Fix focus endpoint crash

app/vision.py

@@ -1,7 +1,6 @@
 from __future__ import annotations
 
 from dataclasses import dataclass
-from io import BytesIO
 from pathlib import Path
 from typing import Any
 
@@ -91,7 +90,7 @@ def detect_face(image: np.ndarray) -> BBox | None:
     faces = FACE_CASCADE.detectMultiScale(gray, scaleFactor=1.08, minNeighbors=5, minSize=(24, 24))
     if len(faces) == 0:
         return None
-    x, y, w, h = max((map(int, face) for face in faces), key=lambda rect: rect[2] * rect[3])
+    x, y, w, h = max((tuple(map(int, face)) for face in faces), key=lambda rect: rect[2] * rect[3])
     return BBox(x=x, y=y, w=w, h=h)
 
 
@@ -192,5 +191,5 @@ def process_image(image_bytes: bytes, filename: str, buffer_ratio: float = 0.15,
         "crop_data_url": _data_url(crop_bytes, mime_type),
         "annotated_data_url": _data_url(annotated_bytes, mime_type),
         "mime_type": mime_type,
-        "crop_bytes_io": BytesIO(crop_bytes),
+        "crop_bytes": crop_bytes,
     }