pub fn open_subwindow(
state: &Arc<AppState>,
parent_instance_id: String,
) -> Result<Value, String>Expand description
Open a sub-window tied to parent_instance_id. Not exposed to users —
reserved for agent / backend callers that need a transient auxiliary
top-level window (tool-spawned panels, diff views, etc.). Sub-windows are
hidden from the taskbar via ITaskbarList::DeleteTab and close when their
parent full instance closes.