The Sites & Replication page (added in the prior multi-master LDAP
release) 500'd on every load: views/sites.ejs included nonexistent
partials 'header'/'footer' instead of this app's actual 'top'/'bottom'.
Fixed to match every other view.
Also refreshed all README screenshots against the current UI and added
a new Sites & Replication screenshot.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
wmantly
