Update app.py

app.py

@@ -9,6 +9,7 @@ import os
 import sys
 import threading
 import time
+import traceback
 from typing import Optional, Tuple
 
 import gradio as gr
@@ -24,9 +25,11 @@ ENABLE_VLLM = os.getenv("ENABLE_VLLM", "true").lower() in ("true", "1", "yes")
 if ENABLE_VLLM:
     try:
         from vllm import LLM, SamplingParams
-    except ImportError:
+    except ImportError as err:
         print("[WARNING] 无法导入 vllm，自动切换到界面预览模式")
-        print("[INFO] 如需使用 vLLM，请先安装: pip install vllm")
+        print(f"[DETAIL] ImportError: {err}")
+        traceback.print_exc()
+        print("[INFO] 如需使用 vLLM，请确认容器环境已正确安装并可导入 vllm")
         ENABLE_VLLM = False
         LLM = None
         SamplingParams = None
@@ -264,7 +267,8 @@ with gr.Blocks(title="Step Audio 2 Chat", theme=gr.themes.Soft()) as demo:
             chatbot = gr.Chatbot(
                 label="聊天历史",
                 height=400,
-                show_copy_button=True
+                show_copy_button=True,
+                type="messages"
             )
             
             user_text = gr.Textbox(
@@ -399,4 +403,3 @@ if __name__ == "__main__":
         server_port=args.port,
         share=False
     )
-