Update Convex with no payload to be just like convex with payload but without payload

apps/next/tests/unit/environment.test.ts

@@ -0,0 +1,7 @@
+import { describe, expect, it } from 'vitest';
+
+describe('unit test harness', () => {
+  it('executes isolated assertions', () => {
+    expect(1 + 1).toBe(2);
+  });
+});