ver. 0.302: REST API product variants, attributes dictionary, attribute filtering

- Add variant CRUD endpoints (variants, create_variant, update_variant, delete_variant)
- Add dictionaries/attributes endpoint with multilingual names and values
- Add attribute_* filter params for product list filtering by attribute values
- Enrich product detail attributes with translated names (attribute_names, value_names)
- Include variants array in product detail response for parent products
- Add price_brutto validation on product create
- Batch-load attribute/value translations (4 queries instead of N+1)
- Add 43 new unit tests (730 total, 2066 assertions)

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

tests/Unit/api/Controllers/DictionariesApiControllerTest.php

@@ -3,6 +3,7 @@ namespace Tests\Unit\api\Controllers;
 
 use PHPUnit\Framework\TestCase;
 use api\Controllers\DictionariesApiController;
+use Domain\Attribute\AttributeRepository;
 use Domain\ShopStatus\ShopStatusRepository;
 use Domain\Transport\TransportRepository;
 use Domain\PaymentMethod\PaymentMethodRepository;
@@ -12,6 +13,7 @@ class DictionariesApiControllerTest extends TestCase
     private $mockStatusRepo;
     private $mockTransportRepo;
     private $mockPaymentRepo;
+    private $mockAttrRepo;
     private $controller;
 
     protected function setUp(): void
@@ -19,11 +21,13 @@ class DictionariesApiControllerTest extends TestCase
         $this->mockStatusRepo = $this->createMock(ShopStatusRepository::class);
         $this->mockTransportRepo = $this->createMock(TransportRepository::class);
         $this->mockPaymentRepo = $this->createMock(PaymentMethodRepository::class);
+        $this->mockAttrRepo = $this->createMock(AttributeRepository::class);
 
         $this->controller = new DictionariesApiController(
             $this->mockStatusRepo,
             $this->mockTransportRepo,
-            $this->mockPaymentRepo
+            $this->mockPaymentRepo,
+            $this->mockAttrRepo
         );
 
         $_SERVER['REQUEST_METHOD'] = 'GET';
@@ -136,4 +140,50 @@ class DictionariesApiControllerTest extends TestCase
 
         $this->assertSame(405, http_response_code());
     }
+
+    // --- attributes ---
+
+    public function testAttributesReturnsFormattedList(): void
+    {
+        $this->mockAttrRepo->method('listForApi')
+            ->willReturn([
+                [
+                    'id' => 5,
+                    'type' => 0,
+                    'status' => 1,
+                    'names' => ['pl' => 'Rozmiar', 'en' => 'Size'],
+                    'values' => [
+                        [
+                            'id' => 12,
+                            'names' => ['pl' => 'M', 'en' => 'M'],
+                            'is_default' => 1,
+                            'impact_on_the_price' => null,
+                        ],
+                    ],
+                ],
+            ]);
+
+        ob_start();
+        $this->controller->attributes();
+        $output = ob_get_clean();
+
+        $json = json_decode($output, true);
+        $this->assertSame('ok', $json['status']);
+        $this->assertCount(1, $json['data']);
+        $this->assertSame(5, $json['data'][0]['id']);
+        $this->assertSame('Rozmiar', $json['data'][0]['names']['pl']);
+        $this->assertCount(1, $json['data'][0]['values']);
+        $this->assertSame(12, $json['data'][0]['values'][0]['id']);
+    }
+
+    public function testAttributesRejectsPostMethod(): void
+    {
+        $_SERVER['REQUEST_METHOD'] = 'POST';
+
+        ob_start();
+        $this->controller->attributes();
+        $output = ob_get_clean();
+
+        $this->assertSame(405, http_response_code());
+    }
 }