[
  {"id": "b01", "title": "Review draft", "due_at": "2026-10-30T16:30:00+00:00", "status": "open"},
  {"id": "b02", "title": "Update source note", "due_at": "2026-10-30T23:30:00+08:00", "status": "open"},
  {"id": "b03", "title": "Check article links", "due_at": "2026-10-31T09:00:00+08:00", "status": "done"},
  {"id": "b04", "title": "Prepare next issue", "due_at": "2026-10-31T16:10:00+00:00", "status": "open"},
  {"id": "b05", "title": "Unscheduled idea", "due_at": null, "status": "open"}
]