feat: Website-Scan tab in agent UI — service table, SOLL/IST, corrections

- Tab system: Schnellanalyse (single page) + Website-Scan (multi-page)
- ScanResult component: service comparison table, severity-colored findings
- Expandable correction suggestions with copy button (pre-launch mode)
- API proxy route for /agent/scan endpoint

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

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

@@ -0,0 +1,38 @@
+/**
+ * Agent Scan API Proxy
+ * POST /api/sdk/v1/agent/scan → backend-compliance /api/compliance/agent/scan
+ */
+
+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/scan`, {
+      method: 'POST',
+      headers: { 'Content-Type': 'application/json' },
+      body,
+      signal: AbortSignal.timeout(180000), // 3 min — multi-page scan + LLM
+    })
+
+    if (!response.ok) {
+      const errorText = await response.text()
+      return NextResponse.json(
+        { error: `Backend: ${response.status}`, detail: errorText },
+        { status: response.status }
+      )
+    }
+
+    const data = await response.json()
+    return NextResponse.json(data)
+  } catch (error) {
+    console.error('Agent scan proxy error:', error)
+    return NextResponse.json(
+      { error: 'Scan fehlgeschlagen oder Timeout' },
+      { status: 503 }
+    )
+  }
+}