fix(i18n): eliminate portuguese text leaks across english routes

- Localize skip-to-content accessibility link and breadcrumb navigation
- Convert section layouts to dynamic generateMetadata with English titles, descriptions, and structured data
- Eliminate mixed language expressions and translate remaining SoC connection pin warnings and descriptions
- Translate component registry items, categories, tags, and IDF Component Manager guide
- Add strict identical string verification to scripts/check-i18n.mjs with technical allowlist

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

components/PageHero.jsx

@@ -1,4 +1,5 @@
 import Link from "next/link";
+import { useLocale } from "next-intl";
 
 /**
  * Abertura padrão das páginas internas: trilha, rótulo, título, frase de apoio
@@ -7,12 +8,20 @@ import Link from "next/link";
  */
 export default function PageHero({ trail = [], icon: Icon, label, title, lede, align = "left", children }) {
 	const center = align === "center";
+	let isEn = false;
+	try {
+		const locale = useLocale();
+		isEn = locale === "en";
+	} catch {
+		// fallback
+	}
+
 	return (
 		<section className="shell pt-8 sm:pt-12">
 			{trail.length > 0 && (
-				<nav aria-label="Trilha de navegação" className="flex flex-wrap items-center gap-2 text-sm text-muted">
-					<Link href="/" className="inline-flex min-h-11 min-w-11 items-center justify-center transition-colors hover:text-accent">
-						Início
+				<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"}
 					</Link>
 					{trail.map((item, i) => (
 						<span key={item.label} className="flex min-h-11 items-center gap-2">