Function decode_layout 

pub fn decode_layout(
    logits: &[f32],
    boxes: &[f32],
    num_queries: usize,
    num_classes: usize,
    page_w: f32,
    page_h: f32,
) -> Vec<Region>

Decode one page’s raw RT-DETR outputs into scored Regions in page points — sigmoid over every (query, class), top-num_queries kept, boxes converted center→corners and scaled. Shared with the browser build; the native batch path calls it per page, so both decode identically.