While a blur overlay (a modal dialog or the lock screen) covers the
window, the theme backdrop effects kept requesting animation frames
even though they are not visible, so the app never went idle and
re-rendered continuously.
The ambient animation predicate now drops the backdrop-effects term
when a blur overlay was active last frame. Reduce Motion and the
unfocused/hidden throttle were already handled, and the overlay's own
moving elements (the lock screen's unlock dots, a spinner) still request
frames through the progress term, so nothing on screen freezes.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
DanSandClaude Opus 4.8
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