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/lib/roles.ts

@@ -0,0 +1,100 @@
+/**
+ * Role-based Access System for Admin v2
+ *
+ * Roles determine which categories and modules are visible
+ */
+
+import { CategoryId } from './navigation'
+
+export type RoleId = 'developer' | 'manager' | 'auditor' | 'dsb'
+
+export interface Role {
+  id: RoleId
+  name: string
+  description: string
+  icon: string
+  visibleCategories: CategoryId[]
+  color: string
+}
+
+export const roles: Role[] = [
+  {
+    id: 'developer',
+    name: 'Entwickler',
+    description: 'Voller Zugriff auf alle Bereiche',
+    icon: 'code',
+    visibleCategories: ['dsgvo', 'compliance', 'ai', 'infrastructure', 'education', 'communication', 'development'],
+    color: 'bg-primary-100 border-primary-300 text-primary-700',
+  },
+  {
+    id: 'manager',
+    name: 'Manager',
+    description: 'Executive Uebersicht',
+    icon: 'chart',
+    visibleCategories: ['dsgvo', 'compliance', 'communication'],
+    color: 'bg-blue-100 border-blue-300 text-blue-700',
+  },
+  {
+    id: 'auditor',
+    name: 'Auditor',
+    description: 'Compliance Pruefung',
+    icon: 'clipboard',
+    visibleCategories: ['dsgvo', 'compliance'],
+    color: 'bg-amber-100 border-amber-300 text-amber-700',
+  },
+  {
+    id: 'dsb',
+    name: 'DSB',
+    description: 'Datenschutzbeauftragter',
+    icon: 'shield',
+    visibleCategories: ['dsgvo', 'compliance'],
+    color: 'bg-purple-100 border-purple-300 text-purple-700',
+  },
+]
+
+// Storage key for localStorage
+const ROLE_STORAGE_KEY = 'admin-v2-selected-role'
+
+// Get role by ID
+export function getRoleById(id: RoleId): Role | undefined {
+  return roles.find(role => role.id === id)
+}
+
+// Check if category is visible for a role
+export function isCategoryVisibleForRole(categoryId: CategoryId, roleId: RoleId): boolean {
+  const role = getRoleById(roleId)
+  return role ? role.visibleCategories.includes(categoryId) : false
+}
+
+// Get stored role from localStorage (client-side only)
+export function getStoredRole(): RoleId | null {
+  if (typeof window === 'undefined') return null
+  const stored = localStorage.getItem(ROLE_STORAGE_KEY)
+  if (stored && roles.some(r => r.id === stored)) {
+    return stored as RoleId
+  }
+  return null
+}
+
+// Store role in localStorage
+export function storeRole(roleId: RoleId): void {
+  if (typeof window === 'undefined') return
+  localStorage.setItem(ROLE_STORAGE_KEY, roleId)
+}
+
+// Clear stored role
+export function clearStoredRole(): void {
+  if (typeof window === 'undefined') return
+  localStorage.removeItem(ROLE_STORAGE_KEY)
+}
+
+// Check if this is a first-time visitor (no role stored)
+export function isFirstTimeVisitor(): boolean {
+  return getStoredRole() === null
+}
+
+// Get visible categories for a role
+export function getVisibleCategoriesForRole(roleId: RoleId): CategoryId[] {
+  const role = getRoleById(roleId)
+  return role ? role.visibleCategories : []
+}