Pause blocking, blocked clients and a blocked line in the statistics, compact view picker

jarl block pause|resume (and the Blocking page) lets every name through
for a while; jarld resumes on time. The lists stay loaded: the rules zone
just passes everything. Statistics gain the clients with the most blocked
queries and blocked queries on the queries chart. The view choice in the
blocking forms is a dropdown.

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

cmd/jarld/main.go

@@ -339,22 +339,27 @@ func serveCmd() *cobra.Command {
 
 // blocklistLoop keeps blocklists up to date (docs/blocking.md): every few
 // minutes it downloads the lists that are due, and at once when a list
-// was added or changed.
+// was added or changed. It also ends a pause of blocking on time.
 func blocklistLoop(ctx context.Context, a *app) {
 	select {
 	case <-ctx.Done():
 		return
 	case <-time.After(10 * time.Second): // let jarld finish starting
 	}
-	t := time.NewTicker(5 * time.Minute)
-	defer t.Stop()
 	for {
 		a.eng.RefreshDue(ctx)
+		wait := 5 * time.Minute
+		if until := a.eng.ResumeBlocking(ctx); !until.IsZero() {
+			wait = min(wait, max(time.Until(until), time.Second))
+		}
+		t := time.NewTimer(wait)
 		select {
 		case <-ctx.Done():
+			t.Stop()
 			return
 		case <-t.C:
 		case <-a.eng.BlocklistKicks():
+			t.Stop()
 		}
 	}
 }