fix(portal) : allow admin+client users to access both views and add admin link

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

frontend/layouts/portal.vue

@@ -32,6 +32,15 @@
                         class="border-t border-secondary-500 pt-6"
                         @click="ui.closeMobileSidebar()"
                     />
+                    <SidebarLink
+                        v-if="isAdmin"
+                        to="/"
+                        icon="mdi:shield-crown-outline"
+                        label="Administration"
+                        :collapsed="false"
+                        class="mt-2"
+                        @click="ui.closeMobileSidebar()"
+                    />
                 </nav>
 
                 <div class="flex flex-col gap-2 items-center p-4">
@@ -58,6 +67,8 @@ const ui = useUiStore()
 const route = useRoute()
 const { version } = useAppVersion()
 
+const isAdmin = computed(() => auth.user?.roles?.includes('ROLE_ADMIN') ?? false)
+
 // Close mobile sidebar on route change
 watch(() => route.path, () => {
     ui.closeMobileSidebar()