Client-only, procedural, zero netcode — a sibling of AmbientMotionSystem,
biome-keyed + camera-following. Three cosmetic beats: fleeing critters (ground
bugs + a few birds that dart out of the flee radius = the scatter beat,
biome-tinted, recycled at the ring edge), drifting cloud-shadow discs, and
Blight-room-only double-blink directional lightning flash + delayed thunder
(dedicated flash light -> no RenderSettings fight with WorldAtmosphereSystem).
Reuses the FeedbackFx disc/scorch primitives + procedural SFX. Live knobs in
AmbientLifeConfig. 474/474 EditMode; live-verified at base (flee confirmed).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
