feat(machine) : single save button + link versioning display

- Replace auto-save-on-blur with single "Enregistrer" button
- Add Cancel button that resets local state
- Expose saveFieldDefinitions via defineExpose on MachineInfoCard
- Remove standalone save button from MachineCustomFieldDefEditor
- Add saveAllMachineCustomFields batch method
- Add submitEdition/cancelEdition/saving/canSubmit to orchestrator
- Show diff summary badges in version list entries
- Show link changes in restore modal description

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

app/composables/useMachineDetailData.ts

@@ -62,6 +62,7 @@ export function useMachineDetailData(machineId: string) {
   const machine = ref<AnyRecord | null>(null)
   const productDocumentsMap = ref<Map<string, AnyRecord[]>>(new Map())
   const printAreaRef = ref<HTMLElement | null>(null)
+  const saving = ref(false)
 
   // Machine fields
   const machineName = ref('')
@@ -108,6 +109,12 @@ export function useMachineDetailData(machineId: string) {
 
   // UI state
   const isEditMode = ref(false)
+  const canSubmit = computed(() => {
+    if (!machine.value) return false
+    if (saving.value) return false
+    if (!machineName.value.trim()) return false
+    return true
+  })
   const debug = ref(false)
 
   const componentsCollapsed = ref(true)
@@ -146,6 +153,7 @@ export function useMachineDetailData(machineId: string) {
     setMachineCustomFieldValue,
     updateMachineCustomField,
     updatePieceCustomField,
+    saveAllMachineCustomFields,
   } = useMachineDetailCustomFields({
     machine,
     isEditMode,
@@ -302,6 +310,37 @@ export function useMachineDetailData(machineId: string) {
     pieceCollapseToggleToken.value += 1
   }
 
+  const submitEdition = async () => {
+    if (!machine.value || saving.value) return
+    saving.value = true
+
+    try {
+      // 1. Save machine info (name, reference, site, constructeurs)
+      await updateMachineInfo()
+
+      // 2. Save all custom field values
+      await saveAllMachineCustomFields()
+
+      // 3. Reload machine data to get fresh state
+      await loadMachineData()
+
+      // 4. Exit edit mode
+      isEditMode.value = false
+      toast.showSuccess('Machine mise à jour avec succès')
+    } catch (error) {
+      console.error('Erreur lors de la sauvegarde:', error)
+      toast.showError('Erreur lors de la sauvegarde de la machine')
+    } finally {
+      saving.value = false
+    }
+  }
+
+  const cancelEdition = () => {
+    initMachineFields()
+    syncMachineCustomFields()
+    isEditMode.value = false
+  }
+
   // Print wrappers
   const ensurePrintSelectionEntries = () =>
     _ensurePrintEntries(components.value, machinePieces.value)
@@ -451,6 +490,7 @@ export function useMachineDetailData(machineId: string) {
     updateMachineInfo, updateComponent, updatePieceFromComponent,
     updatePieceInfo, handleMachineConstructeurChange, editComponent, editPiece,
     toggleEditMode, toggleAllComponents, collapseAllComponents, toggleAllPieces,
+    saving, canSubmit, submitEdition, cancelEdition,
 
     // Print
     printModalOpen, printSelection, ensurePrintSelectionEntries,