fixed WindowPath issue

app.py

@@ -3,6 +3,9 @@ from fastai.vision.all import *
 import pathlib
 import os
 
+# 🔧 Fix for WindowsPath issue on Linux (Hugging Face Spaces)
+pathlib.WindowsPath = pathlib.PosixPath
+
 # Load the exported model
 learn = load_learner("model_mnist.pkl")