add backend source code

backend/app/core/config.py

@@ -0,0 +1,46 @@
+"""
+系统配置模块
+"""
+from pydantic_settings import BaseSettings
+from typing import Optional
+from functools import lru_cache
+
+
+class Settings(BaseSettings):
+    """系统配置"""
+    
+    # 应用配置
+    APP_NAME: str = "医院绩效考核管理系统"
+    APP_VERSION: str = "1.0.0"
+    DEBUG: bool = True
+    API_PREFIX: str = "/api/v1"
+    
+    # 数据库配置
+    DATABASE_URL: str = "postgresql+asyncpg://postgres:postgres@localhost:5432/hospital_performance"
+    DATABASE_POOL_SIZE: int = 20
+    DATABASE_MAX_OVERFLOW: int = 10
+    
+    # JWT配置
+    SECRET_KEY: str = "your-secret-key-change-in-production-min-32-chars"
+    ALGORITHM: str = "HS256"
+    ACCESS_TOKEN_EXPIRE_MINUTES: int = 60 * 8  # 8小时
+    
+    # 跨域配置
+    CORS_ORIGINS: list[str] = ["http://localhost:3000", "http://localhost:5173"]
+    
+    # 分页配置
+    DEFAULT_PAGE_SIZE: int = 20
+    MAX_PAGE_SIZE: int = 100
+    
+    class Config:
+        env_file = ".env"
+        case_sensitive = True
+
+
+@lru_cache()
+def get_settings() -> Settings:
+    """获取配置单例"""
+    return Settings()
+
+
+settings = get_settings()