Function responsive_render 

pub fn responsive_render<'a, Message, F>(build: F) -> Element<'a, Message>
where
    F: Fn(f32) -> AppLayout<Element<'a, Message>, Message> + 'a,
    Message: Clone + 'a,

Renders an AppLayout that may depend on the available width.

build receives the width available to the layout (in logical pixels) and returns the AppLayout to render at that width. It may be called again whenever the available size changes — see iced::widget::Responsive’s own documentation for the underlying mechanism.

A sibling to crate::render::render, not a replacement — this is engine capability, not design-gated, so it lives in the default surface next to render. Applications not calling this entry point are unaffected; render’s own behavior and signature are unchanged.

use snora::{AppLayout, responsive_render};

fn view(state: &State) -> Element<'_, Message> {
    responsive_render(move |width| {
        let layout = AppLayout::new(body(state));
        if width < 600.0 {
            layout // application's own choice: no sidebar below 600px
        } else {
            layout.side_bar(sidebar(state))
        }
    })
}