Function update_me

backend/app/main.py:245–260

(
    payload: ParticipantUpdate,
    response: Response,
    participant=Cookie(default=None, alias=COOKIE_NAME),
)

@app.post("/api/me")
def update_me(
    payload: ParticipantUpdate,
    response: Response,
    participant=Cookie(default=None, alias=COOKIE_NAME),
) -> dict:
    current = get_or_create_participant(response, participant)
    nickname = payload.nickname.strip() or default_nickname(current["id"])
    with connect() as conn:
        conn.execute(
            "UPDATE participants SET nickname = ?, updated_at = ? WHERE id = ?",
            (nickname, now_iso(), current["id"]),
        )
        row = conn.execute(
            "SELECT * FROM participants WHERE id = ?", (current["id"],)
        ).fetchone()
    return {"participant": row_to_dict(row)}


@app.get("/api/challenges")