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/sdk/__tests__/StepHeader.test.tsx

@@ -0,0 +1,127 @@
+import { describe, it, expect } from 'vitest'
+import { STEP_EXPLANATIONS } from '../StepHeader'
+
+// Focus on testing the STEP_EXPLANATIONS data structure
+// Component tests require more complex SDK context mocking
+
+describe('STEP_EXPLANATIONS', () => {
+  it('should have explanations for all Phase 1 steps', () => {
+    const phase1Steps = [
+      'use-case-workshop',
+      'screening',
+      'modules',
+      'requirements',
+      'controls',
+      'evidence',
+      'audit-checklist',
+      'risks',
+    ]
+
+    phase1Steps.forEach(stepId => {
+      expect(STEP_EXPLANATIONS[stepId]).toBeDefined()
+      expect(STEP_EXPLANATIONS[stepId].title).toBeDefined()
+      expect(STEP_EXPLANATIONS[stepId].title.length).toBeGreaterThan(0)
+      expect(STEP_EXPLANATIONS[stepId].description).toBeDefined()
+      expect(STEP_EXPLANATIONS[stepId].description.length).toBeGreaterThan(0)
+      expect(STEP_EXPLANATIONS[stepId].explanation).toBeDefined()
+      expect(STEP_EXPLANATIONS[stepId].explanation.length).toBeGreaterThan(0)
+    })
+  })
+
+  it('should have explanations for all Phase 2 steps', () => {
+    const phase2Steps = [
+      'ai-act',
+      'obligations',
+      'dsfa',
+      'tom',
+      'loeschfristen',
+      'vvt',
+      'consent',
+      'cookie-banner',
+      'einwilligungen',
+      'dsr',
+      'escalations',
+    ]
+
+    phase2Steps.forEach(stepId => {
+      expect(STEP_EXPLANATIONS[stepId]).toBeDefined()
+      expect(STEP_EXPLANATIONS[stepId].title).toBeDefined()
+      expect(STEP_EXPLANATIONS[stepId].description).toBeDefined()
+    })
+  })
+
+  it('should have tips array for each step explanation', () => {
+    Object.entries(STEP_EXPLANATIONS).forEach(([stepId, explanation]) => {
+      expect(explanation.tips).toBeDefined()
+      expect(Array.isArray(explanation.tips)).toBe(true)
+      expect(explanation.tips.length).toBeGreaterThan(0)
+    })
+  })
+
+  it('should have valid tip icons', () => {
+    const validIcons = ['info', 'warning', 'success', 'lightbulb']
+
+    Object.entries(STEP_EXPLANATIONS).forEach(([stepId, explanation]) => {
+      explanation.tips.forEach((tip, tipIndex) => {
+        expect(validIcons).toContain(tip.icon)
+        expect(tip.title).toBeDefined()
+        expect(tip.title.length).toBeGreaterThan(0)
+        expect(tip.description).toBeDefined()
+        expect(tip.description.length).toBeGreaterThan(0)
+      })
+    })
+  })
+
+  it('should have a use-case-workshop explanation', () => {
+    const ucWorkshop = STEP_EXPLANATIONS['use-case-workshop']
+
+    expect(ucWorkshop.title).toContain('Use Case')
+    expect(ucWorkshop.tips.length).toBeGreaterThanOrEqual(2)
+  })
+
+  it('should have a risks explanation', () => {
+    const risks = STEP_EXPLANATIONS['risks']
+
+    expect(risks.title).toBeDefined()
+    expect(risks.explanation).toContain('Risiko')
+  })
+
+  it('should have a dsfa explanation', () => {
+    const dsfa = STEP_EXPLANATIONS['dsfa']
+
+    expect(dsfa.title).toContain('Datenschutz')
+    expect(dsfa.explanation.length).toBeGreaterThan(50)
+  })
+
+  it('should cover all 19 SDK steps', () => {
+    const allStepIds = [
+      // Phase 1
+      'use-case-workshop',
+      'screening',
+      'modules',
+      'requirements',
+      'controls',
+      'evidence',
+      'audit-checklist',
+      'risks',
+      // Phase 2
+      'ai-act',
+      'obligations',
+      'dsfa',
+      'tom',
+      'loeschfristen',
+      'vvt',
+      'consent',
+      'cookie-banner',
+      'einwilligungen',
+      'dsr',
+      'escalations',
+    ]
+
+    expect(Object.keys(STEP_EXPLANATIONS).length).toBe(allStepIds.length)
+
+    allStepIds.forEach(stepId => {
+      expect(STEP_EXPLANATIONS[stepId]).toBeDefined()
+    })
+  })
+})