feat: EU AI Database Registration (Art. 49) — Backend + Frontend

Backend (Go):
- DB Migration 023: ai_system_registrations Tabelle
- RegistrationStore: CRUD + Status-Management + Export-JSON
- RegistrationHandlers: 7 Endpoints (Create, List, Get, Update, Status, Prefill, Export)
- Routes in main.go: /sdk/v1/ai-registration/*

Frontend (Next.js):
- 6-Step Wizard: Anbieter → System → Klassifikation → Konformitaet → Trainingsdaten → Pruefung
- System-Karten mit Status-Badges (Entwurf/Bereit/Eingereicht/Registriert)
- JSON-Export fuer EU-Datenbank-Submission
- Status-Workflow: draft → ready → submitted → registered
- API Proxy Routes

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

admin-compliance/app/api/sdk/v1/ai-registration/[id]/route.ts

@@ -0,0 +1,47 @@
+import { NextRequest, NextResponse } from 'next/server'
+
+const SDK_URL = process.env.SDK_URL || 'http://ai-compliance-sdk:8090'
+
+export async function GET(request: NextRequest, { params }: { params: Promise<{ id: string }> }) {
+  try {
+    const { id } = await params
+    const resp = await fetch(`${SDK_URL}/sdk/v1/ai-registration/${id}`)
+    const data = await resp.json()
+    return NextResponse.json(data)
+  } catch (err) {
+    return NextResponse.json({ error: 'Failed to fetch registration' }, { status: 500 })
+  }
+}
+
+export async function PUT(request: NextRequest, { params }: { params: Promise<{ id: string }> }) {
+  try {
+    const { id } = await params
+    const tenantId = request.headers.get('x-tenant-id') || '9282a473-5c95-4b3a-bf78-0ecc0ec71d3e'
+    const body = await request.json()
+    const resp = await fetch(`${SDK_URL}/sdk/v1/ai-registration/${id}`, {
+      method: 'PUT',
+      headers: { 'Content-Type': 'application/json', 'X-Tenant-ID': tenantId },
+      body: JSON.stringify(body),
+    })
+    const data = await resp.json()
+    return NextResponse.json(data, { status: resp.status })
+  } catch (err) {
+    return NextResponse.json({ error: 'Failed to update registration' }, { status: 500 })
+  }
+}
+
+export async function PATCH(request: NextRequest, { params }: { params: Promise<{ id: string }> }) {
+  try {
+    const { id } = await params
+    const body = await request.json()
+    const resp = await fetch(`${SDK_URL}/sdk/v1/ai-registration/${id}/status`, {
+      method: 'PATCH',
+      headers: { 'Content-Type': 'application/json' },
+      body: JSON.stringify(body),
+    })
+    const data = await resp.json()
+    return NextResponse.json(data, { status: resp.status })
+  } catch (err) {
+    return NextResponse.json({ error: 'Failed to update status' }, { status: 500 })
+  }
+}

admin-compliance/app/api/sdk/v1/ai-registration/route.ts

@@ -0,0 +1,32 @@
+import { NextRequest, NextResponse } from 'next/server'
+
+const SDK_URL = process.env.SDK_URL || 'http://ai-compliance-sdk:8090'
+
+export async function GET(request: NextRequest) {
+  try {
+    const tenantId = request.headers.get('x-tenant-id') || '9282a473-5c95-4b3a-bf78-0ecc0ec71d3e'
+    const resp = await fetch(`${SDK_URL}/sdk/v1/ai-registration`, {
+      headers: { 'X-Tenant-ID': tenantId },
+    })
+    const data = await resp.json()
+    return NextResponse.json(data)
+  } catch (err) {
+    return NextResponse.json({ error: 'Failed to fetch registrations' }, { status: 500 })
+  }
+}
+
+export async function POST(request: NextRequest) {
+  try {
+    const tenantId = request.headers.get('x-tenant-id') || '9282a473-5c95-4b3a-bf78-0ecc0ec71d3e'
+    const body = await request.json()
+    const resp = await fetch(`${SDK_URL}/sdk/v1/ai-registration`, {
+      method: 'POST',
+      headers: { 'Content-Type': 'application/json', 'X-Tenant-ID': tenantId },
+      body: JSON.stringify(body),
+    })
+    const data = await resp.json()
+    return NextResponse.json(data, { status: resp.status })
+  } catch (err) {
+    return NextResponse.json({ error: 'Failed to create registration' }, { status: 500 })
+  }
+}