release: 0.3.0: PTR fix via public resolvers; monitoring URLs and nav icons

panel: the PTR (reverse DNS) check no longer reports a correctly published
Fixed:
  - panel: the PTR (reverse DNS) check no longer reports a correctly published
Changed:
  - panel: the three monitoring pages now live at URLs that match their nav
  - panel: each entry in the navigation bar now carries an icon beside its label,
  - panel: the navigation bar is laid out as two rows on purpose — the signed-in

Full detail: CHANGELOG.md (0.3.0).

internal/dnscheck/dnscheck.go

@@ -103,10 +103,11 @@ type cached[T any] struct {
 	expires time.Time
 }
 
-// New returns a Checker using the process resolver and the package's default
-// timeout and cache lifetimes.
-func New() *Checker {
-	return newChecker(net.DefaultResolver, lookupTimeout, serverTTL, domainTTL)
+// New returns a Checker querying the given recursive resolvers (empty means
+// DefaultResolvers) with the package's default timeout and cache lifetimes.
+// The lookups deliberately bypass the system resolver — see externalResolver.
+func New(resolvers []string) *Checker {
+	return newChecker(newExternalResolver(resolvers), lookupTimeout, serverTTL, domainTTL)
 }
 
 func newChecker(r resolver, timeout, srvTTL, domTTL time.Duration) *Checker {