Function translate_quin_to_geometry 

pub fn translate_quin_to_geometry(
    quin: &NQuin,
    out: &mut [f32],
    base: usize,
) -> usize

Map matched Quins into a flat f32 lane for Dart Float32List rendering. Uses f32::from_bits on the low 32 bits — no scalar tagging in Quin objects.