feat(properties): add 3D Visualization group + General Plot style/Hyperlink

Per the COMMON section of PROPERTIES.md. Insert a "3D Visualization" group
(Material, Shadow display) after General for every graphical object, and add
Plot style + Hyperlink rows to General. Material / plot style / shadow are
sourced from the entity's flags (ByLayer / ByBlock / custom); resolving a
custom material or plot-style handle to its name, and reading the hyperlink
from XDATA, are follow-ups that need document access.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/scene/cache/properties.rs

@@ -39,6 +39,18 @@ pub fn general_section(entity: &EntityType) -> PropSection {
                 field: "linetype_scale",
                 value: PropValue::EditText(format!("{:.4}", common.linetype_scale)),
             },
+            Property {
+                label: "Plot style".into(),
+                field: "plot_style",
+                value: PropValue::ReadOnly(
+                    match common.plotstyle_flags {
+                        0 => "ByLayer",
+                        1 => "ByBlock",
+                        _ => "ByColor",
+                    }
+                    .into(),
+                ),
+            },
             Property {
                 label: "Lineweight".into(),
                 field: "lineweight",
@@ -49,6 +61,11 @@ pub fn general_section(entity: &EntityType) -> PropSection {
                 field: "transparency",
                 value: PropValue::EditText(format!("{transp_pct}")),
             },
+            Property {
+                label: "Hyperlink".into(),
+                field: "hyperlink",
+                value: PropValue::ReadOnly(String::new()),
+            },
             Property {
                 label: "Invisible".into(),
                 field: "invisible",
@@ -61,6 +78,48 @@ pub fn general_section(entity: &EntityType) -> PropSection {
     }
 }
 
+/// The "3D Visualization" group (Material + Shadow display), common to every
+/// graphical object. Material / plot-style / shadow source is flag-based; a
+/// custom material handle is shown as "Custom" (name resolution needs the doc).
+pub fn visualization_section(entity: &EntityType) -> Option<PropSection> {
+    if matches!(
+        entity,
+        EntityType::Block(_)
+            | EntityType::BlockEnd(_)
+            | EntityType::Seqend(_)
+            | EntityType::Unknown(_)
+    ) {
+        return None;
+    }
+    let common = entity.common();
+    let material = match common.material_flags {
+        0 => "ByLayer",
+        1 => "ByBlock",
+        _ => "Custom",
+    };
+    let shadow = match common.shadow_flags {
+        0 => "Casts and Receives Shadows",
+        1 => "Casts Shadows",
+        2 => "Receives Shadows",
+        _ => "Ignores Shadows",
+    };
+    Some(PropSection {
+        title: "3D Visualization".into(),
+        props: vec![
+            Property {
+                label: "Material".into(),
+                field: "material",
+                value: PropValue::ReadOnly(material.into()),
+            },
+            Property {
+                label: "Shadow display".into(),
+                field: "shadow_display",
+                value: PropValue::ReadOnly(shadow.into()),
+            },
+        ],
+    })
+}
+
 pub fn fallback_properties(_handle: Handle, entity: &EntityType) -> PropSection {
     PropSection {
         title: "Geometry".into(),

src/scene/view/dispatch.rs

@@ -18,6 +18,9 @@ pub fn properties_sectioned(
     text_style_names: &[String],
 ) -> Vec<PropSection> {
     let mut sections = vec![properties::general_section(entity)];
+    if let Some(viz) = properties::visualization_section(entity) {
+        sections.push(viz);
+    }
     let groups = entity.geometry_properties(text_style_names);
     if groups.is_empty() {
         sections.push(properties::fallback_properties(handle, entity));