fix(machines): fix skeleton creation — load all items + atomic creation

- Load composants/pieces/products with itemsPerPage: 200 instead of 30
  (root cause: only first 30 items were available in creation dropdowns)
- Rollback machine if skeleton PATCH fails (delete orphaned machine)
- Initialize custom fields after successful machine creation

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app/composables/useMachineCreatePage.ts

@@ -34,7 +34,7 @@ export function useMachineCreatePage() {
   // Composable calls
   // ---------------------------------------------------------------------------
 
-  const { createMachine, createMachineFromType, reconfigureSkeleton } = useMachines()
+  const { createMachine, createMachineFromType, reconfigureSkeleton, addMissingCustomFields, deleteMachine } = useMachines()
   const { sites, loadSites } = useSites()
   const { machineTypes, loadMachineTypes, loading: machineTypesLoading } = useMachineTypesApi()
   const { composants, loadComposants, loading: composantsLoading } = useComposants()
@@ -340,17 +340,24 @@ export function useMachineCreatePage() {
         : await createMachineFromType(baseMachineData as any, type)
 
       if (result.success) {
-        if (hasRequirements && result.data?.id) {
-          const skeletonResult: any = await reconfigureSkeleton(result.data.id, {
+        const machineId = result.data?.id
+        if (hasRequirements && machineId) {
+          const skeletonResult: any = await reconfigureSkeleton(machineId, {
             componentLinks,
             pieceLinks,
             productLinks,
           } as any)
           if (!skeletonResult.success) {
-            toast.showError(skeletonResult.error || 'Impossible d\'enregistrer les pièces/composants')
+            // Rollback: delete the orphaned machine
+            await deleteMachine(machineId).catch(() => {})
+            toast.showError(skeletonResult.error || 'Impossible d\'enregistrer les pièces/composants. La machine n\'a pas été créée.')
             return
           }
         }
+        // Initialize custom fields for the machine type
+        if (machineId) {
+          await addMissingCustomFields(machineId, { showToast: false }).catch(() => {})
+        }
         newMachine.name = ''
         newMachine.siteId = ''
         newMachine.typeMachineId = ''
@@ -386,9 +393,9 @@ export function useMachineCreatePage() {
     await Promise.all([
       loadSites(),
       loadMachineTypes(),
-      loadComposants(),
-      loadPieces(),
-      loadProducts(),
+      loadComposants({ itemsPerPage: 200, force: true }),
+      loadPieces({ itemsPerPage: 200, force: true }),
+      loadProducts({ itemsPerPage: 200, force: true }),
     ])
   })