fix(admin): persist data directory and pass env vars

proxy.ts

@@ -0,0 +1,20 @@
+import { NextResponse, type NextRequest } from "next/server";
+
+const adminSessionCookie = "fs_admin_session";
+
+export function proxy(request: NextRequest) {
+  const { pathname } = request.nextUrl;
+  if (!pathname.startsWith("/admin") || pathname === "/admin/login") return NextResponse.next();
+
+  if (!request.cookies.get(adminSessionCookie)?.value) {
+    const loginUrl = new URL("/admin/login", request.url);
+    loginUrl.searchParams.set("next", pathname);
+    return NextResponse.redirect(loginUrl);
+  }
+
+  return NextResponse.next();
+}
+
+export const config = {
+  matcher: ["/admin/:path*"],
+};