fix:function call bug (#268)

* 优化function call消息处理

* fix:用户说话重复记录bug

* 2025-3-10-优化llm intent (#254)

Co-authored-by: 欣南科技 <huangrongzhuang@xin-nan.com>

* update:回复上版提示词，无需再二次识别歌曲名

---------

Co-authored-by: 玄凤科技 <eric230308@gmail.com>
Co-authored-by: hrz <1710360675@qq.com>
Co-authored-by: Jiao Haoyang <108573524+XuSenfeng@users.noreply.github.com>

main/xiaozhi-server/core/utils/util.py

@@ -4,6 +4,7 @@ import yaml
 import socket
 import subprocess
 import logging
+import re
 
 
 def get_project_dir():
@@ -119,3 +120,11 @@ def check_ffmpeg_installed():
         error_msg += "1、按照项目的安装文档，正确进入conda环境\n"
         error_msg += "2、查阅安装文档，如何在conda环境中安装ffmpeg\n"
         raise ValueError(error_msg)
+    
+def extract_json_from_string(input_string):
+    """提取字符串中的 JSON 部分"""
+    pattern = r'(\{.*\})'
+    match = re.search(pattern, input_string)
+    if match:
+        return match.group(1)  # 返回提取的 JSON 字符串
+    return None