fix(properties): recolour solid meshes on a colour/layer change

ACIS solids bake their colour into the mesh, so a property-panel or ribbon
colour (or layer) change left the solid showing its old colour — only the
wires, which resolve colour at render time, updated. Run recolor_meshes
(now covering block-definition meshes too) when property targets are
invalidated, and route the ribbon colour change through the same path.

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

src/app/properties.rs

@@ -478,6 +478,10 @@ impl OpenCADStudio {
         for &handle in handles {
             self.tabs[i].scene.mark_entity_dirty(handle);
         }
+        // Solid (ACIS) meshes bake their colour into the mesh, so a colour /
+        // layer change needs an explicit recolour — re-tessellating wires
+        // alone wouldn't update them.
+        self.tabs[i].scene.recolor_meshes();
         self.tabs[i].scene.bump_geometry_no_blocks();
     }