Windows hover card: show sign-in only when signed out, and give the flat notch its own size and room

[RawJat]

Three fixes to the Windows hover card, all visible in 1.16.0, in two commits: the Claude sign-in block, then the flat notch's geometry. Either commit can be dropped on its own.

1. Claude sign-in shows only when Claude is signed out

Follows up a note on #257's merge: the Sign in / Refresh buttons render on the Claude card unconditionally rather than only on needsAuth. Today every Claude hover shows them under a live reading.

• The block now shows only while Claude's status is needsAuth, which is when the Mac's card shows its "Sign in to Claude Code to read your usage" line.
• Only on the default account's card. claude_auth runs the CLI without CLAUDE_CONFIG_DIR, so the button always signs in ~/.claude. On a second account's card (windows: read every Claude account, not just ~/.claude #279) it would sign in a different profile from the one the card shows.
• Refresh goes. It asked refresh_provider for Claude, which a click on the ring and the menu's Refresh now already do, so refresh_claude_usage and the three Russian strings only it used go too.
• A background token renewal no longer shows as a disabled "Signing in…" on a signed-in card, since the block isn't drawn there. That was Windows: sign in to Claude directly from the usage card #257's other note.

The sign-in flow itself is unchanged.

2. A flat notch is drawn at its own size, and its card is placed right

#282 widened the top/bottom window from 520 to 650 px so a sixth ring would fit. The page keeps that width as DESIGN_W_FLAT for fitZoom, which reads a viewport wider than the design as a DPI disagreement, so the whole notch has been zoomed by 650/520 on the flat edges: a quarter larger than upright, and a size above what Size asks for.

The card came off worse. placeCard measures with getBoundingClientRect, which returns zoomed values, and writes styles, which are not, so its 30 px gap above the pill lands about 75 px low at 150 % — over the rings on a bottom notch, and on a notch lifted clear of the taskbar it reads as the card alone having missed it.

The page takes the window's width again. A test now reads both constants out of notch.html and compares them with notch_window_size, because nothing in the build reads the page.

3. The flat card gets the room the upright one has

Lying flat, the card opens above or below the pill rather than beside it, so max-height: calc(100% - 150px) leaves it the window less the pill's depth, the 30 px gap and the margins. The flat window was 520 tall against the upright window's 650, which left the card 370 px; a stale Antigravity card with two model groups measures 400, so it scrolled.

The flat window is square now, 650 on both sides, leaving the card 500 px — about what it had before the settings orb raised the upright window. NOTCH_H had no other reader, so it and NOTCH_UPRIGHT_H are one constant, NOTCH_LONG. The test asks for the room rather than the number.

Tests

• cargo test (126, including the new guard, which fails on the old 520) and cargo clippy --all-targets (6 warnings, all pre-existing)
• node scripts/test-claude-auth-ui.cjs, which now also covers when the sign-in block shows, and node scripts/check-ui-scripts.mjs
• Live at 150 %, signed in: the Claude card shows no buttons
• Live at 150 %: a bottom notch draws at the Size chosen, its card sits clear above the pill, and Antigravity's card does not scroll

Refs #257, #282

[vinzdg]

Merged as 1f30e2f. Thanks @RawJat.

I checked it against the three notch PRs of yours that landed on Thursday, since this touches the same area: notch_window_size still branches on edge, the carry and fold logic is untouched, and the 44px ring in a six-ring flat window survives. a_flat_notch_is_wide_enough_for_six_rings keeps its width assertion and swaps the height one for h - 150.0 >= 400.0, which is honest — it mirrors the max-height:calc(100% - 150px) on the card, and 650×650 satisfies it with room. The new the_pages_design_widths_are_the_window_widths test closing the fitZoom foot-gun is a good addition.

Showing sign-in only when signed out is the right call; it was rendering unconditionally on the Claude card since #257.