fix app naming collision

app.py

@@ -3,6 +3,6 @@
 import sys
 sys.path.append('.')
 
-from app.gradio_app import demo
+from gradio_ui.gradio_app import demo
 
 demo.launch()

{app → gradio_ui}/gradio_app.py

@@ -8,7 +8,7 @@ from PIL import Image, ImageDraw
 
 from model.model import ImageToDigitTransformer
 from utils.tokenizer import START, FINISH, decode
-from app.preprocess import preprocess_canvases
+from gradio_ui.preprocess import preprocess_canvases
 
 # Load model
 device = torch.device("mps" if torch.backends.mps.is_available() else "cpu")