Reverse zones: name hosts from other views' records; search and bulk dismiss for long lists

A reverse zone's fill (and fill-ptr, the missing-PTR counts) names an address no record of its own view uses from another view's record, so an internal reverse zone can give the PTR of a host only external has an AAAA for; New reverse zone with a view chosen lists those addresses, marked. Automatic suggestions stay per view.

For hundreds of addresses: the New reverse zone list has a search; on the Zones page the public addresses fold away, have a search, show 25 at a time and Dismiss these N dismisses everything a search found in one change (reverse.dismiss takes prefixes; --dismiss takes several).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

internal/engine/inputs.go

@@ -73,7 +73,9 @@ const (
 type DismissInput struct {
 	ViewID int64  `json:"view_id,omitempty"`
 	View   string `json:"view,omitempty"`
-	Prefix string `json:"prefix"`
+	Prefix string `json:"prefix,omitempty"`
+	// Prefixes dismisses (or brings back) several at once.
+	Prefixes []string `json:"prefixes,omitempty"`
 }
 
 // AckInput acknowledges (or un-acknowledges) an exposure finding of a view