feat: German as the main language, English under /en, with a language switch

The site now exists in German (at the root, with /impressum and /datenschutz) and English (/en). A request without a language follows the visitor's choice from the language switch, then the browser language, then German; the old English legal addresses move to /en for good. All visible texts are data in src/content/de.ts and en.ts, so components hold none of their own. The header carries a DE/EN switch whose bit curtain covers the page while it is swapped and reopens at the same reading position. Title, description, canonical, hreflang, Open Graph, the share image, the sitemap and the structured data are per language. The privacy notice now describes the cookie that remembers the chosen language. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-10-04 13:07:22 +02:00
parent e89a248ca5
commit 75993100fa
72 changed files with 4418 additions and 1405 deletions
@@ -0,0 +1,138 @@
+import type { Metadata, Viewport } from "next";
+import type { StaticImageData } from "next/image";
+import { Inter, JetBrains_Mono, Newsreader } from "next/font/google";
+import { Analytics } from "@/src/components/Analytics";
+import { BitBurst } from "@/src/components/bits/BitBurst";
+import { BitGlow } from "@/src/components/bits/BitGlow";
+import { Footer } from "@/src/components/Footer";
+import { Header } from "@/src/components/Header";
+import { InteractiveElements } from "@/src/components/InteractiveElements";
+import { ContentProvider } from "@/src/components/ContentProvider";
+import { BitCurtain } from "@/src/components/bits/BitCurtain";
+import shareImageDe from "@/src/assets/share/share-de.png";
+import shareImageEn from "@/src/assets/share/share-en.png";
+import { contentFor } from "@/src/content";
+import { INDEXING, SITE_NAME, SITE_URL } from "@/src/content/site";
+import { robotsMeta } from "@/src/domain/indexing";
+import {
+  DEFAULT_LOCALE,
+  LOCALES,
+  parseLocale,
+  type Locale,
+} from "@/src/domain/locale";
+import { pathFor } from "@/src/domain/routes";
+import "../globals.css";
+
+const inter = Inter({ subsets: ["latin"], variable: "--font-inter" });
+// A real monospaced fallback has almost the same letter width. The default
+// fallback (a resized Arial) wraps the mono labels differently, so the hero
+// jumped when the font arrived.
+const jetbrainsMono = JetBrains_Mono({
+  subsets: ["latin"],
+  variable: "--font-jetbrains-mono",
+  display: "swap",
+  adjustFontFallback: false,
+  fallback: ["ui-monospace", "Menlo", "Consolas", "monospace"],
+});
+const newsreader = Newsreader({
+  subsets: ["latin"],
+  variable: "--font-newsreader",
+  style: "italic",
+  display: "swap",
+});
+
+type Props = {
+  readonly children: React.ReactNode;
+  readonly params: Promise<{ readonly locale: string }>;
+};
+
+/** The share image is a screenshot of the hero in that language (see scripts/render-share-image.mjs). */
+const SHARE_IMAGE: Readonly<Record<Locale, StaticImageData>> = {
+  en: shareImageEn,
+  de: shareImageDe,
+};
+
+export function generateStaticParams() {
+  return LOCALES.map((locale) => ({ locale }));
+}
+
+export async function generateMetadata({ params }: Props): Promise<Metadata> {
+  const locale = parseLocale((await params).locale) ?? DEFAULT_LOCALE;
+  const { site } = contentFor(locale);
+  const image = SHARE_IMAGE[locale];
+  const images = [
+    {
+      url: image.src,
+      width: image.width,
+      height: image.height,
+      alt: site.shareImageAlt,
+    },
+  ];
+
+  return {
+    metadataBase: new URL(SITE_URL),
+    title: {
+      default: site.title,
+      template: `%s | ${SITE_NAME}`,
+    },
+    description: site.description,
+    applicationName: SITE_NAME,
+    authors: [{ name: SITE_NAME, url: SITE_URL }],
+    creator: SITE_NAME,
+    robots: robotsMeta(INDEXING),
+    icons: {
+      icon: "/favicon.svg",
+      apple: "/apple-touch-icon.png",
+    },
+    openGraph: {
+      type: "website",
+      url: pathFor("home", locale),
+      siteName: SITE_NAME,
+      locale: site.ogLocale,
+      alternateLocale: LOCALES.filter((other) => other !== locale).map(
+        (other) => contentFor(other).site.ogLocale,
+      ),
+      title: site.title,
+      description: site.description,
+      images,
+    },
+    twitter: {
+      card: "summary_large_image",
+      title: site.title,
+      description: site.description,
+      images,
+    },
+  };
+}
+
+export const viewport: Viewport = {
+  themeColor: "#ffffff",
+  colorScheme: "light",
+  viewportFit: "cover",
+};
+
+export default async function RootLayout({ children, params }: Props) {
+  // The proxy only lets the two languages through; anything else is a file-like
+  // address that ends in the error page of the main language.
+  const locale = parseLocale((await params).locale) ?? DEFAULT_LOCALE;
+
+  return (
+    <html
+      lang={locale}
+      className={`${inter.variable} ${newsreader.variable} ${jetbrainsMono.variable}`}
+    >
+      <body className="min-h-screen bg-white">
+        <ContentProvider locale={locale} content={contentFor(locale)}>
+          <Header />
+          <main>{children}</main>
+          <Footer />
+          <InteractiveElements />
+          <BitCurtain />
+        </ContentProvider>
+        <BitBurst />
+        <BitGlow />
+        <Analytics />
+      </body>
+    </html>
+  );
+}