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/Sound/EnemyCombat/unity_assets.json

@@ -0,0 +1,57 @@
+{
+  "status": "pass",
+  "bank": "Assets/Bundles/Effects/EnemyCombat/EnemyCombatPresentation.prefab",
+  "effects": 8,
+  "poolInstances": 32,
+  "voices": 8,
+  "clips": [
+    {
+      "name": "Enemy_HornletAttack",
+      "length": 0.48,
+      "frequency": 44100,
+      "channels": 2
+    },
+    {
+      "name": "Enemy_DashletAttack",
+      "length": 0.42,
+      "frequency": 44100,
+      "channels": 2
+    },
+    {
+      "name": "Enemy_ShellhornAttack",
+      "length": 0.6,
+      "frequency": 44100,
+      "channels": 2
+    },
+    {
+      "name": "Enemy_HornCaptainAttack",
+      "length": 0.58,
+      "frequency": 44100,
+      "channels": 2
+    },
+    {
+      "name": "Enemy_GreatHornAttack",
+      "length": 0.82,
+      "frequency": 44100,
+      "channels": 2
+    },
+    {
+      "name": "Enemy_HitSoft",
+      "length": 0.34,
+      "frequency": 44100,
+      "channels": 2
+    },
+    {
+      "name": "Enemy_HitArmor",
+      "length": 0.42,
+      "frequency": 44100,
+      "channels": 2
+    },
+    {
+      "name": "Enemy_HitShield",
+      "length": 0.55,
+      "frequency": 44100,
+      "channels": 2
+    }
+  ]
+}