v1.4.0

NovaSkin Export 1.4.0

Animated export:
- Full quality bakes a per-frame UV light atlas per character -> the 2nd layer
  (hat/jacket/sleeves/pants) is lit correctly per-face; draft stays a fast screen-space
  light at half resolution / half fps.
- Optional layers export as toggleable depth-composited MESHES (a held sword, glass),
  each with a baked base texture (albedo + alpha -- captures material colour mods and
  transparency), re-skinnable in the browser.
- One composite.webm (bg/light/occ bands, single decoder) + view_lut.png.
- Fixed a mesh-vs-video one-frame desync on autoplay.