iOS 26 UI readiness (enable Liquid Glass button styles etc.)

[ianthetechie]

Jacob mentioned he has done this with some of his own stuff and can help with this.

[Archdoog]

This is more or less the pattern I'm using for my map (not nav).

    public var body: some View {
        Button(action: action) {
            if #available(iOS 26.0, *) {
                buttonBody.glassEffect(.clear, in: Capsule())
            } else {
                buttonBody
                    .background(.someColor)
                    .clipShape(Capsule())
            }
        }
        .shadow(color: .black.opacity(0.2), radius: 4, x: 0, y: 4)
    }