enhance: presence debounce

src/main/frontend/components/block.css

@@ -233,6 +233,18 @@
   @apply absolute top-1/2 -translate-y-1/2 pointer-events-none;
   left: 6px;
   z-index: 2;
+  opacity: 0;
+  animation: block-editing-avatar-fade-in 160ms ease-out forwards;
+}
+
+@keyframes block-editing-avatar-fade-in {
+  from {
+    opacity: 0;
+  }
+
+  to {
+    opacity: 1;
+  }
 }
 
 .ls-page-title .block-control-wrap {

src/main/frontend/handler/db_based/sync.cljs

@@ -7,6 +7,7 @@
             [frontend.handler.repo :as repo-handler]
             [frontend.handler.user :as user-handler]
             [frontend.state :as state]
+            [frontend.util :as util]
             [lambdaisland.glogi :as log]
             [logseq.db :as ldb]
             [logseq.db-sync.malli-schema :as db-sync-schema]
@@ -166,9 +167,15 @@
   (log/info :db-sync/stop true)
   (state/<invoke-db-worker :thread-api/db-sync-stop))
 
+(defonce ^:private debounced-update-presence
+  (util/debounce
+   (fn [editing-block-uuid]
+     (state/<invoke-db-worker :thread-api/db-sync-update-presence editing-block-uuid))
+   1000))
+
 (defn <rtc-update-presence!
   [editing-block-uuid]
-  (state/<invoke-db-worker :thread-api/db-sync-update-presence editing-block-uuid))
+  (debounced-update-presence editing-block-uuid))
 
 (defn <rtc-get-users-info
   []