Function show_native_sheet 

pub fn show_native_sheet(spec: SheetSpec) -> Presentation<SheetOutcome> 

The app-facing native-presentation entry points over crate::present: for an alert and for a sheet, an awaitable form and an events-as-signals form — see the present submodule doc. The app-facing native-presentation entry points over crate::present: for an alert and for a sheet, an awaitable form and an events-as-signals form — see the present submodule doc. The app-facing native-presentation entry points over crate::present: for an alert and for a sheet, an awaitable form and an events-as-signals form — see the present submodule doc. Present a native sheet and await its one outcome.

Resolves Ok(outcome) once the user (an action row, a swipe-down on a dismissible sheet), SheetHandle::dismiss or the host going away ends the sheet, or Err: an invalid spec, Busy (any other presentation is live), no host to present over, or Unsupported — every platform but iOS/iPadOS today (macOS and Android sheet arms are follow-up work). Take Presentation::sheet_handle before awaiting to move or dismiss it.

iPad in regular width ignores detents: the system presents a centered form sheet there; only an edge-attached sheet (iPhone, iPad in compact width) rests at SheetSpec::detents. Never rely on detent parity.

let spec = SheetSpec::new(
    SheetContent::new()
        .with_title("Share draft")
        .with_message("Pick where it goes.")
        .with_action("copy", "Copy link", ActionRole::Default),
)
.with_theme(&theme)
.on_detent(move |detent| expanded.set(detent == Detent::Large));
let presentation = show_native_sheet(spec);
let handle = presentation.sheet_handle();
frust::spawn_local(async move {
    if let Ok(SheetOutcome::Action(id)) = presentation.await {
        last_action.set(Some(id));
    }
});