S3 + CloudFront Directory Indexer — 2026-06-30_v014

Browser-only hotfix/polish.

Changes from v013:
- Source begins with: // Build: 2026-06-30-v014
- Column sorting uses data-sort-key instead of fragile href parsing.
- Active arrows update correctly for Name, Last modified, and Size.
- aria-sort updates correctly as sorting changes.
- Page margins are fixed at 24px left/right across desktop/tablet/phone instead of changing with window width.
- TOOLS still stays open while testing options.
- Safe query-string handling remains.

Use:
- Upload s3-cloudfront-indexer-simple-2026-06-30_v014-lambda-edge-directory-browser-upload.zip to the Lambda@Edge directory browser.
- Deploy $LATEST.
- Publish a new numbered version.
- Attach that numbered version ARN to CloudFront Default (*) Origin request.