Imports fyne.io/fyne/v2 fyne.io/fyne/v2/app fyne.io/fyne/v2/container fyne.io/fyne/v2/theme fyne.io/fyne/v2/widget golang.org/x/net/websocket Standard library imports crypto/aes crypto/cipher crypto/rand encoding/base64 encoding/json fmt io math/rand net net/url strconv sync time