feat(workbench): refine dynamic task collaboration

src/features/workbench/hooks/use-workbench-sync.test.ts

@@ -0,0 +1,31 @@
+import { describe, expect, it } from "vitest";
+import { shouldApplyWorkbenchSnapshot } from "./use-workbench-sync";
+
+describe("workbench snapshot ordering", () => {
+  it("rejects an older concurrent response even when its cursor is valid", () => {
+    expect(shouldApplyWorkbenchSnapshot({
+      requestGeneration: 1,
+      latestRequestGeneration: 2,
+      eventCursor: 120,
+      currentCursor: 100
+    })).toBe(false);
+  });
+
+  it("rejects a snapshot whose cursor trails already consumed events", () => {
+    expect(shouldApplyWorkbenchSnapshot({
+      requestGeneration: 2,
+      latestRequestGeneration: 2,
+      eventCursor: 99,
+      currentCursor: 100
+    })).toBe(false);
+  });
+
+  it("accepts only the latest response without cursor rollback", () => {
+    expect(shouldApplyWorkbenchSnapshot({
+      requestGeneration: 2,
+      latestRequestGeneration: 2,
+      eventCursor: 100,
+      currentCursor: 100
+    })).toBe(true);
+  });
+});