feat(iace): add withdrawn filter to norms library frontend

- Add withdrawn/valid_until/replaced_by to Norm interface
- Add Status filter (Aktiv/Zurueckgezogen) — defaults to "Aktiv"
- Withdrawn norms hidden by default, viewable via filter

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

admin-compliance/app/sdk/iace/library/_components/NormenTab.tsx

@@ -15,6 +15,9 @@ export interface Norm {
   mandatory: boolean
   relevant_sections: string[]
   beuth_url: string
+  withdrawn?: boolean
+  valid_until?: string
+  replaced_by?: string
 }
 
 const PER_PAGE = 50
@@ -30,6 +33,11 @@ const MANDATORY_OPTIONS = [
   { value: 'ja', label: 'Pflicht: Ja' },
   { value: 'nein', label: 'Pflicht: Nein' },
 ]
+const STATUS_OPTIONS = [
+  { value: '', label: 'Status: Alle' },
+  { value: 'active', label: 'Aktiv' },
+  { value: 'withdrawn', label: 'Zurueckgezogen' },
+]
 
 interface Props { norms: Norm[] }
 
@@ -38,6 +46,7 @@ export default function NormenTab({ norms }: Props) {
   const [debounced, setDebounced] = useState('')
   const [typeFilter, setTypeFilter] = useState('')
   const [mandatoryFilter, setMandatoryFilter] = useState('')
+  const [statusFilter, setStatusFilter] = useState('active')
   const [page, setPage] = useState(1)
   const timer = useRef<ReturnType<typeof setTimeout> | null>(null)
 
@@ -46,7 +55,7 @@ export default function NormenTab({ norms }: Props) {
     return () => { if (timer.current) clearTimeout(timer.current) }
   }, [search])
 
-  useEffect(() => { setPage(1) }, [debounced, typeFilter, mandatoryFilter])
+  useEffect(() => { setPage(1) }, [debounced, typeFilter, mandatoryFilter, statusFilter])
 
   const filtered = useMemo(() => {
     const q = debounced.toLowerCase()
@@ -55,9 +64,11 @@ export default function NormenTab({ norms }: Props) {
       if (typeFilter && n.norm_type !== typeFilter) return false
       if (mandatoryFilter === 'ja' && !n.mandatory) return false
       if (mandatoryFilter === 'nein' && n.mandatory) return false
+      if (statusFilter === 'active' && n.withdrawn) return false
+      if (statusFilter === 'withdrawn' && !n.withdrawn) return false
       return true
     })
-  }, [norms, debounced, typeFilter, mandatoryFilter])
+  }, [norms, debounced, typeFilter, mandatoryFilter, statusFilter])
 
   const totalPages = Math.ceil(filtered.length / PER_PAGE)
   const pageItems = filtered.slice((page - 1) * PER_PAGE, page * PER_PAGE)
@@ -70,6 +81,7 @@ export default function NormenTab({ norms }: Props) {
         </div>
         <FilterDropdown label="Normtyp" value={typeFilter} options={TYPE_OPTIONS} onChange={setTypeFilter} />
         <FilterDropdown label="Pflicht" value={mandatoryFilter} options={MANDATORY_OPTIONS} onChange={setMandatoryFilter} />
+        <FilterDropdown label="Status" value={statusFilter} options={STATUS_OPTIONS} onChange={setStatusFilter} />
         <span className="text-sm text-gray-500 dark:text-gray-400 ml-auto">
           {norms.length} Normen{filtered.length !== norms.length && ` (${filtered.length} gefiltert)`}
         </span>