S-02: Confirmed drift-3 is used by auth/AmbientBackground — not dead code.
S-03: Extracted noise SVG data URI to module-level NOISE_SVG constant.
S-04: Added will-change: transform to drift orbs for GPU layer promotion.
S-05: Documented the 9 AM snooze default in getMinutesUntilTomorrowMorning.
S-06: Made calendar toolbar bg-card/95 with backdrop-blur-md for better
readability over the transparent FullCalendar grid.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>