test(web): anchor the group section above the HoverCard wrapper

The workspace header row is now wrapped by its HoverCard anchor span
(0b4a6196f), so the row's immediate parent no longer holds the session
subtree; the delete scenario anchors on the groupSection ancestor
instead. The flat-view and dwell failures were downstream of this one
(shared page state).

apps/web/tests/workspace-management.e2e.ts

@@ -180,7 +180,9 @@ describe('web e2e: workspace management (create / rename / flat view / hover car
     // current selection while it moves into Ungrouped.
     const groupRow = page.locator('[role="treeitem"]').filter({ hasText: workspace.title }).first()
     await groupRow.waitFor({ timeout: 10_000 })
-    const groupSection = groupRow.locator('..')
+    // The header row is wrapped by its HoverCard anchor span, so the section
+    // is the nearest groupSection ancestor, not the immediate parent.
+    const groupSection = groupRow.locator('xpath=ancestor::*[contains(@class, "groupSection")][1]')
     if (await groupSection.locator('[role="treeitem"]').count() < 2) await groupRow.click()
     await expect.poll(
       () => groupSection.locator('[role="treeitem"]').count(),