Feat/sglang image vllm asr engines#5121
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…-dev Implement the SGLangImageModel stub with sglang-diffusion offline API (sglang.multimodal_gen.DiffGenerator) so text-to-image models can run on the SGLang engine on Linux with NVIDIA GPUs. Supported models: Qwen-Image, Qwen-Image-2512, Z-Image, Z-Image-Turbo and FLUX.1-dev, matching the sglang-diffusion compatibility matrix. Virtualenv specs install sglang[diffusion] when the SGLang engine is selected. Ref xorbitsai#4896 Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Add an engine abstraction layer for audio models (mirroring the image module design): AUDIO_ENGINES registry, engine matching and virtualenv marker support. Families without registered engines keep the legacy hardcoded dispatch, so existing behavior is unchanged. Qwen3-ASR-0.6B/1.7B register two engines: the default transformers engine and, on Linux with NVIDIA GPUs, a vLLM engine backed by qwen_asr's Qwen3ASRModel.LLM which shares the same transcribe API. /v1/engines/audio/<model_name> now returns engine params for audio models. Ref xorbitsai#4896 Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Show the engine dropdown in the launch drawer for audio models that support engine selection (e.g. Qwen3-ASR on transformers/vLLM). Audio models without registered engines keep the previous form, and launch history entries without a model_engine still apply for them. Ref xorbitsai#4896 Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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#4896