feat: add remote gateway client config

src/cli/gateway-cli.ts

@@ -105,7 +105,10 @@ async function runGatewayLoop(params: {
 
 const gatewayCallOpts = (cmd: Command) =>
   cmd
-    .option("--url <url>", "Gateway WebSocket URL", "ws://127.0.0.1:18789")
+    .option(
+      "--url <url>",
+      "Gateway WebSocket URL (defaults to gateway.remote.url when configured)",
+    )
     .option("--token <token>", "Gateway token (if required)")
     .option("--password <password>", "Gateway password (password auth)")
     .option("--timeout <ms>", "Timeout in ms", "10000")