The terminal's answers screen tells the crew more about the same app with `t`, without going back to the palette #7416

Intent: the owner reads what the crew said back and answers it in the same place.

Today src/tui/screens/answers.ts is read-only: enter opens the tell on the web and r reads again.

Done:

• [ ] t pushes the existing tell screen (src/tui/screens/tell.ts) for this app's repository. When the cursor is on a tell, its page goes in as the tell's page, so the new tell says where it came from as a toolbar tell does.
• [ ] Sending it adds the new tell to the list, and coming back to the answers screen reads again so it shows.
• [ ] The gate stays the screen's own (canSeeAnswers). The tell's own rules (mayDirectCrew, an unverified email) answer in the tell screen's words, unchanged.
• [ ] The key hints add t tell.
• [ ] A test (e.g. test/tui-answers-tell.test.ts) drives t on a row, sends words and checks a new issue carries them and the row's page.

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