{
  "announcements": [
    {
      "id": "2026-04-08-issue-feedback",
      "enabled": true,
      "level": "info",
      "title": "问题反馈",
      "message": "如有问题请 issue 反馈",
      "dismissible": false,
      "published_at": "2026-04-08T11:00:00+08:00",
      "start_at": "2026-04-08T11:00:00+08:00",
      "end_at": ""
    },
    {
      "id": "2026-04-08-dashboard-announcement",
      "enabled": true,
      "level": "info",
      "title": "系统公告",
      "message": "这是第一条公告",
      "dismissible": true,
      "published_at": "2026-04-08T10:30:00+08:00",
      "start_at": "2026-04-08T10:30:00+08:00",
      "end_at": "2026-04-08T10:59:59+08:00"
    },
    {
      "id": "2026-04-07-dashboard-history-test",
      "enabled": true,
      "level": "warning",
      "title": "历史公告测试",
      "message": "历史公告测试",
      "dismissible": true,
      "published_at": "2026-04-07T10:00:00+08:00",
      "start_at": "2026-04-07T10:00:00+08:00",
      "end_at": "2026-04-07T23:59:59+08:00"
    }
  ]
}