Function generate_continued_note 

pub(crate) async fn generate_continued_note(
    mstore: &Store,
    block_id: &str,
    generation: u64,
    record: &str,
) -> Option<String>

The note a pane shows once a fresh session continues its conversation from AgentMux’s record (backend::continued_note). Keyed on the block, so a newer spawn’s note supersedes an older one still in flight. Best-effort: every failure is None, and the pane says nothing.