An app's About card in the terminal says how long its golden path took: New app to first preview, and to first production deploy #7488

Intent: the owner sees at a glance how quickly an app went from nothing to live. It is the measure the apps page and the shelf already show, from goldenPathLine (src/apps/golden_path.ts).

Done:

• [ ] On a repository that is an app, the About card (src/tui/screens/about.ts) draws one line from goldenPath and goldenPathLine, the same words as the apps page, e.g. first preview in 3 min · first production in 1 h. A figure that does not exist yet is left out, and nothing is drawn when neither does.
• [ ] A repository that is not an app draws nothing new.
• [ ] A test (e.g. test/tui-about-golden.test.ts) records an app, its first preview and first production deploy, and checks the line. A fresh app shows no line.

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