_convert_nvfp4_post_load() was converting wq_b, wo_b, fused_wqa_wkv
from NVFP4→BF16. These layers already have FlashInferCutlassNvFp4LinearKernel
registered as their quant_method — they CAN run native NVFP4.
Now only wo_a gets FP8 conversion (fp8_einsum requires FP8) and
compressor gets BF16 reconstruction (weight_loader issue).
Everything else stays NVFP4 native — Blackwell FP4 acceleration
for the full model, not just the MoE experts.
This also eliminates the 5-minute NVFP4→BF16 conversion loop.
biondizzle
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