test: add 5 E2E scenarios for Node Library V2 sidebar

- Blueprints tab shows section headings (My/Comfy Blueprints)
- Drag node to canvas adds it to the graph
- Right-click node shows context menu with bookmark option
- Search clear restores folder view
- Sort alphabetical changes tree layout

browser_tests/tests/sidebar/nodeLibraryV2.spec.ts

@@ -67,4 +67,90 @@ test.describe('Node library sidebar V2', () => {
 
     await expect(tab.sortButton).toBeVisible()
   })
+
+  test('Blueprints tab shows section headings', async ({ comfyPage }) => {
+    const tab = comfyPage.menu.nodeLibraryTabV2
+
+    await tab.blueprintsTab.click()
+    await expect(tab.blueprintsTab).toHaveAttribute('aria-selected', 'true')
+
+    await expect(tab.sidebarContent.getByText('My Blueprints')).toBeVisible()
+    await expect(tab.sidebarContent.getByText('Comfy Blueprints')).toBeVisible()
+  })
+
+  test('Drag node to canvas adds it', async ({ comfyPage }) => {
+    const tab = comfyPage.menu.nodeLibraryTabV2
+
+    await tab.getFolder('sampling').click()
+    await expect(tab.getNode('KSampler (Advanced)')).toBeVisible()
+
+    const initialCount = await comfyPage.nodeOps.getGraphNodesCount()
+
+    const canvasBoundingBox = (await comfyPage.page
+      .locator('#graph-canvas')
+      .boundingBox())!
+    const targetPosition = {
+      x: canvasBoundingBox.x + canvasBoundingBox.width / 2,
+      y: canvasBoundingBox.y + canvasBoundingBox.height / 2
+    }
+
+    const nodeLocator = tab.getNode('KSampler (Advanced)')
+    await nodeLocator.dragTo(comfyPage.page.locator('#graph-canvas'), {
+      targetPosition
+    })
+
+    await expect
+      .poll(() => comfyPage.nodeOps.getGraphNodesCount(), { timeout: 5000 })
+      .toBe(initialCount + 1)
+  })
+
+  test('Right-click node shows context menu with bookmark option', async ({
+    comfyPage
+  }) => {
+    const tab = comfyPage.menu.nodeLibraryTabV2
+
+    await tab.getFolder('sampling').click()
+    const node = tab.getNode('KSampler (Advanced)')
+    await expect(node).toBeVisible()
+
+    await node.click({ button: 'right' })
+
+    const contextMenu = comfyPage.page.getByRole('menuitem', {
+      name: /Bookmark Node/
+    })
+    await expect(contextMenu).toBeVisible({ timeout: 3000 })
+  })
+
+  test('Search clear restores folder view', async ({ comfyPage }) => {
+    const tab = comfyPage.menu.nodeLibraryTabV2
+
+    await expect(tab.getFolder('sampling')).toBeVisible()
+
+    await tab.searchInput.click()
+    await tab.searchInput.fill('KSampler')
+    await expect(tab.getNode('KSampler (Advanced)')).toBeVisible({
+      timeout: 5000
+    })
+
+    await tab.searchInput.clear()
+    await tab.searchInput.press('Enter')
+
+    await expect(tab.getFolder('sampling')).toBeVisible({ timeout: 5000 })
+  })
+
+  test('Sort alphabetical changes tree layout', async ({ comfyPage }) => {
+    const tab = comfyPage.menu.nodeLibraryTabV2
+
+    await expect(tab.getFolder('sampling')).toBeVisible()
+
+    await tab.sortButton.click()
+
+    const alphabeticalOption = comfyPage.page.getByRole('menuitemradio', {
+      name: 'A-Z'
+    })
+    await expect(alphabeticalOption).toBeVisible({ timeout: 3000 })
+    await alphabeticalOption.click()
+
+    await expect(tab.getFolder('sampling')).not.toBeVisible({ timeout: 5000 })
+  })
 })