Add AIServer, character art pipeline, and Art package boot integration.

Bring in MaleExplorer assets/shaders, model tooling and Hunyuan updates, plus boot/YooAsset Art package support.

Co-authored-by: Cursor <cursoragent@cursor.com>

Tools/hunyuan_3d/errors.py

@@ -0,0 +1,14 @@
+"""混元 3D 流程异常：触发交互式重新登录 / 换号。"""
+from __future__ import annotations
+
+
+class HunyuanReloginNeeded(PermissionError):
+    """凭证失效或未登录，需要打开登录页重新微信扫码。"""
+
+    reason = "auth"
+
+
+class HunyuanQuotaExceeded(HunyuanReloginNeeded):
+    """当前账号额度/次数用尽，需要换号登录后再生成。"""
+
+    reason = "quota"