v0.40.10-rc0 新增 gemma4-nemotron 渲染器，並支援 MLX 上的 DFlash 草稿

renderers: add gemma4-nemotron renderer Add a Gemma 4 renderer variant that renders assistant content before its tool calls rather than after the tool responses. Models opt in with RENDERER gemma4-nemotron; gemma4 auto-detection is unchanged. Adds the corresponding chat template as a test fixture for Jinja parity checks. mlx: support Gemma 4 targets with DFlash drafts Load a draft-owned output head when its config requires one, while preserving the target-head path used by existing DFlash models. Expose Gemma 4 hidden-state taps and raw logits for speculative decoding. Report safetensors target precision independently of quantized draft weights.