plan mode: voice replies + skip clarifying questions / usage % indicator

What variant of Codex are you using?

app

What feature would you like to see?

in plan mode:

1. add a button to skip clarifying questions without dismissing the agent
2. allow voice input directly into the "No, and tell Codex..." response field

app: show remaining usage (% of limit) in the ui

Additional information

<img width="179" height="101" alt="Image" src="https://github.com/user-attachments/assets/1eba087d-e9d6-4038-85fc-e23d17e18177" />