pub(crate) async fn queue_target_stack_push(
state: &AppState,
tab_id: &str,
block_id: &str,
target_block_id: &str,
) -> Result<(), String>Expand description
Tell the frontend that block_id was added — already, in the reducer — as
the visible tab of the pane holding target_block_id
(Command::CreateBlockInStack). Matches
LayoutTreeActionType.StackPush = "stackpush" in
frontend/layout/lib/types.ts. SPEC_PANE_TABS_REDUCER_COMMANDS_2026_09_18.md §3.3.