feat(history): add audit history views for products, pieces and components

- Fix missing <template> tag in product/create.vue causing build error
- Preserve constructeurIds when product already has constructeurs loaded

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

app/components/model-types/ManagementView.vue

@@ -29,10 +29,65 @@
       :total="total"
       :limit="limit"
       :offset="offset"
+      @related="openRelatedModal"
       @edit="openEditPage"
       @delete="confirmDelete"
       @update:offset="onOffsetChange"
     />
+
+    <dialog class="modal" :class="{ 'modal-open': relatedModalOpen }">
+      <div class="modal-box max-w-3xl">
+        <h3 class="text-lg font-bold text-base-content">
+          {{ relatedModalTitle }}
+        </h3>
+        <p class="mt-1 text-sm text-base-content/70">
+          {{ relatedModalSubtitle }}
+        </p>
+
+        <div class="mt-4 rounded-xl border border-base-200 bg-base-100">
+          <div v-if="relatedLoading" class="flex items-center gap-2 px-4 py-6 text-sm text-info">
+            <span class="loading loading-spinner loading-sm" aria-hidden="true"></span>
+            Chargement des éléments liés…
+          </div>
+
+          <div v-else-if="relatedError" class="px-4 py-6 text-sm text-error">
+            {{ relatedError }}
+          </div>
+
+          <div
+            v-else-if="relatedItems.length === 0"
+            class="px-4 py-6 text-sm text-base-content/60"
+          >
+            Aucun élément lié à cette catégorie.
+          </div>
+
+          <ul v-else class="max-h-96 divide-y divide-base-200 overflow-y-auto">
+            <li
+              v-for="entry in relatedItems"
+              :key="entry.id"
+              class="px-2 py-1"
+            >
+              <button
+                type="button"
+                class="flex w-full flex-col gap-1 rounded-lg px-2 py-2 text-left hover:bg-base-200 focus:bg-base-200 focus:outline-none"
+                @click="openRelatedEdit(entry)"
+              >
+                <span class="font-medium text-base-content">{{ entry.name }}</span>
+                <span v-if="entry.reference" class="text-xs text-base-content/60">
+                  Référence: {{ entry.reference }}
+                </span>
+              </button>
+            </li>
+          </ul>
+        </div>
+
+        <div class="modal-action">
+          <button type="button" class="btn" @click="closeRelatedModal">
+            Fermer
+          </button>
+        </div>
+      </div>
+    </dialog>
   </main>
 </template>
 
@@ -41,6 +96,7 @@ import { computed, onBeforeUnmount, onMounted, ref, watch } from "vue";
 import { useHead, useRouter } from "#imports";
 import ModelTypesToolbar from "~/components/model-types/Toolbar.vue";
 import ModelTypesTable from "~/components/model-types/Table.vue";
+import { useApi } from "~/composables/useApi";
 import {
   deleteModelType,
   listModelTypes,
@@ -82,6 +138,7 @@ let activeController: AbortController | null = null;
 
 const router = useRouter();
 const { showError, showSuccess } = useToast();
+const { get } = useApi();
 
 const headingText = computed(() => props.heading);
 const descriptionText = computed(
@@ -257,6 +314,165 @@ const confirmDelete = async (item: ModelType) => {
   }
 };
 
+type RelatedEntry = {
+  id: string;
+  name: string;
+  reference?: string | null;
+};
+
+const relatedModalOpen = ref(false);
+const relatedLoading = ref(false);
+const relatedError = ref<string | null>(null);
+const relatedItems = ref<RelatedEntry[]>([]);
+const relatedType = ref<ModelType | null>(null);
+
+const relatedCategoryLabels: Record<
+  ModelCategory,
+  { plural: string; singular: string }
+> = {
+  COMPONENT: { plural: "composants", singular: "composant" },
+  PIECE: { plural: "pièces", singular: "pièce" },
+  PRODUCT: { plural: "produits", singular: "produit" },
+};
+
+const relatedModalTitle = computed(() => {
+  const current = relatedType.value;
+  if (!current) {
+    return "Éléments liés";
+  }
+  return `Éléments liés à « ${current.name} »`;
+});
+
+const relatedModalSubtitle = computed(() => {
+  const current = relatedType.value;
+  if (!current) {
+    return "";
+  }
+  const labels =
+    relatedCategoryLabels[current.category] ?? relatedCategoryLabels.COMPONENT;
+  const count = relatedItems.value.length;
+  if (relatedLoading.value) {
+    return `Chargement des ${labels.plural}…`;
+  }
+  if (count === 0) {
+    return `Aucun ${labels.singular} lié.`;
+  }
+  if (count === 1) {
+    return `1 ${labels.singular} lié.`;
+  }
+  return `${count} ${labels.plural} liés.`;
+});
+
+const extractCollection = (payload: any): any[] => {
+  if (Array.isArray(payload)) {
+    return payload;
+  }
+  if (Array.isArray(payload?.member)) {
+    return payload.member;
+  }
+  if (Array.isArray(payload?.["hydra:member"])) {
+    return payload["hydra:member"];
+  }
+  if (Array.isArray(payload?.items)) {
+    return payload.items;
+  }
+  return [];
+};
+
+const buildModelTypeIri = (id: string) => `/api/model_types/${id}`;
+
+const resolveRelatedConfig = (category: ModelCategory) => {
+  if (category === "COMPONENT") {
+    return { endpoint: "/composants", filterKey: "typeComposant" };
+  }
+  if (category === "PIECE") {
+    return { endpoint: "/pieces", filterKey: "typePiece" };
+  }
+  return { endpoint: "/products", filterKey: "typeProduct" };
+};
+
+const resolveRelatedEditBasePath = (category: ModelCategory) => {
+  if (category === "COMPONENT") {
+    return "/component";
+  }
+  if (category === "PIECE") {
+    return "/pieces";
+  }
+  return "/product";
+};
+
+const mapRelatedEntry = (item: any): RelatedEntry | null => {
+  if (!item || typeof item !== "object" || typeof item.id !== "string") {
+    return null;
+  }
+  const name =
+    typeof item.name === "string" && item.name.trim()
+      ? item.name
+      : "Sans nom";
+  const reference =
+    typeof item.reference === "string" && item.reference.trim()
+      ? item.reference
+      : typeof item.code === "string" && item.code.trim()
+        ? item.code
+        : null;
+  return {
+    id: item.id,
+    name,
+    reference,
+  };
+};
+
+const loadRelatedItems = async (item: ModelType) => {
+  const { endpoint, filterKey } = resolveRelatedConfig(item.category);
+  const params = new URLSearchParams();
+  params.set("itemsPerPage", "200");
+  params.set(filterKey, buildModelTypeIri(item.id));
+  params.set("order[name]", "asc");
+
+  relatedLoading.value = true;
+  relatedError.value = null;
+  relatedItems.value = [];
+
+  try {
+    const result = await get(`${endpoint}?${params.toString()}`);
+    if (!result.success) {
+      relatedError.value =
+        result.error ?? "Impossible de charger les éléments liés.";
+      return;
+    }
+    const collection = extractCollection(result.data);
+    relatedItems.value = collection
+      .map(mapRelatedEntry)
+      .filter((entry): entry is RelatedEntry => Boolean(entry));
+  } catch (error) {
+    relatedError.value = extractErrorMessage(error);
+  } finally {
+    relatedLoading.value = false;
+  }
+};
+
+const openRelatedModal = (item: ModelType) => {
+  relatedType.value = item;
+  relatedModalOpen.value = true;
+  void loadRelatedItems(item);
+};
+
+const openRelatedEdit = (entry: RelatedEntry) => {
+  const current = relatedType.value;
+  if (!current) {
+    return;
+  }
+  const basePath = resolveRelatedEditBasePath(current.category);
+  relatedModalOpen.value = false;
+  router.push(`${basePath}/${entry.id}/edit`).catch(() => {
+    showError("Navigation impossible vers la fiche d'édition.");
+  });
+};
+
+const closeRelatedModal = () => {
+  relatedModalOpen.value = false;
+};
+
 watch(
   () => searchInput.value,
   (value) => {

app/components/model-types/ModelTypeForm.vue

@@ -108,6 +108,15 @@
       </template>
     </section>
 
+    <div
+      v-if="disableSubmit"
+      class="alert alert-warning"
+      role="alert"
+      aria-live="polite"
+    >
+      <span>{{ disableSubmitMessage }}</span>
+    </div>
+
     <footer class="flex flex-col gap-3 border-t border-base-300 pt-4 sm:flex-row sm:justify-end">
       <button type="button" class="btn btn-ghost" :disabled="saving" @click="emit('cancel')">
         Annuler
@@ -150,6 +159,8 @@ const props = withDefaults(defineProps<{
   structureLoading?: boolean
   allowComponentSubcomponents?: boolean
   componentSubcomponentMaxDepth?: number
+  disableSubmit?: boolean
+  disableSubmitMessage?: string
 }>(), {
   initialData: null,
   saving: false,
@@ -157,6 +168,8 @@ const props = withDefaults(defineProps<{
   structureLoading: false,
   allowComponentSubcomponents: true,
   componentSubcomponentMaxDepth: 1,
+  disableSubmit: false,
+  disableSubmitMessage: '',
 })
 
 const emit = defineEmits<{
@@ -173,6 +186,12 @@ const componentSubcomponentMaxDepth = computed(() =>
     ? props.componentSubcomponentMaxDepth
     : 1,
 )
+const disableSubmit = computed(() => props.disableSubmit === true)
+const disableSubmitMessage = computed(() =>
+  (props.disableSubmitMessage && props.disableSubmitMessage.trim())
+    ? props.disableSubmitMessage
+    : 'Cette catégorie ne peut pas être modifiée car des éléments y sont déjà liés.',
+)
 
 const form = reactive<ModelTypePayload>({
   name: '',
@@ -248,7 +267,7 @@ const resetForm = () => {
 }
 
 const submitLabel = computed(() => (props.mode === 'edit' ? 'Enregistrer' : 'Créer'))
-const isSubmitDisabled = computed(() => saving.value || structureLoading.value)
+const isSubmitDisabled = computed(() => saving.value || structureLoading.value || disableSubmit.value)
 
 const validate = () => {
   errors.name = undefined

app/components/model-types/Table.vue

@@ -34,7 +34,7 @@
             <tr class="text-base-content/70">
               <th scope="col">Nom</th>
               <th scope="col">Notes</th>
-              <th scope="col" class="w-32 text-right">Actions</th>
+              <th scope="col" class="w-48 text-right">Actions</th>
             </tr>
           </thead>
           <tbody>
@@ -45,6 +45,9 @@
                 <span v-else class="text-base-content/50">—</span>
               </td>
               <td class="text-right space-x-2">
+                <button type="button" class="btn btn-ghost btn-sm" @click="emit('related', item)">
+                  Liés
+                </button>
                 <button type="button" class="btn btn-ghost btn-sm" @click="emit('edit', item)">
                   Éditer
                 </button>
@@ -72,6 +75,9 @@
           <p class="mt-3 text-sm text-base-content/80" v-if="item.notes">{{ item.notes }}</p>
           <p class="mt-3 text-sm text-base-content/50" v-else>Pas de notes</p>
           <footer class="mt-4 flex flex-wrap items-center gap-2 justify-end">
+            <button type="button" class="btn btn-ghost btn-sm" @click="emit('related', item)">
+              Liés
+            </button>
             <button type="button" class="btn btn-ghost btn-sm" @click="emit('edit', item)">
               Éditer
             </button>
@@ -123,6 +129,7 @@ const props = defineProps<{
 }>();
 
 const emit = defineEmits<{
+  (e: 'related', item: ModelType): void;
   (e: 'edit', item: ModelType): void;
   (e: 'delete', item: ModelType): void;
   (e: 'update:offset', offset: number): void;

app/composables/useCategoryEditGuard.ts

@@ -0,0 +1,101 @@
+import { computed, ref } from 'vue'
+import { useApi } from '~/composables/useApi'
+import { useToast } from '~/composables/useToast'
+
+type GuardLabels = {
+  singular: string
+  plural: string
+  verifying: string
+}
+
+type GuardConfig = {
+  endpoint: string
+  filterKey: string
+  labels: GuardLabels
+}
+
+const extractTotal = (payload: any, fallbackLength: number) => {
+  if (typeof payload?.totalItems === 'number') {
+    return payload.totalItems
+  }
+  if (typeof payload?.['hydra:totalItems'] === 'number') {
+    return payload['hydra:totalItems']
+  }
+  if (Array.isArray(payload?.member)) {
+    return payload.member.length
+  }
+  if (Array.isArray(payload?.['hydra:member'])) {
+    return payload['hydra:member'].length
+  }
+  return fallbackLength
+}
+
+export function useCategoryEditGuard (config: GuardConfig) {
+  const { get } = useApi()
+  const { showError } = useToast()
+
+  const linkedCount = ref(0)
+  const linkedLoading = ref(false)
+
+  const loadLinkedCount = async (modelTypeId: string) => {
+    linkedLoading.value = true
+    try {
+      const params = new URLSearchParams()
+      params.set('itemsPerPage', '1')
+      params.set(config.filterKey, `/api/model_types/${modelTypeId}`)
+
+      const result = await get(`${config.endpoint}?${params.toString()}`)
+      if (!result.success) {
+        linkedCount.value = 0
+        return
+      }
+
+      const fallbackLength = Array.isArray(result.data?.member)
+        ? result.data.member.length
+        : Array.isArray(result.data?.['hydra:member'])
+          ? result.data['hydra:member'].length
+          : 0
+
+      linkedCount.value = extractTotal(result.data, fallbackLength)
+    } catch (error) {
+      linkedCount.value = 0
+    } finally {
+      linkedLoading.value = false
+    }
+  }
+
+  const isSubmitBlocked = computed(
+    () => linkedLoading.value || linkedCount.value > 0,
+  )
+
+  const submitBlockMessage = computed(() => {
+    if (linkedLoading.value) {
+      return config.labels.verifying
+    }
+    if (linkedCount.value <= 0) {
+      return ''
+    }
+    if (linkedCount.value === 1) {
+      return `Modification bloquée : 1 ${config.labels.singular} est déjà lié à cette catégorie.`
+    }
+    return `Modification bloquée : ${linkedCount.value} ${config.labels.plural} sont déjà liés à cette catégorie.`
+  })
+
+  const guardSubmitOrNotify = () => {
+    if (!isSubmitBlocked.value) {
+      return false
+    }
+    showError(submitBlockMessage.value || 'Modification bloquée pour cette catégorie.')
+    return true
+  }
+
+  return {
+    linkedCount,
+    linkedLoading,
+    isSubmitBlocked,
+    submitBlockMessage,
+    loadLinkedCount,
+    guardSubmitOrNotify,
+  }
+}
+

app/composables/useComponentHistory.ts

@@ -0,0 +1,67 @@
+import { ref } from 'vue'
+import { useApi } from '~/composables/useApi'
+
+export type ComponentHistoryActor = {
+  id: string
+  label: string
+}
+
+export type ComponentHistoryEntry = {
+  id: string
+  action: 'create' | 'update' | 'delete' | string
+  createdAt: string
+  actor: ComponentHistoryActor | null
+  diff: Record<string, { from: unknown; to: unknown }> | null
+  snapshot: Record<string, unknown> | null
+}
+
+const extractItems = (payload: any): ComponentHistoryEntry[] => {
+  if (Array.isArray(payload?.items)) {
+    return payload.items
+  }
+  if (Array.isArray(payload?.member)) {
+    return payload.member
+  }
+  if (Array.isArray(payload?.['hydra:member'])) {
+    return payload['hydra:member']
+  }
+  return []
+}
+
+export function useComponentHistory () {
+  const { get } = useApi()
+
+  const history = ref<ComponentHistoryEntry[]>([])
+  const loading = ref(false)
+  const error = ref<string | null>(null)
+
+  const loadHistory = async (componentId: string) => {
+    loading.value = true
+    error.value = null
+    try {
+      const result = await get(`/composants/${componentId}/history`)
+      if (!result.success) {
+        error.value = result.error ?? 'Impossible de charger l’historique.'
+        history.value = []
+        return result
+      }
+      history.value = extractItems(result.data) as ComponentHistoryEntry[]
+      return { success: true, data: history.value }
+    } catch (err: any) {
+      const message = err?.message ?? 'Erreur inconnue'
+      error.value = message
+      history.value = []
+      return { success: false, error: message }
+    } finally {
+      loading.value = false
+    }
+  }
+
+  return {
+    history,
+    loading,
+    error,
+    loadHistory,
+  }
+}
+

app/composables/usePieceHistory.ts

@@ -0,0 +1,67 @@
+import { ref } from 'vue'
+import { useApi } from '~/composables/useApi'
+
+export type PieceHistoryActor = {
+  id: string
+  label: string
+}
+
+export type PieceHistoryEntry = {
+  id: string
+  action: 'create' | 'update' | 'delete' | string
+  createdAt: string
+  actor: PieceHistoryActor | null
+  diff: Record<string, { from: unknown; to: unknown }> | null
+  snapshot: Record<string, unknown> | null
+}
+
+const extractItems = (payload: any): PieceHistoryEntry[] => {
+  if (Array.isArray(payload?.items)) {
+    return payload.items
+  }
+  if (Array.isArray(payload?.member)) {
+    return payload.member
+  }
+  if (Array.isArray(payload?.['hydra:member'])) {
+    return payload['hydra:member']
+  }
+  return []
+}
+
+export function usePieceHistory () {
+  const { get } = useApi()
+
+  const history = ref<PieceHistoryEntry[]>([])
+  const loading = ref(false)
+  const error = ref<string | null>(null)
+
+  const loadHistory = async (pieceId: string) => {
+    loading.value = true
+    error.value = null
+    try {
+      const result = await get(`/pieces/${pieceId}/history`)
+      if (!result.success) {
+        error.value = result.error ?? 'Impossible de charger l’historique.'
+        history.value = []
+        return result
+      }
+      history.value = extractItems(result.data) as PieceHistoryEntry[]
+      return { success: true, data: history.value }
+    } catch (err: any) {
+      const message = err?.message ?? 'Erreur inconnue'
+      error.value = message
+      history.value = []
+      return { success: false, error: message }
+    } finally {
+      loading.value = false
+    }
+  }
+
+  return {
+    history,
+    loading,
+    error,
+    loadHistory,
+  }
+}
+

app/composables/useProductHistory.ts

@@ -0,0 +1,67 @@
+import { ref } from 'vue'
+import { useApi } from '~/composables/useApi'
+
+export type ProductHistoryActor = {
+  id: string
+  label: string
+}
+
+export type ProductHistoryEntry = {
+  id: string
+  action: 'create' | 'update' | 'delete' | string
+  createdAt: string
+  actor: ProductHistoryActor | null
+  diff: Record<string, { from: unknown; to: unknown }> | null
+  snapshot: Record<string, unknown> | null
+}
+
+const extractItems = (payload: any): ProductHistoryEntry[] => {
+  if (Array.isArray(payload?.items)) {
+    return payload.items
+  }
+  if (Array.isArray(payload?.member)) {
+    return payload.member
+  }
+  if (Array.isArray(payload?.['hydra:member'])) {
+    return payload['hydra:member']
+  }
+  return []
+}
+
+export function useProductHistory () {
+  const { get } = useApi()
+
+  const history = ref<ProductHistoryEntry[]>([])
+  const loading = ref(false)
+  const error = ref<string | null>(null)
+
+  const loadHistory = async (productId: string) => {
+    loading.value = true
+    error.value = null
+    try {
+      const result = await get(`/products/${productId}/history`)
+      if (!result.success) {
+        error.value = result.error ?? 'Impossible de charger l’historique.'
+        history.value = []
+        return result
+      }
+      history.value = extractItems(result.data) as ProductHistoryEntry[]
+      return { success: true, data: history.value }
+    } catch (err: any) {
+      const message = err?.message ?? 'Erreur inconnue'
+      error.value = message
+      history.value = []
+      return { success: false, error: message }
+    } finally {
+      loading.value = false
+    }
+  }
+
+  return {
+    history,
+    loading,
+    error,
+    loadHistory,
+  }
+}
+

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

@@ -26,6 +26,8 @@
         :initial-data="initialData"
         :lock-category="true"
         :saving="saving"
+        :disable-submit="isSubmitBlocked"
+        :disable-submit-message="submitBlockMessage"
         @submit="handleSubmit"
         @cancel="handleCancel"
       />
@@ -38,6 +40,7 @@ import { computed, onMounted, ref } from 'vue'
 import { useHead, useRoute, useRouter } from '#imports'
 import ModelTypeForm from '~/components/model-types/ModelTypeForm.vue'
 import { getModelType, updateModelType, type ModelTypePayload } from '~/services/modelTypes'
+import { useCategoryEditGuard } from '~/composables/useCategoryEditGuard'
 import { useToast } from '~/composables/useToast'
 
 const route = useRoute()
@@ -48,6 +51,21 @@ const loading = ref(true)
 const saving = ref(false)
 const initialData = ref<Partial<ModelTypePayload> | null>(null)
 
+const {
+  isSubmitBlocked,
+  submitBlockMessage,
+  loadLinkedCount,
+  guardSubmitOrNotify,
+} = useCategoryEditGuard({
+  endpoint: '/composants',
+  filterKey: 'typeComposant',
+  labels: {
+    singular: 'composant',
+    plural: 'composants',
+    verifying: 'Vérification des composants liés en cours…',
+  },
+})
+
 const title = computed(() =>
   initialData.value?.name
     ? `Modifier « ${initialData.value.name} »`
@@ -88,6 +106,8 @@ const loadCategory = async () => {
       notes: response.notes ?? response.description ?? '',
       structure: response.structure ?? undefined,
     }
+
+    await loadLinkedCount(id)
   } catch (error) {
     showError(normalizeError(error))
     await navigateBackToList()
@@ -101,6 +121,9 @@ const handleCancel = () => {
 }
 
 const handleSubmit = async (payload: Parameters<typeof updateModelType>[1]) => {
+  if (guardSubmitOrNotify()) {
+    return
+  }
   const id = String(route.params.id)
   saving.value = true
   try {

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

@@ -434,6 +434,74 @@
           </p>
         </div>
 
+        <section class="space-y-3 rounded-lg border border-base-200 bg-base-200/40 p-4">
+          <header class="flex items-center justify-between gap-3">
+            <div>
+              <h2 class="font-semibold text-base-content">Historique</h2>
+              <p class="text-xs text-base-content/70">
+                Qui a changé quoi, et quand.
+              </p>
+            </div>
+            <span v-if="historyEntries.length" class="badge badge-outline">
+              {{ historyEntries.length }} entrée{{ historyEntries.length > 1 ? 's' : '' }}
+            </span>
+          </header>
+
+          <div v-if="historyLoading" class="flex items-center gap-2 text-sm text-base-content/70">
+            <span class="loading loading-spinner loading-sm" aria-hidden="true" />
+            Chargement de l’historique…
+          </div>
+
+          <div v-else-if="historyError" class="alert alert-warning">
+            <span>{{ historyError }}</span>
+          </div>
+
+          <p v-else-if="historyEntries.length === 0" class="text-xs text-base-content/70">
+            Aucun changement enregistré pour le moment.
+          </p>
+
+          <ul v-else class="max-h-80 space-y-2 overflow-y-auto pr-1">
+            <li
+              v-for="entry in historyEntries"
+              :key="entry.id"
+              class="rounded-md border border-base-200 bg-base-100 px-3 py-2"
+            >
+              <div class="flex flex-wrap items-center justify-between gap-2 text-xs text-base-content/70">
+                <span class="font-medium text-base-content">
+                  {{ historyActionLabel(entry.action) }}
+                </span>
+                <span>{{ formatHistoryDate(entry.createdAt) }}</span>
+              </div>
+              <p class="mt-1 text-xs text-base-content/60">
+                Par {{ entry.actor?.label || 'Inconnu' }}
+              </p>
+
+              <ul
+                v-if="historyDiffEntries(entry).length"
+                class="mt-2 space-y-1 text-xs"
+              >
+                <li
+                  v-for="diffEntry in historyDiffEntries(entry)"
+                  :key="`${entry.id}-${diffEntry.field}`"
+                  class="flex flex-col gap-0.5"
+                >
+                  <span class="font-medium text-base-content/80">{{ diffEntry.label }}</span>
+                  <span class="text-base-content/60">
+                    {{ diffEntry.fromLabel }} → {{ diffEntry.toLabel }}
+                  </span>
+                </li>
+              </ul>
+
+              <p
+                v-else-if="entry.snapshot?.name"
+                class="mt-2 text-xs text-base-content/70"
+              >
+                {{ entry.snapshot.name }}
+              </p>
+            </li>
+          </ul>
+        </section>
+
         <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
@@ -466,6 +534,7 @@ import { useToast } from '~/composables/useToast'
 import { extractRelationId } from '~/shared/apiRelations'
 import { useDocuments } from '~/composables/useDocuments'
 import { useConstructeurs } from '~/composables/useConstructeurs'
+import { useComponentHistory, type ComponentHistoryEntry } from '~/composables/useComponentHistory'
 import { formatStructurePreview, normalizeStructureForEditor } from '~/shared/modelUtils'
 import { uniqueConstructeurIds } from '~/shared/constructeurUtils'
 import type { ComponentModelStructure } from '~/shared/types/inventory'
@@ -503,6 +572,12 @@ const { ensureConstructeurs } = useConstructeurs()
 const { upsertCustomFieldValue, updateCustomFieldValue, getCustomFieldValuesByEntity } = useCustomFields()
 const toast = useToast()
 const { loadDocumentsByComponent, uploadDocuments, deleteDocument } = useDocuments()
+const {
+  history,
+  loading: historyLoading,
+  error: historyError,
+  loadHistory,
+} = useComponentHistory()
 
 const component = ref<any | null>(null)
 const loading = ref(true)
@@ -513,6 +588,88 @@ const loadingDocuments = ref(false)
 const componentDocuments = ref<any[]>([])
 const previewDocument = ref<any | null>(null)
 const previewVisible = ref(false)
+
+const historyEntries = computed<ComponentHistoryEntry[]>(() => history.value)
+
+const historyFieldLabels: Record<string, string> = {
+  name: 'Nom',
+  reference: 'Référence',
+  prix: 'Prix',
+  structure: 'Structure',
+  typeComposant: 'Catégorie',
+  product: 'Produit lié',
+  constructeurIds: 'Fournisseurs',
+}
+
+const historyActionLabel = (action: string) => {
+  if (action === 'create') {
+    return 'Création'
+  }
+  if (action === 'delete') {
+    return 'Suppression'
+  }
+  return 'Modification'
+}
+
+const historyDateFormatter = new Intl.DateTimeFormat('fr-FR', {
+  dateStyle: 'medium',
+  timeStyle: 'short',
+})
+
+const formatHistoryDate = (value: string) => {
+  const date = new Date(value)
+  if (Number.isNaN(date.getTime())) {
+    return value
+  }
+  return historyDateFormatter.format(date)
+}
+
+const formatHistoryValue = (value: unknown): string => {
+  if (value === null || value === undefined || value === '') {
+    return '—'
+  }
+  if (Array.isArray(value)) {
+    if (value.length === 0) {
+      return '—'
+    }
+    return value.map((item) => formatHistoryValue(item)).join(', ')
+  }
+  if (typeof value === 'object') {
+    const maybeRecord = value as Record<string, unknown>
+    const name = typeof maybeRecord.name === 'string' ? maybeRecord.name : null
+    const id = typeof maybeRecord.id === 'string' ? maybeRecord.id : null
+    if (name && id) {
+      return `${name} (#${id})`
+    }
+    if (name) {
+      return name
+    }
+    if (id) {
+      return `#${id}`
+    }
+    try {
+      return JSON.stringify(value)
+    } catch (error) {
+      return String(value)
+    }
+  }
+  return String(value)
+}
+
+const historyDiffEntries = (entry: ComponentHistoryEntry) => {
+  const diff = entry.diff ?? {}
+  return Object.entries(diff).map(([field, change]) => {
+    const label = historyFieldLabels[field] ?? field
+    const fromLabel = formatHistoryValue(change?.from)
+    const toLabel = formatHistoryValue(change?.to)
+    return {
+      field,
+      label,
+      fromLabel,
+      toLabel,
+    }
+  })
+}
 const selectedTypeId = ref<string>('')
 const editionForm = reactive({
   name: '' as string,
@@ -756,6 +913,7 @@ const fetchComponent = async () => {
       component.value.customFieldValues = customValues.data
       refreshCustomFieldInputs(undefined, customValues.data)
     }
+    await loadHistory(result.data.id)
   } else {
     component.value = null
     componentDocuments.value = []

app/pages/piece-category/[id]/edit.vue

@@ -26,6 +26,8 @@
         :initial-data="initialData"
         :lock-category="true"
         :saving="saving"
+        :disable-submit="isSubmitBlocked"
+        :disable-submit-message="submitBlockMessage"
         @submit="handleSubmit"
         @cancel="handleCancel"
       />
@@ -38,6 +40,7 @@ import { computed, onMounted, ref } from 'vue'
 import { useHead, useRoute, useRouter } from '#imports'
 import ModelTypeForm from '~/components/model-types/ModelTypeForm.vue'
 import { getModelType, updateModelType, type ModelTypePayload } from '~/services/modelTypes'
+import { useCategoryEditGuard } from '~/composables/useCategoryEditGuard'
 import { useToast } from '~/composables/useToast'
 
 const route = useRoute()
@@ -48,6 +51,21 @@ const loading = ref(true)
 const saving = ref(false)
 const initialData = ref<Partial<ModelTypePayload> | null>(null)
 
+const {
+  isSubmitBlocked,
+  submitBlockMessage,
+  loadLinkedCount,
+  guardSubmitOrNotify,
+} = useCategoryEditGuard({
+  endpoint: '/pieces',
+  filterKey: 'typePiece',
+  labels: {
+    singular: 'pièce',
+    plural: 'pièces',
+    verifying: 'Vérification des pièces liées en cours…',
+  },
+})
+
 const title = computed(() =>
   initialData.value?.name ? `Modifier « ${initialData.value.name} »` : 'Modifier une catégorie de pièce',
 )
@@ -86,6 +104,8 @@ const loadCategory = async () => {
       notes: response.notes ?? response.description ?? '',
       structure: response.structure ?? undefined,
     }
+
+    await loadLinkedCount(id)
   } catch (error) {
     showError(normalizeError(error))
     await navigateBackToList()
@@ -99,6 +119,9 @@ const handleCancel = () => {
 }
 
 const handleSubmit = async (payload: Parameters<typeof updateModelType>[1]) => {
+  if (guardSubmitOrNotify()) {
+    return
+  }
   const id = String(route.params.id)
   saving.value = true
   try {

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

@@ -381,6 +381,74 @@
           </p>
         </div>
 
+        <section class="space-y-3 rounded-lg border border-base-200 bg-base-200/40 p-4">
+          <header class="flex items-center justify-between gap-3">
+            <div>
+              <h2 class="font-semibold text-base-content">Historique</h2>
+              <p class="text-xs text-base-content/70">
+                Qui a changé quoi, et quand.
+              </p>
+            </div>
+            <span v-if="historyEntries.length" class="badge badge-outline">
+              {{ historyEntries.length }} entrée{{ historyEntries.length > 1 ? 's' : '' }}
+            </span>
+          </header>
+
+          <div v-if="historyLoading" class="flex items-center gap-2 text-sm text-base-content/70">
+            <span class="loading loading-spinner loading-sm" aria-hidden="true" />
+            Chargement de l’historique…
+          </div>
+
+          <div v-else-if="historyError" class="alert alert-warning">
+            <span>{{ historyError }}</span>
+          </div>
+
+          <p v-else-if="historyEntries.length === 0" class="text-xs text-base-content/70">
+            Aucun changement enregistré pour le moment.
+          </p>
+
+          <ul v-else class="max-h-80 space-y-2 overflow-y-auto pr-1">
+            <li
+              v-for="entry in historyEntries"
+              :key="entry.id"
+              class="rounded-md border border-base-200 bg-base-100 px-3 py-2"
+            >
+              <div class="flex flex-wrap items-center justify-between gap-2 text-xs text-base-content/70">
+                <span class="font-medium text-base-content">
+                  {{ historyActionLabel(entry.action) }}
+                </span>
+                <span>{{ formatHistoryDate(entry.createdAt) }}</span>
+              </div>
+              <p class="mt-1 text-xs text-base-content/60">
+                Par {{ entry.actor?.label || 'Inconnu' }}
+              </p>
+
+              <ul
+                v-if="historyDiffEntries(entry).length"
+                class="mt-2 space-y-1 text-xs"
+              >
+                <li
+                  v-for="diffEntry in historyDiffEntries(entry)"
+                  :key="`${entry.id}-${diffEntry.field}`"
+                  class="flex flex-col gap-0.5"
+                >
+                  <span class="font-medium text-base-content/80">{{ diffEntry.label }}</span>
+                  <span class="text-base-content/60">
+                    {{ diffEntry.fromLabel }} → {{ diffEntry.toLabel }}
+                  </span>
+                </li>
+              </ul>
+
+              <p
+                v-else-if="entry.snapshot?.name"
+                class="mt-2 text-xs text-base-content/70"
+              >
+                {{ entry.snapshot.name }}
+              </p>
+            </li>
+          </ul>
+        </section>
+
         <div class="flex flex-col gap-3 md:flex-row md:justify-end">
           <NuxtLink to="/pieces-catalog" class="btn btn-ghost" :class="{ 'btn-disabled': saving }">
             Annuler
@@ -409,6 +477,7 @@ import { useApi } from '~/composables/useApi'
 import { useToast } from '~/composables/useToast'
 import { useDocuments } from '~/composables/useDocuments'
 import { useConstructeurs } from '~/composables/useConstructeurs'
+import { usePieceHistory, type PieceHistoryEntry } from '~/composables/usePieceHistory'
 import { extractRelationId } from '~/shared/apiRelations'
 import { getFileIcon } from '~/utils/fileIcons'
 import { canPreviewDocument, isImageDocument, isPdfDocument } from '~/utils/documentPreview'
@@ -444,6 +513,12 @@ const { upsertCustomFieldValue, updateCustomFieldValue, getCustomFieldValuesByEn
 const toast = useToast()
 const { loadDocumentsByPiece, uploadDocuments, deleteDocument } = useDocuments()
 const { ensureConstructeurs } = useConstructeurs()
+const {
+  history,
+  loading: historyLoading,
+  error: historyError,
+  loadHistory,
+} = usePieceHistory()
 
 const piece = ref<any | null>(null)
 const loading = ref(true)
@@ -455,6 +530,88 @@ const pieceDocuments = ref<any[]>([])
 const previewDocument = ref<any | null>(null)
 const previewVisible = ref(false)
 
+const historyEntries = computed<PieceHistoryEntry[]>(() => history.value)
+
+const historyFieldLabels: Record<string, string> = {
+  name: 'Nom',
+  reference: 'Référence',
+  prix: 'Prix',
+  typePiece: 'Catégorie',
+  product: 'Produit lié',
+  productIds: 'Produits liés',
+  constructeurIds: 'Fournisseurs',
+}
+
+const historyActionLabel = (action: string) => {
+  if (action === 'create') {
+    return 'Création'
+  }
+  if (action === 'delete') {
+    return 'Suppression'
+  }
+  return 'Modification'
+}
+
+const historyDateFormatter = new Intl.DateTimeFormat('fr-FR', {
+  dateStyle: 'medium',
+  timeStyle: 'short',
+})
+
+const formatHistoryDate = (value: string) => {
+  const date = new Date(value)
+  if (Number.isNaN(date.getTime())) {
+    return value
+  }
+  return historyDateFormatter.format(date)
+}
+
+const formatHistoryValue = (value: unknown): string => {
+  if (value === null || value === undefined || value === '') {
+    return '—'
+  }
+  if (Array.isArray(value)) {
+    if (value.length === 0) {
+      return '—'
+    }
+    return value.map((item) => formatHistoryValue(item)).join(', ')
+  }
+  if (typeof value === 'object') {
+    const maybeRecord = value as Record<string, unknown>
+    const name = typeof maybeRecord.name === 'string' ? maybeRecord.name : null
+    const id = typeof maybeRecord.id === 'string' ? maybeRecord.id : null
+    if (name && id) {
+      return `${name} (#${id})`
+    }
+    if (name) {
+      return name
+    }
+    if (id) {
+      return `#${id}`
+    }
+    try {
+      return JSON.stringify(value)
+    } catch (error) {
+      return String(value)
+    }
+  }
+  return String(value)
+}
+
+const historyDiffEntries = (entry: PieceHistoryEntry) => {
+  const diff = entry.diff ?? {}
+  return Object.entries(diff).map(([field, change]) => {
+    const label = historyFieldLabels[field] ?? field
+    const fromLabel = formatHistoryValue(change?.from)
+    const toLabel = formatHistoryValue(change?.to)
+    return {
+      field,
+      label,
+      fromLabel,
+      toLabel,
+    }
+  })
+}
+
 const selectedTypeId = ref<string>('')
 const pieceTypeDetails = ref<any | null>(null)
 const editionForm = reactive({
@@ -742,6 +899,7 @@ const fetchPiece = async () => {
       refreshCustomFieldInputs(undefined, customValues.data)
     }
     await loadPieceTypeDetails(result.data)
+    await loadHistory(result.data.id)
   } else {
     piece.value = null
     pieceDocuments.value = []

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

@@ -26,6 +26,8 @@
         :initial-data="initialData"
         :lock-category="true"
         :saving="saving"
+        :disable-submit="isSubmitBlocked"
+        :disable-submit-message="submitBlockMessage"
         @submit="handleSubmit"
         @cancel="handleCancel"
       />
@@ -38,6 +40,7 @@ import { computed, onMounted, ref } from 'vue'
 import { useHead, useRoute, useRouter } from '#imports'
 import ModelTypeForm from '~/components/model-types/ModelTypeForm.vue'
 import { getModelType, updateModelType, type ModelTypePayload } from '~/services/modelTypes'
+import { useCategoryEditGuard } from '~/composables/useCategoryEditGuard'
 import { useToast } from '~/composables/useToast'
 
 const route = useRoute()
@@ -48,6 +51,21 @@ const loading = ref(true)
 const saving = ref(false)
 const initialData = ref<Partial<ModelTypePayload> | null>(null)
 
+const {
+  isSubmitBlocked,
+  submitBlockMessage,
+  loadLinkedCount,
+  guardSubmitOrNotify,
+} = useCategoryEditGuard({
+  endpoint: '/products',
+  filterKey: 'typeProduct',
+  labels: {
+    singular: 'produit',
+    plural: 'produits',
+    verifying: 'Vérification des produits liés en cours…',
+  },
+})
+
 const title = computed(() =>
   initialData.value?.name ? `Modifier « ${initialData.value.name} »` : 'Modifier une catégorie de produit',
 )
@@ -86,6 +104,8 @@ const loadCategory = async () => {
       notes: response.notes ?? response.description ?? '',
       structure: response.structure ?? undefined,
     }
+
+    await loadLinkedCount(id)
   } catch (error) {
     showError(normalizeError(error))
     await navigateBackToList()
@@ -99,6 +119,9 @@ const handleCancel = () => {
 }
 
 const handleSubmit = async (payload: Parameters<typeof updateModelType>[1]) => {
+  if (guardSubmitOrNotify()) {
+    return
+  }
   const id = String(route.params.id)
   saving.value = true
   try {

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

@@ -301,6 +301,74 @@
           </p>
         </div>
 
+        <section class="space-y-3 rounded-lg border border-base-200 bg-base-200/40 p-4">
+          <header class="flex items-center justify-between gap-3">
+            <div>
+              <h2 class="font-semibold text-base-content">Historique</h2>
+              <p class="text-xs text-base-content/70">
+                Qui a changé quoi, et quand.
+              </p>
+            </div>
+            <span v-if="historyEntries.length" class="badge badge-outline">
+              {{ historyEntries.length }} entrée{{ historyEntries.length > 1 ? 's' : '' }}
+            </span>
+          </header>
+
+          <div v-if="historyLoading" class="flex items-center gap-2 text-sm text-base-content/70">
+            <span class="loading loading-spinner loading-sm" aria-hidden="true" />
+            Chargement de l’historique…
+          </div>
+
+          <div v-else-if="historyError" class="alert alert-warning">
+            <span>{{ historyError }}</span>
+          </div>
+
+          <p v-else-if="historyEntries.length === 0" class="text-xs text-base-content/70">
+            Aucun changement enregistré pour le moment.
+          </p>
+
+          <ul v-else class="max-h-80 space-y-2 overflow-y-auto pr-1">
+            <li
+              v-for="entry in historyEntries"
+              :key="entry.id"
+              class="rounded-md border border-base-200 bg-base-100 px-3 py-2"
+            >
+              <div class="flex flex-wrap items-center justify-between gap-2 text-xs text-base-content/70">
+                <span class="font-medium text-base-content">
+                  {{ historyActionLabel(entry.action) }}
+                </span>
+                <span>{{ formatHistoryDate(entry.createdAt) }}</span>
+              </div>
+              <p class="mt-1 text-xs text-base-content/60">
+                Par {{ entry.actor?.label || 'Inconnu' }}
+              </p>
+
+              <ul
+                v-if="historyDiffEntries(entry).length"
+                class="mt-2 space-y-1 text-xs"
+              >
+                <li
+                  v-for="diffEntry in historyDiffEntries(entry)"
+                  :key="`${entry.id}-${diffEntry.field}`"
+                  class="flex flex-col gap-0.5"
+                >
+                  <span class="font-medium text-base-content/80">{{ diffEntry.label }}</span>
+                  <span class="text-base-content/60">
+                    {{ diffEntry.fromLabel }} → {{ diffEntry.toLabel }}
+                  </span>
+                </li>
+              </ul>
+
+              <p
+                v-else-if="entry.snapshot?.name"
+                class="mt-2 text-xs text-base-content/70"
+              >
+                {{ entry.snapshot.name }}
+              </p>
+            </li>
+          </ul>
+        </section>
+
         <div class="flex flex-col gap-3 md:flex-row md:justify-end">
           <NuxtLink to="/product-catalog" class="btn btn-ghost" :class="{ 'btn-disabled': saving }">
             Annuler
@@ -329,6 +397,7 @@ import { useCustomFields } from '~/composables/useCustomFields'
 import { useToast } from '~/composables/useToast'
 import { useDocuments } from '~/composables/useDocuments'
 import { useConstructeurs } from '~/composables/useConstructeurs'
+import { useProductHistory, type ProductHistoryEntry } from '~/composables/useProductHistory'
 import { formatProductStructurePreview, normalizeProductStructureForSave } from '~/shared/modelUtils'
 import { uniqueConstructeurIds } from '~/shared/constructeurUtils'
 import { getModelType } from '~/services/modelTypes'
@@ -359,6 +428,12 @@ const {
   deleteDocument: deleteProductDocument,
 } = useDocuments()
 const { ensureConstructeurs } = useConstructeurs()
+const {
+  history,
+  loading: historyLoading,
+  error: historyError,
+  loadHistory,
+} = useProductHistory()
 
 const product = ref<any | null>(null)
 const productType = ref<any | null>(null)
@@ -373,6 +448,86 @@ const productDocuments = ref<any[]>([])
 const previewDocument = ref<any | null>(null)
 const previewVisible = ref(false)
 
+const historyEntries = computed<ProductHistoryEntry[]>(() => history.value)
+
+const historyFieldLabels: Record<string, string> = {
+  name: 'Nom',
+  reference: 'Référence',
+  supplierPrice: 'Prix fournisseur',
+  typeProduct: 'Catégorie',
+  constructeurIds: 'Fournisseurs',
+}
+
+const historyActionLabel = (action: string) => {
+  if (action === 'create') {
+    return 'Création'
+  }
+  if (action === 'delete') {
+    return 'Suppression'
+  }
+  return 'Modification'
+}
+
+const historyDateFormatter = new Intl.DateTimeFormat('fr-FR', {
+  dateStyle: 'medium',
+  timeStyle: 'short',
+})
+
+const formatHistoryDate = (value: string) => {
+  const date = new Date(value)
+  if (Number.isNaN(date.getTime())) {
+    return value
+  }
+  return historyDateFormatter.format(date)
+}
+
+const formatHistoryValue = (value: unknown): string => {
+  if (value === null || value === undefined || value === '') {
+    return '—'
+  }
+  if (Array.isArray(value)) {
+    if (value.length === 0) {
+      return '—'
+    }
+    return value.map((item) => formatHistoryValue(item)).join(', ')
+  }
+  if (typeof value === 'object') {
+    const maybeRecord = value as Record<string, unknown>
+    const name = typeof maybeRecord.name === 'string' ? maybeRecord.name : null
+    const id = typeof maybeRecord.id === 'string' ? maybeRecord.id : null
+    if (name && id) {
+      return `${name} (#${id})`
+    }
+    if (name) {
+      return name
+    }
+    if (id) {
+      return `#${id}`
+    }
+    try {
+      return JSON.stringify(value)
+    } catch (error) {
+      return String(value)
+    }
+  }
+  return String(value)
+}
+
+const historyDiffEntries = (entry: ProductHistoryEntry) => {
+  const diff = entry.diff ?? {}
+  return Object.entries(diff).map(([field, change]) => {
+    const label = historyFieldLabels[field] ?? field
+    const fromLabel = formatHistoryValue(change?.from)
+    const toLabel = formatHistoryValue(change?.to)
+    return {
+      field,
+      label,
+      fromLabel,
+      toLabel,
+    }
+  })
+}
+
 const refreshCustomFieldInputs = (
   structureOverride?: ProductModelStructure | null,
   valuesOverride?: any[] | null,
@@ -509,6 +664,7 @@ const loadProduct = async () => {
     }
     await hydrateForm()
     await refreshDocuments()
+    await loadHistory(result.data.id)
   } else {
     product.value = null
   }

app/services/modelTypes.ts

@@ -128,7 +128,7 @@ export async function listModelTypes(params: ModelTypeListParams = {}, opts: { s
   const query: Record<string, string | number> = {};
 
   if (params.q) {
-    query.q = params.q;
+    query.name = params.q;
   }
   if (params.category) {
     query.category = params.category;