Append a rotation-only view-projection plus the eye split into high/low
f32 (double-single) to the shared Uniforms buffer, and the matching
Camera helpers (view_proj_rte, eye_high_low). Fields are added at the end
so existing field offsets — and every shader still reading only the
legacy view_proj — are unaffected. No shader consumes them yet; the wire
pipeline migrates first in the next step.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>