ReferenceError: Can't find variable: currentInset

## Error

```
Can't find variable: currentInset
```

## Stack trace

```
/tracks/jq:486 in init
/tracks/jq:503 in global code
```

## Tracking Details
- **Project**: exercism-js
- **Sentry**: [ReferenceError: Can't find variable: currentInset](https://thalamus-ai.sentry.io/issues/146250097/)
- **Culprit**: init(tracks/jq)
- **First seen:** Sep 10, 2026

Start by inspecting the init function around lines 486 and 503 of tracks/jq, using the provided stack trace and Sentry report to trace the currentInset reference. Done means the exercism-js jq track no longer raises this ReferenceError during initialization and the relevant behavior is verified.

Written by the indexing model from the issue text.