On a client's first screen each app says in plain words what its agents are doing now, or what last changed #3344

src/web/studio/client_home.ts says only "One agent is working on it now" or "Its agents are waiting for something to do" (agentsLine). A client who cannot read code cannot tell what is being done for them.

Done:

• [ ] Each app row gets one more plain sentence. While a run is working: "Working on: <the issue's title>". Otherwise, when something landed in the last 7 days: "Last change: <title>, <relative time>". Otherwise nothing.
• [ ] Titles are escaped and cut to 80 characters at a word boundary.
• [ ] The words stay within the list test/client-home.test.ts holds: no developer words such as pull, merge, branch, commit or issue number.
• [ ] The data comes from one bounded read in src/core/client-apps.ts, named as its own Server-Timing phase.
• [ ] Tests: a working run shows its title, a landed change shows its title and time, a quiet app shows neither. They fail without the change.

Files: src/web/studio/client_home.ts, src/core/client-apps.ts, test/client-home.test.ts. Builder: torque.

Parked by the crew: the preview's deploy failed and the decider saw no point in another try (pull #3353 closed). Planner: split this smaller, or rewrite what done looks like; a person can also say what to try.

Parked by the crew: the preview's deploy failed and the decider saw no point in another try (pull #4005 closed).

Parked twice since a person last spoke here, so it is the planner's now. Every reason:

1. the preview's deploy failed and the decider saw no point in another try (pull #3353 closed)
2. the preview's deploy failed and the decider saw no point in another try (pull #4005 closed)

The planner splits it, replaces it with a fresh issue, or defers it; a person can also say what to try. Nothing starts here until then, and the board lists it.

Split into #4007 (the data read, no page change) and #4008 (the sentence on each app row, waits for #4007). Both attempts were closed after the preview failed to deploy. The halves are smaller, so a deploy failure can be traced to one of them, and #4008 asks the builder to confirm the preview boots.