Envoyer des messages

async function sendMessage(channelId, content, options = {}) {
  const res = await fetch('https://gateway.alfychat.app/api/messages', {
    method: 'POST',
    headers: {
      'Authorization': `Bot ${process.env.BOT_TOKEN}`,
      'Content-Type': 'application/json',
    },
    body: JSON.stringify({ channelId, content, ...options }),
  });
  return res.json();
}

// Envoi simple
await sendMessage('channel-id', 'Bonjour !');

// En réponse à un message
await sendMessage('channel-id', 'Je te réponds !', { replyToId: 'msg-id' });

{
  "channelId":   "string",           // Obligatoire — ID du salon ou DM
  "content":     "string",           // Texte (1–2000 caractères)
  "replyToId":   "string | null",    // Optionnel — citer un message
  "attachments": ["url1", "url2"]    // Optionnel — liens médias hébergés
}

{
  "success": true,
  "message": {
    "id":        "m1a2b3c4-...",
    "content":   "Bonjour !",
    "channelId": "c1a2b3c4-...",
    "authorId":  "bot-id",
    "author":    { "id": "bot-id", "username": "MonBot", "isBot": true },
    "replyTo":   null,
    "createdAt": "2025-01-15T10:00:00.000Z"
  }
}