feat: update client management to use local address as identifier

- change Clients map to use net.Addr as the key type
- update `HandleConnection()` to store clients using LocalAddr
- modify `handleClientCommands()` to delete clients by LocalAddr

🤖

internal/websocket/client_commands.go

@@ -18,7 +18,7 @@ func handleClientCommands(c models.WebsocketClient) {
 		_, message, err := ws.ReadMessage()
 		if err != nil {
 			log.Info("Client disconnected:", "msg", err, "host", ws.NetConn().RemoteAddr(), "clients", len(Clients)-1)
-			delete(Clients, ws)
+			delete(Clients, ws.LocalAddr())
 			break
 		}