<!-- One focused change per PR. If the diff spans two unrelated concerns, split it. -->

## What

<!-- What does this change do? -->

## Why

<!-- Why is it needed? Link the issue it closes, e.g. Closes #123. -->

## How to verify

<!-- Commands or steps a reviewer can run. -->

```sh
swiftformat . --config .swiftformat --lint
swiftlint --config .swiftlint.yml --strict
swift build
swift test
bash scripts/check-wasm.sh
```

## Checklist

- [ ] Format, lint, build, test, and WASM gates pass.
- [ ] Code follows the conventions in `docs/CONVENTIONS.md`.
- [ ] `CHANGELOG.md` updated under `Unreleased` (or this change is docs/tests/config only).
- [ ] No AI attribution and no em dashes in commits, comments, or this description.