def test_image_is_served_from_frames_root(client, tmp_path):
    frames_root = tmp_path / "frames"
    frames_root.mkdir(parents=True, exist_ok=True)
    (frames_root / "hello.png").write_bytes(b"fake-png-bytes")

    resp = client.get("/images/hello.png")

    assert resp.status_code == 200
    assert resp.content == b"fake-png-bytes"


def test_missing_image_returns_404(client):
    resp = client.get("/images/does-not-exist.png")
    assert resp.status_code == 404