Add dynamic blog preview to homepage

- Create blog/posts.json for managing blog post metadata
- Add blog preview box (max 1/3 screen width) to homepage
- Fetch latest post dynamically with image and excerpt
- Updates automatically when new posts added to JSON
- Styled to fit no-scroll homepage layout
- Link to full blog page for each post

index.html

@@ -243,6 +243,12 @@
   <a href="https://dangrubb.net/music">EXCLUSIVE: Leaked mixtape from Darnea's vault</a>
 </p>
 
+<div class="blog-preview-container">
+  <div class="blog-preview" id="latestBlogPreview">
+    <p style="color: #9d9aa4;">Loading latest post...</p>
+  </div>
+</div>
+
 <div class="debug">
   <div class="code"></div>
 </div>