Add notification centre and realtime toasts

apps/dashboard/src/app/app-shell.tsx

@@ -2,12 +2,13 @@ import { useState } from 'react';
 import { NavLink, Outlet } from 'react-router-dom';
 import { navigationItems } from './navigation.js';
 import { ShellStatusPanel } from './shell-status-panel.js';
+import { NotificationBell, NotificationProvider, NotificationViewport } from './notifications.js';
 
 export function AppShell() {
   const [isNavigationOpen, setIsNavigationOpen] = useState(false);
 
   return (
-    <div className="app-shell">
+    <NotificationProvider><div className="app-shell">
       <a className="skip-link" href="#main-content">Skip to content</a>
       <aside className={isNavigationOpen ? 'sidebar is-open' : 'sidebar'}>
         <div className="brand">
@@ -16,6 +17,7 @@ export function AppShell() {
             <strong>Reddit Bot</strong>
             <span>Operator console</span>
           </div>
+          <NotificationBell />
         </div>
         <nav aria-label="Primary navigation" id="primary-navigation">
           {navigationItems.map((item) => (
@@ -45,6 +47,8 @@ export function AppShell() {
       <div className="workspace">
         <header className="mobile-header">
           <span>Reddit Bot</span>
+          <div className="mobile-header-actions">
+            <NotificationBell />
             <button
               aria-controls="primary-navigation"
               aria-expanded={isNavigationOpen}
@@ -55,11 +59,13 @@ export function AppShell() {
             >
               <span aria-hidden="true">{isNavigationOpen ? '×' : '☰'}</span>
             </button>
+          </div>
         </header>
         <main id="main-content" tabIndex={-1}>
           <Outlet />
         </main>
       </div>
-    </div>
+      <NotificationViewport />
+    </div></NotificationProvider>
   );
 }

apps/dashboard/src/app/notifications.css

@@ -0,0 +1,57 @@
+.notification-bell {
+  position: relative;
+  display: grid;
+  flex: 0 0 auto;
+  place-items: center;
+  width: 2.5rem;
+  height: 2.5rem;
+  padding: 0;
+  color: #dfe9e3;
+  background: var(--surface);
+  border: 1px solid var(--border);
+  border-radius: .7rem;
+}
+.notification-bell:hover { color: var(--accent); border-color: #3d5a4c; }
+.notification-bell:focus-visible, .notification-close:focus-visible, .notification-clear:focus-visible, .notification-entry:focus-visible, .notification-toast a:focus-visible, .notification-toast button:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
+.notification-bell svg, .notification-empty svg { width: 1.2rem; fill: none; stroke: currentColor; stroke-linecap: round; stroke-linejoin: round; stroke-width: 1.8; }
+.notification-badge { position: absolute; top: -.35rem; right: -.35rem; display: grid; place-items: center; min-width: 1.15rem; height: 1.15rem; padding: 0 .25rem; color: #07130c; background: var(--accent); border: 2px solid #0c1511; border-radius: 999px; font-size: .62rem; font-weight: 900; line-height: 1; }
+.brand { justify-content: space-between; }
+.brand > div { margin-right: auto; }
+.notification-backdrop { position: fixed; inset: 0; z-index: 69; width: 100%; padding: 0; background: rgba(0, 0, 0, .52); border: 0; }
+.notification-centre { position: fixed; inset: 0 0 0 auto; z-index: 70; display: grid; grid-template-rows: auto minmax(0, 1fr) auto; width: min(27rem, 100%); visibility: hidden; background: #0c1511; border-left: 1px solid var(--border); box-shadow: -1.5rem 0 4rem rgba(0, 0, 0, .38); transform: translateX(100%); transition: transform 220ms ease, visibility 220ms; }
+.notification-centre.is-open { visibility: visible; transform: translateX(0); }
+.notification-centre > header { display: flex; align-items: center; justify-content: space-between; min-height: 5.5rem; padding: 1.2rem 1.25rem; border-bottom: 1px solid var(--border); }
+.notification-centre h2 { font-size: 1.35rem; letter-spacing: -.025em; }
+.notification-centre .eyebrow { margin-bottom: .25rem; }
+.notification-close { display: grid; place-items: center; width: 2.35rem; height: 2.35rem; padding: 0; color: var(--muted); background: transparent; border: 1px solid var(--border); border-radius: .6rem; font-size: 1.5rem; line-height: 1; }
+.notification-list { min-height: 0; padding: 0; margin: 0; overflow-y: auto; list-style: none; }
+.notification-list li { border-bottom: 1px solid var(--border); }
+.notification-entry { display: grid; grid-template-columns: .65rem minmax(0, 1fr); gap: .8rem; padding: 1rem 1.25rem; color: inherit; text-decoration: none; }
+a.notification-entry:hover { background: var(--surface); }
+.notification-signal { width: .55rem; height: .55rem; margin-top: .3rem; background: #77a6d8; border-radius: 50%; box-shadow: 0 0 0 .3rem rgba(119, 166, 216, .1); }
+.notification-signal.success { background: var(--accent); box-shadow: 0 0 0 .3rem rgba(117, 214, 157, .1); }
+.notification-signal.warning { background: var(--warning); box-shadow: 0 0 0 .3rem rgba(243, 199, 107, .1); }
+.notification-signal.error { background: var(--danger); box-shadow: 0 0 0 .3rem rgba(255, 138, 132, .1); }
+.notification-copy { display: grid; gap: .28rem; min-width: 0; }
+.notification-copy strong { color: #edf5f0; font-size: .9rem; line-height: 1.3; }
+.notification-copy > span { overflow: hidden; color: var(--muted); font-size: .82rem; line-height: 1.45; text-overflow: ellipsis; }
+.notification-copy time { color: #71857b; font-size: .7rem; }
+.notification-centre > footer { display: flex; justify-content: flex-end; padding: .8rem 1.25rem; border-top: 1px solid var(--border); }
+.notification-clear { padding: .4rem 0; color: var(--muted); background: transparent; border: 0; font-size: .78rem; font-weight: 700; }
+.notification-clear:hover { color: #edf5f0; }
+.notification-empty { display: grid; place-items: center; align-content: center; padding: 2rem; text-align: center; }
+.notification-empty > span { display: grid; place-items: center; width: 3.25rem; height: 3.25rem; margin-bottom: .9rem; color: var(--accent); background: var(--accent-dark); border: 1px solid #28593d; border-radius: 1rem; }
+.notification-empty strong { margin-bottom: .35rem; font-size: 1rem; }
+.notification-empty p { max-width: 18rem; margin: 0; color: var(--muted); font-size: .82rem; line-height: 1.5; }
+.toast-stack { position: fixed; right: 1rem; bottom: 1rem; z-index: 75; display: grid; gap: .65rem; width: min(24rem, calc(100% - 2rem)); pointer-events: none; }
+.notification-toast { position: relative; overflow: hidden; background: #15221c; border: 1px solid #355044; border-radius: .85rem; box-shadow: 0 1rem 3rem rgba(0, 0, 0, .4); pointer-events: auto; animation: notification-arrive 220ms ease-out both; }
+.notification-toast.warning { background: #282112; border-color: #5b4922; }
+.notification-toast.error { background: #2d1715; border-color: #69332e; }
+.notification-toast > a, .notification-toast > div { display: grid; grid-template-columns: .65rem minmax(0, 1fr); gap: .75rem; padding: .9rem 2.75rem .9rem 1rem; color: inherit; text-decoration: none; }
+.notification-toast > a:hover { background: rgba(255, 255, 255, .035); }
+.notification-toast .notification-copy time { display: none; }
+.notification-toast > button { position: absolute; top: .5rem; right: .5rem; width: 1.8rem; height: 1.8rem; padding: 0; color: var(--muted); background: transparent; border: 0; border-radius: .35rem; font-size: 1.2rem; }
+@keyframes notification-arrive { from { opacity: 0; transform: translateY(.75rem) scale(.98); } }
+@media (prefers-reduced-motion: reduce) { .notification-centre, .notification-toast { transition: none; animation: none; } }
+@media (max-width: 47.999rem) { .brand .notification-bell { display: none; } .toast-stack { bottom: .75rem; } }
+@media (min-width: 48rem) { .mobile-header .notification-bell { display: none; } }

apps/dashboard/src/app/notifications.tsx

@@ -0,0 +1,346 @@
+import type { DashboardEvent } from '../../../../packages/api-contracts/src/index.js';
+import {
+  createContext,
+  useCallback,
+  useContext,
+  useEffect,
+  useMemo,
+  useState,
+  type PropsWithChildren,
+} from 'react';
+import { Link } from 'react-router-dom';
+import { z } from 'zod';
+import { useDashboardRealtime } from './realtime-provider.js';
+import './notifications.css';
+
+export type NotificationTone = 'info' | 'success' | 'warning' | 'error';
+
+export interface NotificationItem {
+  id: string;
+  title: string;
+  message: string;
+  occurredAt: string;
+  tone: NotificationTone;
+  href?: string;
+  isRead: boolean;
+}
+
+export type NotificationDraft = Omit<NotificationItem, 'isRead'>;
+
+interface NotificationContextValue {
+  isOpen: boolean;
+  notifications: readonly NotificationItem[];
+  toasts: readonly NotificationItem[];
+  unreadCount: number;
+  clearAll(): void;
+  dismissToast(id: string): void;
+  setOpen(isOpen: boolean): void;
+}
+
+interface RealtimeSubscription {
+  subscribe(listener: (event: DashboardEvent) => void): () => void;
+}
+
+const STORAGE_KEY = 'reddit-bot.notifications.v1';
+const MAX_NOTIFICATIONS = 50;
+const NotificationContext = createContext<NotificationContextValue | null>(null);
+const StoredNotificationsSchema = z.array(z.strictObject({
+  id: z.string(),
+  title: z.string(),
+  message: z.string(),
+  occurredAt: z.string(),
+  tone: z.enum(['info', 'success', 'warning', 'error']),
+  href: z.string().optional(),
+  isRead: z.boolean(),
+}));
+
+function notificationStorage(): Storage | undefined {
+  try {
+    return globalThis.localStorage;
+  } catch {
+    return undefined;
+  }
+}
+
+function titleCase(value: string): string {
+  return value.charAt(0).toUpperCase() + value.slice(1).replaceAll('-', ' ');
+}
+
+export function notificationForEvent(event: DashboardEvent): NotificationDraft | null {
+  switch (event.type) {
+    case 'reply.received':
+      return {
+        id: event.id,
+        occurredAt: event.occurredAt,
+        title: `New reply from u/${event.payload.sender}`,
+        message: event.payload.preview?.trim() || 'A new message arrived in this conversation.',
+        tone: 'success',
+        href: `/conversations/${encodeURIComponent(event.payload.conversationId)}`,
+      };
+    case 'message.sent':
+      return {
+        id: event.id,
+        occurredAt: event.occurredAt,
+        title: `Message sent to u/${event.payload.recipient}`,
+        message: 'The message was delivered successfully.',
+        tone: 'success',
+        href: event.payload.conversationId
+          ? `/conversations/${encodeURIComponent(event.payload.conversationId)}`
+          : '/conversations',
+      };
+    case 'message.failed':
+      return {
+        id: event.id,
+        occurredAt: event.occurredAt,
+        title: `Message to u/${event.payload.recipient} failed`,
+        message: event.payload.reason,
+        tone: 'error',
+        href: event.payload.conversationId
+          ? `/conversations/${encodeURIComponent(event.payload.conversationId)}`
+          : '/operations',
+      };
+    case 'bot.status.changed':
+      return {
+        id: event.id,
+        occurredAt: event.occurredAt,
+        title: `Bot ${event.payload.status}`,
+        message: event.payload.reason ?? `The bot is now ${event.payload.status}.`,
+        tone: event.payload.status === 'running' ? 'success' : event.payload.status === 'stopped' ? 'warning' : 'info',
+        href: '/operations',
+      };
+    case 'sync.completed':
+      return {
+        id: event.id,
+        occurredAt: event.occurredAt,
+        title: `${titleCase(event.payload.kind)} sync complete`,
+        message: `${event.payload.processed.toLocaleString()} items processed.`,
+        tone: 'success',
+        href: '/operations',
+      };
+    case 'sync.failed':
+      return {
+        id: event.id,
+        occurredAt: event.occurredAt,
+        title: `${titleCase(event.payload.kind)} sync failed`,
+        message: event.payload.reason,
+        tone: 'error',
+        href: '/operations',
+      };
+    case 'rate-limit.changed':
+      return {
+        id: event.id,
+        occurredAt: event.occurredAt,
+        title: event.payload.limited ? 'Rate limit reached' : 'Rate limit cleared',
+        message: event.payload.reason ?? (event.payload.limited
+          ? 'Sending will resume when the limit resets.'
+          : 'The bot can send messages again.'),
+        tone: event.payload.limited ? 'warning' : 'success',
+        href: '/operations',
+      };
+    case 'reddit.session.changed':
+      if (!['authenticated', 'expired', 'logged-out', 'error'].includes(event.payload.status)) return null;
+      return {
+        id: event.id,
+        occurredAt: event.occurredAt,
+        title: event.payload.status === 'authenticated' ? 'Reddit account connected' : 'Reddit account needs attention',
+        message: event.payload.reason ?? (event.payload.username
+          ? `Signed in as u/${event.payload.username}.`
+          : `Session status changed to ${event.payload.status}.`),
+        tone: event.payload.status === 'authenticated' ? 'success' : 'error',
+        href: '/settings',
+      };
+    case 'conversation.updated':
+    case 'sync.started':
+    case 'sync.progress':
+    case 'log.created':
+      return null;
+  }
+}
+
+function loadNotifications(): NotificationItem[] {
+  const storage = notificationStorage();
+  if (!storage) return [];
+  try {
+    const value: unknown = JSON.parse(storage.getItem(STORAGE_KEY) ?? '[]');
+    const parsed = StoredNotificationsSchema.safeParse(value);
+    return parsed.success ? parsed.data.slice(0, MAX_NOTIFICATIONS) : [];
+  } catch {
+    return [];
+  }
+}
+
+export interface NotificationProviderProps extends PropsWithChildren {
+  realtime?: RealtimeSubscription;
+}
+
+export function NotificationProvider({ children, realtime: realtimeOverride }: NotificationProviderProps) {
+  const dashboardRealtime = useDashboardRealtime();
+  const realtime = realtimeOverride ?? dashboardRealtime;
+  const [isOpen, setIsOpenState] = useState(false);
+  const [notifications, setNotifications] = useState<NotificationItem[]>(loadNotifications);
+  const [toasts, setToasts] = useState<NotificationItem[]>([]);
+
+  const dismissToast = useCallback((id: string) => {
+    setToasts((current) => current.filter((toast) => toast.id !== id));
+  }, []);
+
+  const setOpen = useCallback((nextOpen: boolean) => {
+    setIsOpenState(nextOpen);
+    if (nextOpen) setNotifications((current) => current.map((item) => ({ ...item, isRead: true })));
+  }, []);
+
+  useEffect(() => {
+    try {
+      notificationStorage()?.setItem(STORAGE_KEY, JSON.stringify(notifications));
+    } catch {
+      // Storage can be unavailable in private or restricted browser contexts.
+    }
+  }, [notifications]);
+
+  useEffect(() => {
+    if (isOpen && notifications.some((item) => !item.isRead)) {
+      setNotifications((current) => current.map((item) => ({ ...item, isRead: true })));
+    }
+  }, [isOpen, notifications]);
+
+  useEffect(() => realtime.subscribe((event) => {
+    const draft = notificationForEvent(event);
+    if (!draft) return;
+    const item = { ...draft, isRead: false };
+    setNotifications((current) => current.some((entry) => entry.id === item.id)
+      ? current
+      : [item, ...current].slice(0, MAX_NOTIFICATIONS));
+    setToasts((current) => current.some((entry) => entry.id === item.id)
+      ? current
+      : [...current, item].slice(-3));
+  }), [realtime]);
+
+  useEffect(() => {
+    if (toasts.length === 0) return undefined;
+    const timers = toasts.map((toast) => globalThis.setTimeout(
+      () => dismissToast(toast.id),
+      toast.tone === 'error' ? 8_000 : 5_000,
+    ));
+    return () => timers.forEach((timer) => globalThis.clearTimeout(timer));
+  }, [dismissToast, toasts]);
+
+  useEffect(() => {
+    function closeOnEscape(event: KeyboardEvent): void {
+      if (event.key === 'Escape') setOpen(false);
+    }
+    globalThis.addEventListener('keydown', closeOnEscape);
+    return () => globalThis.removeEventListener('keydown', closeOnEscape);
+  }, [setOpen]);
+
+  const value = useMemo<NotificationContextValue>(() => ({
+    isOpen,
+    notifications,
+    toasts,
+    unreadCount: notifications.filter((item) => !item.isRead).length,
+    clearAll: () => setNotifications([]),
+    dismissToast,
+    setOpen,
+  }), [dismissToast, isOpen, notifications, setOpen, toasts]);
+
+  return <NotificationContext.Provider value={value}>{children}</NotificationContext.Provider>;
+}
+
+function useNotifications(): NotificationContextValue {
+  const context = useContext(NotificationContext);
+  if (!context) throw new Error('Notifications must be used within NotificationProvider');
+  return context;
+}
+
+function BellIcon() {
+  return (
+    <svg aria-hidden="true" viewBox="0 0 24 24">
+      <path d="M18 8a6 6 0 0 0-12 0c0 7-3 7-3 9h18c0-2-3-2-3-9M10 21h4" />
+    </svg>
+  );
+}
+
+export function NotificationBell({ className = '' }: { className?: string }) {
+  const { isOpen, setOpen, unreadCount } = useNotifications();
+  return (
+    <button
+      aria-controls="notification-centre"
+      aria-expanded={isOpen}
+      aria-label={unreadCount > 0 ? `Notifications, ${unreadCount} unread` : 'Notifications'}
+      className={`notification-bell ${className}`.trim()}
+      onClick={() => setOpen(!isOpen)}
+      type="button"
+    >
+      <BellIcon />
+      {unreadCount > 0 ? <span className="notification-badge">{unreadCount > 99 ? '99+' : unreadCount}</span> : null}
+    </button>
+  );
+}
+
+function formattedTime(value: string): string {
+  const date = new Date(value);
+  if (Number.isNaN(date.getTime())) return '';
+  return new Intl.DateTimeFormat(undefined, { dateStyle: 'medium', timeStyle: 'short' }).format(date);
+}
+
+function NotificationContent({ item }: { item: NotificationItem }) {
+  return (
+    <>
+      <span className={`notification-signal ${item.tone}`} aria-hidden="true" />
+      <span className="notification-copy">
+        <strong>{item.title}</strong>
+        <span>{item.message}</span>
+        <time dateTime={item.occurredAt}>{formattedTime(item.occurredAt)}</time>
+      </span>
+    </>
+  );
+}
+
+export function NotificationViewport() {
+  const { clearAll, dismissToast, isOpen, notifications, setOpen, toasts } = useNotifications();
+  return (
+    <>
+      {isOpen ? <button aria-label="Close notifications" className="notification-backdrop" onClick={() => setOpen(false)} type="button" /> : null}
+      <aside aria-label="Notifications" className={isOpen ? 'notification-centre is-open' : 'notification-centre'} id="notification-centre">
+        <header>
+          <div>
+            <span className="eyebrow">Activity inbox</span>
+            <h2>Notifications</h2>
+          </div>
+          <button aria-label="Close notification centre" className="notification-close" onClick={() => setOpen(false)} type="button">×</button>
+        </header>
+        {notifications.length > 0 ? (
+          <>
+            <ol className="notification-list">
+              {notifications.map((item) => (
+                <li key={item.id}>
+                  {item.href ? (
+                    <Link className="notification-entry" onClick={() => setOpen(false)} to={item.href}>
+                      <NotificationContent item={item} />
+                    </Link>
+                  ) : <div className="notification-entry"><NotificationContent item={item} /></div>}
+                </li>
+              ))}
+            </ol>
+            <footer><button className="notification-clear" onClick={clearAll} type="button">Clear all</button></footer>
+          </>
+        ) : (
+          <div className="notification-empty">
+            <span aria-hidden="true"><BellIcon /></span>
+            <strong>All quiet</strong>
+            <p>Replies, delivery updates, syncs, and account alerts will appear here.</p>
+          </div>
+        )}
+      </aside>
+      <div aria-atomic="false" aria-live="polite" className="toast-stack">
+        {toasts.map((toast) => (
+          <div className={`notification-toast ${toast.tone}`} key={toast.id} role={toast.tone === 'error' ? 'alert' : 'status'}>
+            {toast.href ? (
+              <Link onClick={() => dismissToast(toast.id)} to={toast.href}><NotificationContent item={toast} /></Link>
+            ) : <div><NotificationContent item={toast} /></div>}
+            <button aria-label={`Dismiss ${toast.title}`} onClick={() => dismissToast(toast.id)} type="button">×</button>
+          </div>
+        ))}
+      </div>
+    </>
+  );
+}

apps/dashboard/src/styles.css

@@ -42,6 +42,7 @@ nav { display: grid; gap: .35rem; }
 .navigation-backdrop { position: fixed; inset: 0; z-index: 20; width: 100%; border: 0; background: rgba(0, 0, 0, .6); }
 .workspace { min-height: 100vh; }
 .mobile-header { position: sticky; top: 0; z-index: 15; display: flex; align-items: center; justify-content: space-between; height: 4rem; padding: 0 1rem; background: rgba(9, 17, 14, .92); border-bottom: 1px solid var(--border); backdrop-filter: blur(12px); font-weight: 700; }
+.mobile-header-actions { display: flex; gap: .55rem; }
 .icon-button { width: 2.5rem; height: 2.5rem; border: 1px solid var(--border); border-radius: .6rem; color: white; background: var(--surface); font-size: 1.25rem; }
 main { min-height: calc(100vh - 4rem); }
 .page { width: min(78rem, 100%); margin: 0 auto; padding: 1.5rem 1rem 4rem; }

tests/dashboard/notifications.test.tsx

@@ -0,0 +1,93 @@
+// @vitest-environment jsdom
+
+import '@testing-library/jest-dom/vitest';
+import { act, cleanup, render, screen, within } from '@testing-library/react';
+import userEvent from '@testing-library/user-event';
+import { MemoryRouter } from 'react-router-dom';
+import { afterEach, describe, expect, it, vi } from 'vitest';
+import type { DashboardEvent } from '../../packages/api-contracts/src/index.js';
+import {
+  NotificationBell,
+  NotificationProvider,
+  NotificationViewport,
+  notificationForEvent,
+} from '../../apps/dashboard/src/app/notifications.js';
+
+class FakeRealtime {
+  private listener?: (event: DashboardEvent) => void;
+
+  subscribe(listener: (event: DashboardEvent) => void): () => void {
+    this.listener = listener;
+    return () => { this.listener = undefined; };
+  }
+
+  emit(event: DashboardEvent): void {
+    this.listener?.(event);
+  }
+}
+
+afterEach(() => {
+  cleanup();
+  vi.restoreAllMocks();
+});
+
+describe('dashboard notifications', () => {
+  it('turns actionable realtime events into useful notification copy', () => {
+    expect(notificationForEvent({
+      id: 'reply-1',
+      occurredAt: '2026-08-09T09:30:00.000Z',
+      type: 'reply.received',
+      payload: { conversationId: 'room/one', replyId: 'message-1', sender: 'alice', preview: 'Sounds good!' },
+    })).toMatchObject({
+      title: 'New reply from u/alice',
+      message: 'Sounds good!',
+      tone: 'success',
+      href: '/conversations/room%2Fone',
+    });
+
+    expect(notificationForEvent({
+      id: 'log-1',
+      occurredAt: '2026-08-09T09:30:00.000Z',
+      type: 'log.created',
+      payload: { level: 'info', message: 'Routine detail' },
+    })).toBeNull();
+  });
+
+  it('shows new events as toasts and keeps them in a readable notification centre', async () => {
+    const realtime = new FakeRealtime();
+    const user = userEvent.setup();
+    render(
+      <MemoryRouter>
+        <NotificationProvider realtime={realtime}>
+          <NotificationBell />
+          <NotificationViewport />
+        </NotificationProvider>
+      </MemoryRouter>,
+    );
+
+    expect(screen.getByRole('button', { name: 'Notifications' })).toBeInTheDocument();
+    act(() => realtime.emit({
+      id: 'reply-1',
+      occurredAt: '2026-08-09T09:30:00.000Z',
+      type: 'reply.received',
+      payload: { conversationId: 'conversation-1', replyId: 'message-1', sender: 'alice', preview: 'Sounds good!' },
+    }));
+
+    const toast = screen.getByRole('status');
+    expect(toast).toHaveTextContent('New reply from u/alice');
+    expect(screen.getByRole('button', { name: 'Notifications, 1 unread' })).toBeInTheDocument();
+
+    await user.click(screen.getByRole('button', { name: 'Notifications, 1 unread' }));
+    const centre = screen.getByLabelText('Notifications', { selector: 'aside' });
+    expect(centre).toHaveClass('is-open');
+    expect(within(centre).getByText('Sounds good!')).toBeInTheDocument();
+    expect(within(centre).getByRole('link', { name: /New reply from u\/alice/ })).toHaveAttribute(
+      'href',
+      '/conversations/conversation-1',
+    );
+    expect(screen.getByRole('button', { name: 'Notifications' })).toBeInTheDocument();
+
+    await user.click(within(centre).getByRole('button', { name: 'Clear all' }));
+    expect(within(centre).getByText('All quiet')).toBeInTheDocument();
+  });
+});