- Add addProductDependency and removeProductDependency actions
- Create DependencyPopover and integrate in live editor UI
- Render green requirements and red exclusions badges
- Remove technical parentheses from category checkbox labels
- Add is_required and allow_multiselect category toggles
- Implement module-popover for product module assignment
- Add cascade-protected deletion for categories and products
- Add sidebar link with AdminNavLink active states