Fix merge: Shape::math for WordArt, fmt

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

crates/engine/src/cmd/wordart.rs

@@ -190,6 +190,7 @@ fn insert_word_art(s: &mut Session, p: &Json) -> Result<Json> {
         line: Color::Auto,
         text: text.clone(),
         format: ShapeFormat { no_line: true, align: Some(ShapeTextAlign::Center), anchor: Some(ShapeTextAnchor::Middle), ..Default::default() },
+        math: Default::default(),
     };
     apply("insert.wordArt", &mut shape, Some(style), p)?;
     // Default box: the longest line at the font size (about 0.62 em per character) plus padding.

crates/ui-egui/src/objects.rs

@@ -126,7 +126,9 @@ pub fn open_action(sh: &Sheet, o: ObjRef) -> OpenAction {
     match o.kind {
         ObjKind::Chart => OpenAction::FormatChart(o.id),
         ObjKind::Equation => OpenAction::EditEquation(o.id),
-        ObjKind::Shape if sh.shapes.iter().any(|s| s.id == o.id && matches!(s.kind, ShapeKind::TextBox | ShapeKind::WordArt)) => OpenAction::EditText(o.id),
+        ObjKind::Shape if sh.shapes.iter().any(|s| s.id == o.id && matches!(s.kind, ShapeKind::TextBox | ShapeKind::WordArt)) => {
+            OpenAction::EditText(o.id)
+        }
         ObjKind::Shape | ObjKind::Image | ObjKind::Slicer => OpenAction::Select,
     }
 }