After the first ask the new forge says who took it and what they are doing, or exactly what is missing #11343

Replaces part of #11278. Today the home shows "Received." then "nobody is on it yet" forever.

Done:

• [ ] After the first ask, the next-steps card (src/web/pages/next-steps.ts) shows the new app and its issue with one of: the builder's name and run state ("mason is building it"), or the one thing missing, in plain words with its action ("No AI account and no included credit left: add a key"), or "Waiting for a builder slot" with the queue position.
• [ ] Never "Received." followed by nothing: the flash names the app and the issue.
• [ ] A test for each of the three states, each failing on today's main.

One page module, its words, and one test file.