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>

Config/Art/Companions/SparkBird.json

@@ -0,0 +1,75 @@
+{
+  "schemaVersion": 1,
+  "id": "SparkBird",
+  "kind": "Animal",
+  "usage": "companion_visual",
+  "profile": "avian_grounded",
+  "boneMappingReady": true,
+  "height": 0.45,
+  "maxTriangles": 2000,
+  "assetRoot": "Assets/Bundles/Characters/Animal/SparkBird",
+  "staticPrefab": "Assets/Bundles/Characters/Animal/SparkBird/SparkBird.prefab",
+  "approvedMesh": "AIClient/Assets/Bundles/Characters/Animal/SparkBird/SparkBird.fbx",
+  "rigSource": "Tools/output/sparkbird_dgx/high_rig/rigged.glb",
+  "lowUp": "Y",
+  "skinOverrides": [],
+  "outputDir": "Tools/output/companions/SparkBird",
+  "visualPrefab": "Assets/Bundles/Characters/Animal/SparkBird/SparkBird_Companion.prefab",
+  "reviewScene": "Assets/Bundles/Scenes/Review/Companion_SparkBird_Review.unity",
+  "reviewOriginX": 80,
+  "rootBone": "bone_0",
+  "chestBone": "bone_3",
+  "faceRight": "bone_22",
+  "faceLeft": "bone_26",
+  "rightFoot": "bone_22",
+  "leftFoot": "bone_26",
+  "rightFootTip": "bone_23",
+  "leftFootTip": "bone_27",
+  "rightArm": "bone_7",
+  "leftArm": "bone_14",
+  "walkStride": 0.045,
+  "walkLift": 0.012,
+  "walkSeconds": 0.9,
+  "walkBindCalibration": true,
+  "walkSourceWeight": 0.25,
+  "idleSeconds": 1.4,
+  "idleBreath": 0.002,
+  "idleSourceWeight": 0.06,
+  "attackStyle": "wing_cast",
+  "attackEvent": "OnCompanionAttackImpact",
+  "attackSeconds": 1.0,
+  "attackSourceWeight": 0.1,
+  "attackWindup": 0.25,
+  "attackImpact": 0.45,
+  "attackRecover": 0.88,
+  "attackLeanDegrees": 4,
+  "attackArmDegrees": 35,
+  "attackLunge": 0.002,
+  "attackReach": 0.015,
+  "maxRootTilt": 25,
+  "groundTolerance": 0.003,
+  "motions": [
+    {
+      "name": "Idle",
+      "sourceDir": "Tools/output/companions/SparkBird/motions/Idle",
+      "prompt": "a small upright bipedal sparrow stands on two feet with gentle breathing and subtle wing settling",
+      "duration": 2.0
+    },
+    {
+      "name": "Walk",
+      "sourceDir": "Tools/output/companions/SparkBird/motions/Walk",
+      "prompt": "a small upright bipedal sparrow walks on the ground with alternating short steps, keeping its wings near its sides",
+      "duration": 2.0
+    },
+    {
+      "name": "Attack",
+      "sourceDir": "Tools/output/companions/SparkBird/motions/Attack",
+      "prompt": "a small upright bipedal sparrow briefly draws both wings back, sweeps them forward once to cast a lightning spell, and recovers to standing",
+      "duration": 2.0
+    }
+  ],
+  "anatomyNotes": "Inspected this SparkBird TokenRig original: 28 bones. Root0 vertical pelvis, chest3; x-positive wing7 with feather chain8..12, x-negative wing14 with feather chain15..19; x-positive ankle22/toe23 and x-negative ankle26/toe27. Head4/5 carries crest. Tail has no independent bone; inspect its weighting under the strongest wing cast. Grounded bird, not a flying locomotion adapter.",
+  "rightWingTip": "bone_12",
+  "leftWingTip": "bone_19",
+  "wingSpreadDegrees": 25
+}