Some people find the drifting ambient petals distracting rather than
cozy, so make the whole PetalFall layer opt-out-able from a 🌸 toggle
sitting just left of the sound toggle in the status bar.
Mirrors the existing sound-mute pattern: a tiny localStorage-backed
pub/sub (effects/petals.ts) drives a PetalsToggle twin of SoundToggle.
PetalFall subscribes to the setting, stops animating and wipes the
canvas when off, and the choice persists across reloads. Works in both
day (petals) and night (stars) modes.
Claude-Session: https://claude.ai/code/session_016Yr6jELuRc7hyzYLccQKZd
8be852ddf2