Function armory_target 

fn armory_target(
    section: Option<&str>,
    subsection: Option<&str>,
) -> (&'static str, &'static str)

Where a saved Armory pane goes, by its section (and, for the old Memory section, its Global/Personal subsection): its pane, connectors or memory, and that pane’s section. The same mapping m0037_retire_old_pane_names.rs applied to stored blocks; layout files live outside AgentMux, so their import still needs it.