fix(web): дождаться ответа backend при длительной speed-команде

next.config.ts

@@ -5,6 +5,9 @@ const nextConfig: NextConfig = {
   output: "standalone",
   experimental: {
     proxyClientMaxBodySize: "512mb",
+    // Speed commands include RouterOS waits and post-test Ping; the UI allows 120s.
+    // Let the backend return its structured outcome before the rewrite times out.
+    proxyTimeout: 180_000,
   },
   async rewrites() {
     const backendUrl = backendInternalUrl();