[Bug] Validation Error: invalid_type for exchange field on WSL Arch (Node v25)

[WillHoooo]

Description:
I encountered a validation error when attempting to configure the Binance Testnet. Even though the configuration seems correct, the application fails to recognize the exchange field, returning an undefined value during the schema validation.

Error Msg:
[ { "expected": "string", "code": "invalid_type", "path": [ "exchange" ], "message": "Invalid input: expected string, received undefined" } ]

Environment:
OS: Arch Linux (WSL2)
OpenAlice Version: 0.9.0-beta.8
Node.js: 25.7.0
NPM: 11.10.1

Package Manager: pnpm
Screenshot:

[WillHoooo]

The CCXT broker requires an exchange field (a required select in the schema). When you picked the CCXT account type, brokerConfig was initialized only from fields that had an explicit default in metadata (e.g. sandbox, demoTrading). exchange has no default, so it was never written into state.

The connection step uses a controlled . With value="" (because exchange was missing), the browser often visually shows the first option, but React state stays empty until the user actually changes the selection—onChange does not run for that initial display. So brokerConfig.exchange remained undefined, and the server’s Zod validation correctly failed with expected string, received undefined for exchange.