Make WebSocket headers configurable with sensible defaults

- Provide default browser-like headers (required by TradingView WAF)
- Allow users to override via clientOptions.headers
- Update User-Agent to Windows/Chrome 131 (more common, more recent)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: clins1994

src/client.js

@@ -218,6 +218,7 @@ module.exports = class Client {
    * @prop {boolean} [DEBUG] Enable debug mode
    * @prop {'data' | 'prodata' | 'widgetdata'} [server] Server type
    * @prop {string} [location] Auth page location (For france: https://fr.tradingview.com/)
+   * @prop {Object<string, string>} [headers] Custom headers for the WebSocket connection (e.g. for WAF bypass)
    */
 
   /**
@@ -228,14 +229,16 @@ module.exports = class Client {
     if (clientOptions.DEBUG) global.TW_DEBUG = clientOptions.DEBUG;
 
     const server = clientOptions.server || 'data';
+    const defaultHeaders = {
+      'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36',
+      'Accept-Language': 'en-US,en;q=0.9',
+      'Cache-Control': 'no-cache',
+      Pragma: 'no-cache',
+    };
+
     this.#ws = new WebSocket(`wss://${server}.tradingview.com/socket.io/websocket?from=chart&type=chart`, {
       origin: 'https://www.tradingview.com',
-      headers: {
-        'User-Agent': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36',
-        'Accept-Language': 'en-US,en;q=0.9',
-        'Cache-Control': 'no-cache',
-        Pragma: 'no-cache',
-      },
+      headers: { ...defaultHeaders, ...clientOptions.headers },
     });
 
     if (clientOptions.token) {