feat(notifications): honor chat mute in web realtime alerts

web/src/hooks/useRealtime.ts

@@ -433,6 +433,9 @@ function maybeShowBrowserNotification(
   }
   const chat = useChatStore.getState().chats.find((item) => item.id === chatId);
   const isMention = hasMentionForUser(message.text, currentUsername);
+  if (!isMention && chat?.muted) {
+    return;
+  }
   if (!isMention && chat?.type === "private" && !prefs.privateNotifications) {
     return;
   }