Refactor ping mechanism in WalletWebSocketService for improved connection stability

- Updated the ping method to send a simple text message instead of using the unsupported ping method in browser WebSocket implementations.
- Enhanced logging to indicate potential connection instability when ping fails.

These changes improve the reliability of the WebSocket connection management, contributing to a more stable user experience.

src/modules/wallet/services/WalletWebSocketService.ts

@@ -406,10 +406,11 @@ export class WalletWebSocketService extends BaseService {
   private sendPing(): void {
     if (this.ws && this.ws.readyState === WebSocket.OPEN) {
       try {
-        // Send a ping frame (most WebSocket implementations support this)
-        this.ws.ping?.()
+        // Send a simple ping message (browser WebSocket doesn't have ping method)
+        // Most WebSocket servers respond to text messages as keepalive
+        this.ws.send(JSON.stringify({ type: 'ping' }))
       } catch (error) {
-        console.log('WalletWebSocketService: Ping not supported, connection seems stable')
+        console.log('WalletWebSocketService: Ping failed, connection may be unstable')
       }
     }
   }