Function render_graph_lines 

pub fn render_graph_lines(
    view: &GraphView<'_>,
    selected_step_index: i64,
    now_ms: i64,
    node_style: GraphNodeStyle,
) -> Vec<String>

Render the graph to plain text lines (parity with the TS renderer with colors disabled). The TS reference infers “at latest” from the index, so this entry point does the same.