feat(i18n): Spanish localization (phase 4)

Complete implementation of Spanish (es-419) language support:
- Canonical catalogs and data: messages/es.json, data/es/**, lib/data/es/**, public/exemplos/es/**
- Canonical slugs: /es/series, /es/catalogo, /es/comparacion, /es/componentes, /es/diagnostico, /es/frameworks, /es/glosario, /es/selector, /es/acerca
- Dedicated search index at /api/busca/es with Spanish accent normalization
- Strict exclusion of book references in Spanish routes and catalogs
- Language selector and root negotiation with es active (ENABLED_LOCALES = ['pt', 'en', 'es'])
- Extended verification suite: check-i18n, smoke-imagem and verifica-vazamentos

Co-Authored-By: Antigravity <noreply@google.com>

components/PageHero.jsx

@@ -14,6 +14,7 @@ export default function PageHero({
 	align = "left",
 	children,
 	isEn: isEnProp,
+	isEs: isEsProp,
 	locale: localeProp,
 }) {
 	const center = align === "center";
@@ -23,13 +24,19 @@ export default function PageHero({
 			: localeProp
 			? localeProp === "en"
 			: trail.some((t) => t.isEn || (t.href && t.href.startsWith("/en")));
+	const isEs =
+		isEsProp !== undefined
+			? isEsProp
+			: localeProp
+			? localeProp === "es"
+			: trail.some((t) => t.isEs || (t.href && t.href.startsWith("/es")));
 
 	return (
 		<section className="shell pt-8 sm:pt-12">
 			{trail.length > 0 && (
-				<nav aria-label={isEn ? "Breadcrumb navigation" : "Trilha de navegação"} className="flex flex-wrap items-center gap-2 text-sm text-muted">
-					<Link href={isEn ? "/en" : "/"} className="inline-flex min-h-11 min-w-11 items-center justify-center transition-colors hover:text-accent">
-						{isEn ? "Home" : "Início"}
+				<nav aria-label={isEn ? "Breadcrumb navigation" : isEs ? "Navegación por migas de pan" : "Trilha de navegação"} className="flex flex-wrap items-center gap-2 text-sm text-muted">
+					<Link href={isEn ? "/en" : isEs ? "/es" : "/"} className="inline-flex min-h-11 min-w-11 items-center justify-center transition-colors hover:text-accent">
+						{isEn ? "Home" : isEs ? "Inicio" : "Início"}
 					</Link>
 					{trail.map((item, i) => (
 						<span key={item.label} className="flex min-h-11 items-center gap-2">