Add formal enemies, remaining formal partners and synthesized UI SFX

- UI SFX v3: procedurally synthesized one-shots (Tools/synth_ui_sfx.py) wired to
  buttons, rewards, errors and red dots via UiSfx, gated by the SFX setting.
- Five formal enemies (Hornlet, Dashlet, Shellhorn, HornCaptain, GreatHorn):
  Hunyuan 50k -> 2000-tri XPbr, DGXA TokenRig, Idle/Walk/Attack, nested per type
  in PrototypeArena; PrototypeBattle.Enemy gains presentation-only Moving/Strikes.
- Formal partners for all ten pets in the arena and portraits, including new
  VineSprite, ThunderLeopard and TideWhale.
- Pipeline fixes: reject local TokenRig fallback, drop loose mesh islands,
  configurable Unity run_script timeout, companion static stage.
- Also includes concurrent work from another tool in this working tree
  (FlameLion, enemy combat FX, challenge mode, home explorer, server updates).
- Resources registered in Doc/ResDesc_*.md; verified on isolated :18081.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

Doc/ResDesc.md

@@ -14,3 +14,7 @@
 | config | [ResDesc_Config.md](./ResDesc_Config.md) | 玩法规则、数值与关卡配置 |
 
 新增资源类型时：在本表增加一行，并新建对应 `Doc/ResDesc_<Type>.md`。
+
+| `BudBud` 伙伴模型、动作和配方 | `AIClient/Assets/Bundles/Characters/Animal/BudBud/`、`Tools/output/companions/BudBud/`、`Config/Art/Companions/BudBud.json` | Blender 离线制作的芽芽 T1；模型 1804 tris、8骨同源 Idle/Walk/Attack，Unity 导入入口已准备，Editor 验收待连接。 |
+
+敌人攻击／受击特效与TangoFlux音效已制作并接入现有战场，登记见 [ResDesc_Effect.md](ResDesc_Effect.md) 和 [ResDesc_Sound.md](ResDesc_Sound.md)；标准制作与验收入口见 [EnemyCombatFx/Production.md](Design/Combat/EnemyCombatFx/Production.md)。