fix: define rgb_bytes before torch.frombuffer in image decode

kie_api/nanobanana.py

@@ -268,8 +268,14 @@ def _image_bytes_to_tensor(image_bytes: bytes) -> torch.Tensor:
     try:
         with Image.open(BytesIO(image_bytes)) as img:
             rgb_image = img.convert("RGB")
+            rgb_bytes = rgb_image.tobytes()
+
             tensor = torch.frombuffer(rgb_bytes, dtype=torch.uint8).clone()
-            tensor = tensor.view(rgb_image.height, rgb_image.width, 3).float() / 255.0
+            tensor = tensor.view(
+                rgb_image.height, rgb_image.width, 3
+            ).float() / 255.0
+
             return tensor.unsqueeze(0)
     except Exception as exc:
         raise RuntimeError("Failed to decode result image.") from exc
+