Add workaround if layout result is invalid

[MatkovIvan]

Proposed Changes

Add extra checks to avoid crash in case of layout result. The root problem will be fixed later.

Testing

fun main() = singleWindowApplication {
    SelectionContainer {
        Text(
            text = buildAnnotatedString {
                append("🦊")
                addStyle(SpanStyle(Color.Red), 1, 2)
            }
        )
    }
}