Show Ctrl+T/Ctrl+C shortcuts in transcript overlay footer

What version of Codex is running?

codex-cli 0.25.0

Which model were you using?

gpt-5

What platform is your computer?

Darwin 24.5.0 arm64 arm

What steps can reproduce the bug?

1. Open Codex CLI and enter a conversation.
2. Press Ctrl+T to open the transcript overlay.
3. Observe the footer hints:

• Line 1: "↑/↓ scroll PgUp/PgDn page Home/End jump"
• Line 2: "q quit Esc edit prev" (and sometimes "⏎ edit message" when selection is active)

1. While in the overlay, press Ctrl+T again → the overlay closes.
2. While in the overlay, press Ctrl+C → the overlay closes.

What is the expected behavior?

• The footer should list all relevant shortcuts available in the overlay, including:
• Ctrl+T: toggle/close transcript overlay
• Ctrl+C: quit/close overlay

What do you see instead?

• The footer only shows "q quit Esc edit prev" (and optionally "⏎ edit message").
• It does not mention Ctrl+T or Ctrl+C even though both close the overlay.

Additional information

_No response_