Replace Spotify iframe with custom centered player (layout A); v1.1.5

- EpisodeAudioPlayer full variant: centered title, large gold play button,
  skip-back 15s / skip-forward 30s flanking controls, full-width scrubber
- Compact variant (study sections) unchanged
- Episode detail page fetches direct Anchor MP3 URL from /api/episodes by
  title match; falls back to resolvedEmbedUrl while loading
- Plays stream from Anchor CDN so stats still count

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

package.json

@@ -1,7 +1,7 @@
 {
   "name": "siteforge",
   "private": true,
-  "version": "1.1.4",
+  "version": "1.1.5",
   "type": "module",
   "scripts": {
     "dev": "vite",