feat(versioning) : add entity versioning frontend with restore flow

- useEntityVersions composable (list, preview, restore API calls)
- EntityVersionList component with auto-refresh after save
- VersionRestoreModal with context-aware messages per entity type
- Integrate into machine, composant, piece, product detail pages
- Add restore action label to historyDisplayUtils
- Show structure slots in composant/piece consultation mode

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

app/pages/component/[id]/edit.vue

@@ -316,11 +316,19 @@
           :field-labels="historyFieldLabels"
         />
 
+        <EntityVersionList
+          entity-type="composant"
+          :entity-id="String(route.params.id)"
+          :field-labels="historyFieldLabels"
+          :refresh-key="versionRefreshKey"
+          @restored="fetchComponent()"
+        />
+
         <div class="flex flex-col gap-3 md:flex-row md:justify-end">
           <NuxtLink to="/component-catalog" class="btn btn-ghost" :class="{ 'btn-disabled': saving }">
             Annuler
           </NuxtLink>
-          <button type="button" class="btn btn-primary" :disabled="!canSubmit" @click="submitEdition">
+          <button type="button" class="btn btn-primary" :disabled="!canSubmit" @click="async () => { await submitEdition(); versionRefreshKey++ }">
             <span v-if="saving" class="loading loading-spinner loading-sm mr-2" />
             Enregistrer les modifications
           </button>
@@ -349,6 +357,7 @@ import { useDocuments } from '~/composables/useDocuments'
 
 const route = useRoute()
 const { updateDocument } = useDocuments()
+const versionRefreshKey = ref(0)
 
 const {
   component,
@@ -389,6 +398,7 @@ const {
   resolveProductLabel,
   resolveSubcomponentLabel,
   formatStructurePreview,
+  fetchComponent,
 } = useComponentEdit(String(route.params.id))
 
 const editingDocument = ref<any | null>(null)