Track Changes: moves (w:moveFrom/w:moveTo) (#400) (#404)

Moved text is tracked as a move instead of a deletion plus an insertion:
- Model: Revision::move_name links the source (a deletion revision) and
  the destination (an insertion revision) of a move; runs and paragraph
  marks keep using ins/del, so everything that hides deletions or exports
  the result treats the moved-away text like a deletion.
- DOCX: w:moveFrom / w:moveTo inside w:moveFromRangeStart/End and
  w:moveToRangeStart/End (ECMA-376 17.13.5.21-28) are read as linked moves,
  paragraph marks included; on save the ranges are written around each
  moved stretch with the move's name, author and date, moved-away text in
  w:t. A move missing an end, or whose range never ends, opens as a plain
  deletion and insertion.
- Recording: with Track Changes on, a cut of a paragraph or at least a
  sentence gets a revision of its own; pasting it right after makes both
  a move (pasted paragraph marks are tracked as inserted too).
- Accept/Reject at either end resolves both; the Reviewing Pane lists
  moveFrom/moveTo with the move name and "Moved from"/"Moved to".
- Markup: green, double strikethrough at the source and double underline
  at the destination; "Moved from"/"Moved to" balloons.

Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
Co-authored-by: Brandon Thomas <echelon@gmail.com>

docs/gaps.md

@@ -15,7 +15,7 @@ first (`gh pr list`), and update this file and the parity doc when a gap closes.
 | 2 | **Ink and drawing canvases are dropped on open and lost on save, silently**; OLE objects show only their picture | B | No ink or drawing-canvas (`wpc`) handling in `crates/docx`; group shapes (`wpg`) read and written (#267). Charts and SmartArt are drawn (#292) and, with OLE objects, written back with all their parts on save (#319) | Documents with diagrams drawn in Word or pen notes lose content without warning | 4–8 to preserve ink and drawing canvases; 45–70 to render and edit charts and SmartArt (#13) | [file-format-parity.md](file-format-parity.md) |
 | 3 | **Crashes and freezes in the field**: startup crash on Intel UHD Graphics (#170) (lag on GPUs without a DirectX 12 driver fixed, #316), freezes (#77, #59 Thai fonts, #31 font selector), no writes without admin on Windows 11 (#218), broken shape tool (#142), images can't be moved (#82) | B | 62 open issues, ~15 of them crashes, hangs or data-path failures | Anyone hit loses work or trust; the never-crash standard covers panics, not hangs or GPU driver faults | 20–30 | [target-app-parity.md](target-app-parity.md) (Stability) |
 | 4 | **Pagination differs from Word**: Aptos has no metric-matched substitute; legacy compatibility options ignored; no page-by-page comparison harness | B | [layout-parity.md](layout-parity.md); [typing-parity.md](typing-parity.md) Known gaps | Page counts and line breaks differ, which matters for forms, legal and academic work | 30–50 + owner (font) | [layout-parity.md](layout-parity.md) |
-| 5 | **Move tracking and content controls** are lost (`w:moveFrom`/`w:moveTo` read as insert/delete; `w:sdt` unwrapped). Formatting revisions landed (#41): `w:rPrChange`/`w:pPrChange`/`w:tblPrChange`/`w:trPrChange`/`w:tcPrChange`/`w:sectPrChange`/`w:numberingChange` round-trip, are recorded while tracking, accepted/rejected and shown in balloons; still missing: tracked style-definition changes and table/section changes made in WordCraft | B | Issue #41; source grep | Legal and editorial review workflows; templates with form controls | 8–12 | [file-format-parity.md](file-format-parity.md) |
+| 5 | **Content controls** are lost (`w:sdt` unwrapped). Move tracking landed (#400): `w:moveFrom`/`w:moveTo` with their named ranges round-trip, a tracked cut and paste of a paragraph or sentence records a move, either end accepts/rejects both, green double strike/underline markup and "Moved from/to" balloons; still missing: drag-and-drop moves (no text drag yet) and move options in Track Changes Options. Formatting revisions landed (#41): `w:rPrChange`/`w:pPrChange`/`w:tblPrChange`/`w:trPrChange`/`w:tcPrChange`/`w:sectPrChange`/`w:numberingChange` round-trip, are recorded while tracking, accepted/rejected and shown in balloons; still missing: tracked style-definition changes and table/section changes made in WordCraft | B | Issues #41, #400; source grep | Legal and editorial review workflows; templates with form controls | 5–8 | [file-format-parity.md](file-format-parity.md) |
 | 6 | **No native printing** on desktop: File › Print opens the PDF in the system viewer, which prints (#286); no print dialog of our own (printer, copies, ranges); web prints through the browser (#209) | B | `ui.print` → `apps/wordcraft/src/print.rs`; issue #15 | Everyone who prints | 5–8 | [hardware-parity.md](hardware-parity.md) |
 | 7 | **Dialog depth**: 35 modal dialogs vs Word's ~100 (Caption, Index, TOC options, Citation, Compare, Protect, Language, Hyphenation, Line Numbers, Envelopes, Labels, AutoCorrect, Options panes…) | B | `Dialog` enum in `crates/ui-egui/src/dialogs.rs` | Power users reach for dialogs the ribbon alone doesn't cover | 20–30 | [ui-parity.md](ui-parity.md) |
 | 8 | **Proofing is English only**; no language per run, no dictionaries for other languages | | `crates/proof` has one dictionary; Word ships 120 proofing tools; issues #25, #40, #100 | Every non-English writer | 25–45 | [localization-parity.md](localization-parity.md) |
@@ -64,6 +64,7 @@ The same gaps grouped the way the parity documents are, for agents working in on
 
 | Date | Change | Summary |
 |---|---|---|
+| 2026-10-11 | trivial | Move tracking landed (#400); gap #5 narrowed to content controls, 5–8 h |
 | 2026-10-11 | trivial | #4: note options per section (below text, end of section, restart each section/page) and the Footnote and Endnote dialog (#385) |
 | 2026-10-11 | trivial | #10: Shape Format › Text: text direction, align text and linked text boxes (#369) |
 | 2026-10-11 | trivial | #16: right-to-left tables (`w:bidiVisual`) and sections (`w:bidi`) laid out mirrored, with `table.rtl` and `layout.sectionRtl` (#362) |