src/config.py

from pydantic_settings import BaseSettings
from typing import Optional

class Settings(BaseSettings):
    DATABASE_URL: str = "postgresql+asyncpg://user:password@localhost/mytodo_db"
    SECRET_KEY: str = "your-secret-key-must-be-changed-in-production"
    ALGORITHM: str = "HS256"
    ACCESS_TOKEN_EXPIRE_MINUTES: int = 30
    GEMINI_API_KEY: Optional[str] = None

    class Config:
        env_file = ".env"
        extra = "ignore"

settings = Settings()