Function sketch_profile_display_payload 

pub fn sketch_profile_display_payload(
    profile: &SketchProfile,
) -> DisplaySolidPayload

Native display payload for a solved sketch PROFILE — the SHEET-SOLID view of a committed sketch: a planar FACE mesh + its named boundary EDGES + corner VERTICES, so a sketch is pickable / selectable / measurable through the exact same display path as a real solid. NO solid is registered — the payload is synthesized directly from the profile, so it owns no scene handle (the display carries source_handle = 0).

The FACE triangulates each region (outer boundary minus holes) via the watertight planar path, mapped to world through the profile’s frame; each triangle rides face id 0 (one logical sheet face). EDGES are each boundary curve sampled to a world polyline, named from the profile’s {sketchId}:G{gid} edge names; VERTICES are the loop corners. An empty profile (no closed region) yields an empty payload (no face, no edges) — an open/underconstrained sketch has no sheet.