Settings was a single long page. Break it into a sub-nav (Notifications, DNS Badges, Cache) with its own route per section, each loading and saving independently. Also add the DNS record-cache clearing action that Sloth Manager had — a new admin-only POST /api/dns/cache/clear truncates the zone/record cache tables so stale data can be wiped and zones re-synced from scratch. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>