diff --git a/app/app.vue b/app/app.vue
index 6ca6bc8..d2dc2ee 100644
--- a/app/app.vue
+++ b/app/app.vue
@@ -59,132 +59,120 @@
                 Squelettes de machine
               </NuxtLink>
             </li>
-            <li
-              class="dropdown"
-              :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"
-                @click="toggleDropdown('pieces-mobile')"
-                @keydown.enter.prevent="toggleDropdown('pieces-mobile')"
-                @keydown.space.prevent="toggleDropdown('pieces-mobile')"
+            <li class="mt-1 border-t border-base-200 pt-2">
+              <button
+                type="button"
+                class="flex w-full items-center justify-between rounded-md px-2 py-1 text-left transition-colors"
                 :class="
                   isActive('/piece-category') || isActive('/pieces-catalog')
                     ? 'bg-primary text-primary-content font-semibold shadow-sm'
                     : 'text-base-content hover:bg-primary/10 hover:text-primary'
                 "
+                @click="toggleDropdown('pieces-mobile')"
+                @keydown.enter.prevent="toggleDropdown('pieces-mobile')"
+                @keydown.space.prevent="toggleDropdown('pieces-mobile')"
+                :aria-expanded="openDropdown === 'pieces-mobile'"
               >
-                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="/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 des pièces
-                  </NuxtLink>
-                </li>
-                <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>
-              </ul>
+                <span>Pièces</span>
+                <IconLucideChevronRight
+                  class="h-4 w-4 transition-transform"
+                  :class="openDropdown === 'pieces-mobile' ? 'rotate-90' : ''"
+                  aria-hidden="true"
+                />
+              </button>
+              <Transition name="nav-dropdown-mobile">
+                <ul
+                  v-if="openDropdown === 'pieces-mobile'"
+                  class="mt-2 space-y-1 rounded-md border border-base-200 bg-base-100 p-2 shadow-sm overflow-hidden"
+                >
+                  <li>
+                    <NuxtLink
+                      to="/pieces-catalog"
+                      class="rounded-md px-2 py-1 transition-colors block"
+                      :class="
+                        isActive('/pieces-catalog')
+                          ? 'bg-primary/10 text-primary font-semibold'
+                          : 'text-base-content hover:bg-primary/10 hover:text-primary'
+                      "
+                    >
+                      Catalogue des pièces
+                    </NuxtLink>
+                  </li>
+                  <li>
+                    <NuxtLink
+                      to="/piece-category"
+                      class="rounded-md px-2 py-1 transition-colors block"
+                      :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>
+                </ul>
+              </Transition>
             </li>
-            <li
-              class="dropdown"
-              :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"
-                @click="toggleDropdown('component-mobile')"
-                @keydown.enter.prevent="toggleDropdown('component-mobile')"
-                @keydown.space.prevent="toggleDropdown('component-mobile')"
+            <li class="mt-1 border-t border-base-200 pt-2">
+              <button
+                type="button"
+                class="flex w-full items-center justify-between rounded-md px-2 py-1 text-left transition-colors"
                 :class="
-                  isActive('/component-category') ||
-                  isActive('/component-catalog')
+                  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'
                 "
+                @click="toggleDropdown('component-mobile')"
+                @keydown.enter.prevent="toggleDropdown('component-mobile')"
+                @keydown.space.prevent="toggleDropdown('component-mobile')"
+                :aria-expanded="openDropdown === 'component-mobile'"
               >
-                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-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 des composants
-                  </NuxtLink>
-                </li>
-                <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>
-              </ul>
+                <span>Composant</span>
+                <IconLucideChevronRight
+                  class="h-4 w-4 transition-transform"
+                  :class="openDropdown === 'component-mobile' ? 'rotate-90' : ''"
+                  aria-hidden="true"
+                />
+              </button>
+              <Transition name="nav-dropdown-mobile">
+                <ul
+                  v-if="openDropdown === 'component-mobile'"
+                  class="mt-2 space-y-1 rounded-md border border-base-200 bg-base-100 p-2 shadow-sm overflow-hidden"
+                >
+                  <li>
+                    <NuxtLink
+                      to="/component-catalog"
+                      class="block 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 des composants
+                    </NuxtLink>
+                  </li>
+                  <li>
+                    <NuxtLink
+                      to="/component-category"
+                      class="block 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>
+                </ul>
+              </Transition>
             </li>
-            <li
-              class="dropdown"
-              :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"
-                @click="toggleDropdown('resources-mobile')"
-                @keydown.enter.prevent="toggleDropdown('resources-mobile')"
-                @keydown.space.prevent="toggleDropdown('resources-mobile')"
+            <li class="mt-1 border-t border-base-200 pt-2">
+              <button
+                type="button"
+                class="flex w-full items-center justify-between rounded-md px-2 py-1 text-left transition-colors"
                 :class="
                   isActive('/sites') ||
                   isActive('/documents') ||
@@ -192,53 +180,64 @@
                     ? 'bg-primary text-primary-content font-semibold shadow-sm'
                     : 'text-base-content hover:bg-primary/10 hover:text-primary'
                 "
+                @click="toggleDropdown('resources-mobile')"
+                @keydown.enter.prevent="toggleDropdown('resources-mobile')"
+                @keydown.space.prevent="toggleDropdown('resources-mobile')"
+                :aria-expanded="openDropdown === 'resources-mobile'"
               >
-                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>
+                <span>Ressources liées</span>
+                <IconLucideChevronRight
+                  class="h-4 w-4 transition-transform"
+                  :class="openDropdown === 'resources-mobile' ? 'rotate-90' : ''"
+                  aria-hidden="true"
+                />
+              </button>
+              <Transition name="nav-dropdown-mobile">
+                <ul
+                  v-if="openDropdown === 'resources-mobile'"
+                  class="mt-2 space-y-1 rounded-md border border-base-200 bg-base-100 p-2 shadow-sm overflow-hidden"
+                >
+                  <li>
+                    <NuxtLink
+                      to="/sites"
+                      class="block 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="block 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="block 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>
+              </Transition>
             </li>
           </ul>
         </div>
@@ -297,131 +296,138 @@
             </NuxtLink>
           </li>
           <li
-            class="dropdown"
-            :class="{ 'dropdown-open': openDropdown === 'pieces-desktop' }"
+            class="relative"
             @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"
-              @click="toggleDropdown('pieces-desktop')"
-              @keydown.enter.prevent="toggleDropdown('pieces-desktop')"
-              @keydown.space.prevent="toggleDropdown('pieces-desktop')"
+            <button
+              type="button"
+              class="inline-flex items-center gap-1 rounded-md px-3 py-2 transition-colors"
               :class="
                 isActive('/piece-category') || isActive('/pieces-catalog')
                   ? 'bg-primary text-primary-content font-semibold shadow-sm'
                   : 'text-base-content hover:bg-primary/10 hover:text-primary'
               "
+              @click="toggleDropdown('pieces-desktop')"
+              @keydown.enter.prevent="toggleDropdown('pieces-desktop')"
+              @keydown.space.prevent="toggleDropdown('pieces-desktop')"
+              :aria-expanded="openDropdown === 'pieces-desktop'"
             >
               Pièces
-            </div>
-            <ul
-              tabindex="0"
-              class="dropdown-content z-[1] menu p-2 shadow bg-base-100 rounded-box w-60"
-            >
-              <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 des pièces
-                </NuxtLink>
-              </li>
-            </ul>
+              <IconLucideChevronRight
+                class="h-4 w-4 transition-transform"
+                :class="openDropdown === 'pieces-desktop' ? 'rotate-90' : ''"
+                aria-hidden="true"
+              />
+            </button>
+            <Transition name="nav-dropdown-desktop">
+              <ul
+                v-if="openDropdown === 'pieces-desktop'"
+                class="absolute left-0 top-full mt-2 w-60 rounded-lg border border-base-200 bg-base-100 p-2 shadow-lg z-50"
+              >
+                <li>
+                  <NuxtLink
+                    to="/piece-category"
+                    class="block 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="block 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 des pièces
+                  </NuxtLink>
+                </li>
+              </ul>
+            </Transition>
           </li>
           <li
-            class="dropdown"
-            :class="{ 'dropdown-open': openDropdown === 'component-desktop' }"
+            class="relative"
             @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"
-              @click="toggleDropdown('component-desktop')"
-              @keydown.enter.prevent="toggleDropdown('component-desktop')"
-              @keydown.space.prevent="toggleDropdown('component-desktop')"
+            <button
+              type="button"
+              class="inline-flex items-center gap-1 rounded-md px-3 py-2 transition-colors"
               :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'
               "
+              @click="toggleDropdown('component-desktop')"
+              @keydown.enter.prevent="toggleDropdown('component-desktop')"
+              @keydown.space.prevent="toggleDropdown('component-desktop')"
+              :aria-expanded="openDropdown === 'component-desktop'"
             >
               Composant
-            </div>
-            <ul
-              tabindex="0"
-              class="dropdown-content z-[1] menu p-2 shadow bg-base-100 rounded-box w-64"
-            >
-              <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 des composants
-                </NuxtLink>
-              </li>
-            </ul>
+              <IconLucideChevronRight
+                class="h-4 w-4 transition-transform"
+                :class="openDropdown === 'component-desktop' ? 'rotate-90' : ''"
+                aria-hidden="true"
+              />
+            </button>
+            <Transition name="nav-dropdown-desktop">
+              <ul
+                v-if="openDropdown === 'component-desktop'"
+                class="absolute left-0 top-full mt-2 w-64 rounded-lg border border-base-200 bg-base-100 p-2 shadow-lg z-50"
+              >
+                <li>
+                  <NuxtLink
+                    to="/component-category"
+                    class="block 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="block 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 des composants
+                  </NuxtLink>
+                </li>
+              </ul>
+            </Transition>
           </li>
           <li
-            class="dropdown"
-            :class="{ 'dropdown-open': openDropdown === 'resources-desktop' }"
+            class="relative"
             @mouseenter="setDropdown('resources-desktop')"
             @mouseleave="scheduleDropdownClose('resources-desktop')"
             @focusin="setDropdown('resources-desktop')"
             @focusout="scheduleDropdownClose('resources-desktop')"
           >
-            <div
-              tabindex="0"
-              role="button"
-              class="transition-colors px-3 py-2 rounded-md inline-flex items-center gap-1 cursor-pointer"
-              @click="toggleDropdown('resources-desktop')"
-              @keydown.enter.prevent="toggleDropdown('resources-desktop')"
-              @keydown.space.prevent="toggleDropdown('resources-desktop')"
+            <button
+              type="button"
+              class="inline-flex items-center gap-1 rounded-md px-3 py-2 transition-colors"
               :class="
                 isActive('/sites') ||
                 isActive('/documents') ||
@@ -429,53 +435,64 @@
                   ? 'bg-primary text-primary-content font-semibold shadow-sm'
                   : 'text-base-content hover:bg-primary/10 hover:text-primary'
               "
+              @click="toggleDropdown('resources-desktop')"
+              @keydown.enter.prevent="toggleDropdown('resources-desktop')"
+              @keydown.space.prevent="toggleDropdown('resources-desktop')"
+              :aria-expanded="openDropdown === 'resources-desktop'"
             >
               Ressources liées
-            </div>
-            <ul
-              tabindex="0"
-              class="dropdown-content z-[1] menu p-2 shadow bg-base-100 rounded-box w-60"
-            >
-              <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>
+              <IconLucideChevronRight
+                class="h-4 w-4 transition-transform"
+                :class="openDropdown === 'resources-desktop' ? 'rotate-90' : ''"
+                aria-hidden="true"
+              />
+            </button>
+            <Transition name="nav-dropdown-desktop">
+              <ul
+                v-if="openDropdown === 'resources-desktop'"
+                class="absolute left-0 top-full mt-2 w-60 rounded-lg border border-base-200 bg-base-100 p-2 shadow-lg z-50"
+              >
+                <li>
+                  <NuxtLink
+                    to="/sites"
+                    class="block 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="block 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="block 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>
+            </Transition>
           </li>
         </ul>
       </div>
@@ -567,7 +584,7 @@
 </template>
 
 <script setup>
-import { ref, computed, onMounted, onUnmounted } from "vue";
+import { ref, computed, onMounted, onUnmounted, watch } from "vue";
 import { useRoute, navigateTo, useRuntimeConfig } from "#imports";
 import { useProfileSession } from "~/composables/useProfileSession";
 import IconLucideMenu from "~icons/lucide/menu";
@@ -656,6 +673,13 @@ const toggleDropdown = (name) => {
   setDropdown(name);
 };
 
+watch(
+  () => route.fullPath,
+  () => {
+    closeDropdownNow();
+  },
+);
+
 const activeProfileLabel = computed(() => {
   if (!activeProfile.value) {
     return "Profil inconnu";
@@ -685,3 +709,35 @@ onUnmounted(() => {
   }
 });
 </script>
+
+<style scoped>
+.nav-dropdown-desktop-enter-active,
+.nav-dropdown-desktop-leave-active {
+  transition: opacity 0.15s ease, transform 0.15s ease;
+}
+.nav-dropdown-desktop-enter-from,
+.nav-dropdown-desktop-leave-to {
+  opacity: 0;
+  transform: translateY(0.25rem);
+}
+.nav-dropdown-desktop-enter-to,
+.nav-dropdown-desktop-leave-from {
+  opacity: 1;
+  transform: translateY(0);
+}
+
+.nav-dropdown-mobile-enter-active,
+.nav-dropdown-mobile-leave-active {
+  transition: max-height 0.2s ease, opacity 0.2s ease;
+}
+.nav-dropdown-mobile-enter-from,
+.nav-dropdown-mobile-leave-to {
+  max-height: 0;
+  opacity: 0;
+}
+.nav-dropdown-mobile-enter-to,
+.nav-dropdown-mobile-leave-from {
+  max-height: 12rem;
+  opacity: 1;
+}
+</style>
diff --git a/app/components/ComponentItem.vue b/app/components/ComponentItem.vue
index 1f2df0a..9c552cb 100644
--- a/app/components/ComponentItem.vue
+++ b/app/components/ComponentItem.vue
@@ -214,13 +214,21 @@
             class="flex items-center justify-between rounded border border-base-200 bg-base-100 px-3 py-2"
           >
             <div class="flex items-center gap-3 text-sm">
-              <span class="text-xl" :class="documentIcon(document).colorClass">
+              <div class="h-14 w-14 flex-shrink-0 overflow-hidden rounded-md border border-base-200 bg-base-200/70 flex items-center justify-center">
+                <img
+                  v-if="isImageDocument(document) && document.path"
+                  :src="document.path"
+                  class="h-full w-full object-cover"
+                  :alt="`Aperçu de ${document.name}`"
+                >
                 <component
+                  v-else
                   :is="documentIcon(document).component"
                   class="h-6 w-6"
+                  :class="documentIcon(document).colorClass"
                   aria-hidden="true"
                 />
-              </span>
+              </div>
               <div>
                 <div class="font-medium">
                   {{ document.name }}
@@ -309,7 +317,7 @@ import DocumentUpload from './DocumentUpload.vue'
 import ConstructeurSelect from './ConstructeurSelect.vue'
 import { useDocuments } from '~/composables/useDocuments'
 import { getFileIcon } from '~/utils/fileIcons'
-import { canPreviewDocument } from '~/utils/documentPreview'
+import { canPreviewDocument, isImageDocument } from '~/utils/documentPreview'
 import DocumentPreviewModal from '~/components/DocumentPreviewModal.vue'
 import IconLucideChevronRight from '~icons/lucide/chevron-right'
 import { useCustomFields } from '~/composables/useCustomFields'
diff --git a/app/components/DocumentUpload.vue b/app/components/DocumentUpload.vue
index 8f38839..02920b5 100644
--- a/app/components/DocumentUpload.vue
+++ b/app/components/DocumentUpload.vue
@@ -37,12 +37,21 @@
       <ul v-if="selectedFiles.length" class="mt-4 w-full space-y-2 text-left">
         <li v-for="file in selectedFiles" :key="file.name" class="flex items-center justify-between text-sm">
           <div class="flex items-center gap-3">
-            <component
-              :is="getIcon(file).component"
-              class="h-6 w-6"
-              :class="getIcon(file).colorClass"
-              aria-hidden="true"
-            />
+            <div class="h-14 w-14 flex-shrink-0 overflow-hidden rounded-md border border-base-300 bg-base-200/70 flex items-center justify-center">
+              <img
+                v-if="isImageFile(file)"
+                :src="getFilePreview(file)"
+                class="h-full w-full object-cover"
+                :alt="`Aperçu de ${file.name}`"
+              >
+              <component
+                v-else
+                :is="getIcon(file).component"
+                class="h-6 w-6"
+                :class="getIcon(file).colorClass"
+                aria-hidden="true"
+              />
+            </div>
             <div class="flex flex-col">
               <span class="font-medium">{{ file.name }}</span>
               <span class="text-xs text-gray-500">{{ formatSize(file.size) }} • {{ file.type || 'Type inconnu' }}</span>
@@ -58,7 +67,7 @@
 </template>
 
 <script setup>
-import { ref, computed, watch } from 'vue'
+import { ref, computed, watch, onBeforeUnmount } from 'vue'
 import { useToast } from '~/composables/useToast'
 import { getFileIcon } from '~/utils/fileIcons'
 import IconLucideCloudUpload from '~icons/lucide/cloud-upload'
@@ -96,6 +105,30 @@ const dragActive = ref(false)
 const fileInput = ref(null)
 const internalFiles = ref([])
 const { showError } = useToast()
+const previewUrls = new Map()
+
+const isImageFile = (file) => (file?.type || '').startsWith('image/')
+
+const getFilePreview = (file) => {
+  if (!isImageFile(file)) { return null }
+  if (!previewUrls.has(file)) {
+    previewUrls.set(file, URL.createObjectURL(file))
+  }
+  return previewUrls.get(file)
+}
+
+const cleanupRemovedPreviews = (previousFiles = [], nextFiles = []) => {
+  const nextSet = new Set(nextFiles)
+  previousFiles.forEach((file) => {
+    if (!nextSet.has(file)) {
+      const url = previewUrls.get(file)
+      if (url) {
+        URL.revokeObjectURL(url)
+        previewUrls.delete(file)
+      }
+    }
+  })
+}
 
 const selectedFiles = computed(() => internalFiles.value)
 
@@ -103,6 +136,7 @@ watch(
   () => props.modelValue,
   (newValue) => {
     if (Array.isArray(newValue)) {
+      cleanupRemovedPreviews(internalFiles.value, newValue)
       internalFiles.value = [...newValue]
     }
   },
@@ -114,6 +148,7 @@ const triggerFileDialog = () => {
 }
 
 const emitFiles = (files) => {
+  cleanupRemovedPreviews(internalFiles.value, files)
   internalFiles.value = files
   emit('update:modelValue', files)
   emit('files-added', files)
@@ -180,4 +215,11 @@ const formatSize = (size) => {
 const getIcon = (file) => {
   return getFileIcon({ name: file.name, mime: file.type })
 }
+
+onBeforeUnmount(() => {
+  previewUrls.forEach((url) => {
+    URL.revokeObjectURL(url)
+  })
+  previewUrls.clear()
+})
 </script>
diff --git a/app/components/PieceItem.vue b/app/components/PieceItem.vue
index 8b92423..f212b4f 100644
--- a/app/components/PieceItem.vue
+++ b/app/components/PieceItem.vue
@@ -276,13 +276,21 @@
           class="flex items-center justify-between rounded border border-base-200 bg-base-100 px-3 py-2"
         >
           <div class="flex items-center gap-3 text-sm">
-            <span class="text-xl" :class="documentIcon(document).colorClass">
+            <div class="h-14 w-14 flex-shrink-0 overflow-hidden rounded-md border border-base-200 bg-base-200/70 flex items-center justify-center">
+              <img
+                v-if="isImageDocument(document) && document.path"
+                :src="document.path"
+                class="h-full w-full object-cover"
+                :alt="`Aperçu de ${document.name}`"
+              >
               <component
+                v-else
                 :is="documentIcon(document).component"
                 class="h-6 w-6"
+                :class="documentIcon(document).colorClass"
                 aria-hidden="true"
               />
-            </span>
+            </div>
             <div>
               <div class="font-medium">
                 {{ document.name }}
@@ -340,7 +348,7 @@ import { useCustomFields } from "~/composables/useCustomFields";
 import { useToast } from "~/composables/useToast";
 import { useDocuments } from "~/composables/useDocuments";
 import { getFileIcon } from "~/utils/fileIcons";
-import { canPreviewDocument } from "~/utils/documentPreview";
+import { canPreviewDocument, isImageDocument } from "~/utils/documentPreview";
 import DocumentUpload from "~/components/DocumentUpload.vue";
 import DocumentPreviewModal from "~/components/DocumentPreviewModal.vue";
 import IconLucidePackage from "~icons/lucide/package";
diff --git a/app/components/sites/SiteEditModal.vue b/app/components/sites/SiteEditModal.vue
index 945c8bf..224addb 100644
--- a/app/components/sites/SiteEditModal.vue
+++ b/app/components/sites/SiteEditModal.vue
@@ -53,9 +53,21 @@
                 class="flex items-center justify-between rounded border border-base-200 bg-base-100 px-3 py-2"
               >
                 <div class="flex items-center gap-3 text-sm">
-                  <span class="text-xl" :class="documentIcon(document).colorClass">
-                    <component :is="documentIcon(document).component" class="h-6 w-6" aria-hidden="true" />
-                  </span>
+                  <div class="h-14 w-14 flex-shrink-0 overflow-hidden rounded-md border border-base-200 bg-base-200/70 flex items-center justify-center">
+                    <img
+                      v-if="isImageDocument(document) && document.path"
+                      :src="document.path"
+                      class="h-full w-full object-cover"
+                      :alt="`Aperçu de ${document.name}`"
+                    >
+                    <component
+                      v-else
+                      :is="documentIcon(document).component"
+                      class="h-6 w-6"
+                      :class="documentIcon(document).colorClass"
+                      aria-hidden="true"
+                    />
+                  </div>
                   <div>
                     <div class="font-medium">
                       {{ document.name }}
@@ -103,6 +115,7 @@
 
 <script setup>
 import { computed, toRefs } from 'vue'
+import { isImageDocument } from '~/utils/documentPreview'
 import DocumentUpload from '~/components/DocumentUpload.vue'
 import SiteContactFormFields from '~/components/sites/SiteContactFormFields.vue'
 
diff --git a/app/pages/component/[id]/edit.vue b/app/pages/component/[id]/edit.vue
index a39e8fe..37fae08 100644
--- a/app/pages/component/[id]/edit.vue
+++ b/app/pages/component/[id]/edit.vue
@@ -300,13 +300,21 @@
               class="flex items-center justify-between rounded border border-base-200 bg-base-100 px-3 py-2"
             >
               <div class="flex items-center gap-3 text-sm">
-                <span class="text-xl" :class="documentIcon(document).colorClass">
+                <div class="h-14 w-14 flex-shrink-0 overflow-hidden rounded-md border border-base-200 bg-base-200/70 flex items-center justify-center">
+                  <img
+                    v-if="isImageDocument(document) && document.path"
+                    :src="document.path"
+                    class="h-full w-full object-cover"
+                    :alt="`Aperçu de ${document.name}`"
+                  >
                   <component
+                    v-else
                     :is="documentIcon(document).component"
                     class="h-6 w-6"
+                    :class="documentIcon(document).colorClass"
                     aria-hidden="true"
                   />
-                </span>
+                </div>
                 <div>
                   <div class="font-medium">
                     {{ document.name }}
@@ -379,7 +387,7 @@ import { formatStructurePreview } from '~/shared/modelUtils'
 import type { ComponentModelStructure } from '~/shared/types/inventory'
 import type { ModelType } from '~/services/modelTypes'
 import { getFileIcon } from '~/utils/fileIcons'
-import { canPreviewDocument } from '~/utils/documentPreview'
+import { canPreviewDocument, isImageDocument } from '~/utils/documentPreview'
 
 interface ComponentCatalogType extends ModelType {
   structure: ComponentModelStructure | null
diff --git a/app/pages/machine/[id].vue b/app/pages/machine/[id].vue
index c2e380d..8130822 100644
--- a/app/pages/machine/[id].vue
+++ b/app/pages/machine/[id].vue
@@ -265,13 +265,21 @@
               class="flex items-center justify-between rounded border border-base-200 bg-base-100 px-3 py-2"
             >
               <div class="flex items-center gap-3 text-sm">
-                <span class="text-xl" :class="documentIcon(document).colorClass">
+                <div class="h-14 w-14 flex-shrink-0 overflow-hidden rounded-md border border-base-200 bg-base-200/70 flex items-center justify-center">
+                  <img
+                    v-if="isImageDocument(document) && document.path"
+                    :src="document.path"
+                    class="h-full w-full object-cover"
+                    :alt="`Aperçu de ${document.name}`"
+                  >
                   <component
+                    v-else
                     :is="documentIcon(document).component"
                     class="h-6 w-6"
+                    :class="documentIcon(document).colorClass"
                     aria-hidden="true"
                   />
-                </span>
+                </div>
                 <div>
                   <div class="font-medium">{{ document.name }}</div>
                   <div class="text-xs text-gray-500">
@@ -517,7 +525,7 @@ import { useToast } from '~/composables/useToast'
 import { useDocuments } from '~/composables/useDocuments'
 import { getFileIcon } from '~/utils/fileIcons'
 import { sanitizeDefinitionOverrides } from '~/shared/modelUtils'
-import { canPreviewDocument } from '~/utils/documentPreview'
+import { canPreviewDocument, isImageDocument } from '~/utils/documentPreview'
 import ComponentHierarchy from '~/components/ComponentHierarchy.vue'
 import DocumentUpload from '~/components/DocumentUpload.vue'
 import ConstructeurSelect from '~/components/ConstructeurSelect.vue'
diff --git a/app/pages/machines/new.vue b/app/pages/machines/new.vue
index 9b2dec3..6e3db3b 100644
--- a/app/pages/machines/new.vue
+++ b/app/pages/machines/new.vue
@@ -840,18 +840,6 @@ const formatAssignmentList = (assignments) => {
     .join(', ')
 }
 
-const selectedComponentIds = computed(() => {
-  const ids = []
-  Object.values(componentRequirementSelections).forEach((entries) => {
-    ;(entries || []).forEach((entry) => {
-      if (entry?.composantId) {
-        ids.push(entry.composantId)
-      }
-    })
-  })
-  return ids
-})
-
 const selectedPieceIds = computed(() => {
   const ids = []
   Object.values(pieceRequirementSelections).forEach((entries) => {
@@ -866,21 +854,15 @@ const selectedPieceIds = computed(() => {
 
 const getComponentOptions = (requirement, currentEntry) => {
   const requirementTypeId = requirement?.typeComposantId || requirement?.typeComposant?.id || null
-  const usedIds = new Set(
-    selectedComponentIds.value.filter((id) => id && (!currentEntry || id !== currentEntry.composantId)),
-  )
 
   return componentInventory.value.filter((component) => {
+    if (!component?.id) {
+      return false
+    }
     if (requirementTypeId && component.typeComposantId !== requirementTypeId) {
-      return false
+      return currentEntry?.composantId === component.id
     }
-    if (!component.id) {
-      return false
-    }
-    if (currentEntry?.composantId === component.id) {
-      return true
-    }
-    return !usedIds.has(component.id)
+    return true
   })
 }
 
diff --git a/app/pages/pieces/[id]/edit.vue b/app/pages/pieces/[id]/edit.vue
index 8020e99..6228ef3 100644
--- a/app/pages/pieces/[id]/edit.vue
+++ b/app/pages/pieces/[id]/edit.vue
@@ -270,13 +270,21 @@
               class="flex items-center justify-between rounded border border-base-200 bg-base-100 px-3 py-2"
             >
               <div class="flex items-center gap-3 text-sm">
-                <span class="text-xl" :class="documentIcon(document).colorClass">
+                <div class="h-14 w-14 flex-shrink-0 overflow-hidden rounded-md border border-base-200 bg-base-200/70 flex items-center justify-center">
+                  <img
+                    v-if="isImageDocument(document) && document.path"
+                    :src="document.path"
+                    class="h-full w-full object-cover"
+                    :alt="`Aperçu de ${document.name}`"
+                  >
                   <component
+                    v-else
                     :is="documentIcon(document).component"
                     class="h-6 w-6"
+                    :class="documentIcon(document).colorClass"
                     aria-hidden="true"
                   />
-                </span>
+                </div>
                 <div>
                   <div class="font-medium">
                     {{ document.name }}
@@ -346,7 +354,7 @@ import { useApi } from '~/composables/useApi'
 import { useToast } from '~/composables/useToast'
 import { useDocuments } from '~/composables/useDocuments'
 import { getFileIcon } from '~/utils/fileIcons'
-import { canPreviewDocument } from '~/utils/documentPreview'
+import { canPreviewDocument, isImageDocument } from '~/utils/documentPreview'
 import { formatPieceStructurePreview } from '~/shared/modelUtils'
 import type { PieceModelStructure } from '~/shared/types/inventory'
 import type { ModelType } from '~/services/modelTypes'
diff --git a/app/utils/documentPreview.js b/app/utils/documentPreview.js
index 341a4d2..473bc4a 100644
--- a/app/utils/documentPreview.js
+++ b/app/utils/documentPreview.js
@@ -17,6 +17,8 @@ export const getPreviewType = (document) => {
 
 export const canPreviewDocument = (document = {}) => !!getPreviewType(document)
 
+export const isImageDocument = (document = {}) => getPreviewType(document) === 'image'
+
 export const describeDocument = (document) => {
   if (!document) { return '' }
   const name = document.filename || document.name || ''