fix and update

apps/frontend/app/downloads/windows/route.ts

@@ -0,0 +1,15 @@
+import { NextRequest, NextResponse } from 'next/server';
+
+export const runtime = 'nodejs';
+
+function resolveApiBase(request: NextRequest) {
+  const internal = process.env.INTERNAL_API_URL?.replace(/\/$/, '');
+  if (internal) return internal;
+  const origin = request.nextUrl.origin;
+  return `${origin}/idp-api`;
+}
+
+export async function GET(request: NextRequest) {
+  const target = `${resolveApiBase(request)}/releases/download/windows`;
+  return NextResponse.redirect(target, 302);
+}