Add music platform with DGDN album player

- Create /music landing page with artist grid
- Add /music/Darnea artist page with album listing
- Build /music/Darnea/DGDN album player with clickable tracklist
- Auto-play next track on completion
- Dangrubb-branded styling with cyan accent colors
- FLAC player pulls from /src/audio/DGDN
- Move landing page links to bottom with yellow announcement box

index.html

@@ -238,13 +238,19 @@
 <p>
   dangrubb.net
 </p>
-<p>
+
+<div class="announcement">
+  <a href="https://dangrubb.net/music">EXCLUSIVE: Leaked mixtape from Darnea's vault</a>
+</div>
+
+<div class="links-bottom">
   <a target="_parent" href="https://ai.dangrubb.net">ai</a>
   <a target="_parent" href="https://dangrubb.net/blog">blog</a>
   <a target="_parent" href="https://pi.dangrubb.net/jellyfin">media</a>
   <a target="_parent" href="https://pi.dangrubb.net/nextcloud">storage</a>
   <a target="_parent" href="https://dangrubb.net/cv">cv</a>
-  <a target="_parent" href="https://pi.dangrubb.net/dangit">git</a></p>
+  <a target="_parent" href="https://pi.dangrubb.net/dangit">git</a>
+</div>
 <div class="debug">
   <div class="code"></div>
 </div>