feature: version one notification feature implemented.

frontend/src/app/[locale]/(dashboard)/layout.tsx

@@ -9,7 +9,9 @@ import { storeAuthRedirectFromPath } from '@/lib/auth/postAuthRedirect';
 import Sidebar from '@/components/ui/shared/Sidebar';
 import { TopBarControls } from '@/components/ui/shared/TopBarControls';
 import { DashboardAccountMenu } from '@/components/ui/dashboard/DashboardAccountMenu';
+import { NotificationBell } from '@/components/ui/notifications/NotificationBell';
 import { ToastProvider } from '@/components/ui/shared/ToastProvider';
+import { RealtimeProvider } from '@/lib/realtime/RealtimeProvider';
 import {
   canAccessDashboardRoute,
   firstAccessibleDashboardPath,
@@ -87,6 +89,7 @@ export default function DashboardLayout({ children }: { children: React.ReactNod
 
   return (
     <ToastProvider>
+      <RealtimeProvider>
       <div className="app-dashboard-shell flex h-[100dvh] app-web-bg text-text-primary">
       {sidebarOpen ? (
         <button
@@ -112,6 +115,7 @@ export default function DashboardLayout({ children }: { children: React.ReactNod
         </main>
       </div>
       </div>
+      </RealtimeProvider>
     </ToastProvider>
   );
 }
@@ -141,6 +145,7 @@ const DashboardHeader = memo(function DashboardHeader({
 
       <div className="flex items-center gap-2 sm:gap-3 shrink-0">
         <TopBarControls />
+        <NotificationBell />
         <DashboardAccountMenu />
       </div>
     </header>

frontend/src/app/[locale]/(dashboard)/notifications/page.tsx

@@ -0,0 +1,7 @@
+'use client';
+
+import { NotificationsPage } from '@/components/ui/notifications/NotificationsPage';
+
+export default function NotificationsRoutePage() {
+  return <NotificationsPage />;
+}

frontend/src/app/[locale]/(dashboard)/treatment/page.tsx

@@ -10,6 +10,7 @@ export default function TreatmentPage() {
   const { user, currentOrganization, isAuthReady } = useAuth();
   const searchParams = useSearchParams();
   const initialAppointmentId = searchParams.get('appointmentId');
+  const initialLabCaseId = searchParams.get('labCaseId');
 
   if (!isAuthReady || !user) {
     return (
@@ -22,6 +23,7 @@ export default function TreatmentPage() {
       userId={user.id}
       currentOrganization={currentOrganization}
       initialAppointmentId={initialAppointmentId}
+      initialLabCaseId={initialLabCaseId}
     />
   );
 }