diff --git a/web/src/App.test.tsx b/web/src/App.test.tsx
index d284d47ad..d0b4a55ef 100644
--- a/web/src/App.test.tsx
+++ b/web/src/App.test.tsx
@@ -22,7 +22,7 @@ describe('ChicoryTV SPA scaffold', () => {
     mockDashboardApi();
   });
 
-  it('renders the admin shell chrome and loads the design system stylesheet', () => {
+  it('renders the admin shell chrome and loads the design system stylesheet', async () => {
     render(<App />);
 
     expect(screen.getByRole('img', { name: 'ChicoryTV' })).toBeInTheDocument();
@@ -31,7 +31,7 @@ describe('ChicoryTV SPA scaffold', () => {
     expect(screen.getByRole('searchbox', { name: 'Search' })).toBeInTheDocument();
     expect(screen.getByRole('button', { name: 'Connect' })).toBeInTheDocument();
     expect(screen.getByRole('button', { name: 'Add Channel' })).toBeInTheDocument();
-    expect(screen.getByText('Healthy')).toBeInTheDocument();
+    expect(await screen.findAllByText('Healthy')).toHaveLength(2);
     expect(designSystemStylesheet).toBe('../../design-system/styles.css');
   });
 
@@ -161,8 +161,8 @@ describe('ChicoryTV SPA scaffold', () => {
 
     expect(await screen.findByText('On air now')).toBeInTheDocument();
     expect(screen.getByText('System health')).toBeInTheDocument();
-    expect(screen.getByText('Recent activity')).toBeInTheDocument();
-    expect(screen.getByText('Release notes')).toBeInTheDocument();
+    expect(screen.queryByText('Recent activity')).not.toBeInTheDocument();
+    expect(screen.queryByText('Release notes')).not.toBeInTheDocument();
   });
 
   it('renders dashboard cards and stats from live API responses', async () => {
@@ -185,9 +185,68 @@ describe('ChicoryTV SPA scaffold', () => {
           streamingMode: 'MPEG-TS'
         }
       ],
-      collections: [{ id: 10, name: 'Saturday Morning' }],
-      schedules: [{ id: 20, name: 'Default Schedule' }],
-      sessions: [{ channelNumber: '5.1' }, { channelNumber: '24' }],
+      channelStates: [
+        {
+          channelId: 1,
+          channelNumber: '5.1',
+          onAir: true,
+          nowPlaying: {
+            finishUtc: '2026-07-04T21:30:00Z',
+            startUtc: '2026-07-04T21:00:00Z',
+            title: 'Saturday Morning Cartoons'
+          }
+        },
+        {
+          channelId: 2,
+          channelNumber: '24',
+          onAir: false,
+          nowPlaying: null
+        }
+      ],
+      health: [
+        {
+          detail: 'SQLite is reachable',
+          link: null,
+          status: 'pass',
+          title: 'Database'
+        },
+        {
+          detail: 'FFmpeg path is missing',
+          link: null,
+          status: 'warn',
+          title: 'FFmpeg'
+        }
+      ],
+      mediaSources: [
+        {
+          connectionAddress: null,
+          id: 30,
+          kind: 'Local',
+          libraries: [
+            { id: 31, kind: 'Movies', name: 'Movies' },
+            { id: 32, kind: 'Shows', name: 'Shows' }
+          ],
+          name: 'Local'
+        }
+      ],
+      playouts: {
+        page: [
+          {
+            buildStatus: {
+              lastBuild: '2026-07-04T20:00:00Z',
+              message: null,
+              success: true
+            },
+            channelName: 'Retro Cartoons',
+            channelNumber: '5.1',
+            dailyRebuildTime: null,
+            id: 20,
+            scheduleKind: 'Classic',
+            scheduleName: 'Default Schedule'
+          }
+        ],
+        totalCount: 1
+      },
       version: { apiVersion: 3, appVersion: '26.4.0-test' }
     });
 
@@ -196,15 +255,20 @@ describe('ChicoryTV SPA scaffold', () => {
     expect(await screen.findByRole('heading', { name: 'On air now' })).toBeInTheDocument();
     expect(await screen.findByText('Retro Cartoons')).toBeInTheDocument();
     expect(screen.getByText('5.1')).toBeInTheDocument();
-    expect(screen.getByText('News 24')).toBeInTheDocument();
-    expect(screen.getByText('24')).toBeInTheDocument();
-    expect(screen.getByText('2 streaming')).toBeInTheDocument();
+    expect(screen.queryByText('News 24')).not.toBeInTheDocument();
+    expect(screen.getByText('Saturday Morning Cartoons')).toBeInTheDocument();
+    expect(screen.getByText('1 on air')).toBeInTheDocument();
+    expect(screen.getAllByText('1 warning')).toHaveLength(2);
     expect(screen.getAllByText('2')).toHaveLength(2);
-    expect(screen.getAllByText('1')).toHaveLength(2);
     expect(screen.getByText('26.4.0-test')).toBeInTheDocument();
     expect(window.fetch).toHaveBeenCalledWith('/api/channels', expect.any(Object));
-    expect(window.fetch).toHaveBeenCalledWith('/api/sessions', expect.any(Object));
+    expect(window.fetch).toHaveBeenCalledWith('/api/channels/state', expect.any(Object));
+    expect(window.fetch).toHaveBeenCalledWith('/api/media-sources', expect.any(Object));
+    expect(window.fetch).toHaveBeenCalledWith('/api/playouts', expect.any(Object));
+    expect(window.fetch).toHaveBeenCalledWith('/api/health', expect.any(Object));
     expect(window.fetch).toHaveBeenCalledWith('/api/version', expect.any(Object));
+    expect(window.fetch).not.toHaveBeenCalledWith('/api/sessions', expect.any(Object));
+    expect(window.fetch).not.toHaveBeenCalledWith('/api/schedules', expect.any(Object));
   });
 
   it('shows the dashboard loading state while requests are pending', async () => {
@@ -215,12 +279,70 @@ describe('ChicoryTV SPA scaffold', () => {
     expect(await screen.findByText('Loading dashboard')).toBeInTheDocument();
   });
 
-  it('shows an empty on-air state when the API returns no channels', async () => {
-    mockDashboardApi({ channels: [] });
+  it('shows an empty on-air state when no channel state is on air', async () => {
+    mockDashboardApi({
+      channels: [{ id: 1, name: 'Retro Cartoons', number: '5.1' }],
+      channelStates: [{ channelId: 1, channelNumber: '5.1', onAir: false, nowPlaying: null }]
+    });
 
     render(<App />);
 
-    expect(await screen.findByText('No channels found')).toBeInTheDocument();
+    expect(await screen.findByText('No on-air channels reported')).toBeInTheDocument();
+  });
+
+  it('shows failing health checks with error styling, distinct from neutral info checks', async () => {
+    mockDashboardApi({
+      health: [
+        {
+          detail: 'SQLite is reachable',
+          link: null,
+          status: 'pass',
+          title: 'Database'
+        },
+        {
+          detail: 'FFmpeg path is missing',
+          link: null,
+          status: 'fail',
+          title: 'FFmpeg'
+        },
+        {
+          detail: 'Scheduled maintenance window active',
+          link: null,
+          status: 'info',
+          title: 'Maintenance'
+        }
+      ]
+    });
+
+    const { container } = render(<App />);
+
+    expect(await screen.findByText('FFmpeg path is missing')).toBeInTheDocument();
+    expect(screen.getAllByText('1 failing')).toHaveLength(2);
+    expect(container.querySelectorAll('.ctv-health-icon-error')).toHaveLength(1);
+    expect(container.querySelectorAll('.ctv-health-icon-idle').length).toBeGreaterThanOrEqual(1);
+  });
+
+  it('refreshes health on demand without polling it', async () => {
+    mockDashboardApi({
+      health: [
+        {
+          detail: 'All checks passed',
+          link: null,
+          status: 'pass',
+          title: 'System'
+        }
+      ]
+    });
+
+    render(<App />);
+
+    expect(await screen.findByText('All checks passed')).toBeInTheDocument();
+    expect(fetchCount('/api/health')).toBe(1);
+
+    fireEvent.click(screen.getByRole('button', { name: 'Refresh health' }));
+
+    expect(await screen.findByText('All checks passed')).toBeInTheDocument();
+    expect(fetchCount('/api/health')).toBe(2);
   });
 
   it('shows the API error detail when dashboard loading fails', async () => {
@@ -305,15 +427,17 @@ function jsonResponse(body: unknown, status = 200): Response {
 
 function mockDashboardApi({
   channels = [],
-  collections = [],
-  schedules = [],
-  sessions = [],
+  channelStates = [],
+  health = [],
+  mediaSources = [],
+  playouts = { page: [], totalCount: 0 },
   version = { apiVersion: 3, appVersion: '26.4.0' }
 }: {
   channels?: unknown[];
-  collections?: unknown[];
-  schedules?: unknown[];
-  sessions?: unknown[];
+  channelStates?: unknown[];
+  health?: unknown[];
+  mediaSources?: unknown[];
+  playouts?: unknown;
   version?: unknown;
 } = {}) {
   vi.spyOn(window, 'fetch').mockImplementation((input: RequestInfo | URL) => {
@@ -323,16 +447,20 @@ function mockDashboardApi({
       return Promise.resolve(jsonResponse(channels));
     }
 
-    if (path === '/api/collections') {
-      return Promise.resolve(jsonResponse(collections));
+    if (path === '/api/channels/state') {
+      return Promise.resolve(jsonResponse(channelStates));
     }
 
-    if (path === '/api/schedules') {
-      return Promise.resolve(jsonResponse(schedules));
+    if (path === '/api/media-sources') {
+      return Promise.resolve(jsonResponse(mediaSources));
     }
 
-    if (path === '/api/sessions') {
-      return Promise.resolve(jsonResponse(sessions));
+    if (path === '/api/playouts') {
+      return Promise.resolve(jsonResponse(playouts));
+    }
+
+    if (path === '/api/health') {
+      return Promise.resolve(jsonResponse(health));
     }
 
     if (path === '/api/version') {
@@ -342,3 +470,7 @@ function mockDashboardApi({
     return Promise.resolve(jsonResponse(null, 404));
   });
 }
+
+function fetchCount(path: string): number {
+  return vi.mocked(window.fetch).mock.calls.filter(([input]) => input.toString() === path).length;
+}
diff --git a/web/src/App.tsx b/web/src/App.tsx
index ea0ee7c0b..83c503882 100644
--- a/web/src/App.tsx
+++ b/web/src/App.tsx
@@ -23,11 +23,11 @@ import {
   ListVideo,
   Plus,
   Radio,
+  RefreshCw,
   Search,
   Settings,
-  Sparkles,
+  TriangleAlert,
   Tv,
-  Zap
 } from 'lucide-react';
 import chicoryIconUrl from '../../design-system/assets/chicorytv-icon.svg';
 import {
@@ -41,10 +41,17 @@ import {
   ProgressBar,
   Spinner,
   Stat,
-  StatusDot,
-  Tag
+  StatusDot
 } from './components';
-import { useChannelsQuery, useDashboardQuery, type DashboardChannel } from './api';
+import {
+  useChannelsQuery,
+  useDashboardHealthQuery,
+  useDashboardQuery,
+  useDashboardVersionQuery,
+  type DashboardChannel,
+  type DashboardChannelState,
+  type DashboardHealthQueryState
+} from './api';
 import {
   applyDesignSystemTheme,
   designSystemThemes,
@@ -266,11 +273,15 @@ function ThemeSwitcher({
 
 function Sidebar({
   activeRoute,
+  healthState,
   onNavigate
 }: {
   activeRoute: ScreenRoute | null;
+  healthState: DashboardHealthQueryState;
   onNavigate: (route: ScreenRoute, event: MouseEvent) => void;
 }) {
+  const healthSummary = summarizeHealth(healthState);
+
   return (
     <aside className="ctv-sidebar">
       <div className="ctv-brand">
@@ -291,14 +302,28 @@ function Sidebar({
       <div className="ctv-sidebar-health">
         <div>
           <span>ChicoryTV</span>
-          <code>v26.4.0</code>
+          <SidebarVersion />
         </div>
-        <StatusDot status="ok" label="Healthy" />
+        <StatusDot status={healthSummary.status} label={healthSummary.label} />
       </div>
     </aside>
   );
 }
 
+function SidebarVersion() {
+  const versionQuery = useDashboardVersionQuery();
+
+  if (versionQuery.status === 'success') {
+    return <code>{versionQuery.version.appVersion ?? 'version unknown'}</code>;
+  }
+
+  if (versionQuery.status === 'error') {
+    return <code>version unavailable</code>;
+  }
+
+  return <code>loading version</code>;
+}
+
 function EndpointRow({ icon, label, url }: { icon: ReactNode; label: string; url: string }) {
   const [copied, setCopied] = useState(false);
 
@@ -445,20 +470,107 @@ function TopBar({ route }: { route: ScreenRoute | null }) {
   );
 }
 
-function progressForChannel(channel: DashboardChannel, index: number): number {
-  return ((channel.id * 17 + index * 19) % 72) + 18;
+type HealthStatus = 'error' | 'idle' | 'live' | 'ok' | 'warn';
+
+function summarizeHealth(healthState: DashboardHealthQueryState): { label: string; status: HealthStatus } {
+  if (healthState.status === 'loading') {
+    return { label: 'Checking', status: 'idle' };
+  }
+
+  if (healthState.status === 'error') {
+    return { label: 'Health unavailable', status: 'error' };
+  }
+
+  const failedCount = healthState.checks.filter((check) => isErrorHealthStatus(check.status)).length;
+  const warningCount = healthState.checks.filter((check) => isWarningHealthStatus(check.status)).length;
+
+  if (failedCount > 0) {
+    return { label: `${failedCount} failing`, status: 'error' };
+  }
+
+  if (warningCount > 0) {
+    return { label: `${warningCount} warning${warningCount === 1 ? '' : 's'}`, status: 'warn' };
+  }
+
+  return { label: 'Healthy', status: 'ok' };
 }
 
-function programForChannel(channel: DashboardChannel): string {
-  const profile = channel.fFmpegProfile ?? channel.streamingMode ?? 'Default profile';
-
-  return `${profile} playout stream`;
+// The backend serializes health check status as exactly 'pass' | 'fail' | 'warn' | 'info'
+// (see ErsatzTV.Application/Health/Mapper.cs GetStatus).
+function isWarningHealthStatus(status: string): boolean {
+  return status.toLowerCase() === 'warn';
 }
 
-function OnAirCard({ channel, index }: { channel: DashboardChannel; index: number }) {
-  const name = channel.name ?? 'Unnamed channel';
-  const number = channel.number ?? `${channel.id}`;
-  const progress = progressForChannel(channel, index);
+function isErrorHealthStatus(status: string): boolean {
+  return status.toLowerCase() === 'fail';
+}
+
+function isInfoHealthStatus(status: string): boolean {
+  return status.toLowerCase() === 'info';
+}
+
+function healthIconStatus(status: string): HealthStatus {
+  if (isErrorHealthStatus(status)) {
+    return 'error';
+  }
+
+  if (isWarningHealthStatus(status)) {
+    return 'warn';
+  }
+
+  if (isInfoHealthStatus(status)) {
+    return 'idle';
+  }
+
+  return 'ok';
+}
+
+function healthIcon(status: string): ReactNode {
+  const iconStatus = healthIconStatus(status);
+
+  if (iconStatus === 'error') {
+    return <TriangleAlert aria-hidden="true" size={15} />;
+  }
+
+  if (iconStatus === 'warn') {
+    return <TriangleAlert aria-hidden="true" size={15} />;
+  }
+
+  if (iconStatus === 'idle') {
+    return <Info aria-hidden="true" size={15} />;
+  }
+
+  return <Check aria-hidden="true" size={15} />;
+}
+
+function progressFromNowPlaying(nowPlaying: NonNullable<DashboardChannelState['nowPlaying']>): number | null {
+  const start = new Date(nowPlaying.startUtc).getTime();
+  const finish = new Date(nowPlaying.finishUtc).getTime();
+  const now = Date.now();
+
+  if (!Number.isFinite(start) || !Number.isFinite(finish) || finish <= start) {
+    return null;
+  }
+
+  return Math.round(((now - start) / (finish - start)) * 100);
+}
+
+function minutesUntil(value: string): number | null {
+  const finish = new Date(value).getTime();
+
+  if (!Number.isFinite(finish)) {
+    return null;
+  }
+
+  return Math.max(0, Math.ceil((finish - Date.now()) / 60000));
+}
+
+function OnAirCard({ channel, state }: { channel: DashboardChannel | null; state: DashboardChannelState }) {
+  const name = channel?.name ?? 'Unnamed channel';
+  const number = state.channelNumber || channel?.number || `${state.channelId}`;
+  const nowPlaying = state.nowPlaying;
+  const progress = nowPlaying ? progressFromNowPlaying(nowPlaying) : null;
+  const remaining = nowPlaying ? minutesUntil(nowPlaying.finishUtc) : null;
 
   return (
     <div className="ctv-onair-card">
@@ -472,11 +584,11 @@ function OnAirCard({ channel, index }: { channel: DashboardChannel; index: numbe
           On air
         </Badge>
       </div>
-      <p>{programForChannel(channel)}</p>
+      <p>{nowPlaying?.title ?? 'Now-playing data unavailable'}</p>
       <ProgressBar value={progress} />
       <div className="ctv-onair-meta">
-        <span>{progress}% elapsed</span>
-        <span>{Math.max(4, 60 - progress)}m to next</span>
+        <span>{progress == null ? 'Progress unavailable' : `${Math.max(0, Math.min(100, progress))}% elapsed`}</span>
+        <span>{remaining == null ? 'Finish unavailable' : `${remaining}m to next`}</span>
       </div>
     </div>
   );
@@ -504,128 +616,81 @@ function DashboardErrorState({ error }: { error: string }) {
   );
 }
 
-function HealthPanel({
-  channelCount,
-  sessionCount,
-  apiVersion
-}: {
-  channelCount: number;
-  sessionCount: number;
-  apiVersion: number;
-}) {
-  const rows = [
-    {
-      detail: `API v${apiVersion} responding`,
-      icon: <Check aria-hidden="true" size={15} />,
-      label: 'REST API',
-      status: 'ok' as const
-    },
-    {
-      detail: channelCount > 0 ? `${channelCount} channels loaded` : 'No channels returned',
-      icon: channelCount > 0 ? <Check aria-hidden="true" size={15} /> : <Info aria-hidden="true" size={15} />,
-      label: 'Channel catalog',
-      status: channelCount > 0 ? ('ok' as const) : ('warn' as const)
-    },
-    {
-      detail: sessionCount > 0 ? `${sessionCount} active HLS sessions` : 'No active HLS sessions',
-      icon: sessionCount > 0 ? <Zap aria-hidden="true" size={15} /> : <Info aria-hidden="true" size={15} />,
-      label: 'Streaming sessions',
-      status: sessionCount > 0 ? ('live' as const) : ('idle' as const)
-    }
-  ];
+function HealthPanel({ healthState }: { healthState: DashboardHealthQueryState }) {
+  const summary = summarizeHealth(healthState);
 
   return (
     <Card
       title={<h2>System health</h2>}
-      subtitle="Condensed API status"
-      actions={<Badge tone={rows.some((row) => row.status === 'warn') ? 'warn' : 'ok'}>Live</Badge>}
+      subtitle="Backend health checks"
+      actions={
+        <Button
+          onClick={healthState.refresh}
+          loading={healthState.status === 'loading'}
+          startIcon={<RefreshCw aria-hidden="true" size={14} />}
+          variant="secondary"
+        >
+          Refresh health
+        </Button>
+      }
       padded={false}
     >
       <div className="ctv-health-panel">
-        {rows.map((row) => (
-          <div className="ctv-health-row" key={row.label}>
-            <span className={`ctv-health-icon ctv-health-icon-${row.status}`}>{row.icon}</span>
-            <strong>{row.label}</strong>
-            <span>{row.detail}</span>
-            <StatusDot status={row.status} />
+        {healthState.status === 'loading' && (
+          <div className="ctv-health-row">
+            <span className="ctv-health-icon ctv-health-icon-idle">
+              <Spinner size={15} tone="muted" />
+            </span>
+            <strong>Health checks</strong>
+            <span>Loading current health</span>
+            <StatusDot status="idle" />
           </div>
-        ))}
+        )}
+        {healthState.status === 'error' && (
+          <div className="ctv-health-row">
+            <span className="ctv-health-icon ctv-health-icon-error">
+              <TriangleAlert aria-hidden="true" size={15} />
+            </span>
+            <strong>Health checks</strong>
+            <span>{healthState.error}</span>
+            <StatusDot status="error" />
+          </div>
+        )}
+        {healthState.status === 'success' && healthState.checks.length === 0 && (
+          <div className="ctv-health-row">
+            <span className="ctv-health-icon ctv-health-icon-idle">
+              <Info aria-hidden="true" size={15} />
+            </span>
+            <strong>Health checks</strong>
+            <span>No health checks returned</span>
+            <StatusDot status="idle" />
+          </div>
+        )}
+        {healthState.status === 'success' && healthState.checks.map((check) => {
+          const rowStatus = healthIconStatus(check.status);
+
+          return (
+            <div className="ctv-health-row" key={check.title}>
+              <span className={`ctv-health-icon ctv-health-icon-${rowStatus}`}>{healthIcon(check.status)}</span>
+              <strong>{check.title}</strong>
+              <span>{check.detail}</span>
+              <StatusDot status={rowStatus} />
+            </div>
+          );
+        })}
+      </div>
+      <div className="ctv-health-summary">
+        <StatusDot status={summary.status} label={summary.label} />
       </div>
     </Card>
   );
 }
 
-function RecentActivity({
-  channelCount,
-  collectionCount,
-  sessionCount
+function DashboardScreen({
+  healthState
 }: {
-  channelCount: number;
-  collectionCount: number;
-  sessionCount: number;
+  healthState: DashboardHealthQueryState;
 }) {
-  const items = [
-    {
-      icon: <Tv aria-hidden="true" size={13} />,
-      label: 'Channels',
-      text: `Loaded ${channelCount} channels from /api/channels`,
-      time: 'now',
-      tone: 'accent' as const
-    },
-    {
-      icon: <Radio aria-hidden="true" size={13} />,
-      label: 'Sessions',
-      text: `${sessionCount} active streaming sessions reported`,
-      time: 'live',
-      tone: sessionCount > 0 ? ('accent' as const) : ('neutral' as const)
-    },
-    {
-      icon: <FolderTree aria-hidden="true" size={13} />,
-      label: 'Media',
-      text: `${collectionCount} collections available to schedules`,
-      time: 'api',
-      tone: 'neutral' as const
-    }
-  ];
-
-  return (
-    <Card title={<h2>Recent activity</h2>} subtitle="API-backed dashboard events" padded={false}>
-      <div className="ctv-activity-feed">
-        {items.map((item) => (
-          <div className="ctv-activity-row" key={item.label}>
-            <span className="ctv-activity-icon">{item.icon}</span>
-            <Tag tone={item.tone}>{item.label}</Tag>
-            <span>{item.text}</span>
-            <code>{item.time}</code>
-          </div>
-        ))}
-      </div>
-    </Card>
-  );
-}
-
-function ReleaseNotes({ appVersion, apiVersion }: { appVersion: string | null; apiVersion: number }) {
-  const [open, setOpen] = useState(false);
-
-  return (
-    <Card>
-      <button type="button" className="ctv-release-toggle" onClick={() => setOpen((current) => !current)}>
-        <Sparkles aria-hidden="true" size={15} />
-        <strong>Release notes</strong>
-        <code>{appVersion ?? 'unknown'}</code>
-        <ChevronDown aria-hidden="true" size={14} />
-      </button>
-      {open && (
-        <div className="ctv-release-body">
-          <p>Running ChicoryTV app version {appVersion ?? 'unknown'} against REST API v{apiVersion}.</p>
-          <p>Release-note content will use the server release feed when it is exposed through the REST API.</p>
-        </div>
-      )}
-    </Card>
-  );
-}
-
-function DashboardScreen() {
   const dashboardQuery = useDashboardQuery();
 
   if (dashboardQuery.status === 'loading') {
@@ -636,45 +701,39 @@ function DashboardScreen() {
     return <DashboardErrorState error={dashboardQuery.error} />;
   }
 
-  const { channels, collections, schedules, sessions, version } = dashboardQuery.data;
-  const onAirChannels = channels.slice(0, 4);
+  const { channels, channelStates, mediaSources, playouts } = dashboardQuery.data;
+  const channelsById = new Map(channels.map((channel) => [channel.id, channel]));
+  const onAirStates = channelStates.filter((state) => state.onAir).slice(0, 4);
+  const playoutCount = playouts.totalCount;
+  const libraryCount = mediaSources.reduce((count, source) => count + source.libraries.length, 0);
 
   return (
     <div className="ctv-screen-stack">
       <section className="ctv-stat-row" aria-label="At a glance">
         <Stat label="Channels" value={channels.length} icon={<Tv aria-hidden="true" size={15} />} />
-        <Stat label="Active playouts" value={schedules.length} icon={<ListVideo aria-hidden="true" size={15} />} />
-        <Stat label="Transcodes" value={sessions.length} icon={<Radio aria-hidden="true" size={15} />} delta={sessions.length > 0 ? 'streaming' : 'idle'} deltaTone="neutral" />
-        <Stat label="Libraries" value={collections.length} icon={<Library aria-hidden="true" size={15} />} />
+        <Stat label="Active playouts" value={playoutCount} icon={<ListVideo aria-hidden="true" size={15} />} />
+        <Stat label="On air" value={onAirStates.length} icon={<Radio aria-hidden="true" size={15} />} />
+        <Stat label="Libraries" value={libraryCount} icon={<Library aria-hidden="true" size={15} />} />
       </section>
 
       <section className="ctv-dashboard-grid">
         <Card
           title={<h2>On air now</h2>}
           subtitle="Current programmes by channel"
-          actions={<Badge tone="accent" dot>{sessions.length} streaming</Badge>}
+          actions={<Badge tone="accent" dot>{onAirStates.length} on air</Badge>}
         >
           <div className="ctv-onair-grid">
-            {onAirChannels.length > 0 ? (
-              onAirChannels.map((channel, index) => (
-                <OnAirCard channel={channel} index={index} key={channel.id} />
+            {onAirStates.length > 0 ? (
+              onAirStates.map((state) => (
+                <OnAirCard channel={channelsById.get(state.channelId) ?? null} state={state} key={state.channelId} />
               ))
             ) : (
-              <div className="ctv-dashboard-empty">No channels found</div>
+              <div className="ctv-dashboard-empty">No on-air channels reported</div>
             )}
           </div>
         </Card>
 
-        <HealthPanel channelCount={channels.length} sessionCount={sessions.length} apiVersion={version.apiVersion} />
-      </section>
-
-      <section className="ctv-dashboard-grid">
-        <RecentActivity
-          channelCount={channels.length}
-          collectionCount={collections.length}
-          sessionCount={sessions.length}
-        />
-        <ReleaseNotes appVersion={version.appVersion} apiVersion={version.apiVersion} />
+        <HealthPanel healthState={healthState} />
       </section>
     </div>
   );
@@ -725,13 +784,19 @@ function NotFoundScreen() {
   );
 }
 
-function ScreenContent({ route }: { route: ScreenRoute | null }) {
+function ScreenContent({
+  healthState,
+  route
+}: {
+  healthState: DashboardHealthQueryState;
+  route: ScreenRoute | null;
+}) {
   if (route === null) {
     return <NotFoundScreen />;
   }
 
   if (route.id === 'dashboard') {
-    return <DashboardScreen />;
+    return <DashboardScreen healthState={healthState} />;
   }
 
   return <PlaceholderScreen route={route} />;
@@ -740,6 +805,7 @@ function ScreenContent({ route }: { route: ScreenRoute | null }) {
 export function App() {
   const [theme, setTheme] = useState<DesignSystemThemeId>(() => getStoredDesignSystemTheme());
   const [activeRoute, setActiveRoute] = useState<ScreenRoute | null>(() => routeFromLocation());
+  const healthState = useDashboardHealthQuery();
 
   useEffect(() => {
     applyDesignSystemTheme(theme);
@@ -772,12 +838,12 @@ export function App() {
 
   return (
     <div className="ctv-app-shell">
-      <Sidebar activeRoute={route} onNavigate={navigate} />
+      <Sidebar activeRoute={route} healthState={healthState} onNavigate={navigate} />
       <div className="ctv-shell-body">
         <TopBar route={route} />
         <main className="ctv-main">
           <ThemeSwitcher theme={theme} onThemeChange={setTheme} />
-          <ScreenContent route={route} />
+          <ScreenContent healthState={healthState} route={route} />
         </main>
       </div>
     </div>
diff --git a/web/src/api/dashboard.ts b/web/src/api/dashboard.ts
index 756398c2a..e45c2bc67 100644
--- a/web/src/api/dashboard.ts
+++ b/web/src/api/dashboard.ts
@@ -1,36 +1,58 @@
-import { useEffect, useState } from 'react';
+import { useCallback, useEffect, useRef, useState } from 'react';
 import { ApiError, request } from './client';
 import type { components } from './generated/v1';
 
 export type DashboardChannel = components['schemas']['ChannelResponseModel'];
-type DashboardCollection = components['schemas']['MediaCollectionViewModel'];
-type DashboardSchedule = components['schemas']['ProgramScheduleViewModel'];
-type DashboardSession = components['schemas']['HlsSessionModel'];
-type DashboardVersion = components['schemas']['CombinedVersion'];
+export type DashboardChannelState = components['schemas']['ChannelStateResponseModel'];
+type DashboardHealthCheck = components['schemas']['HealthCheckResponseModel'];
+type DashboardMediaSource = components['schemas']['MediaSourceResponseModel'];
+type DashboardPlayouts = components['schemas']['PagedPlayoutsResponseModel'];
+export type DashboardVersion = components['schemas']['CombinedVersion'];
 
 export interface DashboardData {
   channels: DashboardChannel[];
-  collections: DashboardCollection[];
-  schedules: DashboardSchedule[];
-  sessions: DashboardSession[];
-  version: DashboardVersion;
+  channelStates: DashboardChannelState[];
+  mediaSources: DashboardMediaSource[];
+  playouts: DashboardPlayouts;
 }
 
-type DashboardQueryState =
+export type DashboardQueryState =
   | { data: DashboardData; error: null; status: 'success' }
   | { data: null; error: string; status: 'error' }
   | { data: null; error: null; status: 'loading' };
 
+export type DashboardHealthQueryState =
+  | { checks: DashboardHealthCheck[]; error: null; refresh: () => void; status: 'success' }
+  | { checks: null; error: string; refresh: () => void; status: 'error' }
+  | { checks: null; error: null; refresh: () => void; status: 'loading' };
+
+export type DashboardVersionQueryState =
+  | { error: null; status: 'success'; version: DashboardVersion }
+  | { error: string; status: 'error'; version: null }
+  | { error: null; status: 'loading'; version: null };
+
+type DashboardHealthState =
+  | { checks: DashboardHealthCheck[]; error: null; status: 'success' }
+  | { checks: null; error: string; status: 'error' }
+  | { checks: null; error: null; status: 'loading' };
+
 export async function getDashboardData(): Promise<DashboardData> {
-  const [channels, collections, schedules, sessions, version] = await Promise.all([
+  const [channels, channelStates, mediaSources, playouts] = await Promise.all([
     request<DashboardChannel[]>('/api/channels'),
-    request<DashboardCollection[]>('/api/collections'),
-    request<DashboardSchedule[]>('/api/schedules'),
-    request<DashboardSession[]>('/api/sessions'),
-    request<DashboardVersion>('/api/version')
+    request<DashboardChannelState[]>('/api/channels/state'),
+    request<DashboardMediaSource[]>('/api/media-sources'),
+    request<DashboardPlayouts>('/api/playouts')
   ]);
 
-  return { channels, collections, schedules, sessions, version };
+  return { channels, channelStates, mediaSources, playouts };
+}
+
+export function getDashboardHealth(): Promise<DashboardHealthCheck[]> {
+  return request<DashboardHealthCheck[]>('/api/health');
+}
+
+export function getDashboardVersion(): Promise<DashboardVersion> {
+  return request<DashboardVersion>('/api/version');
 }
 
 export function useDashboardQuery(): DashboardQueryState {
@@ -63,6 +85,87 @@ export function useDashboardQuery(): DashboardQueryState {
   return state;
 }
 
+export function useDashboardHealthQuery(): DashboardHealthQueryState {
+  const [state, setState] = useState<DashboardHealthState>({
+    checks: null,
+    error: null,
+    status: 'loading'
+  });
+
+  const activeRef = useRef(true);
+
+  useEffect(() => {
+    activeRef.current = true;
+
+    return () => {
+      activeRef.current = false;
+    };
+  }, []);
+
+  const loadHealth = useCallback(() => {
+    getDashboardHealth()
+      .then((checks) => {
+        if (activeRef.current) {
+          setState({ checks, error: null, status: 'success' });
+        }
+      })
+      .catch((error: unknown) => {
+        if (activeRef.current) {
+          setState({ checks: null, error: messageFromError(error), status: 'error' });
+        }
+      });
+  }, []);
+
+  const refresh = useCallback(() => {
+    setState({ checks: null, error: null, status: 'loading' });
+    loadHealth();
+  }, [loadHealth]);
+
+  useEffect(() => {
+    loadHealth();
+  }, [loadHealth]);
+
+  if (state.status === 'success') {
+    return { checks: state.checks, error: null, refresh, status: 'success' };
+  }
+
+  if (state.status === 'error') {
+    return { checks: null, error: state.error, refresh, status: 'error' };
+  }
+
+  return { checks: null, error: null, refresh, status: 'loading' };
+}
+
+export function useDashboardVersionQuery(): DashboardVersionQueryState {
+  const [state, setState] = useState<DashboardVersionQueryState>({
+    error: null,
+    status: 'loading',
+    version: null
+  });
+
+  useEffect(() => {
+    let active = true;
+
+    getDashboardVersion()
+      .then((version) => {
+        if (active) {
+          setState({ error: null, status: 'success', version });
+        }
+      })
+      .catch((error: unknown) => {
+        if (active) {
+          setState({ error: messageFromError(error), status: 'error', version: null });
+        }
+      });
+
+    return () => {
+      active = false;
+    };
+  }, []);
+
+  return state;
+}
+
 function messageFromError(error: unknown): string {
   if (error instanceof ApiError) {
     return error.detail ?? error.message;
diff --git a/web/src/shell.css b/web/src/shell.css
index b8df3018d..fcedceadd 100644
--- a/web/src/shell.css
+++ b/web/src/shell.css
@@ -442,7 +442,6 @@
 }
 
 .ctv-onair-head code,
-.ctv-activity-list code,
 .ctv-live-channel-row code {
   color: var(--text-secondary);
   font-family: var(--font-mono, ui-monospace, monospace);
@@ -516,8 +515,7 @@
   gap: var(--space-7, 16px);
 }
 
-.ctv-health-panel,
-.ctv-activity-feed {
+.ctv-health-panel {
   display: grid;
 }
 
@@ -535,8 +533,7 @@
   border-top: 0;
 }
 
-.ctv-health-icon,
-.ctv-activity-icon {
+.ctv-health-icon {
   width: 24px;
   height: 24px;
   display: inline-flex;
@@ -555,6 +552,14 @@
   color: var(--status-warn);
 }
 
+.ctv-health-icon-error {
+  color: var(--status-error);
+}
+
+.ctv-health-icon-idle {
+  color: var(--text-secondary);
+}
+
 .ctv-health-icon-live {
   color: var(--status-live);
 }
@@ -571,67 +576,11 @@
   white-space: nowrap;
 }
 
-.ctv-activity-row {
-  min-height: 44px;
-  display: grid;
-  grid-template-columns: auto auto minmax(0, 1fr) auto;
-  align-items: center;
-  gap: var(--space-4, 8px);
+.ctv-health-summary {
+  display: flex;
+  justify-content: flex-end;
   border-top: 1px solid var(--border-hairline);
-  padding: 0 var(--space-6, 12px);
-}
-
-.ctv-activity-row:first-child {
-  border-top: 0;
-}
-
-.ctv-activity-row > span:nth-child(3) {
-  overflow: hidden;
-  color: var(--text-primary);
-  text-overflow: ellipsis;
-  white-space: nowrap;
-}
-
-.ctv-activity-row code,
-.ctv-release-toggle code {
-  color: var(--text-disabled);
-  font-family: var(--font-mono, ui-monospace, monospace);
-  font-size: var(--text-2xs, 11px);
-}
-
-.ctv-release-toggle {
-  width: 100%;
-  display: grid;
-  grid-template-columns: auto auto minmax(0, 1fr) auto;
-  align-items: center;
-  gap: var(--space-4, 8px);
-  border: 0;
-  background: transparent;
-  color: var(--text-primary);
-  cursor: pointer;
-  padding: 0;
-  text-align: left;
-}
-
-.ctv-release-toggle svg:first-child {
-  color: var(--action-primary);
-}
-
-.ctv-release-toggle code {
-  justify-self: end;
-}
-
-.ctv-release-body {
-  display: grid;
-  gap: var(--space-3, 6px);
-  margin-top: var(--space-6, 12px);
-  color: var(--text-secondary);
-  font-size: var(--text-xs, 12px);
-  line-height: 1.45;
-}
-
-.ctv-release-body p {
-  margin: 0;
+  padding: var(--space-4, 8px) var(--space-6, 12px);
 }
 
 .ctv-live-channel-body {