docs: add /remove-pink endpoint to API documentation

api/main.py

@@ -72,6 +72,7 @@ def root() -> Dict[str, object]:
             "POST /upload-mask": "form-data: mask=file",
             "POST /inpaint": "JSON: {image_id, mask_id}",
             "POST /inpaint-multipart": "form-data: image=file, mask=file",
+            "POST /remove-pink": "form-data: image=file (auto-detects pink segments and removes them)",
             "GET /download/{filename}": "download result image",
             "GET /result/{filename}": "view result image in browser",
             "GET /logs": "recent uploads/results",