Function reveal_block 

pub(crate) async fn reveal_block(
    state: &AppState,
    r: &Arc<Router>,
    block_id: String,
) -> Result<BlockRevealResult, String>

block.reveal: resolve the block’s tab and open window like a toast click, make the block its pane’s visible tab in the STORED layout (so a window that loads the tab fresh already shows it), then tell only that window’s renderer to reveal it (block:reveal). A workspace open in no window is out of scope: found: false, nothing changed.