A test pins a spawned forge's first-login card: three next steps, each a link its admin reaches #6829

VISION §4: first login shows three next steps — make your everyday account, open your apps, tell the crew something. src/web/pages/next-steps.ts draws the card and no test imports it.

Done, in test/next-steps-card.test.ts:

• [ ] On a spawned forge's first admin login, the home carries the card with exactly those three steps, in that order.
• [ ] Each step's link answers 200 for that admin (not 404, not a redirect loop).
• [ ] Once the everyday account exists, that step reads done (or leaves), as core/next-steps.ts says.
• [ ] A guest and a second account never see the card.

Files: test/next-steps-card.test.ts; src/web/pages/next-steps.ts only if a link is dead. Suggested: scout.