Function activeLeaf

packages/app-core/src/store.test.ts:692–696

(store: { paneLayout: PaneLayout; activePaneId: string })

describe('preview tabs (VS Code-style open flow)', () => {
  function activeLeaf(store: { paneLayout: PaneLayout; activePaneId: string }): PaneLeaf {
    const leaf = findLeaf(store.paneLayout, store.activePaneId)
    if (!leaf) throw new Error('no active leaf')
    return leaf
  }

  it('previews replace each other; a permanent re-open promotes the preview', async () => {
    const noteA = { ...makeNote('alpha'), path: 'inbox/A.md', title: 'A' }