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/components/layout/Header.tsx

@@ -0,0 +1,76 @@
+'use client'
+
+import { usePathname } from 'next/navigation'
+import { navigation, metaModules, getModuleByHref } from '@/lib/navigation'
+
+interface HeaderProps {
+  title?: string
+  description?: string
+}
+
+export function Header({ title, description }: HeaderProps) {
+  const pathname = usePathname()
+
+  // Auto-detect title and description from navigation
+  let pageTitle = title
+  let pageDescription = description
+
+  if (!pageTitle) {
+    // Check meta modules first
+    const metaModule = metaModules.find(m => pathname === m.href || pathname.startsWith(m.href + '/'))
+    if (metaModule) {
+      pageTitle = metaModule.name
+      pageDescription = metaModule.description
+    } else {
+      // Check navigation modules
+      const result = getModuleByHref(pathname)
+      if (result) {
+        pageTitle = result.module.name
+        pageDescription = result.module.description
+      } else {
+        // Check category pages
+        const category = navigation.find(cat => pathname === `/${cat.id}`)
+        if (category) {
+          pageTitle = category.name
+          pageDescription = category.description
+        }
+      }
+    }
+  }
+
+  return (
+    <header className="h-16 bg-white border-b border-slate-200 flex items-center px-6 sticky top-0 z-10">
+      <div className="flex-1">
+        {pageTitle && <h1 className="text-xl font-semibold text-slate-900">{pageTitle}</h1>}
+        {pageDescription && <p className="text-sm text-slate-500">{pageDescription}</p>}
+      </div>
+
+      {/* Search */}
+      <div className="flex items-center gap-4">
+        <div className="relative">
+          <input
+            type="text"
+            placeholder="Suchen... (Ctrl+K)"
+            className="w-64 pl-10 pr-4 py-2 bg-slate-100 border border-transparent rounded-lg text-sm focus:bg-white focus:border-primary-300 focus:outline-none transition-colors"
+          />
+          <svg
+            className="w-4 h-4 absolute left-3 top-1/2 -translate-y-1/2 text-slate-400"
+            fill="none"
+            stroke="currentColor"
+            viewBox="0 0 24 24"
+          >
+            <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M21 21l-6-6m2-5a7 7 0 11-14 0 7 7 0 0114 0z" />
+          </svg>
+        </div>
+
+        {/* User Area */}
+        <div className="flex items-center gap-3">
+          <span className="text-sm text-slate-500">Admin v2</span>
+          <div className="w-8 h-8 rounded-full bg-primary-600 flex items-center justify-center text-white text-sm font-medium">
+            A
+          </div>
+        </div>
+      </div>
+    </header>
+  )
+}