fix: file upload handling for Gradio NamedString objects

app.py

@@ -27,17 +27,17 @@ def handle_file_upload(file):
     if file is None:
         return None, "No file uploaded"
 
-    filename = Path(file.name).stem
-    formatted_title = sanitize_filename(filename)
+    filename = os.path.basename(file.name)
+    formatted_title = sanitize_filename(Path(filename).stem)
     
     input_path = os.path.join(INPUT_FOLDER, "wav", f"{formatted_title}.wav")
     os.makedirs(os.path.dirname(input_path), exist_ok=True)
     
-    with open(input_path, "wb") as f:
-        f.write(file.read())
+    # Copy the uploaded file to the input folder
+    shutil.copy(file.name, input_path)
     
     return input_path, formatted_title
-
+    
 def run_inference(model_type, config_path, start_check_point, input_dir, output_dir, device_ids="0"):
     command = [
         "python", "inference.py",