{
  "items": [
    {
      "id": "first_session",
      "title": "首战告捷",
      "description": "完成第 1 次完整训练",
      "unlocked": true,
      "unlocked_at": "2026-09-30T12:00:00Z",
      "progress": 1,
      "target": 1,
      "icon": "trophy"
    },
    {
      "id": "conclusion_first_x3",
      "title": "先说结论 ×3",
      "description": "3 次做到「先说结论」",
      "unlocked": false,
      "unlocked_at": null,
      "progress": 1,
      "target": 3,
      "icon": "target"
    },
    {
      "id": "streak_3",
      "title": "连续 3 天",
      "description": "连续 3 天完成训练",
      "unlocked": true,
      "unlocked_at": "2026-09-30T12:00:00Z",
      "progress": 3,
      "target": 3,
      "icon": "flame"
    },
    {
      "id": "streak_7",
      "title": "连续 7 天",
      "description": "连续 7 天完成训练",
      "unlocked": true,
      "unlocked_at": "2026-09-30T12:00:00Z",
      "progress": 7,
      "target": 7,
      "icon": "flame"
    },
    {
      "id": "sessions_10",
      "title": "10 次训练",
      "description": "累计完成 10 次训练",
      "unlocked": true,
      "unlocked_at": "2026-09-30T12:00:00Z",
      "progress": 10,
      "target": 10,
      "icon": "star"
    },
    {
      "id": "efficiency_plus_10",
      "title": "效率 +10",
      "description": "单次训练表达效率提升 10 分",
      "unlocked": true,
      "unlocked_at": "2026-09-30T12:00:00Z",
      "progress": 1,
      "target": 1,
      "icon": "bolt"
    },
    {
      "id": "compress_success_x5",
      "title": "压缩成功 ×5",
      "description": "5 次压缩后更短且要点不丢",
      "unlocked": false,
      "unlocked_at": null,
      "progress": 4,
      "target": 5,
      "icon": "scissors"
    }
  ]
}