- Add runtime sprite loading from Characters.png and Environment.png
- Implement ProcessTransparency for chroma-key white background removal
- Add AgentAnimator for procedural idle/movement animations
- Add Billboard component support for 2.5D perspective
- Normalize sprite scales based on world units
- Fix SetMovement parameter mismatch
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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>