Function selectOrAddTab

src/browser/utils/rightSidebarLayout.ts:563–573

(
  state: RightSidebarLayoutState,
  tab: TabType
)

 * Select an existing tab anywhere in the layout, or add it to the focused tabset if missing.
 */
export function selectOrAddTab(
  state: RightSidebarLayoutState,
  tab: TabType
): RightSidebarLayoutState {
  const found = collectAllTabsWithTabset(state.root).find((t) => t.tab === tab);
  if (found) {
    return selectTabInTabset(setFocusedTabset(state, found.tabsetId), found.tabsetId, found.tab);
  }

  return addTabToFocusedTabset(state, tab);
}

/**
 * Move a tab from one tabset to another.