修复标题语种自适应

src/server/deep_agent/tools/conversation_title_tool.py

@@ -23,15 +23,14 @@ async def conversation_title(agent, config):
             break
 
     prompt = f"""
-    请根据以下首次对话内容，生成一个简洁、精准的标题（2-15个字）：
+Generate a concise and precise title based on the following first-round conversation:
+User: {user_msg}
+Assistant: {ai_msg}
 
-    用户：{user_msg}
-    助手：{ai_msg}
-
-    要求：
-    1. 标题需概括对话核心内容
-    2. 语言简洁、符合中文表达习惯
-    3. 仅返回标题，不要额外解释
+Rules:
+1. The title length should be controlled between 2 and 15 characters/word.
+2. **The title must be in the same language as the user’s question**. If the user is Chinese, the output will be Chinese, and if the user is English, the output will be English.
+3. Only return the pure title, no explanation, no punctuation, no book title.
     """
     response = await qwen_plus_llm.ainvoke(prompt)
     title = response.content.strip()