Clients could toggle fog visibility (and fade alpha); DisplayData synced
that to everyone and defeated FoW. Block client set_visible/set_alpha,
clamp host-side DisplayData updates, and ignore eye toggles for fog.
Co-authored-by: Cursor <cursoragent@cursor.com>
Generate a win-ci Conan host profile from the runner-detected MSVC
version instead of pinning 194 (VS 17), which is missing on current
GitHub-hosted images.