Fix admin regressions from Biome refactor: theme init, mobile nav, i18n.

Restore valid browser JS in theme-init, close mobile sidebar on navigation, and split autoDjForm title/trackTitle across locales.

Co-authored-by: Cursor <[email protected]>

src/components/admin/admin-nav-link.tsx

@@ -3,6 +3,7 @@
 import Link from "next/link";
 import { usePathname } from "next/navigation";
 import type { ReactNode } from "react";
+import { useAdminMobile } from "@/components/admin/admin-mobile-wrapper";
 
 /**
  * Sidebar link that highlights when its route is active. "/admin" matches
@@ -19,6 +20,7 @@ export function AdminNavLink({
 	children: ReactNode;
 }) {
 	const pathname = usePathname() ?? "";
+	const { close } = useAdminMobile();
 	const active =
 		href === "/admin"
 			? pathname === "/admin"
@@ -27,6 +29,7 @@ export function AdminNavLink({
 	return (
 		<Link
 			href={href}
+			onClick={close}
 			aria-current={active ? "page" : undefined}
 			className={`group flex items-center gap-2.5 rounded-xl px-3 py-2 text-sm no-underline transition-colors duration-150
 				focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-[var(--admin-accent)] focus-visible:ring-offset-1 focus-visible:ring-offset-[var(--admin-sidebar-background)] ${