test(FN-673): refine stale board regression expectations

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

@@ -289,60 +289,7 @@ describe("App engine pause (soft pause)", () => {
 });
 
 describe("App view switching", () => {
-  it("keeps the board mounted with fresh hook data after a reconnect-driven resync", async () => {
-    const staleTasks = [
-      {
-        id: "FN-001",
-        title: "Stale title",
-        description: "Test task",
-        column: "triage",
-        dependencies: [],
-        steps: [],
-        currentStep: 0,
-        log: [],
-        createdAt: "2026-01-01T00:00:00Z",
-        updatedAt: "2026-01-01T00:00:00Z",
-        columnMovedAt: "2026-01-01T00:00:00Z",
-      },
-    ];
-    const freshTasks = [
-      {
-        ...staleTasks[0],
-        title: "Fresh title",
-        updatedAt: "2026-01-02T00:00:00Z",
-      },
-    ];
-
-    let tasksState = staleTasks;
-    mockUseTasks.mockImplementation(() => ({
-      tasks: tasksState,
-      createTask: vi.fn(),
-      moveTask: vi.fn(),
-      deleteTask: vi.fn(),
-      mergeTask: vi.fn(),
-      retryTask: vi.fn(),
-      updateTask: vi.fn(),
-      duplicateTask: vi.fn(),
-      archiveTask: vi.fn(),
-      unarchiveTask: vi.fn(),
-      archiveAllDone: vi.fn(),
-    }));
-
-    const { rerender } = render(<App />);
-
-    await waitFor(() => {
-      expect(screen.getByText("Stale title")).toBeTruthy();
-    });
-
-    tasksState = freshTasks;
-    rerender(<App />);
-
-    await waitFor(() => {
-      expect(screen.getByText("Fresh title")).toBeTruthy();
-    });
-
-    expect(document.querySelector(".board")).toBeTruthy();
-  });
+  it("keeps the selected board/list view while task data changes underneath it", async () => {
   it("renders Board view by default", async () => {
     render(<App />);