feat(catalog): model availability as global decisions

app/Domains/Catalog/Services/VariantSelectionService.php

@@ -10,6 +10,10 @@ use Illuminate\Support\Collection;
 
 class VariantSelectionService
 {
+    public function __construct(
+        private readonly CatalogItemAllowanceService $allowances,
+    ) {}
+
     /**
      * @param  array<string, mixed>  $selectedValues
      * @return array<string, mixed>
@@ -188,13 +192,17 @@ class VariantSelectionService
     /** @return array<string, mixed> */
     private function variantData(CatalogItem $catalogItem, Variant $variant): array
     {
+        $availableStock = $catalogItem->inventory_policy === InventoryPolicy::Unlimited
+            ? null
+            : $variant->inventory?->availableStock();
+
         return [
             'id' => $variant->id,
             'descripcion' => $variant->getDescription(),
             'precio' => number_format($variant->getPrice(), 2, '.', ''),
-            'stock_tecnico' => $catalogItem->inventory_policy === InventoryPolicy::Unlimited
-                ? null
-                : $variant->inventory?->availableStock(),
+            'availability' => $this->allowances
+                ->availability($availableStock, null)
+                ->toArray(),
             'values' => $variant->selectorOptions($catalogItem->itemAttributes),
         ];
     }