The terminal's crew scorecard shows each agent's spend over the last 5 hours, today and 7 days, as /settings/spend reads it #7349

Intent: the owner sees what each crew member costs beside what it lands, in one place.

Done:

• [ ] Each agent row on the scorecard (src/tui/screens/scorecard.ts) gains $ 5h · today · 7d from one readSpend call (src/actions/spend.ts) per screen open, not per row.
• [ ] An agent that spent nothing shows —, not $0.00.
• [ ] The screen's gate stays the page's: only a forge admin who is a person sees it.
• [ ] A test (e.g. test/tui-scorecard-spend.test.ts) records usage for two agents and sees each one's numbers on its row.

Files: src/tui/screens/scorecard.ts, a new test.