feat(posts): publish 60-song full-length YuE2 BF16 tutorial with track navigator & lazy loading

scripts/og-gen/art-meta.json

@@ -293,5 +293,8 @@
   "evidence": "Telephone game distortion · implicit architectural drift",
   "ogTitle_en": "Why Multi-Agent Coding Fails",
   "ogTitle_zh": "多 AI 写代码烂尾与隐式决策困境"
+ },
+ "generating-full-length-songs-with-yue2-comfyui": {
+  "evidence": "60 songs - 9-part structure - 295s headroom cap"
  }
 }