Refactor code structure for improved readability and maintainability

backend/app/config/__init__.py

@@ -1,4 +1,3 @@
-# src/config/__init__.py
 """配置模块"""
 
 from .settings import Settings, get_settings, settings

backend/app/config/logging.py

@@ -1,4 +1,3 @@
-# src/config/logging.py
 """日志配置"""
 
 from loguru import logger
@@ -29,4 +28,4 @@ def setup_logging(level: str = "INFO"):
         compression="zip"
     )
 
-    return logger
+    return logger

backend/app/config/settings.py

@@ -1,4 +1,3 @@
-# src/config/settings.py
 """配置管理 - 环境变量和默认配置"""
 
 from pydantic_settings import BaseSettings