- Each terminal row is now two lines: the name (bold, with status icon) on
  top, the description + pid + uptime as a dim meta line beneath, separated
  by '·' — easier to scan than a single run-on line.
- Close is bound to Delete/Backspace instead of Enter: Enter commonly means
  "open/select", Delete means "remove/close", which matches closing a
  terminal. Title updated: "Open terminals — Delete to close, Esc to cancel".
  No-op on an empty list.

Tests: close-on-delete (was close-on-enter), empty-list delete is a no-op.
Full suite: 1000 passed, 1 skipped.