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/Design/G3/editor_frame_sample.json

@@ -0,0 +1,12 @@
+{
+  "device": "Unity Editor Windows 11  (10.0.22631) 64bit / NVIDIA GeForce RTX 3060",
+  "quality": "流畅",
+  "note": "Editor sample only. Does not satisfy the WeChat 30 FPS target.",
+  "frames": 90,
+  "averageFps": 55.3,
+  "minFrameMs": 15.51,
+  "maxFrameMs": 143.68,
+  "heroes": 2,
+  "enemies": 1,
+  "advice": "1-1 · 营地初守\n岩团团前排、火喵后排，先熟悉防线\n本次未获得通关奖励\n建议：可调整前后排后免费重试"
+}