chore(ops): harden deployment and runtime setup

components/admin/AdminShell.tsx

@@ -4,6 +4,7 @@ import Image from "next/image";
 import Link from "next/link";
 import { usePathname, useRouter } from "next/navigation";
 import type { ReactNode } from "react";
+import { appVersion } from "@/lib/runtime/version";
 
 const navItems = [
   ["Dashboard", "/admin"],
@@ -40,6 +41,7 @@ export default function AdminShell({ children }: { children: ReactNode }) {
             </Link>
           ))}
         </nav>
+        <p className="admin-version">v{appVersion}</p>
         <button className="admin-logout" type="button" onClick={logout}>Abmelden</button>
       </aside>
       <div className="admin-main">{children}</div>