Make blink mode's speed adjustable and add an optional crossfade#55
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Blink mode alternated the baseline and current capture on a fixed 650ms hard cut. This makes the dwell time adjustable — a speed slider, or `[` / `]` to slow down / speed up — and adds an optional crossfade (`f`, or the Fade button) that eases between the two images instead of swapping instantly, which can make a small shift easier to catch. The dwell time and fade preference both persist across slugs and reloads. The keyboard-shortcuts overlay and the in-view hint bar document the new keys. Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>
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What this does
Blink mode alternated the baseline and current capture on a fixed 650ms hard cut, with no way to change it. This adds live controls:
[/]to slow down / speed up, with a livemsreadout.for a Fade button eases between the two images instead of swapping instantly, which can make a small shift easier to catch than an abrupt cut. The fade duration auto-scales to half the dwell (capped at 400ms) so each image still fully resolves before the next swap.The keyboard-shortcuts overlay and the in-view hint bar document the new keys (
spaceplay/pause,[/]speed,ffade).Implementation notes
The layer toggle moved from
visibilitytoopacityso the crossfade has something to animate; the transition is set inline (tied to the dwell) with.blink-layerjust establishing opacity as the animated property.Test plan
npm run lint— cleannpm test— 111 pass (no behavior here is unit-testable; it's report UI)]steps the dwell (650 → 700ms),ftoggles the crossfade, preferences persist, and there are no console errors.🤖 Generated with Claude Code