Color-only (spherical harmonics) work buffer updates for SOG resources now reconstruct geometry from the work buffer's stored world-space transform data instead of re-reading and dequantizing the source SOG textures. This skips the means/quats/scales source fetches (and V2 codebook lookups) on the SH-refresh pass, which fires whenever the camera translates.

Changes:

• Add gsplatWorkBufferGeometry shader chunk (GLSL + WGSL) that decodes the stored center/rotation/scale for both compact and packed work buffer encodings, then converts them back to local space so user modifier code keeps working unchanged.
• Add a work-buffer-geometry path to the gsplatCopyToWorkbuffer shaders and unify the shared color/SH tail across both the full-render and SH-only paths.
• Add a dataFormat layout tag to GSplatFormat (set by GSplatParams) so the decode variant is selected from the format's identity rather than by inspecting stream pixel formats.
• Opt-in per resource via GSplatResourceBase#supportsWorkBufferGeometry, enabled for SOG only; all other formats keep the existing source-read path.

Performance:

• For SOG SH refreshes, replaces 4 source texture fetches + dequantization per fragment (plus V2 codebook lookups) and a per-fragment mat4×mat4 with a single work-buffer fetch and a quaternion rotate. Net ALU reduction with fewer texture fetches on that pass; largest at SH band 3 and when a work buffer modifier is present. No effect on non-SOG formats or on the full-render path.

Behavior notes:

• SH colors for SOG are no longer bit-identical (the view direction is computed in world space via the inverse model rotation rather than from the model-view matrix); differences are visually negligible.
• Inside setWorkBufferModifier code on the SH path, getCenter/getRotation/getScale now return post-modifier values reconstructed from the work buffer, so rotation/scale carry the work buffer format's quantization.