Phonetic Guide: ruby text (furigana, pinyin) over base text (#296)

* Phonetic Guide: ruby text over base text (#288)

Home › Font › Phonetic Guide (format.phonetic) sets small ruby text
(furigana, pinyin) over the selected text. The ruby is one inline object
anchored at U+FFFC whose plain text is the base, so selection and the
caret treat it as one unit and exports read the base text.

- Model: InlineObject::Ruby with base, ruby, alignment (ECMA-376
  ST_RubyAlign), ruby size, raise, base size, language and the ruby's own
  formatting.
- Layout: the base is drawn in its run's formatting, the ruby above it by
  alignment (centre, distribute letters/space, left, right); the wider of
  the two sets the width and the line grows to fit the ruby. Drawn in the
  shared display list, so screen and PDF both show it.
- DOCX: w:ruby read and written with w:rubyPr (rubyAlign, hps, hpsRaise,
  hpsBaseText, lid), w:rt and w:rubyBase runs with their formatting.
  Previously only the base text was kept.
- Command format.phonetic {"ruby", "align"?, "size"?, "offset"?}: sets,
  edits or (null/"") removes the ruby, undoable; without "ruby" it opens
  the dialog and returns the selection's phonetic guide.
- UI: Phonetic Guide button in Home › Font and a dialog (base text, ruby
  text, alignment, offset, size, Remove), strings in every catalog.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

* Merge fix: keep both sides' tests

---------

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

docs/parity-checklist.md

@@ -2,13 +2,13 @@
 
 Generated by `cargo xtask parity` (`wordcraft-cli parity --markdown`): the word-processor feature catalog (`crates/engine/src/catalog.rs`) compared with the live command registry.
 
-**418 of 448 catalog features have commands (93.3%).**
+**419 of 448 catalog features have commands (93.5%).**
 
 | Tab | Live | Total |
 |---|---|---|
 | File | 20 | 20 |
 | Quick Access | 4 | 4 |
-| Home | 99 | 102 |
+| Home | 100 | 102 |
 | Insert | 43 | 53 |
 | Draw | 5 | 11 |
 | Design | 10 | 10 |
@@ -30,7 +30,6 @@ Generated by `cargo xtask parity` (`wordcraft-cli parity --markdown`): the word-
 
 ### Home
 
-- Font › Phonetic Guide (`format.phonetic`)
 - Font › Enclose Characters (`format.enclose`)
 - Voice › Dictate (`tools.dictate`)