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/Character/FlameLion/design_prompt.txt

@@ -0,0 +1,18 @@
+Mode: built-in image_gen (generate; stylized-concept)
+Date: 2026-10-21
+Output: Doc/Design/Character/FlameLion/flamelion.png
+References:
+- AIClient/Assets/Bundles/UI/Texture/Prototype/proto_pet_6.png (identity/proportions)
+- Doc/Design/Character/FireCat/firecat.png (style)
+
+Final prompt:
+Use case: stylized-concept.
+Asset type: production concept for AIGame Unity mobile game T1 companion FlameLion / 烈焰狮, ID 6.
+Input images: Image 1 is the EXISTING identity/proportion reference, a cute upright small lion with golden-orange head, orange-red body, warm rust-orange mane, two small ears and two grounded feet; retain its recognizable lion identity and upright two-legged proportions while replacing primitive proxy geometry. Image 2 is STYLE ONLY: match the existing FireCat companion's polished friendly chibi 3D game render, large expressive glossy eyes, rounded body volumes, soft lighting and clean readable surfaces. The new animal must clearly be a male lion with rounded lion ears, broad muzzle and mane, not a duplicate kitten.
+Subject: one adorable stout baby male lion, oversized round golden-orange face framed by a thick warm reddish-orange sculpted mane. The mane forms a compact continuous attached silhouette around the head and neck, with a few broad flame-shaped fur locks, no individual floating flames. Small round lion ears, large friendly amber-brown eyes, broad cream muzzle, small dark rounded nose, gentle closed-mouth smile. Golden-orange torso, cream belly and toe tips, two relaxed short forepaws, two chunky hind feet, one short visible curved lion tail ending in a solid reddish-orange fur tuft. T1 base animal, without clothing or equipment.
+Pose: neutral symmetrical upright BIPED standing pose like the prototype and companion style, both hind feet flat on one common ground plane, clear gap between feet; forepaws slightly away from torso with visible armpit gaps, palms angled inward at rest, long enough for later braced spell casting. Head level and facing the viewer, no attack or large gesture. Mane leaves forepaws and shoulders readable for rigging; tail visible with gap from forearm.
+Composition: single full-body character, centered, portrait 2:3 framing, almost frontal with only a very slight three-quarter angle (no more than 10 degrees); all mane, ears, paws, feet and tail completely in frame, generous white margins.
+Scene/backdrop: pure solid white #FFFFFF to all four corners, soft neutral studio light and only a faint contact shadow immediately under feet.
+Materials: simple stylized soft fur, broad sculpted mane locks, clean gold / orange / rust-orange / cream palette, suitable for 2000-triangle reconstruction with 1024 textures. Match FireCat level of finish while keeping lion identity.
+Constraints: exactly ONE character, TWO grounded hind feet, TWO separate forepaws, ONE tail. No text, watermark, panel, logo, UI, border, base pedestal, scenery, extra characters, weapons, saddle, collar, metal armor, jewelry, magical glow, particles, flames detached from the animal, fire breath, smoke, effects, or an open-mouth attack pose. Flame-themed mane is solid attached fur geometry, not an effect.
+