feat: Normen-Referenzen in Hazards + Massnahmen + Normenrecherche-Tab

- Hazard Log: Top 2 relevante Normen pro Kategorie unter dem Kategorie-Badge
- Massnahmen: Normen-Referenzen aus measures_library inline anzeigen
- Navigation: Neuer Normenrecherche-Tab (zwischen Grenzen und Komponenten)
- Normenrecherche-Seite: SuggestedNorms + A/B/C Erklaerung

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

admin-compliance/app/sdk/iace/[projectId]/hazards/_components/RiskAssessmentTable.tsx

@@ -80,6 +80,25 @@ export function RiskAssessmentTable({ projectId, hazards, onReassess, decisions,
   const [mitCounts, setMitCounts] = useState<Record<string, number>>({})
   const [edits, setEdits] = useState<Record<string, EditState>>({})
   const [saving, setSaving] = useState<string | null>(null)
+  const [normsByCategory, setNormsByCategory] = useState<Record<string, string[]>>({})
+
+  // Fetch norms library and build category→norm-numbers map
+  useEffect(() => {
+    fetch(`/api/sdk/v1/iace/norms-library`)
+      .then(r => r.ok ? r.json() : null)
+      .then(json => {
+        if (!json?.norms) return
+        const map: Record<string, string[]> = {}
+        for (const n of json.norms) {
+          for (const cat of (n.hazard_cats || [])) {
+            if (!map[cat]) map[cat] = []
+            if (map[cat].length < 3) map[cat].push(n.number)
+          }
+        }
+        setNormsByCategory(map)
+      })
+      .catch(() => {})
+  }, [])
 
   // Fetch mitigation counts per hazard
   useEffect(() => {
@@ -226,6 +245,11 @@ export function RiskAssessmentTable({ projectId, hazards, onReassess, decisions,
                     <span className="inline-block px-1.5 py-0.5 rounded bg-gray-100 dark:bg-gray-700 text-gray-700 dark:text-gray-300 text-[10px] font-medium">
                       {CATEGORY_LABELS[h.category] || h.category}
                     </span>
+                    {normsByCategory[h.category]?.length > 0 && (
+                      <div className="text-[9px] text-blue-500 mt-0.5 truncate" title={normsByCategory[h.category].join(', ')}>
+                        {normsByCategory[h.category].slice(0, 2).join(', ')}
+                      </div>
+                    )}
                   </td>
                   {/* Initial S/E/P/RPZ/Risk */}
                   <td className="px-2 py-2 text-center text-gray-700 dark:text-gray-300">{initS}</td>