L7 Offline & PWA: Sync-Seite, Offline-Ansicht, Sync-Badge, Installationshinweis, Logout-Schutz

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

src/app/(field)/m/offline/layout.tsx

@@ -0,0 +1,7 @@
+import { requireModule } from "@/server/modules";
+
+/** Modul-Gate „field" für die Offline-Ansicht (Lane L7). */
+export default async function ModuleLayout({ children }: Readonly<{ children: React.ReactNode }>) {
+  await requireModule("field");
+  return <>{children}</>;
+}