Release 1.3.1: fix hy2 UDP ping and shop link open.

Co-authored-by: Cursor <cursoragent@cursor.com>

internal/netcheck/ping_test.go

@@ -0,0 +1,33 @@
+package netcheck
+
+import (
+	"context"
+	"strings"
+	"testing"
+	"time"
+
+	"vpnclient/internal/config"
+)
+
+func TestFriendlyDialError(t *testing.T) {
+	err := &netError{s: "dial tcp 1.2.3.4:22514: connectex: No connection could be made because the target machine actively refused it."}
+	got := friendlyDialError(err, true)
+	if !strings.Contains(got, "UDP") {
+		t.Fatalf("got %q", got)
+	}
+}
+
+type netError struct{ s string }
+
+func (e *netError) Error() string   { return e.s }
+func (e *netError) Timeout() bool   { return false }
+func (e *netError) Temporary() bool { return false }
+
+func TestPingProfileEmpty(t *testing.T) {
+	ctx, cancel := context.WithTimeout(context.Background(), time.Second)
+	defer cancel()
+	r := PingProfile(ctx, "x", config.ProtocolHysteria2, "")
+	if r.OK || r.Error == "" {
+		t.Fatalf("%+v", r)
+	}
+}