feature: global view animation

- Updated Header component to adjust title margin and changed subtitle from h3 to h2 for better semantic structure.
- Refined LanguageSwitcher component to enhance language switching functionality and improved accessibility.
- Adjusted Navigation component's margin and link styles for better visual hierarchy.
- Enhanced ThemeToggle component with view transition effects for smoother theme changes.
- Updated global CSS to support new transition styles for theme toggling.
- Bumped rollup version in pnpm-lock.yaml for improved build performance.

src/layouts/Head.astro

@@ -1,5 +1,6 @@
 ---
 import themeConfig from '@/config'
+import { ClientRouter } from 'astro:transitions'
 
 interface Props {
   postTitle?: string
@@ -35,6 +36,7 @@ const { cdn, commentURL = '', imageHostURL = '', customGoogleAnalyticsURL = '',
 <meta itemprop="name" content={postTitle || title} />
 <meta itemprop="image" content={postImage || siteScreenshot} />
 <meta itemprop="description" content={postDescription || subtitle} />
+<ClientRouter />
 
 <!-- Preload -->
 <link rel="preconnect" href={cdn} />