Reintroduces the §8.10 inline tracked-change layer Phase 1 dropped when
Tiptap left, this time anchored to the rendered preview rather than a
writable editor. Each accepted change on the branch decorates the
preview DOM with a `<span class="tracked-insert">` at the proposed text
and a `<span class="tracked-delete">` strikethrough for the original;
hover surfaces the same ChangeTooltip DiffView uses (badge + prompt +
quote + reason), now extracted to its own file so both surfaces share
the affordance.
Design calls per the Phase 3 prompt's open list:
• Contribute pane: default-on. The pane exists for editorial review
of your own work; the overlay reinforces that.
• Discuss pane: opt-in via a new "Show tracked changes" toolbar
toggle on non-main branches. Clean prose stays the default.
• DiffView's "Review changes" toolbar is untouched — DiffView dies in
Phase 7 and overloading its toggle now creates surface to unwind.
Pre-fancy stance on the known overlay subtleties:
• Drift — if `proposed` no longer appears verbatim (later manual
edit touched it) we skip the decoration rather than mis-anchor.
• Overlap — decorate in `acted_at` ascending order; later spans win
on whatever text is still un-wrapped.
• Mermaid — text nodes inside `.mermaid-block` are skipped; a tracked
span that intersects diagram source drops silently. Flagged as a
known limitation rather than worked around.
• Code — `<pre>`/`<code>` parents skipped too; matching inside
verbatim code produced noisy false positives in fixtures.
Backend tests: 125 passed. Helper verified via Vite preview sandbox
eval across eight cases (single-paragraph match, distinct-original
strike, no-match skip, mermaid skip, two-change overlap ordering,
declined/pending ignored, whitespace-normalized cross-newline match,
code-block skip), plus computed-style proof for the new
`.markdown-preview .tracked-insert` / `.tracked-delete` rules. The
end-to-end CM6 → accept → overlay flow against a live branch wasn't
exercised (backend not running this session); the simpler unit-level
verification looked clean, but a future session with the backend up
should drive that golden path before Phase 4 piles on top.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Ben Stull
2a7c099a33