[Bug] Can't run JS on Linux

The extension works fine on Windows but haven't been working since I switched to linux

```
/bin/sh: line 1: node: command not found

[Done] exited with code=127 in 0.02 seconds
```

Start by reproducing the reported Linux run, where the shell returns “node: command not found,” and inspect how the extension launches JavaScript. The payload names no source files or tests, so identify the relevant runner entry point and establish whether the expected outcome is a clearer setup requirement or a change to execution behavior.

Written by the indexing model from the issue text.