71 upstream commits: the repo-wide comment rewrite, the hover highlight as the
scene ambient, M2 Mod/Mod2x batches drawing the bare texel, test and contribution
changes. Conflicts were comment-vs-code in 36 files; where upstream changed only
comments our code was kept, and wow_model.wgsl carries both our lighting lanes
and upstream's new unlit/Mod/Mod2x paths.
Follow-ups folded in:
- our nine Advanced Graphics / water / fog options tests take upstream's
wow_data_or_skip! guard
- PostUpdate ambiguity ceiling re-measured under upstream's new census: 466,
with the per-family breakdown in the comment
- LIGHTING.md: new upstream base
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
