fn queue_source_layout_delete(
store: &WaveStore,
source_tab_id: &str,
block_id: &str,
) -> Result<(), Box<dyn Error>>Expand description
Phase E.5.5 — append a layout-delete action to the source tab’s
LayoutState.pendingbackendactions so the source window’s
frontend tears the moved block out of its layout tree on next
poll. Mirrors the action-queueing portion of
wcore::tear_off_block. Layout migration is E.4.