feat(i18n): English localization (phase 3)

- Translate content to English across messages/en.json, data/en, lib/data/en, and public/exemplos/en
- Implement localized routing, slugs, and language negotiation with fallback to en
- Build dedicated search index for English with strict book exclusion
- Update components and pages to dynamically render localized strings and datasets
- Verify full structural parity and exact 1:1 match on Portuguese pages via comparator

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

lib/searchIndex.js

@@ -1,9 +1,17 @@
-import seriesData from "@/public/series.json";
-import frameworksData from "@/public/frameworks.json";
-import { categoriasGlossario } from "@/lib/glossarioData";
-import { errosCatalogo } from "@/lib/diagnosticoData";
-import { COMPONENTES_REGISTRY } from "@/lib/componentRegistryData";
-import { montarConhecimento } from "@/lib/searchTopics";
+import seriesDataPt from "@/public/series.json";
+import frameworksDataPt from "@/public/frameworks.json";
+import { categoriasGlossario as glossarioPt } from "@/lib/glossarioData";
+import { errosCatalogo as errosPt } from "@/lib/diagnosticoData";
+import { COMPONENTES_REGISTRY as componentesPt } from "@/lib/componentRegistryData";
+import { montarConhecimento as montarConhecimentoPt } from "@/lib/searchTopics";
+
+import seriesDataEn from "@/data/en/series.json";
+import frameworksDataEn from "@/data/en/frameworks.json";
+import { categoriasGlossario as glossarioEn } from "@/lib/data/en/glossario";
+import { errosCatalogo as errosEn } from "@/lib/data/en/diagnostico";
+import { COMPONENTES_REGISTRY as componentesEn } from "@/lib/data/en/componentes";
+import { montarConhecimento as montarConhecimentoEn } from "@/lib/data/en/topicos";
+
 import { readFileSync, existsSync } from "node:fs";
 import path from "node:path";
 
@@ -15,7 +23,7 @@ import path from "node:path";
  * `keywords` guarda texto extra pesquisável (não exibido).
  */
 
-const PAGINAS = [
+const PAGINAS_PT = [
 	{ titulo: "Início", descricao: "Página inicial do ESPDocs", href: "/", keywords: "home inicio" },
 	{ titulo: "Todas as Séries", descricao: "Pinouts, especificações e restrições de cada série ESP32", href: "/series", keywords: "chips pinout especificações" },
 	{ titulo: "Comparador de Séries", descricao: "Compare até 4 modelos lado a lado", href: "/comparacao", keywords: "comparar comparação versus" },
@@ -29,12 +37,41 @@ const PAGINAS = [
 	{ titulo: "Sobre o Projeto", descricao: "História, autor e Ciência Embarcada", href: "/sobre", keywords: "autor contato" },
 ];
 
+const PAGINAS_EN = [
+	{ titulo: "Home", descricao: "ESPDocs homepage", href: "/en", keywords: "home" },
+	{ titulo: "All Series", descricao: "Pinouts, specifications and restrictions for each ESP32 series", href: "/en/series", keywords: "chips pinout specifications" },
+	{ titulo: "Series Comparator", descricao: "Compare up to 4 models side by side", href: "/en/compare", keywords: "compare comparison versus" },
+	{ titulo: "Board Catalog", descricao: "Development boards, pinouts and purchasing", href: "/en/catalog", keywords: "boards dev boards devkit buy" },
+	{ titulo: "Smart Selector", descricao: "Find the ideal chip for your project", href: "/en/selector", keywords: "quiz choose recommend selector" },
+	{ titulo: "Error Diagnostics", descricao: "Troubleshoot brownout, bootloop, WDT and crashes", href: "/en/diagnostics", keywords: "error problem bug crash issue" },
+	{ titulo: "Frameworks & SDKs", descricao: "ESP-IDF, Arduino, Rust, RainMaker and more", href: "/en/frameworks", keywords: "sdk" },
+	{ titulo: "Component Registry", descricao: "Driver catalog and idf_component.yml generator", href: "/en/components", keywords: "libraries drivers yml components" },
+	{ titulo: "Technical Glossary", descricao: "Essential hardware and software concepts", href: "/en/glossary", keywords: "terms dictionary definition meaning" },
+	{ titulo: "About the Project", descricao: "History, author and open source", href: "/en/about", keywords: "author contact" },
+];
+
 const cortar = (texto = "", max = 140) => (texto.length > max ? `${texto.slice(0, max - 1).trimEnd()}…` : texto);
 
-export function construirIndiceBusca() {
+export function construirIndiceBusca(locale = "pt") {
+	const isEn = locale === "en";
+	const paginas = isEn ? PAGINAS_EN : PAGINAS_PT;
+	const seriesData = isEn ? seriesDataEn : seriesDataPt;
+	const frameworksData = isEn ? frameworksDataEn : frameworksDataPt;
+	const categoriasGlossario = isEn ? glossarioEn : glossarioPt;
+	const errosCatalogo = isEn ? errosEn : errosPt;
+	const componentes = isEn ? componentesEn : componentesPt;
+	const montarConhecimento = isEn ? montarConhecimentoEn : montarConhecimentoPt;
+
+	const prefixo = isEn ? "/en" : "";
+	const slugSeries = `${prefixo}/series`;
+	const slugFrameworks = `${prefixo}/frameworks`;
+	const slugGlossario = isEn ? "/en/glossary" : "/glossario";
+	const slugDiagnostico = isEn ? "/en/diagnostics" : "/diagnostico";
+	const slugComponentes = isEn ? "/en/components" : "/componentes";
+
 	const itens = [];
 
-	for (const p of PAGINAS) {
+	for (const p of paginas) {
 		itens.push({ tipo: "pagina", ...p, keywords: p.keywords });
 	}
 
@@ -43,7 +80,7 @@ export function construirIndiceBusca() {
 			tipo: "serie",
 			titulo: chave,
 			descricao: cortar(`${s.nome_completo ?? ""} — ${s.descricao ?? ""}`),
-			href: `/series/${chave}`,
+			href: `${slugSeries}/${chave}`,
 			keywords: [s.arquitetura, s.wifi, s.bluetooth, s.frequencia, s.nucleos].filter(Boolean).join(" "),
 		});
 	}
@@ -53,7 +90,7 @@ export function construirIndiceBusca() {
 			tipo: "framework",
 			titulo: f.nome ?? chave,
 			descricao: cortar(`${f.nome_completo ?? ""} — ${f.descricao ?? ""}`),
-			href: `/frameworks/${encodeURIComponent(chave)}`,
+			href: `${slugFrameworks}/${encodeURIComponent(chave)}`,
 			keywords: [f.linguagem, f.tipo, f.funcao_principal].filter(Boolean).join(" "),
 		});
 	}
@@ -65,7 +102,7 @@ export function construirIndiceBusca() {
 				tipo: "glossario",
 				titulo: t.termo,
 				descricao: cortar(t.definicao),
-				href: `/glossario#${slug}`,
+				href: `${slugGlossario}#${slug}`,
 				keywords: [cat.nome, t.exemplo].filter(Boolean).join(" "),
 			});
 		}
@@ -76,25 +113,31 @@ export function construirIndiceBusca() {
 			tipo: "erro",
 			titulo: e.titulo,
 			descricao: cortar(e.resumo),
-			href: `/diagnostico#${e.id}`,
+			href: `${slugDiagnostico}#${e.id}`,
 			keywords: [e.logSerial, ...(e.sintomas ?? [])].filter(Boolean).join(" "),
 		});
 	}
 
-	for (const c of COMPONENTES_REGISTRY) {
+	for (const c of componentes) {
 		itens.push({
 			tipo: "componente",
 			titulo: c.titulo,
 			descricao: cortar(c.descricao),
-			href: "/componentes",
+			href: slugComponentes,
 			keywords: [c.name, c.namespace, ...(c.tags ?? [])].filter(Boolean).join(" "),
 		});
 	}
 
 	const conexoes = {};
 	for (const chave of Object.keys(seriesData)) {
-		const arquivo = path.join(process.cwd(), "public", "conexoes", `${chave}.json`);
-		if (existsSync(arquivo)) conexoes[chave] = JSON.parse(readFileSync(arquivo, "utf8"));
+		const pastaConexoes = isEn ? path.join(process.cwd(), "data", "en", "conexoes") : path.join(process.cwd(), "public", "conexoes");
+		const arquivo = path.join(pastaConexoes, `${chave}.json`);
+		if (existsSync(arquivo)) {
+			conexoes[chave] = JSON.parse(readFileSync(arquivo, "utf8"));
+		} else {
+			const fallback = path.join(process.cwd(), "public", "conexoes", `${chave}.json`);
+			if (existsSync(fallback)) conexoes[chave] = JSON.parse(readFileSync(fallback, "utf8"));
+		}
 	}
 
 	return {