POST para este dashboard:
Array de objetos JSON:
[
  {
    "id": "conv_001",
    "name": "João Silva",
    "phone": "5521999998888",
    "lastMessage": "Aguardando...",
    "lastTime": "17:32",
    "msgCount": 3,
    "isPedro": false,
    "isGroup": false,
    "isUrgent": false,
    "hasAudio": false,
    "audioTranscription": "",
    "aiSummary": "Resumo gerado pelo Gemini",
    "messages": [
      {
        "from": "incoming",
        "text": "mensagem",
        "time": "17:30",
        "isAudio": false
      }
    ]
  }
]