diff --git a/app/app.vue b/app/app.vue
index 9fe1fca..d5957a2 100644
--- a/app/app.vue
+++ b/app/app.vue
@@ -37,111 +37,132 @@
             </li>
             <li>
               <NuxtLink
-                to="/types"
+                to="/machine-skeleton"
                 class="rounded-md px-2 py-1 transition-colors"
-                :class="isActive('/types') ? 'bg-primary text-primary-content font-semibold shadow-sm' : 'text-base-content hover:bg-primary/10 hover:text-primary'"
+                :class="isActive('/machine-skeleton') ? 'bg-primary text-primary-content font-semibold shadow-sm' : 'text-base-content hover:bg-primary/10 hover:text-primary'"
               >
-                Schémas de machine
+                Squelettes de machine
               </NuxtLink>
             </li>
-            <li>
-              <details class="group">
-                <summary
-                  class="rounded-md px-2 py-1 transition-colors cursor-pointer"
-                  :class="isActive('/models/pieces') ? 'bg-primary text-primary-content font-semibold shadow-sm' : 'text-base-content hover:bg-primary/10 hover:text-primary'"
-                >
-                  Pièces
-                </summary>
-                <ul class="menu menu-sm bg-base-100 rounded-box p-2 shadow space-y-1">
-                  <li>
-                    <NuxtLink
-                      to="/model-types"
-                      class="rounded-md px-2 py-1 transition-colors"
-                      :class="isActive('/model-types') ? 'bg-primary/10 text-primary font-semibold' : 'text-base-content hover:bg-primary/10 hover:text-primary'"
-                    >
-                      Catégorie de pièce
-                    </NuxtLink>
-                  </li>
-                  <li>
-                    <NuxtLink
-                      to="/models/pieces"
-                      class="rounded-md px-2 py-1 transition-colors"
-                      :class="isActive('/models/pieces') ? 'bg-primary/10 text-primary font-semibold' : 'text-base-content hover:bg-primary/10 hover:text-primary'"
-                    >
-                      Catalogue de pièce
-                    </NuxtLink>
-                  </li>
-                </ul>
-              </details>
+            <li
+              class="dropdown dropdown-hover"
+              :class="{ 'dropdown-open': openDropdown === 'pieces-mobile' }"
+              @mouseenter="setDropdown('pieces-mobile')"
+              @mouseleave="scheduleDropdownClose('pieces-mobile')"
+              @focusin="setDropdown('pieces-mobile')"
+              @focusout="scheduleDropdownClose('pieces-mobile')"
+            >
+              <div
+                tabindex="0"
+                role="button"
+                class="rounded-md px-2 py-1 transition-colors cursor-pointer"
+                :class="(isActive('/pieces-catalog') || isActive('/piece-category')) ? 'bg-primary text-primary-content font-semibold shadow-sm' : 'text-base-content hover:bg-primary/10 hover:text-primary'"
+              >
+                Pièces
+              </div>
+              <ul tabindex="0" class="dropdown-content z-[1] menu menu-sm bg-base-100 rounded-box p-2 shadow space-y-1">
+                <li>
+                  <NuxtLink
+                    to="/piece-category"
+                    class="rounded-md px-2 py-1 transition-colors"
+                    :class="isActive('/piece-category') ? 'bg-primary/10 text-primary font-semibold' : 'text-base-content hover:bg-primary/10 hover:text-primary'"
+                  >
+                    Catégorie de pièce
+                  </NuxtLink>
+                </li>
+                <li>
+                  <NuxtLink
+                    to="/pieces-catalog"
+                    class="rounded-md px-2 py-1 transition-colors"
+                    :class="isActive('/pieces-catalog') ? 'bg-primary/10 text-primary font-semibold' : 'text-base-content hover:bg-primary/10 hover:text-primary'"
+                  >
+                    Catalogue de pièce
+                  </NuxtLink>
+                </li>
+              </ul>
             </li>
-            <li>
-              <details class="group">
-                <summary
-                  class="rounded-md px-2 py-1 transition-colors cursor-pointer"
-                  :class="(isActive('/models/components') || isActive('/model-types')) ? 'bg-primary text-primary-content font-semibold shadow-sm' : 'text-base-content hover:bg-primary/10 hover:text-primary'"
-                >
-                  Composant
-                </summary>
-                <ul class="menu menu-sm bg-base-100 rounded-box p-2 shadow space-y-1">
-                  <li>
-                    <NuxtLink
-                      to="/model-types"
-                      class="rounded-md px-2 py-1 transition-colors"
-                      :class="isActive('/model-types') ? 'bg-primary/10 text-primary font-semibold' : 'text-base-content hover:bg-primary/10 hover:text-primary'"
-                    >
-                      Catégorie de composant
-                    </NuxtLink>
-                  </li>
-                  <li>
-                    <NuxtLink
-                      to="/models/components"
-                      class="rounded-md px-2 py-1 transition-colors"
-                      :class="isActive('/models/components') ? 'bg-primary/10 text-primary font-semibold' : 'text-base-content hover:bg-primary/10 hover:text-primary'"
-                    >
-                      Catalogue de composant
-                    </NuxtLink>
-                  </li>
-                </ul>
-              </details>
+            <li
+              class="dropdown dropdown-hover"
+              :class="{ 'dropdown-open': openDropdown === 'component-mobile' }"
+              @mouseenter="setDropdown('component-mobile')"
+              @mouseleave="scheduleDropdownClose('component-mobile')"
+              @focusin="setDropdown('component-mobile')"
+              @focusout="scheduleDropdownClose('component-mobile')"
+            >
+              <div
+                tabindex="0"
+                role="button"
+                class="rounded-md px-2 py-1 transition-colors cursor-pointer"
+                :class="(isActive('/component-catalog') || isActive('/component-category')) ? 'bg-primary text-primary-content font-semibold shadow-sm' : 'text-base-content hover:bg-primary/10 hover:text-primary'"
+              >
+                Composant
+              </div>
+              <ul tabindex="0" class="dropdown-content z-[1] menu menu-sm bg-base-100 rounded-box p-2 shadow space-y-1">
+                <li>
+                  <NuxtLink
+                    to="/component-category"
+                    class="rounded-md px-2 py-1 transition-colors"
+                    :class="isActive('/component-category') ? 'bg-primary/10 text-primary font-semibold' : 'text-base-content hover:bg-primary/10 hover:text-primary'"
+                  >
+                    Catégorie de composant
+                  </NuxtLink>
+                </li>
+                <li>
+                  <NuxtLink
+                    to="/component-catalog"
+                    class="rounded-md px-2 py-1 transition-colors"
+                    :class="isActive('/component-catalog') ? 'bg-primary/10 text-primary font-semibold' : 'text-base-content hover:bg-primary/10 hover:text-primary'"
+                  >
+                    Catalogue de composant
+                  </NuxtLink>
+                </li>
+              </ul>
             </li>
-            <li>
-              <details class="group">
-                <summary
-                  class="rounded-md px-2 py-1 transition-colors cursor-pointer"
-                  :class="(isActive('/sites') || isActive('/documents') || isActive('/constructeurs')) ? 'bg-primary text-primary-content font-semibold shadow-sm' : 'text-base-content hover:bg-primary/10 hover:text-primary'"
-                >
-                  Ressources liées
-                </summary>
-                <ul class="menu menu-sm bg-base-100 rounded-box p-2 shadow space-y-1">
-                  <li>
-                    <NuxtLink
-                      to="/sites"
-                      class="rounded-md px-2 py-1 transition-colors"
-                      :class="isActive('/sites') ? 'bg-primary/10 text-primary font-semibold' : 'text-base-content hover:bg-primary/10 hover:text-primary'"
-                    >
-                      Sites
-                    </NuxtLink>
-                  </li>
-                  <li>
-                    <NuxtLink
-                      to="/documents"
-                      class="rounded-md px-2 py-1 transition-colors"
-                      :class="isActive('/documents') ? 'bg-primary/10 text-primary font-semibold' : 'text-base-content hover:bg-primary/10 hover:text-primary'"
-                    >
-                      Documents
-                    </NuxtLink>
-                  </li>
-                  <li>
-                    <NuxtLink
-                      to="/constructeurs"
-                      class="rounded-md px-2 py-1 transition-colors"
-                      :class="isActive('/constructeurs') ? 'bg-primary/10 text-primary font-semibold' : 'text-base-content hover:bg-primary/10 hover:text-primary'"
-                    >
-                      Constructeurs
-                    </NuxtLink>
-                  </li>
-                </ul>
-              </details>
+            <li
+              class="dropdown dropdown-hover"
+              :class="{ 'dropdown-open': openDropdown === 'resources-mobile' }"
+              @mouseenter="setDropdown('resources-mobile')"
+              @mouseleave="scheduleDropdownClose('resources-mobile')"
+              @focusin="setDropdown('resources-mobile')"
+              @focusout="scheduleDropdownClose('resources-mobile')"
+            >
+              <div
+                tabindex="0"
+                role="button"
+                class="rounded-md px-2 py-1 transition-colors cursor-pointer"
+                :class="(isActive('/sites') || isActive('/documents') || isActive('/constructeurs')) ? 'bg-primary text-primary-content font-semibold shadow-sm' : 'text-base-content hover:bg-primary/10 hover:text-primary'"
+              >
+                Ressources liées
+              </div>
+              <ul tabindex="0" class="dropdown-content z-[1] menu menu-sm bg-base-100 rounded-box p-2 shadow space-y-1">
+                <li>
+                  <NuxtLink
+                    to="/sites"
+                    class="rounded-md px-2 py-1 transition-colors"
+                    :class="isActive('/sites') ? 'bg-primary/10 text-primary font-semibold' : 'text-base-content hover:bg-primary/10 hover:text-primary'"
+                  >
+                    Sites
+                  </NuxtLink>
+                </li>
+                <li>
+                  <NuxtLink
+                    to="/documents"
+                    class="rounded-md px-2 py-1 transition-colors"
+                    :class="isActive('/documents') ? 'bg-primary/10 text-primary font-semibold' : 'text-base-content hover:bg-primary/10 hover:text-primary'"
+                  >
+                    Documents
+                  </NuxtLink>
+                </li>
+                <li>
+                  <NuxtLink
+                    to="/constructeurs"
+                    class="rounded-md px-2 py-1 transition-colors"
+                    :class="isActive('/constructeurs') ? 'bg-primary/10 text-primary font-semibold' : 'text-base-content hover:bg-primary/10 hover:text-primary'"
+                  >
+                    Constructeurs
+                  </NuxtLink>
+                </li>
+              </ul>
             </li>
           </ul>
         </div>
@@ -176,74 +197,95 @@
           </li>
           <li>
             <NuxtLink
-              to="/types"
+              to="/machine-skeleton"
               class="transition-colors px-3 py-2 rounded-md"
-              :class="isActive('/types') ? 'bg-primary text-primary-content font-semibold shadow-sm' : 'text-base-content hover:bg-primary/10 hover:text-primary'"
+              :class="isActive('/machine-skeleton') ? 'bg-primary text-primary-content font-semibold shadow-sm' : 'text-base-content hover:bg-primary/10 hover:text-primary'"
             >
-              Schémas de machine
+              Squelettes de machine
             </NuxtLink>
           </li>
-          <li class="dropdown dropdown-hover">
+          <li
+            class="dropdown dropdown-hover"
+            :class="{ 'dropdown-open': openDropdown === 'pieces-desktop' }"
+            @mouseenter="setDropdown('pieces-desktop')"
+            @mouseleave="scheduleDropdownClose('pieces-desktop')"
+            @focusin="setDropdown('pieces-desktop')"
+            @focusout="scheduleDropdownClose('pieces-desktop')"
+          >
             <div
               tabindex="0"
               role="button"
               class="transition-colors px-3 py-2 rounded-md inline-flex items-center gap-1 cursor-pointer"
-              :class="isActive('/models/pieces') ? 'bg-primary text-primary-content font-semibold shadow-sm' : 'text-base-content hover:bg-primary/10 hover:text-primary'"
+              :class="(isActive('/pieces-catalog') || isActive('/piece-category')) ? 'bg-primary text-primary-content font-semibold shadow-sm' : 'text-base-content hover:bg-primary/10 hover:text-primary'"
             >
               Pièces
             </div>
             <ul tabindex="0" class="dropdown-content z-[1] menu p-2 shadow bg-base-100 rounded-box w-60">
               <li>
                 <NuxtLink
-                  to="/model-types"
+                  to="/piece-category"
                   class="rounded-md px-2 py-1 transition-colors"
-                  :class="isActive('/model-types') ? 'bg-primary/10 text-primary font-semibold' : 'text-base-content hover:bg-primary/10 hover:text-primary'"
+                  :class="isActive('/piece-category') ? 'bg-primary/10 text-primary font-semibold' : 'text-base-content hover:bg-primary/10 hover:text-primary'"
                 >
                   Catégorie de pièce
                 </NuxtLink>
               </li>
               <li>
                 <NuxtLink
-                  to="/models/pieces"
+                  to="/pieces-catalog"
                   class="rounded-md px-2 py-1 transition-colors"
-                  :class="isActive('/models/pieces') ? 'bg-primary/10 text-primary font-semibold' : 'text-base-content hover:bg-primary/10 hover:text-primary'"
+                  :class="isActive('/pieces-catalog') ? 'bg-primary/10 text-primary font-semibold' : 'text-base-content hover:bg-primary/10 hover:text-primary'"
                 >
                   Catalogue de pièce
                 </NuxtLink>
               </li>
             </ul>
           </li>
-          <li class="dropdown dropdown-hover">
+          <li
+            class="dropdown dropdown-hover"
+            :class="{ 'dropdown-open': openDropdown === 'component-desktop' }"
+            @mouseenter="setDropdown('component-desktop')"
+            @mouseleave="scheduleDropdownClose('component-desktop')"
+            @focusin="setDropdown('component-desktop')"
+            @focusout="scheduleDropdownClose('component-desktop')"
+          >
             <div
               tabindex="0"
               role="button"
               class="transition-colors px-3 py-2 rounded-md inline-flex items-center gap-1 cursor-pointer"
-              :class="(isActive('/model-types') || isActive('/models/components')) ? 'bg-primary text-primary-content font-semibold shadow-sm' : 'text-base-content hover:bg-primary/10 hover:text-primary'"
+              :class="(isActive('/component-category') || isActive('/component-catalog')) ? 'bg-primary text-primary-content font-semibold shadow-sm' : 'text-base-content hover:bg-primary/10 hover:text-primary'"
             >
               Composant
             </div>
             <ul tabindex="0" class="dropdown-content z-[1] menu p-2 shadow bg-base-100 rounded-box w-64">
               <li>
                 <NuxtLink
-                  to="/model-types"
+                  to="/component-category"
                   class="rounded-md px-2 py-1 transition-colors"
-                  :class="isActive('/model-types') ? 'bg-primary/10 text-primary font-semibold' : 'text-base-content hover:bg-primary/10 hover:text-primary'"
+                  :class="isActive('/component-category') ? 'bg-primary/10 text-primary font-semibold' : 'text-base-content hover:bg-primary/10 hover:text-primary'"
                 >
                   Catégorie de composant
                 </NuxtLink>
               </li>
               <li>
                 <NuxtLink
-                  to="/models/components"
+                  to="/component-catalog"
                   class="rounded-md px-2 py-1 transition-colors"
-                  :class="isActive('/models/components') ? 'bg-primary/10 text-primary font-semibold' : 'text-base-content hover:bg-primary/10 hover:text-primary'"
+                  :class="isActive('/component-catalog') ? 'bg-primary/10 text-primary font-semibold' : 'text-base-content hover:bg-primary/10 hover:text-primary'"
                 >
                   Catalogue de composant
                 </NuxtLink>
               </li>
             </ul>
           </li>
-          <li class="dropdown dropdown-hover">
+          <li
+            class="dropdown dropdown-hover"
+            :class="{ 'dropdown-open': openDropdown === 'resources-desktop' }"
+            @mouseenter="setDropdown('resources-desktop')"
+            @mouseleave="scheduleDropdownClose('resources-desktop')"
+            @focusin="setDropdown('resources-desktop')"
+            @focusout="scheduleDropdownClose('resources-desktop')"
+          >
             <div
               tabindex="0"
               role="button"
@@ -382,7 +424,7 @@
 </template>
 
 <script setup>
-import { ref, computed, onMounted } from 'vue'
+import { ref, computed, onMounted, onUnmounted } from 'vue'
 import { useRoute, navigateTo } from '#imports'
 import { useProfileSession } from '~/composables/useProfileSession'
 import IconLucideMenu from '~icons/lucide/menu'
@@ -428,6 +470,31 @@ const handleLogout = async () => {
   await navigateTo('/profiles')
 }
 
+const openDropdown = ref(null)
+let dropdownCloseTimer = null
+
+const setDropdown = (name) => {
+  if (dropdownCloseTimer) {
+    clearTimeout(dropdownCloseTimer)
+    dropdownCloseTimer = null
+  }
+  if (openDropdown.value !== name) {
+    openDropdown.value = name
+  }
+}
+
+const scheduleDropdownClose = (name) => {
+  if (dropdownCloseTimer) {
+    clearTimeout(dropdownCloseTimer)
+  }
+  dropdownCloseTimer = setTimeout(() => {
+    if (openDropdown.value === name) {
+      openDropdown.value = null
+    }
+    dropdownCloseTimer = null
+  }, 200)
+}
+
 const activeProfileLabel = computed(() => {
   if (!activeProfile.value) return 'Profil inconnu'
   return `${activeProfile.value.firstName} ${activeProfile.value.lastName}`
@@ -442,4 +509,11 @@ const activeProfileInitials = computed(() => {
 onMounted(async () => {
   await ensureSession()
 })
+
+onUnmounted(() => {
+  if (dropdownCloseTimer) {
+    clearTimeout(dropdownCloseTimer)
+    dropdownCloseTimer = null
+  }
+})
 </script>