Function build_dense_mlp 

pub fn build_dense_mlp(
    gpu: &dyn GpuBackend,
    cfg: &Glm5NextMlpConfig,
    tp_rank: usize,
    full_inter: usize,
    prefix: &str,
    load: LoadFn<'_>,
) -> Result<Glm5NextDenseMlpWeights>

2026-09-25: TP-slice and upload one BF16 SwiGLU MLP, a dense layer or a routed layer’s shared expert. full_inter is the unsliced width; the rank keeps full_inter / tp. Errors when full_inter does not divide over TP or a tensor has the wrong element count.