The notification bell hears new notifications as they happen (notificationsRealtime; Shared 1.22.0, roadmap WS-E task 3): Network's network.notification.created over OpenVibe.Events' realtime stream, with polling as the fallback. Only a signed-in bell with a Network token opens a stream.

ddiff --git a/public/js/ov-navbar-live.js b/public/js/ov-navbar-live.js
iindex 60edc967..5e2c17d1 100644
---- a/public/js/ov-navbar-live.js
++++ b/public/js/ov-navbar-live.js
@@@ -71,6 +71,7 @@
              service: 'live', mount: '#navbar-mount', className: 'navbar', auth: 'external', apiBase: 'https://openvibe.network',
              user: user || null, token: (function () { try { return localStorage.getItem('token'); } catch (e) { return null; } })(),
              loginUrl: '/api/auth/sso/login', accounts: false, networkLinks: 0, history: false, silentLogin: false, fedcm: false, recent: false,
++            notificationsRealtime: true,   // the bell hears new notifications over OpenVibe.Events (Shared 1.22.0)
              links: links(user), menu: menu(user),
              chips: [
                  { id: 'coins', icon: 'fa-coins', tone: 'gold', value: '0', valueId: 'nav-coins-amount', title: 'OpenCoins: click to open your inventory', onClick: () => call('openCosmeticsModal') },