perf(edit-pages) : reduce blocking API calls on edit pages

- Remove redundant getCustomFieldValuesByEntity() calls (use entity response)
- Remove redundant refreshDocuments() from onMounted (docs already in entity)
- Make loadHistory() non-blocking (fire-and-forget)
- Defer bulk catalog loads on component edit (pieces/products/composants)
- Use pieceTypes cache instead of separate getModelType() call on piece edit
- Try embedded typeProduct from entity response on product edit

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

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

@@ -428,7 +428,7 @@ const route = useRoute()
 const router = useRouter()
 const toast = useToast()
 const { getProduct, updateProduct } = useProducts()
-const { upsertCustomFieldValue, updateCustomFieldValue, getCustomFieldValuesByEntity } = useCustomFields()
+const { upsertCustomFieldValue, updateCustomFieldValue } = useCustomFields()
 const {
   loadDocumentsByProduct,
   uploadDocuments: uploadProductDocuments,
@@ -520,15 +520,17 @@ const loadProduct = async () => {
   if (result.success && result.data) {
     product.value = result.data
     productDocuments.value = Array.isArray(result.data.documents) ? result.data.documents : []
+
     await loadProductType()
-    const customValues = await getCustomFieldValuesByEntity('product', result.data.id)
-    if (customValues.success && Array.isArray(customValues.data)) {
-      product.value.customFieldValues = customValues.data
-      refreshCustomFieldInputs(undefined, customValues.data)
-    }
-    await hydrateForm()
-    await refreshDocuments()
-    await loadHistory(result.data.id)
+
+    // Use customFieldValues from entity response (enriched with customField definitions via serialization groups)
+    const customValues = Array.isArray(result.data?.customFieldValues) ? result.data.customFieldValues : []
+    refreshCustomFieldInputs(undefined, customValues)
+
+    hydrateForm()
+
+    // History is non-blocking — template handles its own loading state
+    loadHistory(result.data.id).catch(() => {})
   } else {
     product.value = null
   }
@@ -587,9 +589,20 @@ const handleFilesAdded = async (files: File[]) => {
 }
 
 const loadProductType = async () => {
+  // Try using the expanded typeProduct from entity response first
+  const embedded = product.value?.typeProduct
+  if (embedded && typeof embedded === 'object' && embedded.id) {
+    const embeddedStructure = embedded.structure ?? embedded.productSkeleton ?? null
+    if (embeddedStructure) {
+      productType.value = embedded
+      structure.value = normalizeProductStructureForSave(embeddedStructure)
+      return
+    }
+  }
+
   if (!product.value?.typeProductId) {
-    productType.value = product.value?.typeProduct ?? null
-    structure.value = normalizeProductStructureForSave(productType.value?.structure ?? null)
+    productType.value = embedded ?? null
+    structure.value = normalizeProductStructureForSave(embedded?.structure ?? null)
     return
   }
   try {
@@ -598,12 +611,12 @@ const loadProductType = async () => {
     structure.value = normalizeProductStructureForSave(type?.structure ?? type?.productSkeleton ?? null)
   } catch (error) {
     console.error('Erreur lors du chargement du type de produit:', error)
-    productType.value = product.value?.typeProduct ?? null
-    structure.value = normalizeProductStructureForSave(productType.value?.structure ?? null)
+    productType.value = embedded ?? null
+    structure.value = normalizeProductStructureForSave(embedded?.structure ?? null)
   }
 }
 
-const hydrateForm = async () => {
+const hydrateForm = () => {
   if (!product.value) {
     return
   }
@@ -618,7 +631,8 @@ const hydrateForm = async () => {
     : ''
   refreshCustomFieldInputs(structure.value, product.value.customFieldValues)
   if (editionForm.constructeurIds.length) {
-    await ensureConstructeurs(editionForm.constructeurIds)
+    // Smart-cached + deduped — fire-and-forget, ConstructeurSelect handles its own loading
+    ensureConstructeurs(editionForm.constructeurIds).catch(() => {})
   }
 }