feat(api): add detailer postprocess script and /sdapi/v1/detail endpoint

Surface YoloRestorer.restore() as a standalone operation: a Detailer
postprocessing script in the Process tab and a thin /sdapi/v1/detail
endpoint, neither requiring a base generation pass.

- modules/postprocess/yolo.py: YoloRestorer.make_processing() builds the
  synthetic Img2Img processing object both entry points feed to restore(),
  resolving the seed so the inpaint passes are reproducible
- modules/api/process.py: post_detail handler exposes the full detailer
  parameter set and returns the detailed image plus optional annotations
  as base64
- scripts/postprocessing_detailer.py: reuses shared.yolo.ui('extras') and
  runs through make_processing()
- modules/postprocessing.py: run_extras takes a per-script script_args
  dict, also letting the extras API drive other scripts such as Remove
  background; omitting it leaves existing callers unchanged
- modules/api/models.py: ReqDetail / ResDetail
- modules/processing_info.py: guard create_infotext's Image/Hires CFG
  reporting against an unset (None) cfg_image, matching the is-not-None
  checks the other cfg_image readers use; the detailer inpaint pass runs
  with it unset
- test/test-detailer-api.py: covers both paths; effect tests measure the
  diff inside the detected region with extreme isolated parameter values,
  and the suite disables model quantization for the run and restores the
  original settings afterward

modules/api/models.py

@@ -343,6 +343,7 @@ class ReqProcess(BaseModel):
     upscaler_1: str = Field(default="None", title="Main upscaler", description=f"The name of the main upscaler to use, it has to be one of this list: {' , '.join([x.name for x in shared.sd_upscalers])}")
     upscaler_2: str = Field(default="None", title="Refine upscaler", description=f"The name of the secondary upscaler to use, it has to be one of this list: {' , '.join([x.name for x in shared.sd_upscalers])}")
     extras_upscaler_2_visibility: float = Field(default=0, title="Refine upscaler visibility", ge=0, le=1, allow_inf_nan=False, description="Sets the visibility of secondary upscaler, values should be between 0 and 1.")
+    script_args: dict | None = Field(default=None, title="Script args", description="Per-script arguments keyed by script name, e.g. {\"Detailer\": {\"strength\": 0.5}, \"Remove background\": {\"model\": \"u2net\"}}.")
 
 class ResProcess(BaseModel):
     html_info: str = Field(title="HTML info", description="A series of HTML tags containing the process info.")
@@ -391,6 +392,44 @@ class ReqProcessBatch(ReqProcess):
 class ResProcessBatch(ResProcess):
     images: list[str] = Field(title="Images", description="The generated images in base64 format.")
 
+class ReqDetail(BaseModel):
+    image: str = Field(title="Image", description="Base64-encoded input image to detail")
+    seed: int | None = Field(default=-1, title="Seed", description="Seed for inpainting passes (-1 = random)")
+    detailer_models: list[str] | None = Field(default=None, title="Detailer models", description="List of YOLO detailer model names to run; falls back to shared.opts.detailer_models when omitted")
+    detailer_prompt: str | None = Field(default=None, title="Detailer prompt", description="Override prompt for detailer pass; supports [PROMPT]/[prompt] splice tokens")
+    detailer_negative: str | None = Field(default=None, title="Detailer negative", description="Override negative prompt for detailer pass")
+    detailer_steps: int | None = Field(default=None, ge=0, le=99, title="Detailer steps")
+    detailer_strength: float | None = Field(default=None, ge=0.0, le=1.0, title="Detailer strength")
+    detailer_resolution: int | None = Field(default=None, ge=256, le=4096, title="Detailer resolution")
+    detailer_sampler: str | None = Field(default=None, title="Detailer sampler", description="Sampler name for the inpaint pass; a named sampler activates the scheduler overrides below, 'Default' keeps the model scheduler")
+    detailer_prediction: str | None = Field(default=None, title="Detailer prediction", description="Scheduler prediction type override (default/epsilon/sample/v_prediction/flow_prediction)")
+    detailer_shift: float | None = Field(default=None, ge=0.0, le=10.0, title="Detailer flow shift", description="Flow/sampler shift for the inpaint pass; needs a named sampler")
+    detailer_cfg_scale: float | None = Field(default=None, ge=0.0, le=30.0, title="Detailer guidance scale", description="CFG/guidance scale for the inpaint pass")
+    detailer_loworder: bool | None = Field(default=None, title="Detailer low order")
+    detailer_thresholding: bool | None = Field(default=None, title="Detailer thresholding")
+    detailer_dynamic: bool | None = Field(default=None, title="Detailer dynamic shift")
+    detailer_rescale: bool | None = Field(default=None, title="Detailer rescale betas")
+    detailer_classes: str | None = Field(default=None, title="Detailer classes", description="Comma-separated class allowlist (e.g. 'face,eye')")
+    detailer_conf: float | None = Field(default=None, ge=0.0, le=1.0, title="Min confidence")
+    detailer_iou: float | None = Field(default=None, ge=0.0, le=1.0, title="Max overlap (IoU)")
+    detailer_max: int | None = Field(default=None, ge=1, title="Max detections")
+    detailer_min_size: float | None = Field(default=None, ge=0.0, le=1.0, title="Min relative size")
+    detailer_max_size: float | None = Field(default=None, ge=0.0, le=1.0, title="Max relative size")
+    detailer_blur: int | None = Field(default=None, ge=0, le=100, title="Mask blur")
+    detailer_padding: int | None = Field(default=None, ge=0, le=100, title="Mask padding")
+    detailer_segmentation: bool | None = Field(default=None, title="Use segmentation", description="Use seg-mask instead of bbox (requires a -seg model)")
+    detailer_merge: bool | None = Field(default=None, title="Merge detections")
+    detailer_sort: bool | None = Field(default=None, title="Sort detections", description="Sort detections left-to-right for consistency")
+    detailer_sigma_adjust: float | None = Field(default=None, ge=0.5, le=1.5, title="Renoise sigma")
+    detailer_sigma_adjust_max: float | None = Field(default=None, ge=0.0, le=1.0, title="Renoise end")
+    detailer_include_detections: bool | None = Field(default=None, title="Include detections", description="Return annotated debug image alongside the detailed result")
+
+class ResDetail(BaseModel):
+    image: str = Field(title="Image", description="Detailed image (base64)")
+    detections: str | None = Field(default=None, title="Detections", description="Annotated debug image (base64) when detailer_include_detections=True")
+    seed: int = Field(default=-1, title="Seed", description="Effective seed used for the detailer pass")
+    info: str = Field(default='', title="Info", description="Postprocessing info string")
+
 class ReqImageInfo(BaseModel):
     image: str = Field(title="Image", description="The base64 encoded image")