Initial commit: eldov.win portfolio with admin backend

Privates Portfolio von eldov (Jan Wagner). Next.js 16 / React 19 / Tailwind 4 /
SQLite. Eigenes Dark-/Terminal-Theme (Magenta+Grün-Akzente, ASCII-Boxen).

Public Routes (DE default, /en für Englisch):
- /, /ueber-mich, /projekte, /projekte/[slug], /kontakt, /impressum, /datenschutz
- Sitemap, robots, OG, JSON-LD

Admin (HMAC-Single-User, HttpOnly-Cookie):
- /admin/login, /admin/dashboard, /admin/profile, /admin/projects (CRUD)
- API: /api/admin/{login,logout,session,profile,projects,projects/[slug]}

Initial-Seed: Hermes, Casino-Bot, Polymarket-Trader, QuantMuse, Crypto-/Trade-Bot,
TS6-Bot, Freewarez-Landingpage, Minecraft-Portal, OSS-Themes, AI-Subscription-Manager,
LAMP-Link-Themes, Android. KEIN Batchmaker/W-Make (das gehört zu w-make.com).

Stack:
- better-sqlite3 mit Schema-Migration + idempotentem Seed
- HMAC-signiertes Session-Cookie mit timingSafeEqual
- Rate-Limit für /api/admin/login
- Docker + deploy-vps.sh analog w-make-com → free-warez.top

src/app/[lang]/layout.tsx

@@ -0,0 +1,21 @@
+import { isLocale, type Locale } from "@/i18n/routes";
+import { SiteHeader } from "@/components/site-header";
+import { SiteFooter } from "@/components/site-footer";
+
+export default async function LangLayout({
+  children,
+  params,
+}: {
+  children: React.ReactNode;
+  params: Promise<{ lang: string }>;
+}) {
+  const { lang } = await params;
+  const locale: Locale = isLocale(lang) ? lang : "de";
+  return (
+    <div className="flex min-h-screen flex-col">
+      <SiteHeader locale={locale} />
+      <main className="mx-auto w-full max-w-5xl flex-1 px-4 py-8">{children}</main>
+      <SiteFooter locale={locale} />
+    </div>
+  );
+}