEW: API POST dictionaries/ensure_attribute — utwórz lub znajdź atrybut
- NEW: API POST dictionaries/ensure_attribute_value — utwórz lub znajdź wartość
- NEW: API POST products/upload_image — przyjmuje base64, zapisuje plik i DB
- NEW: IntegrationsController::shoppro_product_export() — akcja admina
- NEW: przycisk "Eksportuj do shopPRO" w liście produktów
- NEW: pole API key w ustawieniach integracji shopPRO

Tests: 765 tests, 2153 assertions — all green

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

tests/Unit/Domain/Integrations/IntegrationsRepositoryTest.php

@@ -229,7 +229,7 @@ class IntegrationsRepositoryTest extends TestCase
             'linkProduct', 'unlinkProduct',
             'apiloAuthorize', 'apiloGetAccessToken', 'apiloKeepalive', 'apiloIntegrationStatus',
             'apiloFetchList', 'apiloFetchListResult', 'apiloProductSearch', 'apiloCreateProduct',
-            'getProductSku', 'shopproImportProduct',
+            'getProductSku', 'shopproImportProduct', 'shopproExportProduct',
         ];
 
         foreach ($expectedMethods as $method) {

tests/Unit/admin/Controllers/IntegrationsControllerTest.php

@@ -118,6 +118,7 @@ class IntegrationsControllerTest extends TestCase
             'shoppro_settings',
             'shoppro_settings_save',
             'shoppro_product_import',
+            'shoppro_product_export',
         ];
 
         foreach ($methods as $method) {
@@ -157,6 +158,7 @@ class IntegrationsControllerTest extends TestCase
             'apilo_product_select_delete',
             'shoppro_settings_save',
             'shoppro_product_import',
+            'shoppro_product_export',
         ];
 
         foreach ($voidMethods as $method) {

tests/Unit/api/Controllers/DictionariesApiControllerTest.php

@@ -186,4 +186,52 @@ class DictionariesApiControllerTest extends TestCase
 
         $this->assertSame(405, http_response_code());
     }
+
+    public function testEnsureAttributeRejectsGetMethod(): void
+    {
+        $_SERVER['REQUEST_METHOD'] = 'GET';
+
+        ob_start();
+        $this->controller->ensure_attribute();
+        ob_get_clean();
+
+        $this->assertSame(405, http_response_code());
+    }
+
+    public function testEnsureAttributeReturns400WhenNoBody(): void
+    {
+        $_SERVER['REQUEST_METHOD'] = 'POST';
+
+        ob_start();
+        $this->controller->ensure_attribute();
+        $output = ob_get_clean();
+
+        $this->assertSame(400, http_response_code());
+        $json = json_decode($output, true);
+        $this->assertSame('BAD_REQUEST', $json['code']);
+    }
+
+    public function testEnsureAttributeValueRejectsGetMethod(): void
+    {
+        $_SERVER['REQUEST_METHOD'] = 'GET';
+
+        ob_start();
+        $this->controller->ensure_attribute_value();
+        ob_get_clean();
+
+        $this->assertSame(405, http_response_code());
+    }
+
+    public function testEnsureAttributeValueReturns400WhenNoBody(): void
+    {
+        $_SERVER['REQUEST_METHOD'] = 'POST';
+
+        ob_start();
+        $this->controller->ensure_attribute_value();
+        $output = ob_get_clean();
+
+        $this->assertSame(400, http_response_code());
+        $json = json_decode($output, true);
+        $this->assertSame('BAD_REQUEST', $json['code']);
+    }
 }

tests/Unit/api/Controllers/ProductsApiControllerTest.php

@@ -351,6 +351,19 @@ class ProductsApiControllerTest extends TestCase
         $this->assertSame('5901234123457', $result['ean']);
     }
 
+    public function testMapApiToFormDataPreservesZeroBasePriceForSaveProduct(): void
+    {
+        $method = new \ReflectionMethod(ProductsApiController::class, 'mapApiToFormData');
+        $method->setAccessible(true);
+
+        $result = $method->invoke($this->controller, [
+            'price_brutto' => 0.0,
+            'languages' => ['pl' => ['name' => 'Zero']],
+        ]);
+
+        $this->assertSame('0', $result['price_brutto']);
+    }
+
     public function testMapApiToFormDataMapsCategories(): void
     {
         $method = new \ReflectionMethod(ProductsApiController::class, 'mapApiToFormData');