Function save_session_json

tutorials/12_session_persistence.py:237–253

整文件 JSON 保存。 对应源码: session.rs:88-91 pub fn save_to_path(&self, path) -> Result<(), SessionError> { fs::write(path, self.to_json().render())?; Ok(()) }

(session: Session, path: str)

# 这是 Rust 源码中实际实现的方式（简单但有局限）

def save_session_json(session: Session, path: str):
    """
    整文件 JSON 保存。

    对应源码: session.rs:88-91
        pub fn save_to_path(&self, path) -> Result<(), SessionError> {
            fs::write(path, self.to_json().render())?;
            Ok(())
        }
    """
    data = {
        "version": session.version,
        "session_id": session.session_id,
        "messages": [m.to_dict() for m in session.messages],
    }
    with open(path, "w") as f:
        json.dump(data, f, indent=2, ensure_ascii=False)


def load_session_json(path: str) -> Session: