feat: statusbalk met versie en builddatum

Voegt sticky statusbalk toe aan de onderkant van de app met:
- Copyright melding
- App-versie uit package.json (NEXT_PUBLIC_APP_VERSION)
- Builddatum ingesteld op het moment van de build (NEXT_PUBLIC_BUILD_DATE)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

app/(app)/layout.tsx

@@ -4,6 +4,7 @@ import { getIronSession } from 'iron-session'
 import { SessionData, sessionOptions } from '@/lib/session'
 import { NavBar } from '@/components/shared/nav-bar'
 import { MinWidthBanner } from '@/components/shared/min-width-banner'
+import { StatusBar } from '@/components/shared/status-bar'
 
 export default async function AppLayout({ children }: { children: React.ReactNode }) {
   const session = await getIronSession<SessionData>(await cookies(), sessionOptions)
@@ -19,9 +20,10 @@ export default async function AppLayout({ children }: { children: React.ReactNod
       </a>
       <NavBar isDemo={session.isDemo} />
       <MinWidthBanner />
-      <main id="main-content" className="flex-1 flex flex-col">
+      <main id="main-content" className="flex-1 flex flex-col overflow-hidden">
         {children}
       </main>
+      <StatusBar />
     </div>
   )
 }