pub(crate) fn owned_panes() -> Vec<String>Expand description
Every pane an agent owns. The host keeps a copy, to decide inside
on_before_popup which of a pane’s popups open in-app
(SPEC_BROWSER_PANE_NATIVE_POPUPS_AGENT_DRIVEN_2026_10_08.md §3); it is
only a hint there, since who may drive what is always checked here.