Persist one browser user agent for Axios and WebSockets

lib/topstepx-class.ts

@@ -22,7 +22,7 @@
  *   all zeros; a blown account shows up as canTrade=false → active=false.
  */
 
-import axios from 'axios';
+import axios from './http-client';
 import * as signalR from '@microsoft/signalr';
 import { currentTradeDateCT, FUND_EVENT_MIN, fundReconcileStep, type FundSighting } from './trading-logic';
 import { getCachedContract } from './contract-resolver';
@@ -676,14 +676,13 @@ export class TopstepXClient implements PlatformClient {
         // everything the hub does, just slower).
         // With skipNegotiation the hub is a single websocket to a broker
         // endpoint, so it follows the operator's proxy like the REST calls do.
-        const proxiedWs = signalrWebSocket();
+        const configuredWs = signalrWebSocket();
         const hub = new signalR.HubConnectionBuilder()
             .withUrl(USER_HUB, {
                 skipNegotiation: true,
                 transport: signalR.HttpTransportType.WebSockets,
                 accessTokenFactory: () => this.token ?? '',
-                // eslint-disable-next-line @typescript-eslint/no-explicit-any
-                ...(proxiedWs ? { WebSocket: proxiedWs as any } : {}),
+                ...{ WebSocket: configuredWs },
             })
             .withAutomaticReconnect()
             .configureLogging(signalR.LogLevel.Warning)