Update app.py

app.py

@@ -205,7 +205,7 @@ def clear_all(history, uploaded_file_paths, chats):
     #die session variable in gradio erweitern und alle fliepath neu in das gr.File hochladen
     uploaded_file_paths=  uploaded_file_paths + [file_path_download]
  
-    return None, gr.Image(visible=False), uploaded_file_paths, [], gr.File(uploaded_file_paths, label="Download-Chatverläufe",  visible=True, file_count="multiple", interactive = False), chats
+    return None, gr.Image(visible=False), uploaded_file_paths, [], gr.File(uploaded_file_paths, label="Download-Chatverläufe",  visible=True, file_count="multiple", interactive = False, mimetype="application/pdf"), chats
     
 
 #wenn löschen Button geklickt