FN-6156: rescue board workflow toolbar test

Rescue the dashboard board workflow toolbar coverage and rotate the active quarantine.

- wait for the workflow toolbar itself before asserting board workflow actions in Board.test.tsx
- remove Board.test.tsx from the dashboard vitest quarantine list
- quarantine WorkflowNodeEditor.test.tsx with an updated ledger entry for the newly observed flake

Files changed:
 packages/dashboard/app/components/__tests__/Board.test.tsx | 4 ++--
 packages/dashboard/vitest.config.ts                        | 4 +++-
 scripts/lib/test-quarantine.json                           | 4 ++--
 3 files changed, 7 insertions(+), 5 deletions(-)

Fusion-Task-Id: FN-6156

Fusion-Task-Lineage: c91c3542-fdec-426a-8e63-3edb3f5d34e5

packages/dashboard/app/components/__tests__/Board.test.tsx

@@ -1029,7 +1029,7 @@ describe("Board", () => {
       enableFlag({}, [DEFAULT_WORKFLOW]);
       const { unmount } = renderBoard({ onCreateWorkflow });
 
-      await waitFor(() => expect(screen.getByTestId("column-triage")).toBeDefined());
+      await waitFor(() => expect(document.querySelector(".board-workflow-toolbar")).not.toBeNull());
       expect(workflowToolbarActionNames()).toEqual(["New workflow"]);
       fireEvent.click(screen.getByRole("button", { name: "New workflow" }));
       expect(onCreateWorkflow).toHaveBeenCalledTimes(1);
@@ -1039,7 +1039,7 @@ describe("Board", () => {
       enableFlag({}, [DEFAULT_WORKFLOW]);
       renderBoard({ onOpenWorkflowEditor });
 
-      await waitFor(() => expect(screen.getByTestId("column-triage")).toBeDefined());
+      await waitFor(() => expect(document.querySelector(".board-workflow-toolbar")).not.toBeNull());
       expect(workflowToolbarActionNames()).toEqual(["Edit workflows"]);
       fireEvent.click(screen.getByRole("button", { name: "Edit workflows" }));
       expect(onOpenWorkflowEditor).toHaveBeenCalledTimes(1);

packages/dashboard/vitest.config.ts

@@ -231,7 +231,9 @@ const qualityAppComponentBatchBTests = buildComponentQualityInclude(batchedQuali
 const qualityAppAppOnlyTests = ["app/components/__tests__/App.test.tsx"];
 const qualityAppChatOnlyTests = ["app/components/__tests__/ChatView.test.tsx"];
 const qualityAppSettingsOnlyTests = ["app/components/__tests__/SettingsModal.test.tsx"];
-const quarantinedDashboardTests: string[] = ["app/components/__tests__/Board.test.tsx"];
+const quarantinedDashboardTests = [
+  "app/components/__tests__/WorkflowNodeEditor.test.tsx",
+];
 
 const qualityApiTests = [
   // Critical HTTP/server behavior: auth, task/project/settings mutation,

scripts/lib/test-quarantine.json

@@ -2,8 +2,8 @@
   "$comment": "Flaky-test quarantine ledger (deletion ratchet — see AGENTS.md 'Flaky tests: quarantine on sight' and docs/testing.md 'Quarantine ledger and the deletion ratchet'). A test observed failing without a corresponding real bug is quarantined ON SIGHT: add an entry here AND a matching one-line `exclude` entry in that package's vitest config, in the same commit. Every entry needs a non-empty `reason` (link the failing run) and a `quarantinedAt` date — the entry expires 14 days later, at which point the test file is DELETED unless someone rescues it with evidence it catches real regressions plus a root-cause fix (never appeasement). There is deliberately no loader module and no automation around this file: it is a dated record, the vitest config exclude is the mechanism, and the sweep is policy executed by whoever touches the suite.",
   "entries": [
     {
-      "file": "packages/dashboard/app/components/__tests__/Board.test.tsx",
-      "reason": "FN-6154 local pnpm test run on 2026-06-09 failed in 'Board > multi-lane board (U9, flag ON) > preserves workflow toolbar partial action visibility' with missing .board-workflow-toolbar; unrelated to WorkflowNodeEditor CSS max-height change.",
+      "file": "packages/dashboard/app/components/__tests__/WorkflowNodeEditor.test.tsx",
+      "reason": "FN-6156 broad pnpm test observed dashboard-app-quality-components-b flake: edits a code node source and timeout could not find Source (TypeScript) after clicking Code; unrelated to Board.test.tsx quarantine rescue.",
       "quarantinedAt": "2026-06-09"
     }
   ]