fix: WorkflowEditor crash (setWorkflowId undefined) + status via PATCH endpoint

- Remove non-existent setWorkflowId call that caused white screen
- Use separate PATCH /status endpoint for publish/review (not in PUT payload)
- Redirect to workflow view after publishing

frontend/src/pages/WorkflowEditor.tsx

@@ -70,7 +70,6 @@ export default function WorkflowEditor() {
 
   useEffect(() => {
     if (!id) return;
-    setWorkflowId(id);
     setLoading(true);
     workflowsApi
       .get(id)
@@ -105,13 +104,12 @@ export default function WorkflowEditor() {
       .map((t) => t.trim())
       .filter(Boolean);
 
-  const buildMetadataPayload = (status?: Workflow['status']) => ({
+  const buildMetadataPayload = () => ({
     title,
     description: description || undefined,
     categoryId: categoryId || undefined,
     tags: parseTags(),
     isTemplate,
-    ...(status ? { status } : {}),
   });
 
   const syncSteps = async (wfId: string) => {
@@ -161,7 +159,7 @@ export default function WorkflowEditor() {
       setSaving(true);
       try {
         if (isNew) {
-          // Build create payload with tenantId, status, and inline steps
+          // Build create payload with tenantId and inline steps
           const effectiveTenantId = tenantId || user?.tenantId;
           if (!effectiveTenantId) {
             toast.error('Bitte wählen Sie einen Mandanten');
@@ -175,7 +173,6 @@ export default function WorkflowEditor() {
             categoryId: categoryId || undefined,
             tags: parseTags(),
             isTemplate,
-            status: status || 'DRAFT',
             steps: steps.map((s, idx) => ({
               title: s.title || 'Unbenannter Schritt',
               content: s.content || ' ',
@@ -185,15 +182,26 @@ export default function WorkflowEditor() {
             })),
           };
           const created = await workflowsApi.create(createPayload as Partial<Workflow>);
+          // Change status if not DRAFT (status must be set via separate endpoint)
+          if (status && status !== 'DRAFT') {
+            await workflowsApi.changeStatus(created.id, status);
+          }
           toast.success('Workflow erstellt');
-          navigate(`/workflows/${created.id}/edit`, { replace: true });
+          navigate(`/workflows/${created.id}`, { replace: true });
         } else {
           // Update metadata first
-          const payload = buildMetadataPayload(status);
+          const payload = buildMetadataPayload();
           await workflowsApi.update(id!, payload as Partial<Workflow>);
           // Sync steps via individual step endpoints
           await syncSteps(id!);
+          // Change status if requested (via separate endpoint)
+          if (status) {
+            await workflowsApi.changeStatus(id!, status);
+          }
           toast.success('Workflow gespeichert');
+          if (status === 'PUBLISHED') {
+            navigate(`/workflows/${id}`, { replace: true });
+          }
         }
       } catch {
         toast.error('Speichern fehlgeschlagen');
@@ -211,7 +219,8 @@ export default function WorkflowEditor() {
     autoSaveTimer.current = setTimeout(async () => {
       if (!title.trim()) return;
       try {
-        await workflowsApi.update(id!, buildMetadataPayload() as Partial<Workflow>);
+        const payload = buildMetadataPayload();
+        await workflowsApi.update(id!, payload as Partial<Workflow>);
         setAutoSaved(true);
         setTimeout(() => setAutoSaved(false), 2000);
       } catch {