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Feed switch: 110/160ms list dip + 160ms tab color ease - #27
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Motion item C3: switching feeds (1-4) or pages now dips the outgoing list through the chrome color (110ms ease-in out, 160ms ease-out back in) while the newly active tab's color eases dim → accent over 160ms and the previous tab eases back, so tab and list read as one transition. The first load of a feed snaps instantly, and HN_REDUCED_MOTION or non-truecolor palettes skip the motion. Generated by Mistral Vibe. Co-Authored-By: Mistral Vibe <vibe@mistral.ai>
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…ver mid-ease (#30) Two teleports remained after #27: (1) the new list popped in at full brightness before the dip faded it, and (2) the active tab's bold/underline snapped instantly while its color eased over 160ms. Now set_stories_for stashes the outgoing list (stories/selection/scroll) and render swaps it in during the 110ms out-phase so the old list fades through the scrim color before the new one fades in; the tab's bold/underline transfer at the ease midpoint (alpha >= 0.5) instead of at frame zero. Generated by Mistral Vibe. Co-authored-by: chris ha <chris.ha@thetradedesk.com> Co-authored-by: Mistral Vibe <vibe@mistral.ai>
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Motion item C3. Switching feeds/pages dips the list through the chrome color (110ms out, 160ms in) while the active tab eases dim→accent over 160ms and the old tab eases back. First load snaps; HN_REDUCED_MOTION and ANSI/mono palettes skip it.