The board's money line: cost, revenue and the gap, per forge and per app, today and this month #510

The signal that says whether the slider is set right.

Acceptance:

• [ ] one line on the board: "This month · cost $359.34 · revenue $412.00 · +$52.66" with the gap in the accent when positive and the warning tint when negative; the slider's position beside it as a link to Settings → Economics
• [x] a server-rendered SVG beside it: 30 days of daily cost and revenue as two lines with the gap shaded between them — no chart library
• [x] per app, on the app page: the same three numbers and its share of owned vs cloud awake time
• [x] the numbers are the same function the statement uses (no second sum); tests prove the board total equals the sum of app statements
• [x] no layout shift: the line's slot is reserved when the numbers are zero

Files: src/web/pages/board.ts, src/web/studio/app.ts, src/core/cost.ts, src/core/revenue.ts.

Part of the profit slider (#392); the shape is docs/PROFIT.md.

Released from Later to use the week's subscription: Under the allowed burn: 36% of the week left with 38% of its time gone, reset 2026-11-15 02:00 UTC, burning 0.2% an hour over the last 6 h against 0.2% allowed; speeding up to 5 of 5 slots and releasing the next issue.

Reviewed pull #10983 at its head: ticked a server-rendered SVG beside it: 30 days of daily cost and revenue as two lines with the gap shaded between them — no chart library; per app, on the app page: the same three numbers and its share of owned vs cloud awake time; the numbers are the same function the statement uses (no second sum); tests prove the board total equals the sum of app statements; no layout shift: the line's slot is reserved when the numbers are zero. left open: one line on the board: "This month · cost $359.34 · revenue $412.00 · +$52.66" with the gap in the accent when positive and the warning tint when negative; the slider's position beside it as a link to Settings → Economics — The line, the warning tint and the slider link are there. The gap is not in the accent when positive, by design: the design system reserves the accent for interaction, and the slider link takes it. The line also wraps to two rows..

Left open after pull #10983 landed: 1 unticked item remains (one line on the board: "This month · cost $359.34 · revenue $412.00 · +$52.66" with the gap in the accent when positive and the warning tint when negative; the slider's position beside it as a link to Settings → Economics). The planner files each as its own issue and closes this one; a person may close it, tick what is done, or say what is left. Until then the crew does not pick it again.

Split: the shipped work stays. Its one open box, the money line on the board, is now #11056.