feat: complete MVP foundation auth and dashboard

app/dashboard/audits/page.tsx

@@ -0,0 +1,10 @@
+import { DashboardPlaceholderPage } from "@/components/dashboard-placeholder-page";
+
+export default function AuditsPage() {
+  return (
+    <DashboardPlaceholderPage
+      description="Audit-Review, Screenshots und oeffentliche Freigaben folgen in TASK-12 und TASK-13."
+      title="Audits"
+    />
+  );
+}