fix: Restore all files lost during destructive rebase

A previous `git pull --rebase origin main` dropped 177 local commits,
losing 3400+ files across admin-v2, backend, studio-v2, website,
klausur-service, and many other services. The partial restore attempt
(660295e2) only recovered some files.

This commit restores all missing files from pre-rebase ref 98933f5e
while preserving post-rebase additions (night-scheduler, night-mode UI,
NightModeWidget dashboard integration).

Restored features include:
- AI Module Sidebar (FAB), OCR Labeling, OCR Compare
- GPU Dashboard, RAG Pipeline, Magic Help
- Klausur-Korrektur (8 files), Abitur-Archiv (5+ files)
- Companion, Zeugnisse-Crawler, Screen Flow
- Full backend, studio-v2, website, klausur-service
- All compliance SDKs, agent-core, voice-service
- CI/CD configs, documentation, scripts

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

website/app/admin/pca-platform/page.tsx

@@ -0,0 +1,482 @@
+'use client'
+
+/**
+ * PCA Platform Admin Page
+ *
+ * Manages bot detection, session monitoring, and payment settings
+ * for the Person-Corporate-Agent platform.
+ */
+
+import { useState, useEffect, useCallback } from 'react'
+import AdminLayout from '@/components/admin/AdminLayout'
+
+// Types
+interface SessionMetrics {
+  session_id: string
+  score: number
+  dwell_ratio: number
+  scroll_depth: number
+  clicks: number
+  mouse_moves: number
+  action: string
+  last_update: string
+}
+
+interface ServiceStatus {
+  status: 'healthy' | 'unhealthy' | 'offline'
+  service: string
+  version: string
+  uptime?: string
+}
+
+interface PCAConfig {
+  thresholds: {
+    score_pass: number
+    score_challenge: number
+  }
+  weights: {
+    dwell_ratio: number
+    scroll_score: number
+    pointer_variance: number
+    click_rate: number
+  }
+  step_up: {
+    methods: string[]
+    primary: string
+  }
+}
+
+interface Stats {
+  activeSessions: number
+  humanScore: number
+  botScore: number
+  challengesIssued: number
+  paymentsReceived: number
+  totalRevenue: string
+}
+
+export default function PCAAdminPage() {
+  const [serviceStatus, setServiceStatus] = useState<ServiceStatus | null>(null)
+  const [config, setConfig] = useState<PCAConfig | null>(null)
+  const [sessions, setSessions] = useState<SessionMetrics[]>([])
+  const [stats, setStats] = useState<Stats>({
+    activeSessions: 0,
+    humanScore: 0,
+    botScore: 0,
+    challengesIssued: 0,
+    paymentsReceived: 0,
+    totalRevenue: '0.00 EUR'
+  })
+  const [loading, setLoading] = useState(true)
+  const [error, setError] = useState<string | null>(null)
+  const [activeTab, setActiveTab] = useState<'overview' | 'sessions' | 'config' | 'payments'>('overview')
+
+  // Fetch service status
+  const fetchStatus = useCallback(async () => {
+    try {
+      const response = await fetch('/api/admin/pca?action=status')
+      if (response.ok) {
+        const data = await response.json()
+        setServiceStatus(data)
+        setError(null)
+      } else {
+        setServiceStatus({ status: 'offline', service: 'pca-heuristic-service', version: 'unknown' })
+      }
+    } catch {
+      setServiceStatus({ status: 'offline', service: 'pca-heuristic-service', version: 'unknown' })
+    }
+  }, [])
+
+  // Fetch config
+  const fetchConfig = useCallback(async () => {
+    try {
+      const response = await fetch('/api/admin/pca?action=config')
+      if (response.ok) {
+        const data = await response.json()
+        setConfig(data)
+      }
+    } catch {
+      // Use defaults
+      setConfig({
+        thresholds: { score_pass: 0.7, score_challenge: 0.4 },
+        weights: { dwell_ratio: 0.30, scroll_score: 0.25, pointer_variance: 0.20, click_rate: 0.25 },
+        step_up: { methods: ['webauthn', 'pow'], primary: 'webauthn' }
+      })
+    }
+  }, [])
+
+  // Fetch sessions (mock for now)
+  const fetchSessions = useCallback(async () => {
+    // Mock data - in production would fetch from backend
+    setSessions([
+      { session_id: 'pca_abc123', score: 0.85, dwell_ratio: 0.92, scroll_depth: 65, clicks: 12, mouse_moves: 234, action: 'allow', last_update: new Date().toISOString() },
+      { session_id: 'pca_def456', score: 0.32, dwell_ratio: 0.15, scroll_depth: 5, clicks: 0, mouse_moves: 3, action: 'challenge', last_update: new Date().toISOString() },
+      { session_id: 'pca_ghi789', score: 0.71, dwell_ratio: 0.78, scroll_depth: 45, clicks: 8, mouse_moves: 156, action: 'allow', last_update: new Date().toISOString() },
+    ])
+  }, [])
+
+  useEffect(() => {
+    const init = async () => {
+      setLoading(true)
+      await Promise.all([fetchStatus(), fetchConfig(), fetchSessions()])
+      setLoading(false)
+    }
+    init()
+
+    // Refresh every 10 seconds
+    const interval = setInterval(() => {
+      fetchStatus()
+      fetchSessions()
+    }, 10000)
+
+    return () => clearInterval(interval)
+  }, [fetchStatus, fetchConfig, fetchSessions])
+
+  // Score color helper
+  const getScoreColor = (score: number) => {
+    if (score >= 0.7) return 'text-green-600 bg-green-100'
+    if (score >= 0.4) return 'text-yellow-600 bg-yellow-100'
+    return 'text-red-600 bg-red-100'
+  }
+
+  const getScoreLabel = (score: number) => {
+    if (score >= 0.7) return 'Human'
+    if (score >= 0.4) return 'Unsicher'
+    return 'Bot'
+  }
+
+  return (
+    <AdminLayout title="PCA Platform" description="Bot-Erkennung & Monetarisierung verwalten">
+      {/* Loading State */}
+      {loading && (
+        <div className="flex items-center justify-center py-12">
+          <svg className="w-8 h-8 animate-spin text-primary-600" fill="none" viewBox="0 0 24 24">
+            <circle className="opacity-25" cx="12" cy="12" r="10" stroke="currentColor" strokeWidth="4" />
+            <path className="opacity-75" fill="currentColor" d="M4 12a8 8 0 018-8V0C5.373 0 0 5.373 0 12h4z" />
+          </svg>
+          <span className="ml-3 text-slate-600">Lade PCA Status...</span>
+        </div>
+      )}
+
+      {/* Error State */}
+      {error && !loading && (
+        <div className="mb-6 bg-red-50 border border-red-200 rounded-lg p-4">
+          <div className="flex items-center gap-3">
+            <span className="text-red-500 text-xl">⚠️</span>
+            <div>
+              <h4 className="font-medium text-red-800">{error}</h4>
+              <button onClick={fetchStatus} className="mt-2 text-sm text-red-700 underline hover:no-underline">
+                Erneut versuchen
+              </button>
+            </div>
+          </div>
+        </div>
+      )}
+
+      {/* Service Status Banner */}
+      {!loading && serviceStatus && (
+        <div className={`mb-6 rounded-lg p-4 ${
+          serviceStatus.status === 'healthy' ? 'bg-green-50 border border-green-200' :
+          serviceStatus.status === 'offline' ? 'bg-red-50 border border-red-200' :
+          'bg-yellow-50 border border-yellow-200'
+        }`}>
+          <div className="flex items-center justify-between">
+            <div className="flex items-center gap-3">
+              <span className={`w-3 h-3 rounded-full ${
+                serviceStatus.status === 'healthy' ? 'bg-green-500' :
+                serviceStatus.status === 'offline' ? 'bg-red-500' : 'bg-yellow-500'
+              }`} />
+              <div>
+                <span className="font-medium">{serviceStatus.service}</span>
+                <span className="text-sm text-slate-500 ml-2">v{serviceStatus.version}</span>
+              </div>
+            </div>
+            <span className={`px-3 py-1 rounded-full text-sm font-medium ${
+              serviceStatus.status === 'healthy' ? 'bg-green-100 text-green-700' :
+              serviceStatus.status === 'offline' ? 'bg-red-100 text-red-700' : 'bg-yellow-100 text-yellow-700'
+            }`}>
+              {serviceStatus.status === 'healthy' ? 'Online' :
+               serviceStatus.status === 'offline' ? 'Offline' : 'Degraded'}
+            </span>
+          </div>
+        </div>
+      )}
+
+      {/* Tabs */}
+      {!loading && (
+        <div className="border-b border-slate-200 mb-6">
+          <nav className="flex gap-4">
+            {[
+              { id: 'overview', label: 'Übersicht', icon: '📊' },
+              { id: 'sessions', label: 'Sessions', icon: '👥' },
+              { id: 'config', label: 'Konfiguration', icon: '⚙️' },
+              { id: 'payments', label: 'Payments', icon: '💳' },
+            ].map(tab => (
+              <button
+                key={tab.id}
+                onClick={() => setActiveTab(tab.id as typeof activeTab)}
+                className={`px-4 py-3 font-medium border-b-2 transition-colors ${
+                  activeTab === tab.id
+                    ? 'border-primary-500 text-primary-600'
+                    : 'border-transparent text-slate-500 hover:text-slate-700'
+                }`}
+              >
+                <span className="mr-2">{tab.icon}</span>
+                {tab.label}
+              </button>
+            ))}
+          </nav>
+        </div>
+      )}
+
+      {/* Overview Tab */}
+      {!loading && activeTab === 'overview' && (
+        <div className="space-y-6">
+          {/* Stats Grid */}
+          <div className="grid grid-cols-2 md:grid-cols-4 gap-4">
+            <div className="bg-white rounded-lg border border-slate-200 p-4">
+              <div className="text-2xl font-bold text-slate-800">{stats.activeSessions}</div>
+              <div className="text-sm text-slate-500">Aktive Sessions</div>
+            </div>
+            <div className="bg-white rounded-lg border border-slate-200 p-4">
+              <div className="text-2xl font-bold text-green-600">{stats.humanScore}%</div>
+              <div className="text-sm text-slate-500">Human Score Avg</div>
+            </div>
+            <div className="bg-white rounded-lg border border-slate-200 p-4">
+              <div className="text-2xl font-bold text-yellow-600">{stats.challengesIssued}</div>
+              <div className="text-sm text-slate-500">Challenges ausgestellt</div>
+            </div>
+            <div className="bg-white rounded-lg border border-slate-200 p-4">
+              <div className="text-2xl font-bold text-primary-600">{stats.totalRevenue}</div>
+              <div className="text-sm text-slate-500">Umsatz (Bot-Zugriffe)</div>
+            </div>
+          </div>
+
+          {/* Quick Actions */}
+          <div className="bg-white rounded-lg border border-slate-200 p-6">
+            <h3 className="text-lg font-semibold mb-4">Quick Actions</h3>
+            <div className="flex flex-wrap gap-3">
+              <button className="px-4 py-2 bg-primary-600 text-white rounded-lg hover:bg-primary-700 transition-colors">
+                SDK herunterladen
+              </button>
+              <button className="px-4 py-2 bg-slate-100 text-slate-700 rounded-lg hover:bg-slate-200 transition-colors">
+                Demo öffnen
+              </button>
+              <button className="px-4 py-2 bg-slate-100 text-slate-700 rounded-lg hover:bg-slate-200 transition-colors">
+                Dokumentation
+              </button>
+            </div>
+          </div>
+
+          {/* Heuristic Weights Visualization */}
+          {config && (
+            <div className="bg-white rounded-lg border border-slate-200 p-6">
+              <h3 className="text-lg font-semibold mb-4">Heuristik-Gewichtung</h3>
+              <div className="space-y-3">
+                {[
+                  { key: 'dwell_ratio', label: 'Verweildauer', value: config.weights.dwell_ratio },
+                  { key: 'scroll_score', label: 'Scroll-Verhalten', value: config.weights.scroll_score },
+                  { key: 'pointer_variance', label: 'Maus-Bewegungen', value: config.weights.pointer_variance },
+                  { key: 'click_rate', label: 'Klick-Muster', value: config.weights.click_rate },
+                ].map(metric => (
+                  <div key={metric.key} className="flex items-center gap-4">
+                    <div className="w-32 text-sm text-slate-600">{metric.label}</div>
+                    <div className="flex-1 bg-slate-100 rounded-full h-4">
+                      <div
+                        className="bg-primary-500 h-4 rounded-full transition-all"
+                        style={{ width: `${metric.value * 100}%` }}
+                      />
+                    </div>
+                    <div className="w-12 text-right text-sm font-medium">{(metric.value * 100).toFixed(0)}%</div>
+                  </div>
+                ))}
+              </div>
+            </div>
+          )}
+        </div>
+      )}
+
+      {/* Sessions Tab */}
+      {!loading && activeTab === 'sessions' && (
+        <div className="bg-white rounded-lg border border-slate-200 overflow-hidden">
+          <div className="p-4 border-b border-slate-200 flex justify-between items-center">
+            <h3 className="font-semibold">Aktive Sessions</h3>
+            <button onClick={fetchSessions} className="text-sm text-primary-600 hover:underline">
+              Aktualisieren
+            </button>
+          </div>
+          <div className="overflow-x-auto">
+            <table className="w-full">
+              <thead className="bg-slate-50">
+                <tr>
+                  <th className="px-4 py-3 text-left text-xs font-medium text-slate-500 uppercase">Session ID</th>
+                  <th className="px-4 py-3 text-left text-xs font-medium text-slate-500 uppercase">Score</th>
+                  <th className="px-4 py-3 text-left text-xs font-medium text-slate-500 uppercase">Verweildauer</th>
+                  <th className="px-4 py-3 text-left text-xs font-medium text-slate-500 uppercase">Scroll</th>
+                  <th className="px-4 py-3 text-left text-xs font-medium text-slate-500 uppercase">Klicks</th>
+                  <th className="px-4 py-3 text-left text-xs font-medium text-slate-500 uppercase">Aktion</th>
+                </tr>
+              </thead>
+              <tbody className="divide-y divide-slate-200">
+                {sessions.map(session => (
+                  <tr key={session.session_id} className="hover:bg-slate-50">
+                    <td className="px-4 py-3 font-mono text-sm">{session.session_id}</td>
+                    <td className="px-4 py-3">
+                      <span className={`px-2 py-1 rounded-full text-xs font-medium ${getScoreColor(session.score)}`}>
+                        {session.score.toFixed(2)} - {getScoreLabel(session.score)}
+                      </span>
+                    </td>
+                    <td className="px-4 py-3 text-sm">{(session.dwell_ratio * 100).toFixed(0)}%</td>
+                    <td className="px-4 py-3 text-sm">{session.scroll_depth}%</td>
+                    <td className="px-4 py-3 text-sm">{session.clicks}</td>
+                    <td className="px-4 py-3">
+                      <span className={`px-2 py-1 rounded text-xs font-medium ${
+                        session.action === 'allow' ? 'bg-green-100 text-green-700' : 'bg-yellow-100 text-yellow-700'
+                      }`}>
+                        {session.action === 'allow' ? 'Erlaubt' : 'Challenge'}
+                      </span>
+                    </td>
+                  </tr>
+                ))}
+              </tbody>
+            </table>
+          </div>
+        </div>
+      )}
+
+      {/* Config Tab */}
+      {!loading && activeTab === 'config' && config && (
+        <div className="space-y-6">
+          {/* Thresholds */}
+          <div className="bg-white rounded-lg border border-slate-200 p-6">
+            <h3 className="text-lg font-semibold mb-4">Score-Schwellenwerte</h3>
+            <div className="grid grid-cols-2 gap-6">
+              <div>
+                <label className="block text-sm font-medium text-slate-700 mb-2">
+                  Pass Score (Human erkannt)
+                </label>
+                <input
+                  type="number"
+                  value={config.thresholds.score_pass}
+                  step="0.1"
+                  min="0"
+                  max="1"
+                  className="w-full px-3 py-2 border border-slate-300 rounded-lg"
+                  readOnly
+                />
+                <p className="mt-1 text-xs text-slate-500">Score ab dem ein Besucher als Mensch gilt</p>
+              </div>
+              <div>
+                <label className="block text-sm font-medium text-slate-700 mb-2">
+                  Challenge Score
+                </label>
+                <input
+                  type="number"
+                  value={config.thresholds.score_challenge}
+                  step="0.1"
+                  min="0"
+                  max="1"
+                  className="w-full px-3 py-2 border border-slate-300 rounded-lg"
+                  readOnly
+                />
+                <p className="mt-1 text-xs text-slate-500">Score unter dem Step-Up erforderlich ist</p>
+              </div>
+            </div>
+          </div>
+
+          {/* Step-Up Methods */}
+          <div className="bg-white rounded-lg border border-slate-200 p-6">
+            <h3 className="text-lg font-semibold mb-4">Step-Up Methoden</h3>
+            <div className="space-y-3">
+              {config.step_up.methods.map(method => (
+                <div key={method} className="flex items-center justify-between p-3 bg-slate-50 rounded-lg">
+                  <div className="flex items-center gap-3">
+                    <span className="text-xl">{method === 'webauthn' ? '🔐' : '⚡'}</span>
+                    <div>
+                      <div className="font-medium">{method === 'webauthn' ? 'WebAuthn' : 'Proof-of-Work'}</div>
+                      <div className="text-sm text-slate-500">
+                        {method === 'webauthn' ? 'Biometrische Authentifizierung' : 'Rechenintensive Challenge'}
+                      </div>
+                    </div>
+                  </div>
+                  {method === config.step_up.primary && (
+                    <span className="px-2 py-1 bg-primary-100 text-primary-700 rounded text-xs font-medium">
+                      Primär
+                    </span>
+                  )}
+                </div>
+              ))}
+            </div>
+          </div>
+
+          {/* ai-access.json Preview */}
+          <div className="bg-white rounded-lg border border-slate-200 p-6">
+            <h3 className="text-lg font-semibold mb-4">ai-access.json</h3>
+            <pre className="bg-slate-900 text-slate-100 p-4 rounded-lg overflow-x-auto text-sm">
+{`{
+  "thresholds": {
+    "score_pass": ${config.thresholds.score_pass},
+    "score_challenge": ${config.thresholds.score_challenge}
+  },
+  "weights": {
+    "dwell_ratio": ${config.weights.dwell_ratio},
+    "scroll_score": ${config.weights.scroll_score},
+    "pointer_variance": ${config.weights.pointer_variance},
+    "click_rate": ${config.weights.click_rate}
+  },
+  "step_up": {
+    "methods": ${JSON.stringify(config.step_up.methods)},
+    "primary": "${config.step_up.primary}"
+  },
+  "pca_roles": {
+    "Person": { "access": "allow", "price": null },
+    "Corporate": { "access": "allow", "price": null },
+    "Agent": { "access": "charge", "price": "0.001 EUR" }
+  }
+}`}
+            </pre>
+          </div>
+        </div>
+      )}
+
+      {/* Payments Tab */}
+      {!loading && activeTab === 'payments' && (
+        <div className="space-y-6">
+          <div className="bg-yellow-50 border border-yellow-200 rounded-lg p-4">
+            <div className="flex items-center gap-3">
+              <span className="text-yellow-500 text-xl">🚧</span>
+              <div>
+                <h4 className="font-medium text-yellow-800">Payment Gateway in Entwicklung</h4>
+                <p className="text-sm text-yellow-700 mt-1">
+                  HTTP 402 Payment Required und Stablecoin-Integration werden in einer zukünftigen Version verfügbar sein.
+                </p>
+              </div>
+            </div>
+          </div>
+
+          <div className="bg-white rounded-lg border border-slate-200 p-6">
+            <h3 className="text-lg font-semibold mb-4">Geplante Features</h3>
+            <ul className="space-y-3">
+              <li className="flex items-center gap-3">
+                <span className="w-6 h-6 rounded-full bg-slate-200 flex items-center justify-center text-xs">1</span>
+                <span>Micropayments per Request (Pay-per-Crawl)</span>
+              </li>
+              <li className="flex items-center gap-3">
+                <span className="w-6 h-6 rounded-full bg-slate-200 flex items-center justify-center text-xs">2</span>
+                <span>Stablecoin Support (USDC, EURC)</span>
+              </li>
+              <li className="flex items-center gap-3">
+                <span className="w-6 h-6 rounded-full bg-slate-200 flex items-center justify-center text-xs">3</span>
+                <span>Bitcoin Lightning Integration</span>
+              </li>
+              <li className="flex items-center gap-3">
+                <span className="w-6 h-6 rounded-full bg-slate-200 flex items-center justify-center text-xs">4</span>
+                <span>Agent Wallet Verwaltung</span>
+              </li>
+            </ul>
+          </div>
+        </div>
+      )}
+    </AdminLayout>
+  )
+}