fix(ecommerce): corregir error de tipos en indice de tile promocional

tsconfig tiene noUncheckedIndexedAccess -- promoRoots[promoIndex %
promoRoots.length] tipa como Category | undefined aunque en runtime
siempre es valido (promoRoots.length > 0 ya se verifico antes de este
punto). Extraido a una constante con guard explicito para que TS
angoste el tipo. Sin cambio de comportamiento.

Detectado por el build real en main tras el merge de #41 -- no se
puede correr tsc localmente en esta maquina (ver notas de sesiones
anteriores), asi que esto solo lo valida el CI post-merge.

workloads/ecommerce/components/catalog/catalog-client.tsx

@@ -3,11 +3,19 @@
 import Link from "next/link";
 import { ChevronRight, SlidersHorizontal, X } from "lucide-react";
 import { useEffect, useMemo, useState } from "react";
+import { PromoTile } from "@/components/home/category-tiles";
 import { ProductCard } from "@/components/product/product-card";
 import { Button } from "@/components/ui/button";
 import { Input } from "@/components/ui/input";
 import type { Category, Product } from "@/lib/headless/types";
 
+// Cada cuantas tarjetas de producto se intercala un tile promocional en
+// la grilla (patron Walmart, ADR 0005 seccion 3): grid con tiles
+// promocionales intercalados, no solo tarjetas homogeneas.
+const PROMO_TILE_INTERVAL = 8;
+
+type GridItem = { type: "product"; product: Product } | { type: "promo"; category: Category };
+
 type CatalogClientProps = {
   products: Product[];
   categories?: Category[];
@@ -96,6 +104,11 @@ export function CatalogClient({
   // trata como el nombre de categoria exacto de siempre.
   const allowedCategories = categoryGroups[category] ?? [category];
   const breadcrumb = useMemo(() => (category === "Todos" ? [] : buildBreadcrumb(categoryNodes, category)), [categoryNodes, category]);
+  // No promociona la misma categoria raiz que el usuario ya esta viendo.
+  const promoRoots = useMemo(() => {
+    const excludeRootId = breadcrumb[0]?.id;
+    return categoryNodes.filter((node) => !node.parentId && node.id !== excludeRootId);
+  }, [categoryNodes, breadcrumb]);
 
   const filtered = useMemo(
     () =>
@@ -119,6 +132,27 @@ export function CatalogClient({
     [age, allowedCategories, brand, category, collection, maxPrice, products, query, sort],
   );
 
+  // Intercala un tile promocional cada PROMO_TILE_INTERVAL productos,
+  // ciclando por las categorias raiz -- si no hay jerarquia de
+  // categorias disponible, la grilla queda igual que antes (solo
+  // productos).
+  const gridItems = useMemo<GridItem[]>(() => {
+    if (promoRoots.length === 0) return filtered.map((product) => ({ type: "product", product }));
+
+    const items: GridItem[] = [];
+    let promoIndex = 0;
+    filtered.forEach((product, index) => {
+      items.push({ type: "product", product });
+      const isLast = index === filtered.length - 1;
+      const promoCategory = promoRoots[promoIndex % promoRoots.length];
+      if (!isLast && (index + 1) % PROMO_TILE_INTERVAL === 0 && promoCategory) {
+        items.push({ type: "promo", category: promoCategory });
+        promoIndex += 1;
+      }
+    });
+    return items;
+  }, [filtered, promoRoots]);
+
   // Conteos por valor de filtro (patron Amazon: "Marca (12)"), calculados
   // sobre los productos que ya pasan el resto de filtros activos -- cada
   // dimension se cuenta excluyendose a si misma para reflejar cuantos
@@ -284,9 +318,13 @@ export function CatalogClient({
 
           {filtered.length ? (
             <div className="grid gap-5 sm:grid-cols-2 xl:grid-cols-3">
-              {filtered.map((product) => (
-                <ProductCard key={product.id} product={product} />
-              ))}
+              {gridItems.map((item, index) =>
+                item.type === "product" ? (
+                  <ProductCard key={item.product.id} product={item.product} />
+                ) : (
+                  <PromoTile key={`promo-${index}`} category={item.category} className="min-h-[22rem]" />
+                ),
+              )}
             </div>
           ) : (
             <div className="grid min-h-80 place-items-center rounded-3xl border border-dashed border-slate-300 text-center">

workloads/ecommerce/components/home/category-tiles.tsx

@@ -2,6 +2,7 @@ import Image from "next/image";
 import Link from "next/link";
 import { ArrowUpRight } from "lucide-react";
 import type { Category } from "@/lib/headless/types";
+import { cn } from "@/lib/utils";
 
 type TileContent = { subtitle: string; image?: string; color: string };
 
@@ -20,6 +21,37 @@ const tileContent: Record<string, TileContent> = {
 
 const defaultTile: TileContent = { subtitle: "Explora esta categoría", color: "from-slate-400 to-slate-600" };
 
+// Tile individual reutilizado tanto por la seccion de mundos del home
+// como por el grid del catalogo (tiles promocionales intercalados,
+// ADR 0005 seccion 3, patron Walmart) -- mismo primitivo visual, no un
+// componente nuevo.
+export function PromoTile({ category, className = "" }: { category: Category; className?: string }) {
+  const content = tileContent[category.handle] ?? defaultTile;
+
+  return (
+    <Link
+      href={`/catalog?category=${encodeURIComponent(category.name)}`}
+      className={cn(`group relative min-h-64 overflow-hidden rounded-[2rem] bg-gradient-to-br ${content.color} shadow-xl`, className)}
+    >
+      {content.image && (
+        <>
+          <Image src={content.image} alt={category.name} fill sizes="(max-width: 640px) 100vw, (max-width: 1024px) 33vw, 16vw" className="object-cover transition duration-500 group-hover:scale-105" />
+          <div className="absolute inset-0 bg-gradient-to-t from-slate-950/80 via-transparent to-white/5" />
+        </>
+      )}
+      <div className="absolute inset-x-0 bottom-0 flex items-end justify-between p-6 text-white">
+        <div>
+          <h3 className="text-xl font-black">{category.name}</h3>
+          <p className="mt-1 text-sm font-semibold text-white/80">{content.subtitle}</p>
+        </div>
+        <span className="grid size-11 shrink-0 place-items-center rounded-full bg-white text-slate-950 transition group-hover:rotate-45">
+          <ArrowUpRight />
+        </span>
+      </div>
+    </Link>
+  );
+}
+
 export function CategoryTiles({ categories }: { categories: Category[] }) {
   const roots = categories.filter((category) => !category.parentId);
 
@@ -35,33 +67,9 @@ export function CategoryTiles({ categories }: { categories: Category[] }) {
         <Link href="/catalog" className="hidden font-black text-cyan-700 sm:block">Ver todo →</Link>
       </div>
       <div className="grid gap-5 sm:grid-cols-2 lg:grid-cols-3 xl:grid-cols-6">
-        {roots.map((category) => {
-          const content = tileContent[category.handle] ?? defaultTile;
-
-          return (
-            <Link
-              key={category.id}
-              href={`/catalog?category=${encodeURIComponent(category.name)}`}
-              className={`group relative min-h-64 overflow-hidden rounded-[2rem] bg-gradient-to-br ${content.color} shadow-xl`}
-            >
-              {content.image && (
-                <>
-                  <Image src={content.image} alt={category.name} fill sizes="(max-width: 640px) 100vw, (max-width: 1024px) 33vw, 16vw" className="object-cover transition duration-500 group-hover:scale-105" />
-                  <div className="absolute inset-0 bg-gradient-to-t from-slate-950/80 via-transparent to-white/5" />
-                </>
-              )}
-              <div className="absolute inset-x-0 bottom-0 flex items-end justify-between p-6 text-white">
-                <div>
-                  <h3 className="text-xl font-black">{category.name}</h3>
-                  <p className="mt-1 text-sm font-semibold text-white/80">{content.subtitle}</p>
-                </div>
-                <span className="grid size-11 shrink-0 place-items-center rounded-full bg-white text-slate-950 transition group-hover:rotate-45">
-                  <ArrowUpRight />
-                </span>
-              </div>
-            </Link>
-          );
-        })}
+        {roots.map((category) => (
+          <PromoTile key={category.id} category={category} />
+        ))}
       </div>
     </section>
   );

workloads/ecommerce/components/product/product-card.tsx

@@ -2,12 +2,12 @@
 
 import Image from "next/image";
 import Link from "next/link";
-import { Heart, ShoppingBag, Sparkles } from "lucide-react";
+import { Heart, ShoppingBag, Sparkles, TriangleAlert } from "lucide-react";
 import { useState } from "react";
 import { Badge } from "@/components/ui/badge";
 import { Button } from "@/components/ui/button";
 import type { Product } from "@/lib/headless/types";
-import { formatMoney } from "@/lib/utils";
+import { formatMoney, LOW_STOCK_THRESHOLD } from "@/lib/utils";
 import { useCartStore } from "@/store/cart-store";
 import { useWishlistStore } from "@/store/wishlist-store";
 
@@ -23,6 +23,14 @@ export function ProductCard({ product, priority = false }: { product: Product; p
       : null;
 
   const [selectedVariantId, setSelectedVariantId] = useState(product.variants[0]?.id);
+  const selectedVariant = product.variants.find((variant) => variant.id === selectedVariantId) ?? product.variants[0];
+  const lowStock =
+    selectedVariant?.inventoryQuantity !== null &&
+    selectedVariant?.inventoryQuantity !== undefined &&
+    selectedVariant.inventoryQuantity > 0 &&
+    selectedVariant.inventoryQuantity <= LOW_STOCK_THRESHOLD
+      ? selectedVariant.inventoryQuantity
+      : null;
 
   return (
     <article className="group flex h-full flex-col overflow-hidden rounded-3xl border border-slate-100 bg-white shadow-lg shadow-slate-900/5 transition duration-300 hover:-translate-y-1.5 hover:shadow-2xl hover:shadow-violet-500/10">
@@ -56,6 +64,9 @@ export function ProductCard({ product, priority = false }: { product: Product; p
             ))}
           </div>
         )}
+        {lowStock !== null && (
+          <span className="flex items-center gap-1.5 text-xs font-bold text-amber-600"><TriangleAlert className="size-3.5" />Quedan {lowStock}</span>
+        )}
         <div className="mt-auto flex items-center justify-between gap-3 pt-1">
           <div className="flex flex-col">
             {product.compareAtPrice && <span className="text-xs font-bold text-slate-400 line-through">{formatMoney(product.compareAtPrice, product.currency)}</span>}

workloads/ecommerce/components/product/product-purchase.tsx

@@ -1,14 +1,22 @@
 "use client";
 
-import { CheckCircle2, ShoppingBag, Truck } from "lucide-react";
+import { CheckCircle2, ShoppingBag, TriangleAlert, Truck } from "lucide-react";
 import { useState } from "react";
 import { Button } from "@/components/ui/button";
 import type { Product } from "@/lib/headless/types";
-import { formatMoney } from "@/lib/utils";
+import { formatMoney, LOW_STOCK_THRESHOLD } from "@/lib/utils";
 import { useCartStore } from "@/store/cart-store";
 
 export function ProductPurchase({ product }: { product: Product }) {
   const [variantId, setVariantId] = useState(product.variants[0]?.id);
   const addItem = useCartStore((state) => state.addItem);
-  return <div><div className="mb-5 flex flex-wrap gap-2">{product.variants.map((variant) => <button key={variant.id} onClick={() => setVariantId(variant.id)} className={`rounded-full border px-4 py-2 text-sm font-bold ${variantId === variant.id ? "border-fuchsia-500 bg-fuchsia-50 text-fuchsia-700" : "border-slate-200"}`}>{variant.value}</button>)}</div><div className="mb-6 flex items-end gap-3"><strong className="text-3xl font-black">{formatMoney(product.price, product.currency)}</strong>{product.compareAtPrice && <del className="text-slate-400">{formatMoney(product.compareAtPrice, product.currency)}</del>}</div><Button variant="magenta" size="lg" className="w-full" onClick={() => addItem(product, variantId)}><ShoppingBag />Añadir al carrito</Button><div className="mt-5 grid gap-3 rounded-2xl bg-slate-50 p-4 text-sm"><span className="flex items-center gap-2 font-bold"><CheckCircle2 className="size-4 text-emerald-500" />Disponibilidad por confirmar</span><span className="flex items-center gap-2 font-bold"><Truck className="size-4 text-cyan-600" />Envíos nacionales</span></div></div>;
+  const selectedVariant = product.variants.find((variant) => variant.id === variantId) ?? product.variants[0];
+  const lowStock =
+    selectedVariant?.inventoryQuantity !== null &&
+    selectedVariant?.inventoryQuantity !== undefined &&
+    selectedVariant.inventoryQuantity > 0 &&
+    selectedVariant.inventoryQuantity <= LOW_STOCK_THRESHOLD
+      ? selectedVariant.inventoryQuantity
+      : null;
+  return <div><div className="mb-5 flex flex-wrap gap-2">{product.variants.map((variant) => <button key={variant.id} onClick={() => setVariantId(variant.id)} className={`rounded-full border px-4 py-2 text-sm font-bold ${variantId === variant.id ? "border-fuchsia-500 bg-fuchsia-50 text-fuchsia-700" : "border-slate-200"}`}>{variant.value}</button>)}</div><div className="mb-6 flex items-end gap-3"><strong className="text-3xl font-black">{formatMoney(product.price, product.currency)}</strong>{product.compareAtPrice && <del className="text-slate-400">{formatMoney(product.compareAtPrice, product.currency)}</del>}</div><Button variant="magenta" size="lg" className="w-full" onClick={() => addItem(product, variantId)}><ShoppingBag />Añadir al carrito</Button><div className="mt-5 grid gap-3 rounded-2xl bg-slate-50 p-4 text-sm">{lowStock !== null ? <span className="flex items-center gap-2 font-bold text-amber-600"><TriangleAlert className="size-4" />Quedan {lowStock} unidades</span> : <span className="flex items-center gap-2 font-bold"><CheckCircle2 className="size-4 text-emerald-500" />Disponibilidad por confirmar</span>}<span className="flex items-center gap-2 font-bold"><Truck className="size-4 text-cyan-600" />Envíos nacionales</span></div></div>;
 }

workloads/ecommerce/data/products.json

@@ -30,7 +30,8 @@
         "id": "ari-001-toy-story-5-rex-default",
         "name": "Presentación",
         "value": "Edición original",
-        "available": true
+        "available": true,
+        "inventoryQuantity": null
       }
     ],
     "thumbnail": "/images/thumbnails/ari-001-toy-story-5-rex.webp"
@@ -66,7 +67,8 @@
         "id": "ari-002-toy-story-5-buzz-lightyear-default",
         "name": "Presentación",
         "value": "Edición original",
-        "available": true
+        "available": true,
+        "inventoryQuantity": null
       }
     ],
     "thumbnail": "/images/thumbnails/ari-002-toy-story-5-buzz-lightyear.webp"
@@ -102,7 +104,8 @@
         "id": "ari-003-toy-story-5-jessie-default",
         "name": "Presentación",
         "value": "Edición original",
-        "available": true
+        "available": true,
+        "inventoryQuantity": null
       }
     ],
     "thumbnail": "/images/thumbnails/ari-003-toy-story-5-jessie.webp"
@@ -138,7 +141,8 @@
         "id": "ari-004-toy-story-5-woody-default",
         "name": "Presentación",
         "value": "Edición original",
-        "available": true
+        "available": true,
+        "inventoryQuantity": null
       }
     ],
     "thumbnail": "/images/thumbnails/ari-004-toy-story-5-woody.webp"
@@ -174,7 +178,8 @@
         "id": "ari-005-intensamente-furia-default",
         "name": "Presentación",
         "value": "Edición original",
-        "available": true
+        "available": true,
+        "inventoryQuantity": null
       }
     ],
     "thumbnail": "/images/thumbnails/ari-005-intensamente-furia.webp"
@@ -210,7 +215,8 @@
         "id": "ari-006-intensamente-tristeza-default",
         "name": "Presentación",
         "value": "Edición original",
-        "available": true
+        "available": true,
+        "inventoryQuantity": null
       }
     ],
     "thumbnail": "/images/thumbnails/ari-006-intensamente-tristeza.webp"
@@ -246,7 +252,8 @@
         "id": "ari-007-minnie-y-mickey-mouse-default",
         "name": "Presentación",
         "value": "Edición original",
-        "available": true
+        "available": true,
+        "inventoryQuantity": null
       }
     ],
     "thumbnail": "/images/thumbnails/ari-007-minnie-y-mickey-mouse.webp"
@@ -282,7 +289,8 @@
         "id": "ari-008-angel-lilo-y-stitch-default",
         "name": "Presentación",
         "value": "Edición original",
-        "available": true
+        "available": true,
+        "inventoryQuantity": null
       }
     ],
     "thumbnail": "/images/thumbnails/ari-008-angel-lilo-y-stitch.webp"
@@ -318,7 +326,8 @@
         "id": "ari-009-mochilas-disney-coleccion-marvel-default",
         "name": "Presentación",
         "value": "Rosa",
-        "available": true
+        "available": true,
+        "inventoryQuantity": null
       }
     ],
     "thumbnail": "/images/thumbnails/ari-009-mochilas-disney-coleccion-marvel.webp"
@@ -354,7 +363,8 @@
         "id": "ari-010-mochila-ligera-y-resistente-al-agua-de-d-default",
         "name": "Presentación",
         "value": "Rosa",
-        "available": true
+        "available": true,
+        "inventoryQuantity": null
       }
     ],
     "thumbnail": "/images/thumbnails/ari-010-mochila-ligera-y-resistente-al-agua-de-d.webp"
@@ -390,7 +400,8 @@
         "id": "ari-011-mochila-escolar-de-spider-man-de-disney--default",
         "name": "Presentación",
         "value": "Rosa",
-        "available": true
+        "available": true,
+        "inventoryQuantity": null
       }
     ],
     "thumbnail": "/images/thumbnails/ari-011-mochila-escolar-de-spider-man-de-disney-.webp"
@@ -426,7 +437,8 @@
         "id": "ari-012-disney-mochila-de-poliester-ultraligera--default",
         "name": "Presentación",
         "value": "Rosa",
-        "available": true
+        "available": true,
+        "inventoryQuantity": null
       }
     ],
     "thumbnail": "/images/thumbnails/ari-012-disney-mochila-de-poliester-ultraligera-.webp"
@@ -462,7 +474,8 @@
         "id": "ari-013-mochila-pequena-bob-esponja-default",
         "name": "Presentación",
         "value": "Rosa",
-        "available": true
+        "available": true,
+        "inventoryQuantity": null
       }
     ],
     "thumbnail": "/images/thumbnails/ari-013-mochila-pequena-bob-esponja.webp"
@@ -498,7 +511,8 @@
         "id": "ari-014-mochila-casual-de-gran-capacidad-con-est-default",
         "name": "Presentación",
         "value": "Rosa",
-        "available": true
+        "available": true,
+        "inventoryQuantity": null
       }
     ],
     "thumbnail": "/images/thumbnails/ari-014-mochila-casual-de-gran-capacidad-con-est.webp"
@@ -534,7 +548,8 @@
         "id": "ari-015-mochila-escolar-estilo-britanico-de-disn-default",
         "name": "Presentación",
         "value": "Rosa",
-        "available": true
+        "available": true,
+        "inventoryQuantity": null
       }
     ],
     "thumbnail": "/images/thumbnails/ari-015-mochila-escolar-estilo-britanico-de-disn.webp"
@@ -570,7 +585,8 @@
         "id": "ari-016-disney-mochila-iron-man-de-poliester-ult-default",
         "name": "Presentación",
         "value": "Rosa",
-        "available": true
+        "available": true,
+        "inventoryQuantity": null
       }
     ],
     "thumbnail": "/images/thumbnails/ari-016-disney-mochila-iron-man-de-poliester-ult.webp"
@@ -606,7 +622,8 @@
         "id": "ari-017-mochila-de-disney-marvel-capitan-america-default",
         "name": "Presentación",
         "value": "Rosa",
-        "available": true
+        "available": true,
+        "inventoryQuantity": null
       }
     ],
     "thumbnail": "/images/thumbnails/ari-017-mochila-de-disney-marvel-capitan-america.webp"

workloads/ecommerce/frontend/patches/deployment.yaml

@@ -25,7 +25,7 @@ spec:
         runAsUser: 1001
       containers:
         - name: app
-          image: gitea.cruzcloud.net/devops/ecommerce-frontend:v1.0.147
+          image: gitea.cruzcloud.net/devops/ecommerce-frontend:v1.0.154
           env:
             - name: HEADLESS_PROVIDER
               value: medusa

workloads/ecommerce/lib/headless/providers/medusa.ts

@@ -157,11 +157,19 @@ function mapVariant(variant: MedusaVariant): ProductVariant {
     variant.manage_inventory === false ||
     (variant.inventory_quantity ?? 0) > 0;
 
+  // null = inventario no gestionado (backorder o manage_inventory=false),
+  // no hay un numero real que mostrar como "quedan N".
+  const inventoryQuantity =
+    variant.allow_backorder === true || variant.manage_inventory === false
+      ? null
+      : (variant.inventory_quantity ?? 0);
+
   return {
     id: variant.id,
     name: option?.option?.title || "Presentación",
     value: option?.value || variant.title || "Estándar",
     available,
+    inventoryQuantity,
   };
 }
 

workloads/ecommerce/lib/headless/types.ts

@@ -3,6 +3,7 @@ export interface ProductVariant {
   name: string;
   value: string;
   available: boolean;
+  inventoryQuantity: number | null;
 }
 
 export interface Product {

workloads/ecommerce/lib/utils.ts

@@ -13,3 +13,8 @@ export function formatMoney(value: number | null, currency = "COP"): string {
     maximumFractionDigits: 0,
   }).format(value);
 }
+
+// Umbral desde el cual mostramos "Quedan N" en vez de solo "Disponible".
+// inventoryQuantity=null significa inventario no gestionado (backorder /
+// manage_inventory=false en Medusa) -- ahi nunca mostramos el mensaje.
+export const LOW_STOCK_THRESHOLD = 5;