Merge fix/adr0006-etapa2-fase3b-count-limit0-bug into main

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

@@ -250,7 +250,17 @@ export function CatalogClient({
       const response = await fetch(`/api/search?${buildParams(omit).toString()}`, {
         signal: controller.signal,
       });
-      return (await response.json()) as { facetDistribution?: FacetDistribution; count?: number };
+      return (await response.json()) as { facetDistribution?: FacetDistribution };
+    }
+
+    // El "count"/estimatedTotalHits que devuelve /api/search viene en 0 con
+    // limit=0 (confirmado en vivo contra Meilisearch real -- limit>=1 lo
+    // reporta bien, limit=0 no). facetDistribution si es correcto con
+    // limit=0, y cada producto tiene siempre un valor para cada dimension
+    // (mapProduct usa defaults como "ARI Shopping"/"Todas", nunca null), asi
+    // que sumar sus valores da el total real sin depender de ese campo.
+    function sumFacetValues(facet: Record<string, number> | null): number {
+      return facet ? Object.values(facet).reduce((sum, value) => sum + value, 0) : 0;
     }
 
     const timer = setTimeout(() => {
@@ -265,11 +275,11 @@ export function CatalogClient({
           const ageFacet = ageRes.facetDistribution && "ageRange" in ageRes.facetDistribution ? ageRes.facetDistribution.ageRange : null;
           setLiveFacets({
             category: categoryFacet,
-            categoryTotal: categoryFacet ? (categoryRes.count ?? 0) : null,
+            categoryTotal: categoryFacet ? sumFacetValues(categoryFacet) : null,
             brand: categoryIsLeafOrNone ? brandFacet : null,
-            brandTotal: categoryIsLeafOrNone && brandFacet ? (brandRes.count ?? 0) : null,
+            brandTotal: categoryIsLeafOrNone && brandFacet ? sumFacetValues(brandFacet) : null,
             ageRange: categoryIsLeafOrNone ? ageFacet : null,
-            ageTotal: categoryIsLeafOrNone && ageFacet ? (ageRes.count ?? 0) : null,
+            ageTotal: categoryIsLeafOrNone && ageFacet ? sumFacetValues(ageFacet) : null,
           });
         })
         .catch((error) => {