@WebSocketGateway({

  cors: { origin: '*' },
  allowEIO3: true, // ngx-socket-io/socket.io-client in dp-ui is pinned at v2.5.0 (Engine.IO v3); this Nest gateway runs socket.io v4, which rejects EIO3 handshakes unless explicitly allowed.
})

CLAUDE.md

@@ -65,7 +65,7 @@ Route table (`${serviceId}:${operation}`):
 | `History:getAll` | — | Query SQLite (last 50), emit array response |
 | `History:delete` | `{ archiveId: string }` | Delete record + disk image, emit `{ deleted: boolean }` |
 | `History:clearAll` | — | Wipe all records + images, emit `{ deleted: number }` |
-| `Chat:send` | `{ message: string }` | POST to `N8N_WEBHOOK_URL` server-to-server, unwrap array to first element, emit response |
+| `Chat:send` | `{ message: string }` | POST to `N8N_WEBHOOK_URL` server-to-server; normalizes the reply into `{ text, has_visuals, visual_data }` (unwraps array/`output`/fenced-JSON string shapes from the n8n agent) and emits it |
 | `Chat:clear` | — | Generate new session UUID, emit `{ status: 'success' }` |
 | `PalmHistory:GetImage` | `{ archiveId: string }` | Load image from disk, encode to Base64 data URL, emit response |
 | `Surveillance:SubscribeTelemetry` | — | Join `telemetry-room`; immediately push latest snapshot; reply `{ status: 'subscribed' }` |