feat(iace): benchmark system + erklaerteil + dedup-fix

- Erklaerteil-Template fuer Risikobeurteilungen (risk_assessment_template.go)
  in PDF-Export, Markdown-Export und Frontend ReportPrintView eingebaut
- Ground Truth Benchmark-System: Datenmodell, Fuzzy-Matching-Engine,
  3 API Endpoints (import-gt, benchmark, benchmark/summary)
- Frontend Benchmark-Tab mit Score-Cards, Kategorie-Breakdown,
  Hazard-Vergleichstabelle (Zugeordnet/Fehlend/Extra), Business Impact
- Erster Benchmark: 13.3% Coverage (Baseline) gegen 60 GT-Eintraege
- Dedup-Fix: seenCat[cat] -> seenCatZone[cat+zone] erlaubt mehrere
  Gefaehrdungen pro Kategorie an verschiedenen Gefahrenstellen
- Komponenten-spezifische Hazard-Namen und Zone-basierte Zuordnung

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

admin-compliance/app/sdk/iace/[projectId]/benchmark/page.tsx

@@ -0,0 +1,160 @@
+'use client'
+
+import React, { useState } from 'react'
+import { useParams } from 'next/navigation'
+import { useBenchmark } from './_hooks/useBenchmark'
+import { GTImportForm } from './_components/GTImportForm'
+import { HazardComparisonTable } from './_components/HazardComparisonTable'
+import { CategoryBreakdown } from './_components/CategoryBreakdown'
+
+export default function BenchmarkPage() {
+  const { projectId } = useParams<{ projectId: string }>()
+  const { result, gtLoaded, gtEntryCount, loading, error, importGT, runBenchmark } = useBenchmark(projectId)
+  const [gtProjectId, setGtProjectId] = useState('')
+
+  const coveragePct = result ? Math.round(result.coverage_score * 100) : 0
+  const measurePct = result ? Math.round(result.measure_coverage * 100) : 0
+
+  return (
+    <div className="space-y-6 max-w-[1200px]">
+      {/* Header */}
+      <div>
+        <h1 className="text-lg font-bold text-gray-900 dark:text-white">Ground Truth Benchmark</h1>
+        <p className="text-sm text-gray-500 mt-1">
+          Vergleich der Engine-Ergebnisse mit einer professionellen Risikobeurteilung
+        </p>
+      </div>
+
+      {error && (
+        <div className="px-4 py-3 bg-red-50 dark:bg-red-900/20 border border-red-200 dark:border-red-800 rounded-lg text-sm text-red-600">
+          {error}
+        </div>
+      )}
+
+      {/* GT Import or Cross-Project Reference */}
+      <div className="grid grid-cols-1 lg:grid-cols-2 gap-4">
+        <GTImportForm onImport={importGT} loading={loading} />
+
+        <div className="bg-white dark:bg-gray-800 rounded-lg border border-gray-200 dark:border-gray-700 p-4">
+          <h3 className="text-sm font-semibold text-gray-700 dark:text-gray-300 mb-2">Benchmark ausfuehren</h3>
+          <p className="text-xs text-gray-500 mb-3">
+            GT aus diesem Projekt verwenden, oder eine Projekt-ID mit importierter GT angeben.
+          </p>
+
+          <div className="space-y-2">
+            <input
+              type="text"
+              value={gtProjectId}
+              onChange={(e) => setGtProjectId(e.target.value)}
+              placeholder="GT-Projekt-ID (optional — leer = dieses Projekt)"
+              className="w-full text-xs border border-gray-300 dark:border-gray-600 rounded-md px-3 py-2 bg-gray-50 dark:bg-gray-900"
+            />
+            <button
+              onClick={() => runBenchmark(gtProjectId || undefined)}
+              disabled={loading}
+              className="w-full px-4 py-2 text-sm font-medium bg-purple-600 hover:bg-purple-700 disabled:bg-gray-300 text-white rounded-md transition-colors"
+            >
+              {loading ? 'Vergleiche...' : 'Benchmark starten'}
+            </button>
+          </div>
+
+          {gtLoaded && !result && (
+            <div className="mt-3 px-3 py-2 bg-blue-50 dark:bg-blue-900/20 rounded text-xs text-blue-600">
+              {gtEntryCount} GT-Eintraege geladen. Klicke &quot;Benchmark starten&quot;.
+            </div>
+          )}
+        </div>
+      </div>
+
+      {/* Results */}
+      {result && (
+        <>
+          {/* Score Cards */}
+          <div className="grid grid-cols-2 md:grid-cols-4 gap-4">
+            <ScoreCard
+              label="Hazard Coverage"
+              value={`${coveragePct}%`}
+              sub={`${result.matched_pairs?.length || 0} / ${result.total_gt} erkannt`}
+              color={coveragePct >= 80 ? 'green' : coveragePct >= 50 ? 'yellow' : 'red'}
+            />
+            <ScoreCard
+              label="Massnahmen-Coverage"
+              value={`${measurePct}%`}
+              sub="der zugeordneten Gefaehrdungen"
+              color={measurePct >= 80 ? 'green' : measurePct >= 50 ? 'yellow' : 'red'}
+            />
+            <ScoreCard
+              label="GT Eintraege"
+              value={String(result.total_gt)}
+              sub="professionelle Beurteilung"
+              color="gray"
+            />
+            <ScoreCard
+              label="Engine Eintraege"
+              value={String(result.total_engine)}
+              sub={`${result.extra_in_engine?.length || 0} zusaetzlich`}
+              color="gray"
+            />
+          </div>
+
+          {/* Category Breakdown */}
+          <CategoryBreakdown breakdown={result.category_breakdown || []} />
+
+          {/* Hazard Comparison Table */}
+          <HazardComparisonTable
+            matched={result.matched_pairs || []}
+            missing={result.missing_from_engine || []}
+            extra={result.extra_in_engine || []}
+          />
+
+          {/* Business Impact */}
+          <div className="bg-white dark:bg-gray-800 rounded-lg border border-gray-200 dark:border-gray-700 p-4">
+            <h3 className="text-sm font-semibold text-gray-700 dark:text-gray-300 mb-2">Business Impact</h3>
+            <div className="grid grid-cols-3 gap-4 text-center">
+              <div>
+                <div className="text-2xl font-bold text-gray-900 dark:text-white">2,5 Tage</div>
+                <div className="text-xs text-gray-500">Manueller Aufwand</div>
+              </div>
+              <div>
+                <div className="text-2xl font-bold text-purple-600">
+                  {(coveragePct / 100 * 2.5).toFixed(1)} Tage
+                </div>
+                <div className="text-xs text-gray-500">Eingespart bei {coveragePct}% Coverage</div>
+              </div>
+              <div>
+                <div className="text-2xl font-bold text-green-600">
+                  {Math.round(coveragePct / 100 * 2.5 * 8 * 100)} EUR
+                </div>
+                <div className="text-xs text-gray-500">Einsparung (100 EUR/h)</div>
+              </div>
+            </div>
+          </div>
+        </>
+      )}
+    </div>
+  )
+}
+
+function ScoreCard({ label, value, sub, color }: {
+  label: string; value: string; sub: string
+  color: 'green' | 'yellow' | 'red' | 'gray'
+}) {
+  const colors = {
+    green: 'border-green-200 dark:border-green-800',
+    yellow: 'border-yellow-200 dark:border-yellow-800',
+    red: 'border-red-200 dark:border-red-800',
+    gray: 'border-gray-200 dark:border-gray-700',
+  }
+  const textColors = {
+    green: 'text-green-600', yellow: 'text-yellow-600',
+    red: 'text-red-600', gray: 'text-gray-900 dark:text-white',
+  }
+
+  return (
+    <div className={`bg-white dark:bg-gray-800 rounded-lg border-2 ${colors[color]} p-4 text-center`}>
+      <div className={`text-2xl font-bold ${textColors[color]}`}>{value}</div>
+      <div className="text-xs font-medium text-gray-700 dark:text-gray-300 mt-1">{label}</div>
+      <div className="text-[10px] text-gray-400 mt-0.5">{sub}</div>
+    </div>
+  )
+}