Fix focus endpoint crash

app/main.py

@@ -1,3 +1,5 @@
+from io import BytesIO
+
 from fastapi import FastAPI, File, Form, HTTPException, UploadFile
 from fastapi.responses import HTMLResponse, StreamingResponse
 from app.config import settings
@@ -113,7 +115,18 @@ async def focus(
 
     try:
         payload = await file.read()
-        return process_image(payload, file.filename or "upload", buffer_ratio=buffer_ratio, detector=detector)
+        result = process_image(payload, file.filename or "upload", buffer_ratio=buffer_ratio, detector=detector)
+        return {
+            "filename": result["filename"],
+            "detector": result["detector"],
+            "method": result["method"],
+            "buffer_ratio": result["buffer_ratio"],
+            "detected_bbox": result["detected_bbox"],
+            "square_bbox": result["square_bbox"],
+            "source_size": result["source_size"],
+            "crop_data_url": result["crop_data_url"],
+            "annotated_data_url": result["annotated_data_url"],
+        }
     except ValueError as exc:
         raise HTTPException(status_code=400, detail=str(exc)) from exc
 
@@ -129,6 +142,6 @@ async def focus_image(
     try:
         payload = await file.read()
         result = process_image(payload, file.filename or "upload", buffer_ratio=buffer_ratio, detector=detector)
-        return StreamingResponse(result["crop_bytes_io"], media_type=result["mime_type"])
+        return StreamingResponse(BytesIO(result["crop_bytes"]), media_type=result["mime_type"])
     except ValueError as exc:
         raise HTTPException(status_code=400, detail=str(exc)) from exc