refactor: enhance UI components with improved styling and transitions

- Updated DownloadQueue.vue to use Tailwind CSS for styling and added transition effects for better user experience.
- Refactored InstalledAppsModal.vue to improve layout and responsiveness, incorporating Tailwind CSS styles.
- Enhanced ScreenPreview.vue with transitions and improved button styles for navigation.
- Revamped ThemeToggle.vue to provide a more modern toggle button design with accessibility features.
- Updated TopActions.vue to use Tailwind CSS for buttons and layout adjustments.
- Refined UpdateAppsModal.vue with a cleaner layout, improved button styles, and better handling of loading states.

src/components/TopActions.vue

@@ -1,10 +1,16 @@
 <template>
-  <div class="top-actions">
-    <button class="apm-btn" @click="handleUpdate" title="启动 apm-update-tool">
-      <i class="fas fa-sync-alt"></i> 软件更新
+  <div class="flex flex-wrap gap-3">
+    <button type="button"
+      class="inline-flex items-center gap-2 rounded-2xl bg-gradient-to-r from-brand to-brand-dark px-4 py-2 text-sm font-semibold text-white shadow-lg transition hover:-translate-y-0.5 focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-brand/40"
+      @click="handleUpdate" title="启动 apm-update-tool">
+      <i class="fas fa-sync-alt"></i>
+      <span>软件更新</span>
     </button>
-    <button class="apm-btn" @click="handleList" title="启动 apm-installer --list">
-      <i class="fas fa-download"></i> 应用管理
+    <button type="button"
+      class="inline-flex items-center gap-2 rounded-2xl bg-slate-900/90 px-4 py-2 text-sm font-semibold text-white shadow-lg shadow-slate-900/40 transition hover:-translate-y-0.5 focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-slate-900/40 dark:bg-white/90 dark:text-slate-900"
+      @click="handleList" title="启动 apm-installer --list">
+      <i class="fas fa-download"></i>
+      <span>应用管理</span>
     </button>
   </div>
 </template>
@@ -22,7 +28,3 @@ const handleList = () => {
   emit('list');
 };
 </script>
-
-<style scoped>
-/* 该组件样式已在全局样式中定义 */
-</style>