feat(v2.7): 接入协作治理前端体验

apps/web/lib/notification.test.ts

@@ -0,0 +1,20 @@
+import test from 'node:test';
+import assert from 'node:assert/strict';
+import { countUnreadNotifications, sortNotificationsNewestFirst } from './notification';
+
+test('countUnreadNotifications counts only rows without readAt', () => {
+  assert.equal(countUnreadNotifications([
+    { id: 'n-1', readAt: null } as any,
+    { id: 'n-2', readAt: '2026-07-08T08:00:00.000Z' } as any,
+    { id: 'n-3' } as any,
+  ]), 2);
+});
+
+test('sortNotificationsNewestFirst keeps newest createdAt first', () => {
+  const sorted = sortNotificationsNewestFirst([
+    { id: 'old', createdAt: '2026-07-07T08:00:00.000Z' } as any,
+    { id: 'new', createdAt: '2026-07-08T08:00:00.000Z' } as any,
+  ]);
+
+  assert.deepEqual(sorted.map((item) => item.id), ['new', 'old']);
+});