feat: update product and variant resources to improve variant selection handling and response structure

app/Domains/Catalog/Controllers/ProductController.php

@@ -59,7 +59,7 @@ class ProductController extends Controller
     protected function resolveScopedProduct(Tenant $tenant, Product $product): Product
     {
         if ($product->tenant_codigo !== $tenant->codigo) {
-            throw new NotFoundHttpException('Product not found for tenant.');
+            throw new NotFoundHttpException('Product not found.');
         }
 
         return $product;

app/Domains/Catalog/Resources/ProductResource.php

@@ -34,19 +34,7 @@ class ProductResource extends JsonResource
             'variants' => ProductVariantResource::collection($this->whenLoaded('variants')),
             'variant' => $this->when(
                 $this->getSelectedVariant() !== null,
-                function () {
-                    $selectedVariant = $this->getSelectedVariant();
-
-                    return [
-                        'variant_id' => $selectedVariant->id,
-                        'images' => $selectedVariant->attachments->isNotEmpty()
-                            ? $selectedVariant->attachments->map(fn ($attachment) => $attachment->getTemporaryUrl(1440))->values()
-                            : $this->attachments->map(fn ($attachment) => $attachment->getTemporaryUrl(1440))->values(),
-                        'attributes' => $selectedVariant->definitions->mapWithKeys(function ($definition) {
-                            return [$definition->productAttribute?->attribute?->codigo => $definition->value];
-                        })->toArray(),
-                    ];
-                }
+                fn () => ProductVariantResource::make($this->getSelectedVariant())
             ),
         ];
     }

app/Domains/Catalog/Resources/ProductVariantResource.php

@@ -17,10 +17,17 @@ class ProductVariantResource extends JsonResource
     {
         return [
             'id' => $this->id,
-            'producto_id' => $this->producto_id,
             'stock' => $this->stock,
             'product' => ProductResource::make($this->whenLoaded('product')),
-            'definitions' => ProductVariantDefinitionResource::collection($this->whenLoaded('definitions')),
+            'definitions' => $this->whenLoaded(
+                'definitions',
+                fn () => $this->definitions
+                    ->mapWithKeys(fn ($definition) => [
+                        $definition->productAttribute?->attribute?->codigo => $definition->value,
+                    ])
+                    ->filter(fn ($value, $key) => $key !== null)
+                    ->toArray()
+            ),
             'images' => $this->whenLoaded('attachments', function () {
                 if ($this->attachments->isNotEmpty()) {
                     return $this->attachments

app/Domains/Catalog/Services/ProductService.php

@@ -286,6 +286,7 @@ class ProductService
             'brand',
             'category',
             'attributes.options',
+            'variants.definitions.productAttribute.attribute.options',
         ]);
 
         $selectedVariantQuery = $product->variants()