Accessible Form Error Summary & Focus Manager

Listing code: GCD-WEB-011 · Version: 1.0.1

1. Read README.md completely.
2. Run npm test; expect 12 passing tests and zero failures.
3. Copy src/accessible-form-error-summary.js into an authorized test environment.
4. Connect trusted validation errors to fields with unique IDs.
5. Complete the keyboard, screen-reader, server-validation, and rollback checklist in the README before production.

The helper does not style forms, validate untrusted submissions, or replace server-side validation. Save a rollback checkpoint before installation.