Use status

Gradio allow the change of status from pending to done. It's a bit more
clear for the user.

app.py

@@ -96,6 +96,7 @@ def bot(history: list, max_num_tokens: int, final_num_tokens: int):
             content=str(""),
             metadata={
                 "title": "Thinking",
+                "status": "pending",
             },
         )
     )
@@ -123,6 +124,7 @@ def bot(history: list, max_num_tokens: int, final_num_tokens: int):
         # rebuild the history with the new content
         history[-1].content += prepend.format(question=question)
         if ANSWER_MARKER in prepend:
+            history[-1].metadata["status"] = "done"
             # stop thinking, this is the answer now (no metadata for intermediate steps)
             history.append(gr.ChatMessage(role="assistant", content=""))
         for token in streamer: