iPhone: the grid's three phases against the main fuse (WP16)

[frahlg]

WP16 of the polish plan, step 3 of 3, and decision 6. On 14 October 2026 Fredrik asked for "faser l1 l2 l3": the grid's three phases, live, against his main fuse.

What changes

• The grid node view gains one row under the range line, in the place the battery has its mode and the car its row: FASER · SÄKRING 20 A, then L1, L2 and L3, each as its current in mono over a 10-cell meter, a cell for each tenth of the fuse. The phase nearest the fuse wears the inverse tag. The row is GridPhasesRow in its own file; NodeView.swift gains one branch.
• The values are the box's new extra fields 11–14 (protocol/registry.yaml, copied byte for byte from feat(contract): the grid's phase currents and the main fuse as extra fields ftw-webapp#86, sent by feat(appproto): stream the grid's phase currents and the main fuse ftw#1629). Contract.FID gains gridL1DA, gridL2DA, gridL3DA and gridFuseDA; ContractTests reads them back from the registry.
• When the box sends no phase, there is no row: no three idle meters, and no fuse on its own. A one-phase site gets one meter. While the phases are not live (the cache, a quiet stream, a stale meter), the row keeps its room and shows dashes and empty cells: an old phase current says nothing about the fuse now, and the page does not jump when the stream comes back. The phases follow the site meter's own freshness, the same freshness(fid:) the hero uses.
• Sizes, not directions. The breaker trips on the current's size whichever way it flows, so the meters draw the size. The wire is signed, but a meter that gives only sizes sends them positive both ways, so the app cannot honestly say "buying" from a positive phase. The row says no direction for now.
• The live ring leaves out the phases and the fuse (LiveTrace.untraced): no trace draws them, and keeping them pushed the sealed ring past its 20 KB test.
• The demo box sends phases under a 20 A fuse: its inverter and car spread over all three, its house leans on L1.

The logic is GridPhases in FTWKit (State/GridPhases.swift), with GridPhasesTests. Words in Swedish and English; everySentenceHasSwedish reads both new files.

The look, against the Phosphor rules

• Light means live: lit cells glow in grid magenta only while the phases are live; otherwise ink, dashes and empty cells.
• Two of the six TUI details reach a new place, each with its reading: the 10-cell meter carries a phase's current in tenths of the fuse; the inverse tag marks the phase nearest the fuse. No seventh detail.
• The currents are in mono, as the brief asked: small instrument readings beside a meter, like axis labels, not figures. The hero stays SF Pro.

The demo house is in balance, so the grid reads 0 W while L1 buys and L3 sells about 1.2 A each: the case where the phases tell you what the total hides. At the largest accessibility size the page scrolls, as every node page does, and the meters stack.

Not done yet

• A recording from Fredrik's iPhone against the home box, and an Animation Hitches run. Both need feat(appproto): stream the grid's phase currents and the main fuse ftw#1629 running on the box, which needs Fredrik's yes. Until then the home box sends no phase and the row stays away.
• A compact three-bar mark on Now's grid node. Now is WP8/WP9's, and other sessions are working there; this leaves Now alone.
• No change to launch, so no LaunchClock numbers.

Paired pull requests. All three carry the same registry, byte for byte.

• srcfl/ftw-webapp: feat(contract): the grid's phase currents and the main fuse as extra fields ftw-webapp#86, the source copy.
• srcfl/ftw: feat(appproto): stream the grid's phase currents and the main fuse ftw#1629, which sends the fields on lane 0 and to FTW Cloud.

This repository's CI does not compare its copy with the other two, so I compared them by hand. This one can merge on its own: with an older box the row never shows.

Tests

cd appleApp/FTWKit && swift test     FTWShared 181 passed, FTWKit 349 passed (60 suites)
  new: GridPhasesTests (7), ContractTests.extraFieldIDsAreTheRegistrys
xcodebuild -scheme FTW, iOS Simulator (17 Pro Max, iOS 26.5)    BUILD SUCCEEDED
cmp protocol/registry.yaml against the ftw-webapp and ftw branches    identical

🤖 Generated with Claude Code

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Codex Review Summary

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Review	Status	Commit	Review trigger
📝 Code Review	✅ Completed 2026-10-14T16:49:58.933550Z	0dd48fb	PR opened

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