transmittal/js/validation.js had no in-browser coverage. Add a spec for
both halves: the live #tracking-number aria-invalid binding (whitespace /
underscore) and validateBeforePublish() — a clean transmittal passes; a
tracking number with spaces/underscores fails and focuses the field; a
per-file bad tracking number or revision is flagged by row.
(The earlier audit's "transmittal is untested" was inaccurate — it already
has paste/FS round-trip, drag-drop, and init-state specs; this fills the
validation gap none of them covered.)
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
