The Edit History modal listed each version's full text with no indication
of what changed. Add a word-level diff: each edit highlights the words
added (green) and removed (struck-through red) relative to the previous
version, so a one-word fix is obvious at a glance.
- New pure, dependency-free diffWords (LCS over word/whitespace tokens) in
utils/textDiff.ts, with 8 unit tests (insert/delete/replace, whitespace
preserved, empty, no-mutation, word-not-char granularity).
- EditHistoryModal renders each edit via a DiffText component using
semantic <ins>/<del> (screen-reader-meaningful) styled with folds
Success/Critical tokens. A "Highlight changes" header toggle (default
on) switches back to full text, which keeps the rich formatted render;
the Original row is always the plain baseline.
- Diff is plain-text (body) only by design; formatted markup isn't diffed
(the toggle restores the rich view), and media/no-body edits diff as
empty strings gracefully.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
jaredandClaude Opus 4.8
961789fd71