Update app.py

app.py

@@ -28,6 +28,7 @@ with gr.Blocks() as demo:
             sources = gr.CheckboxGroup(
                 choices=mock_sources(), label="選取所有來源", interactive=True
             )
+            upload_file = gr.File(label="從電腦添加文件", file_types=[".txt", ".pdf", ".docx"])
 
         with gr.Column():
             gr.Markdown("### 對話區域")