[frahlg]

Problem

Fredrik picked J, steady flow, for Now's ring on 30 October 2026, and the iPhone app draws it since srcfl/ftw-app#132. The webapp still drew the older ring, with a wave along the arc, so the phone and the browser showed the same home in two different ways.

Change

• Lines toward and away from the home. Thin lines of light run between each arc and the home's circle, 15 px apart and faster with more power. They run in toward the home for power coming into it and out for power leaving it. They keep their angle, so they narrow near the home.
• The arc. It no longer carries a wave. It is brightest over its middle third and lights at least a quarter of its quarter (was 0.12).
• A swell per reading. Each new reading from the box (site.lastFrameAtMs, now passed to EnergyRing as readingAt) sends one swell from the arc's middle out past its ends.
• Glow. In the dark, arcs and lines glow in two blurred passes for the whole ring, on two canvases of their own blurred with CSS. Light theme and reduced transparency have no glow, as before.
• Reduced motion. Nothing runs or swells, and a still chevron on the way to the home shows the direction.
• Shared rules. ringStrength, ringEase, ringSwell, ringSwellDuration and ringLines are ported from the app's Flow.swift, with its tests. Light means live is unchanged: only confirmed live readings glow or move.

Paired work, not a dependency: srcfl/ftw-web#37 draws the same ring on ftw.energy.

Evidence

• npm run verify: 1183 tests pass (2 skipped), types clean, build OK.
  • ring-motion.test.ts covers a swell per reading, no swell on the first reading, a quiet arc, a frame drawn at rest or under reduced motion, the swell's path, the lines' spacing and direction, the ease and the strength.
  • EnergyRing.svelte.test.ts now counts the glow on its own layers.
• Reviewed in a browser against the dev simulator, in dark and light themes. Solar's lines run in, while the battery's (charging) and the grid's (selling) run out. No console errors.
• Not checked: frame cost on a low-end phone. The loop runs only while an arc is live and flowing and Now is on screen, as before.

🤖 Generated with Claude Code

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Codex Review Summary

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Review	Status	Commit	Review trigger
📝 Code Review	✅ Completed 2026-10-30T13:15:51.049460Z	62efff7	PR opened

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Status	Name	Latest Commit	Preview URL	Updated (UTC)
✅ Deployment successful! View logs	ftw-webapp	62efff7	Commit Preview URL Branch Preview URL	Oct 30 2026, 01:15 PM