Merge pull request '更换到Astro' (#9) from switch-to-astro into master

Reviewed-on: #9
 -- [CST 2026-06-19 Friday 13:28:19]

js/random.js

@@ -0,0 +1,22 @@
+function randomPost() {
+    fetch('/api/posts.json')
+        .then(res => {
+            if (!res.ok) throw new Error(`Failed to load posts: ${res.status}`);
+            return res.json();
+        })
+        .then(posts => {
+            const postLinks = posts
+                .map(post => post && post.href)
+                .filter(href => typeof href === 'string' && href.startsWith('/posts/'));
+
+            if (postLinks.length === 0) {
+                console.warn('No posts available for random navigation.');
+                return;
+            }
+
+            location.href = postLinks[Math.floor(Math.random() * postLinks.length)];
+        })
+        .catch(error => {
+            console.error('Random post navigation failed:', error);
+        });
+}