feat(properties): dimension style-derived property groups

Resolve a dimension's DimStyle from the document and inject its full spec
groups — Lines & Arrows, Text, Fit, Primary Units, Alternate Units,
Tolerances — mirroring the ~80 dimension variables (dimasz, dimclrd, dimtxt,
dimdec, dimtol, dimzin bit flags, …) as read-only rows. The panel already had
doc access for the dim-style picker; extend it to append style_sections(style)
after the dimension's own Misc/Geometry groups.

Co-Authored-By: Claude Opus 4.8 <[email protected]>

src/app/properties.rs

@@ -179,8 +179,8 @@ impl OpenCADStudio {
                         }
                     }
 
-                    // Inject DimStyle picker for Dimension entities.
-                    if let acadrust::EntityType::Dimension(_) = entity {
+                    // Inject DimStyle picker + style-derived groups for Dimensions.
+                    if let acadrust::EntityType::Dimension(d) = entity {
                         let dim_style_names: Vec<String> = self.tabs[i]
                             .scene
                             .document
@@ -208,6 +208,19 @@ impl OpenCADStudio {
                                 }
                             }
                         }
+
+                        // Append the resolved dimension style's groups
+                        // (Lines & Arrows, Text, Fit, Units, Tolerances).
+                        let style_name = d.base().style_name.clone();
+                        if let Some(style) =
+                            self.tabs[i].scene.document.dim_styles.iter().find(|s| {
+                                s.name.eq_ignore_ascii_case(&style_name)
+                                    || (style_name.trim().is_empty()
+                                        && s.name.eq_ignore_ascii_case("Standard"))
+                            })
+                        {
+                            sections.extend(crate::entities::dimension::style_sections(style));
+                        }
                     }
 
                     // Block attributes: expose each attribute tag as an