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/LanguageSelector.jsx

@@ -63,8 +63,8 @@ export default function LanguageSelector() {
 				className="flex h-11 min-w-[44px] items-center gap-1.5 rounded-full border border-line bg-surface px-3 text-sm font-semibold text-ink transition-colors hover:bg-surface-2 focus-visible:outline-2 focus-visible:outline-accent"
 				aria-haspopup="listbox"
 				aria-expanded={open}
-				aria-label={`Idioma atual: ${currentLocale.label}. Clique para trocar de idioma.`}
-				title={`Idioma: ${currentLocale.label}`}
+				aria-label={currentLocaleCode === "en" ? `Current language: ${currentLocale.label}. Click to switch language.` : `Idioma atual: ${currentLocale.label}. Clique para trocar de idioma.`}
+				title={currentLocaleCode === "en" ? `Language: ${currentLocale.label}` : `Idioma: ${currentLocale.label}`}
 			>
 				<Globe className="h-4 w-4 text-muted" aria-hidden="true" />
 				<span className="font-semibold">{currentLocale.short}</span>
@@ -77,7 +77,7 @@ export default function LanguageSelector() {
 			{open && (
 				<div
 					role="listbox"
-					aria-label="Idiomas disponíveis"
+					aria-label={currentLocaleCode === "en" ? "Available languages" : "Idiomas disponíveis"}
 					className="absolute right-0 top-full mt-2 w-48 rounded-2xl border border-line bg-surface p-1.5 shadow-[0_24px_60px_-20px_rgba(15,23,42,0.35)] dark:shadow-[0_24px_60px_-20px_rgba(0,0,0,0.8)] z-50"
 				>
 					{LOCALES.map((loc) => {