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/common/Breadcrumbs.tsx

@@ -0,0 +1,73 @@
+'use client'
+
+import Link from 'next/link'
+import { usePathname } from 'next/navigation'
+import { navigation, metaModules, getModuleByHref, getCategoryById, CategoryId } from '@/lib/navigation'
+
+export function Breadcrumbs() {
+  const pathname = usePathname()
+
+  // Build breadcrumb items from path
+  const items: Array<{ label: string; href: string }> = []
+
+  // Always start with Dashboard (Home)
+  items.push({ label: 'Dashboard', href: '/dashboard' })
+
+  // Parse the path
+  const pathParts = pathname.split('/').filter(Boolean)
+
+  if (pathParts.length > 0) {
+    // Check if it's a category
+    const categoryId = pathParts[0] as CategoryId
+    const category = getCategoryById(categoryId)
+
+    if (category) {
+      // Add category
+      items.push({ label: category.name, href: `/${category.id}` })
+
+      // Check if there's a module
+      if (pathParts.length > 1) {
+        const moduleHref = `/${pathParts[0]}/${pathParts[1]}`
+        const result = getModuleByHref(moduleHref)
+        if (result) {
+          items.push({ label: result.module.name, href: moduleHref })
+        }
+      }
+    } else {
+      // Check meta modules
+      const metaModule = metaModules.find(m => m.href === `/${pathParts[0]}`)
+      if (metaModule) {
+        items.push({ label: metaModule.name, href: metaModule.href })
+      }
+    }
+  }
+
+  // Don't show breadcrumbs for just dashboard
+  if (items.length <= 1) {
+    return null
+  }
+
+  return (
+    <nav className="flex items-center gap-2 text-sm text-slate-500 mb-4">
+      {items.map((item, index) => (
+        <span key={item.href} className="flex items-center gap-2">
+          {index > 0 && (
+            <svg className="w-4 h-4 text-slate-300" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+              <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M9 5l7 7-7 7" />
+            </svg>
+          )}
+          {index === items.length - 1 ? (
+            <span className="text-slate-900 font-medium">{item.label}</span>
+          ) : (
+            <Link
+              href={item.href}
+              className="hover:text-primary-600 transition-colors"
+            >
+              {item.label}
+            </Link>
+          )}
+        </span>
+      ))}
+    </nav>
+  )
+}