feat(i18n): Simplified Chinese (zh-CN), search answers per locale, fr/de/es data fixes

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

components/SeriesTabMenu.jsx

@@ -2,11 +2,12 @@
 
 import { useEffect, useRef, useState } from "react";
 
-export default function SeriesTabMenu({ tabs, isEn = false, isEs = false, isFr = false, isDe = false, locale }) {
+export default function SeriesTabMenu({ tabs, isEn = false, isEs = false, isFr = false, isDe = false, isZh = false, locale }) {
 	const effectiveIsEn = isEn || locale === "en";
 	const effectiveIsEs = isEs || locale === "es";
 	const effectiveIsFr = isFr || locale === "fr";
 	const effectiveIsDe = isDe || locale === "de";
+	const effectiveIsZh = isZh || locale === "zh-CN";
 	const availableTabs = tabs.filter((tab) => tab.available);
 	const [activeTab, setActiveTab] = useState(availableTabs[0]?.id);
 	const refs = useRef({});
@@ -66,7 +67,9 @@ export default function SeriesTabMenu({ tabs, isEn = false, isEs = false, isFr =
 			<div
 				role="tablist"
 				aria-label={
-					effectiveIsEn
+					effectiveIsZh
+						? "开发板与图示"
+						: effectiveIsEn
 						? "Board and diagram"
 						: effectiveIsEs
 						? "Placa y diagrama"