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>

internal/server/blocking_test.go

@@ -81,6 +81,22 @@ func TestBlockingAPI(t *testing.T) {
 			t.Errorf("reader %s %s = %d", c.method, c.path, status)
 		}
 	}
+	// Pausing.
+	if _, status := e.req("POST", "/blocking/pause", e.token, map[string]any{"minutes": 0}); status != 400 {
+		t.Errorf("a 0-minute pause = %d", status)
+	}
+	e.do("POST", "/blocking/pause", e.token, map[string]any{"minutes": 30}, 201)
+	if st := e.do("GET", "/blocking/status", e.token, nil, 200); st["paused_until"] == nil {
+		t.Errorf("status while paused = %v", st)
+	}
+	if st := e.do("GET", "/status", e.token, nil, 200); st["blocking_paused_until"] == nil {
+		t.Errorf("dashboard while paused = %v", st["blocking_paused_until"])
+	}
+	e.do("POST", "/blocking/resume", e.token, nil, 201)
+	if st := e.do("GET", "/blocking/status", e.token, nil, 200); st["paused_until"] != nil {
+		t.Errorf("status after resuming = %v", st)
+	}
+
 	// A list that can't be downloaded shows on the dashboard.
 	e.do("POST", "/blocking/lists", e.token, map[string]any{"name": "gone", "url": lists.URL + "/missing"}, 201)
 	if l := e.do("POST", "/blocking/lists/gone/refresh", e.token, nil, 200); l["state"] != "error" {