"""从 backend/.env 加载环境变量（供联调脚本使用）"""

from pathlib import Path


def load_backend_env() -> dict[str, str]:
    env_path = Path(__file__).resolve().parent.parent / '.env'
    result: dict[str, str] = {}
    if not env_path.exists():
        return result
    for line in env_path.read_text(encoding='utf-8').splitlines():
        line = line.strip()
        if not line or line.startswith('#') or '=' not in line:
            continue
        key, _, value = line.partition('=')
        result[key.strip()] = value.strip()
    return result