[diffusion] app: add ComfyUI plugin support for SGLang-Diffusion (#15271)

Co-authored-by: niehen6174 <niehen.6174@gmail.com>
Co-authored-by: Mick <mickjagger19@icloud.com>
Co-authored-by: niehen6174 <nihen6174@gmail.com>

python/sglang/multimodal_gen/runtime/server_args.py

@@ -265,6 +265,11 @@ class ServerArgs:
 
     pipeline_config: PipelineConfig = field(default_factory=PipelineConfig, repr=False)
 
+    # Pipeline override
+    pipeline_class_name: str | None = (
+        None  # Override pipeline class from model_index.json
+    )
+
     # LoRA parameters
     # (Wenxuan) prefer to keep it here instead of in pipeline config to not make it complicated.
     lora_path: str | None = None
@@ -285,6 +290,9 @@ class ServerArgs:
     use_fsdp_inference: bool = False
     pin_cpu_memory: bool = True
 
+    # ComfyUI integration
+    comfyui_mode: bool = False
+
     # STA (Sliding Tile Attention) parameters
     mask_strategy_file_path: str | None = None
     STA_mode: STA_Mode = STA_Mode.STA_INFERENCE