fix(color): show color book identity

src/scene/model/object.rs

@@ -30,6 +30,8 @@ pub enum PropValue {
     },
     /// ACI/RGB/ByLayer/ByBlock color — rendered as a color picker.
     ColorChoice(AcadColor),
+    /// Color-book color with its file-provided display name.
+    NamedColorChoice { color: AcadColor, name: String },
     /// Color varies across the current multi-selection.
     ColorVaries,
     /// Line weight — rendered as a combo_box.