优化代码格式和异常处理

- 修复异常处理链，使用from语法保留原始异常
- 格式化代码以符合项目规范
- 优化导入模块的顺序

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

config/auto_update.py

@@ -3,34 +3,35 @@ import shutil
 import tomlkit
 from pathlib import Path
 
+
 def update_config():
     # 获取根目录路径
     root_dir = Path(__file__).parent.parent
     template_dir = root_dir / "template"
     config_dir = root_dir / "config"
-    
+
     # 定义文件路径
     template_path = template_dir / "bot_config_template.toml"
     old_config_path = config_dir / "bot_config.toml"
     new_config_path = config_dir / "bot_config.toml"
-    
+
     # 读取旧配置文件
     old_config = {}
     if old_config_path.exists():
         with open(old_config_path, "r", encoding="utf-8") as f:
             old_config = tomlkit.load(f)
-    
+
     # 删除旧的配置文件
     if old_config_path.exists():
         os.remove(old_config_path)
-    
+
     # 复制模板文件到配置目录
     shutil.copy2(template_path, new_config_path)
-    
+
     # 读取新配置文件
     with open(new_config_path, "r", encoding="utf-8") as f:
         new_config = tomlkit.load(f)
-    
+
     # 递归更新配置
     def update_dict(target, source):
         for key, value in source.items():
@@ -55,13 +56,14 @@ def update_config():
                     except (TypeError, ValueError):
                         # 如果转换失败，直接赋值
                         target[key] = value
-    
+
     # 将旧配置的值更新到新配置中
     update_dict(new_config, old_config)
-    
+
     # 保存更新后的配置（保留注释和格式）
     with open(new_config_path, "w", encoding="utf-8") as f:
         f.write(tomlkit.dumps(new_config))
 
+
 if __name__ == "__main__":
     update_config()