Remove next-view-transitions and use native View Transition API

- Remove external next-view-transitions dependency
- Use Next.js 16 native navigation and Safari 18+ native View Transition API
- Add ViewTransitionProvider for minimal wrapping with Safari 18+ detection
- Updated all Link imports from external package to next/link
- Removed link-wrapper.tsx and view-transitions-wrapper.tsx

This resolves Safari compatibility issues while maintaining transitions on modern browsers.

app/page.tsx

@@ -1,4 +1,4 @@
-import { Link } from 'next-view-transitions';
+import Link from 'next/link';
 import { getAllPostsSorted } from '@/lib/posts';
 import { siteConfig } from '@/lib/config';
 import { PostListItem } from '@/components/post-list-item';
@@ -51,7 +51,7 @@ export default function HomePage() {
             <Link
               href="/blog"
               prefetch={true}
-              className="text-xs text-blue-600 hover:underline dark:text-blue-400"
+              className="text-xs text-accent hover:underline"
             >
               所有文章 →
             </Link>