The buttons() plugin-template-extension hook was registered for
dcim.rack and rendered without error, but the button HTML never
appeared on the rendered rack detail page in production — NetBox's
Rack detail template apparently doesn't wire the buttons() slot into
its controls row. right_page() is confirmed working for this plugin
already (the device rack-width panel uses it), so the export links
now render there as a small card instead.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>