Merge pull request #570 from wucm667/fix/sidebar-logo-load-flicker

fix: 修复侧边栏 Logo 加载时的闪烁问题

frontend/src/components/layout/AppSidebar.vue

@@ -10,7 +10,7 @@
     <div class="sidebar-header">
       <!-- Custom Logo or Default Logo -->
       <div class="flex h-9 w-9 items-center justify-center overflow-hidden rounded-xl shadow-glow">
-        <img :src="siteLogo || '/logo.png'" alt="Logo" class="h-full w-full object-contain" />
+        <img v-if="settingsLoaded" :src="siteLogo || '/logo.png'" alt="Logo" class="h-full w-full object-contain" />
       </div>
       <transition name="fade">
         <div v-if="!sidebarCollapsed" class="flex flex-col">
@@ -167,6 +167,7 @@ const isDark = ref(document.documentElement.classList.contains('dark'))
 const siteName = computed(() => appStore.siteName)
 const siteLogo = computed(() => appStore.siteLogo)
 const siteVersion = computed(() => appStore.siteVersion)
+const settingsLoaded = computed(() => appStore.publicSettingsLoaded)
 
 // SVG Icon Components
 const DashboardIcon = {