fix : set app title to Lesstime and remove title switch

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

frontend/components/ui/AppTopNav.vue

@@ -10,15 +10,7 @@
         @click="ui.openMobileSidebar()"
       />
       <div class="hidden items-center gap-2 lg:flex">
-        <h1 class="text-lg font-bold tracking-tight">{{ appTitle }}</h1>
-        <MalioButtonIcon
-          icon="mdi:swap-horizontal"
-          :aria-label="appTitle === 'NeauTime' ? 'Switch to Lesstime' : 'Switch to NeauTime'"
-          variant="ghost"
-          icon-size="18"
-          button-class="text-white/60 hover:bg-primary-600 hover:text-white"
-          @click="toggleTitle"
-        />
+        <h1 class="text-lg font-bold tracking-tight">Lesstime</h1>
       </div>
       <div class="ml-auto flex items-center gap-4 text-xl text-white sm:gap-8">
         <MalioButtonIcon
@@ -66,13 +58,6 @@ defineProps<{
 const auth = useAuthStore()
 const ui = useUiStore()
 
-const appTitle = ref(localStorage.getItem('appTitle') || 'NeauTime')
-
-function toggleTitle() {
-  appTitle.value = appTitle.value === 'NeauTime' ? 'Lesstime' : 'NeauTime'
-  localStorage.setItem('appTitle', appTitle.value)
-}
-
 async function handleLogout() {
   await auth.logout()
   await navigateTo('/login')