Alexander Whitestone 319ea08b24 perf: Three.js LOD and texture audit for local hardware (#873) ...

- Add performance-monitor.js: stats.js overlay with FPS, frame time,
  draw calls, and agent LOD stats. Toggle with Shift+P.
- Add lod-system-enhanced.js: THREE.LOD integration with tier-based
  mesh simplification (high/mid/low PBR materials), billboard sprites,
  frustum culling, and automatic performance tier detection.
- Add texture-optimizer.js: WebP conversion, texture size limits by
  tier, mipmap control, memory budget tracking, and scene audit.
- Add performance-benchmark.js: automated 10s benchmark with report
  generation and hardware requirement validation.
- Add docs/MINIMUM_SOVEREIGN_HARDWARE.md: performance tiers, draw call
  budgets, and M1 Mac baseline requirements.
- Update app.js: integrate PerformanceMonitor.update in game loop,
  pass renderer to LODSystem.init().
- Update index.html: include new performance scripts.

Acceptance criteria:
✓ LOD for complex agent models (4 levels: high/mid/low/sprite)
✓ Texture audit utilities with compression recommendations
✓ Performance overlay showing frame times and draw calls
✓ Minimum sovereign hardware documentation

Closes #873

2026-04-25 21:29:50 -04:00

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