[
  {
    "id": 1,
    "title": "HoloLake 2.0 发布！",
    "content": "全新界面，极致体验。",
    "channel": "tech",
    "pinned": true
  },
  {
    "id": 2,
    "title": "AI 会议延期通知",
    "content": "原定下周的会议推迟到月底。",
    "channel": "news",
    "pinned": false
  },
  {
    "id": 3,
    "title": "VS Code 插件推荐",
    "content": "Live Server 是开发神器。",
    "channel": "tech",
    "pinned": false
  }
]