{
  "id": "mermaid-png-download",
  "name": "mermaid-png-download",
  "title": "Mermaid 下载默认 2 倍 PNG 图片",
  "description": "气泡 Mermaid 下载 PNG 图片，默认宽高为图表固有尺寸的 2 倍。",
  "status": "completed",
  "dev_type": "frontend",
  "scope": "mermaid-export",
  "package": null,
  "priority": "P2",
  "creator": "shiyue",
  "assignee": "shiyue",
  "createdAt": "2026-10-10",
  "completedAt": "2026-10-10",
  "branch": null,
  "base_branch": "main",
  "worktree_path": null,
  "commit": null,
  "pr_url": null,
  "subtasks": [],
  "children": [],
  "parent": null,
  "relatedFiles": ["public/app.js"],
  "notes": "PNG 下载默认 2 倍；Firefox 156.0 验证流程图、时序图、中文换行标签，格式与尺寸通过；语法和差异空白检查通过。",
  "meta": {}
}