feat: Unified Compliance-Check — 8 document types in one form

New 3-tab structure: Website-Scan, Compliance-Check, Banner-Check.

Compliance-Check Tab (replaces Dokumenten-Pruefung + Impressum-Check):
- 8 document rows: DSI, Impressum, Social Media, Cookie, AGB,
  Nutzungsbedingungen, Widerruf, DSB-Kontakt
- Each row: URL input + "Text laden" + file upload + manual text
- "Text laden" extracts via consent-tester, shows in editable textarea
- User verifies/corrects text before checking
- Empty fields = "not present" → own finding

Business Profiler (business_profiler.py):
- Detects B2B/B2C/B2G from all documents together
- Recognizes regulated professions, online shops, editorial content
- Context-aware: INFO checks become PASS/FAIL based on profile

Backend: /compliance-check + /extract-text endpoints
Frontend: ComplianceCheckTab.tsx + DocumentRow.tsx
API proxies: compliance-check/route.ts + extract-text/route.ts

Also: Impressum regex fixes (Telefon, AG, Geschaeftsfuehrung)
and INFO severity for context-dependent checks.

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

admin-compliance/app/api/sdk/v1/agent/compliance-check/route.ts

@@ -0,0 +1,39 @@
+/**
+ * Unified Compliance Check Proxy
+ * POST: start check for all documents, GET: poll status
+ */
+
+import { NextRequest, NextResponse } from 'next/server'
+
+const BACKEND_URL = process.env.BACKEND_API_URL || 'http://backend-compliance:8002'
+
+export async function POST(request: NextRequest) {
+  try {
+    const body = await request.text()
+    const response = await fetch(`${BACKEND_URL}/api/compliance/agent/compliance-check`, {
+      method: 'POST',
+      headers: { 'Content-Type': 'application/json' },
+      body,
+      signal: AbortSignal.timeout(30000),
+    })
+    const data = await response.json()
+    return NextResponse.json(data, { status: response.status })
+  } catch (error) {
+    return NextResponse.json({ error: 'Pruefung konnte nicht gestartet werden' }, { status: 503 })
+  }
+}
+
+export async function GET(request: NextRequest) {
+  const checkId = request.nextUrl.searchParams.get('check_id')
+  if (!checkId) return NextResponse.json({ error: 'check_id required' }, { status: 400 })
+  try {
+    const response = await fetch(
+      `${BACKEND_URL}/api/compliance/agent/compliance-check/${checkId}`,
+      { signal: AbortSignal.timeout(10000) },
+    )
+    const data = await response.json()
+    return NextResponse.json(data)
+  } catch {
+    return NextResponse.json({ error: 'Status-Abfrage fehlgeschlagen' }, { status: 503 })
+  }
+}