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/components/common/EntityVersionList.vue

@@ -53,6 +53,15 @@
             <span>{{ formatDate(entry.createdAt) }}</span>
             <span v-if="entry.actor">&middot; {{ entry.actor.label }}</span>
           </div>
+          <div v-if="entry.diff && Object.keys(entry.diff).length" class="mt-1 flex flex-wrap gap-1">
+            <span
+              v-for="(change, field) in entry.diff"
+              :key="field"
+              class="badge badge-ghost badge-xs"
+            >
+              {{ formatDiffEntry(String(field), change) }}
+            </span>
+          </div>
         </div>
         <button
           v-if="canRestore && entry.version !== currentVersion"
@@ -117,6 +126,16 @@ const targetVersion = ref<number | null>(null)
 const actionLabel = (action: string) => historyActionLabel(action)
 const formatDate = (date: string) => formatHistoryDate(date)
 
+const formatDiffEntry = (field: string, change: { from: unknown; to: unknown }): string => {
+  const label = props.fieldLabels[field] || field
+  // Link changes (addedComponent, removedPiece, etc.) have {id, name} as value
+  const val = change.to ?? change.from
+  if (val && typeof val === 'object' && 'name' in (val as Record<string, unknown>)) {
+    return `${label}: ${(val as Record<string, unknown>).name}`
+  }
+  return label
+}
+
 const handleRestore = async (version: number) => {
   targetVersion.value = version
   previewData.value = null

app/components/common/VersionRestoreModal.vue

@@ -26,6 +26,7 @@
                     <li>Nom, reference, prix</li>
                     <li>Site</li>
                     <li>Fournisseurs</li>
+                    <li>Composants, pieces et produits lies</li>
                     <li>Champs personnalises</li>
                   </ul>
                 </template>