Each row on /forges names the next step that forge's person has not taken: claim it, make an everyday account, or tell the crew something #5906

The Link test: the owner should see at a glance who got stuck where.

Done when:

• [ ] Each row on /forges (src/web/pages/forges.ts) ends with the first step not yet taken: not claimed yet, no everyday account yet, no tell yet, or going: last tell <time>. It is read from the child's heartbeat, with new fields added there and validated on receipt the way the others are.
• [ ] A child that has not reported shows has not reported yet, as today.
• [ ] MCP forges gives the same nextStep.
• [ ] Tests: one row in each state, and a beat with a bad value that drops the field, not the beat.