Upload app.py

app.py

@@ -1385,7 +1385,7 @@ def _chat_fragment():
 
             with st.chat_message("assistant"):
                 container = st.empty()
-                st.session_state["last_meta"] = ""  # 清空旧的meta，避免显示上一次的内容
+                meta_placeholder = st.empty()  # 用empty占位，避免提前渲染
 
                 # 联网模式：大模型 + 网络搜索，不查知识库
                 # 知识库模式：RAG 检索本地知识库
@@ -1403,8 +1403,8 @@ def _chat_fragment():
                         llm_answer(q, relevant_docs, _model_name, _web_on)
                     )
                     meta_info = st.session_state.get("last_meta", "")
-                    if meta_info:  # 只在有meta时显示
-                        st.caption(meta_info)
+                    if meta_info:
+                        meta_placeholder.caption(meta_info)  # 流式完成后才显示meta
                     st.session_state.messages.append(
                         {"role": "assistant", "content": full_response, "meta": meta_info}
                     )