CR: Waybar CSS Performance — Rollback

Rollback Plan

# Revert via git (waybar config is in dots-quantum or similar)
git -C ~/.config/waybar checkout style.css config

# Or restore from git history
git -C ~/.config/waybar log --oneline -5
git -C ~/.config/waybar checkout <commit-hash> -- style.css config

# Restart waybar
kill $(pgrep -x waybar) 2>/dev/null && waybar &disown 2>/dev/null

Reverting will reintroduce the box-shadow + animation CPU rendering loop. Only revert if you have also addressed the GTK3 performance issue (e.g., by switching to a GPU-accelerated renderer or replacing box-shadow with border effects).