feat(detail) : add consultation pages for piece, composant, product

Add read-only detail pages with edit/view toggle for piece, composant and
product, matching the existing machine detail pattern. Empty fields and
documents section are hidden in consultation mode. Catalogs and cross-links
updated to point to the new detail pages.

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

app/components/ComponentItem.vue

@@ -127,7 +127,7 @@
           </div>
           <NuxtLink
             v-if="component.product?.id"
-            :to="`/product/${component.product.id}/edit`"
+            :to="`/product/${component.product.id}`"
             class="btn btn-ghost btn-xs shrink-0"
           >
             Voir le produit

app/components/DetailHeader.vue

@@ -0,0 +1,40 @@
+<template>
+  <div class="flex flex-col gap-4 md:flex-row md:items-start md:justify-between">
+    <div class="flex flex-col gap-2">
+      <h1 class="text-3xl font-bold">{{ title }}</h1>
+      <p v-if="subtitle" class="text-sm text-base-content/70">{{ subtitle }}</p>
+    </div>
+    <div class="flex items-center gap-2">
+      <button
+        v-if="canEdit"
+        class="btn btn-primary"
+        :class="{ 'btn-outline': isEditMode }"
+        @click="$emit('toggle-edit')"
+      >
+        <IconLucideSquarePen v-if="!isEditMode" class="w-5 h-5 mr-2" aria-hidden="true" />
+        <IconLucideEye v-else class="w-5 h-5 mr-2" aria-hidden="true" />
+        {{ isEditMode ? 'Voir détails' : 'Modifier' }}
+      </button>
+      <NuxtLink :to="backLink" class="btn btn-ghost btn-sm md:btn-md">
+        Retour au catalogue
+      </NuxtLink>
+    </div>
+  </div>
+</template>
+
+<script setup lang="ts">
+import IconLucideSquarePen from '~icons/lucide/square-pen'
+import IconLucideEye from '~icons/lucide/eye'
+
+defineProps<{
+  title: string
+  subtitle?: string
+  isEditMode: boolean
+  canEdit: boolean
+  backLink: string
+}>()
+
+defineEmits<{
+  'toggle-edit': []
+}>()
+</script>

app/components/PieceItem.vue

@@ -180,7 +180,7 @@
             </p>
             <NuxtLink
               v-if="selectedProduct.id"
-              :to="`/product/${selectedProduct.id}/edit`"
+              :to="`/product/${selectedProduct.id}`"
               class="link link-primary text-xs"
             >
               Ouvrir la fiche produit