…to-reset

Battle flow fixes from Cricket QA session:

- BattleSceneCanvas: replace hardcoded preload list (missing giant-spider,
  hook-horror, basilisk) with auto-discovery over MONSTER_TEMPLATES_REDUX
  via the new asGLBDrawFn narrower. Fixes the "old spider refreshes"
  delay where the procedural fallback was shown until the GLB lazily
  loaded mid-battle.
- triggerAttack: splice in-flight same-side attacks before pushing a new
  one (click-to-reset so the player isn't queued behind a stale RAF).
  Pushed out via spliceSameSideAttacks helper for unit testing.
- triggerAttack: monster counterattack now actually animates — looks up
  the monster template via templateRef, calls playClip('attack') for GLB
  creatures, or sets state.monsterAnim for ASCII-only (Ooze, Crawler).
  Cleanup block in RAF loop clears monsterAnim once the duration window
  elapses so the next attack starts from idle.
- MonsterAsciiRenderer: add 'attack' action to AnimAction with a 3-phase
  windup/strike/recover curve. Monsters face LEFT, so windup pulls to
  +X and strike lunges to -X. durationOverride support so ranged/spell
  attacks honor WEAPON_SPEED instead of the 600ms melee default.
- glbCreatureLoader: export GLBDrawFn type + asGLBDrawFn narrower.
  makeGLBDrawFn attaches glbUrl/glbGridW/glbGridH/glbYaw so the preload
  loop can discover GLBs without a hardcoded list. playClip now restarts
  LoopOnce clips when called with the same action (required so rapid
  consecutive attacks replay instead of silently no-op'ing).
- glbItemLoader: fix Three.js warning from `emissive: undefined` — pass
  a black Color when emissiveIntensity is 0.

Tests: +22 new tests across 4 files
- glbCreatureLoader.test.ts (5): asGLBDrawFn duck-typing
- BattleSceneCanvas.test.ts (6): spliceSameSideAttacks semantics
- MonsterAsciiRenderer.test.ts (8): 3-phase attack curve + boundaries
- monsterTemplatesRedux.test.ts (+3): glbUrl contract on every dynamic
  template (guards the "silent preload skip" class of bug)

All 71 tests pass across the 8 touched test files.

Co-Authored-By: Claude Opus 4.6 (1M context) <[email protected]>