simvx.editor.panels._properties_class_section

Class section + custom-class promotion UI for the inspector.

Builds the “Built-in”/user-class metadata section (module path, source file + line, “Edit class file” link) and the “Make Custom Class” promotion flow. Mixed into :class:PropertiesPanel via _ClassSectionMixin: the methods live on the panel class through the MRO, so all public/test-visible names stay on PropertiesPanel.