Conversations API

GET /notebooks/:notebookId/conversations

{
  "data": [
    {
      "id": "conv_123",
      "title": "Research Questions",
      "messageCount": 12,
      "createdAt": "2024-01-15T10:30:00Z",
      "updatedAt": "2024-01-20T14:45:00Z"
    }
  ]
}

POST /notebooks/:notebookId/conversations

{
  "title": "Research Questions"
}

{
  "data": {
    "id": "conv_456",
    "title": "Research Questions",
    "createdAt": "2024-01-21T09:00:00Z"
  }
}

POST /conversations/:conversationId/messages

{
  "content": "What are the key findings from my sources?"
}

{
  "data": {
    "id": "msg_123",
    "role": "assistant",
    "content": "Based on your sources, the key findings are...",
    "citations": [
      {
        "sourceId": "src_456",
        "text": "...",
        "page": 12
      }
    ],
    "creditsUsed": 2
  }
}

{
  "content": "Summarize this document",
  "stream": true
}

GET /conversations/:conversationId/messages

{
  "data": [
    {
      "id": "msg_001",
      "role": "user",
      "content": "What is the main topic?",
      "createdAt": "2024-01-15T10:30:00Z"
    },
    {
      "id": "msg_002",
      "role": "assistant",
      "content": "The main topic is...",
      "citations": [...],
      "createdAt": "2024-01-15T10:30:05Z"
    }
  ]
}