[错误] 自 0.19.0 起, "Playground 测试"面板显示"未找到测试": requestCollectTests 返回一个空树

#!/usr/bin/env bash
# Usage: ./repro.sh <toolchain-version> [port]
# Creates a two-test project pinned to <toolchain-version>, lists tests with the CLI,
# then starts the baml playground with --no-open and asks the server for the test tree over /api/ws, the same message the Tests panel sends. It needs Node 22 or newer for the global WebSocket.