fix(admin-v2): Restore complete admin-v2 application

The admin-v2 application was incomplete in the repository. This commit
restores all missing components:

- Admin pages (76 pages): dashboard, ai, compliance, dsgvo, education,
  infrastructure, communication, development, onboarding, rbac
- SDK pages (45 pages): tom, dsfa, vvt, loeschfristen, einwilligungen,
  vendor-compliance, tom-generator, dsr, and more
- Developer portal (25 pages): API docs, SDK guides, frameworks
- All components, lib files, hooks, and types
- Updated package.json with all dependencies

The issue was caused by incomplete initial repository state - the full
admin-v2 codebase existed in backend/admin-v2 and docs-src/admin-v2
but was never fully synced to the main admin-v2 directory.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

admin-v2/app/(admin)/communication/page.tsx

@@ -0,0 +1,50 @@
+'use client'
+
+import { getCategoryById } from '@/lib/navigation'
+import { ModuleCard } from '@/components/common/ModuleCard'
+import { PagePurpose } from '@/components/common/PagePurpose'
+
+export default function CommunicationPage() {
+  const category = getCategoryById('communication')
+
+  if (!category) {
+    return <div>Kategorie nicht gefunden</div>
+  }
+
+  return (
+    <div>
+      {/* Page Purpose */}
+      <PagePurpose
+        title={category.name}
+        purpose="Diese Kategorie umfasst alle Kommunikations- und Benachrichtigungsmodule. Hier ueberwachen Sie Matrix-Raeume, verwalten E-Mail-Konten und konfigurieren Alert-Feeds."
+        audience={['Admins', 'Support', 'Marketing']}
+        architecture={{
+          services: ['synapse (Matrix)', 'mailpit (Dev SMTP)', 'backend (Python)'],
+          databases: ['PostgreSQL', 'synapse-db'],
+        }}
+        collapsible={true}
+        defaultCollapsed={false}
+      />
+
+      {/* Modules Grid */}
+      <h2 className="text-lg font-semibold text-slate-900 mb-4">Module</h2>
+      <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-4">
+        {category.modules.map((module) => (
+          <ModuleCard key={module.id} module={module} category={category} />
+        ))}
+      </div>
+
+      {/* Info Section */}
+      <div className="mt-8 bg-green-50 border border-green-200 rounded-xl p-6">
+        <h3 className="font-semibold text-green-800 flex items-center gap-2">
+          <span>📬</span>
+          Ende-zu-Ende-Verschluesselung
+        </h3>
+        <p className="text-sm text-green-700 mt-2">
+          Matrix-Kommunikation ist standardmaessig Ende-zu-Ende verschluesselt.
+          Jitsi-Konferenzen werden nicht auf dem Server gespeichert (optional: Aufnahme mit Jibri).
+        </p>
+      </div>
+    </div>
+  )
+}