feat(iace-ui): component presence/CE review + machine-type dropdown

- Components view: three presence sections (Vorhanden / Nicht vorhanden /
  Geloescht) with bidirectional move + soft-delete (audit-visible, restorable),
  so the expert corrects the engine's best-effort negation in both directions.
- CE marking per component (bought robot/actuator/SPS) with a clear
  "validate the integrated safety function (PL/SIL)" note when also safety-relevant.
  Safe semantics: hazards are not suppressed, only provenance is surfaced.
- Project-create form: machine type is now a grouped dropdown from the engine's
  controlled vocabulary (GET /machine-types) instead of free text.
- Knowledge graph: component→hazard edges use the real component_id.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

admin-compliance/app/sdk/iace/page.tsx

@@ -134,9 +134,14 @@ export default function IACEDashboardPage() {
     machine_type: '',
     manufacturer: '',
   })
+  const [machineTypes, setMachineTypes] = useState<{ key: string; label_de: string; group: string }[]>([])
 
   useEffect(() => {
     fetchProjects()
+    fetch('/api/sdk/v1/iace/machine-types')
+      .then((r) => (r.ok ? r.json() : null))
+      .then((j) => j && setMachineTypes(j.machine_types || []))
+      .catch((err) => console.error('Failed to fetch machine types:', err))
   }, [])
 
   async function fetchProjects() {
@@ -308,13 +313,23 @@ export default function IACEDashboardPage() {
               <label className="block text-sm font-medium text-gray-700 dark:text-gray-300 mb-1">
                 Maschinentyp
               </label>
-              <input
-                type="text"
+              <select
                 value={formData.machine_type}
                 onChange={(e) => setFormData({ ...formData, machine_type: e.target.value })}
-                placeholder="z.B. Industrieroboter"
                 className="w-full px-4 py-2 border border-gray-300 rounded-lg focus:ring-2 focus:ring-purple-500 focus:border-transparent dark:bg-gray-700 dark:border-gray-600 dark:text-white"
-              />
+              >
+                <option value="">— Maschinentyp wählen —</option>
+                {Array.from(new Set(machineTypes.map((m) => m.group))).map((group) => (
+                  <optgroup key={group} label={group}>
+                    {machineTypes.filter((m) => m.group === group).map((m) => (
+                      <option key={m.key} value={m.key}>{m.label_de}</option>
+                    ))}
+                  </optgroup>
+                ))}
+              </select>
+              <p className="mt-1 text-xs text-gray-400">
+                Steuert, welche maschinenspezifischen Gefährdungs-Patterns greifen — bitte aus der Liste wählen.
+              </p>
             </div>
             <div>
               <label className="block text-sm font-medium text-gray-700 dark:text-gray-300 mb-1">