feat : add applications list page, replace old dashboard

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

frontend/layouts/default.vue

@@ -39,9 +39,9 @@
                 </div>
                 <nav class="flex-1 overflow-hidden" :class="sidebarIsCollapsed ? 'px-1 pb-6' : 'px-4 pb-6'">
                     <SidebarLink
-                        to="/"
-                        icon="mdi:view-dashboard-outline"
-                        label="Tableau de bord"
+                        to="/applications"
+                        icon="mdi:apps"
+                        :label="$t('applications.title')"
                         :collapsed="sidebarIsCollapsed"
                         :class="sidebarIsCollapsed ? 'mt-4' : 'border-t border-secondary-500 pt-6'"
                         @click="ui.closeMobileSidebar()"