[BUG] Require consent when switching to extra usage

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

The unexpected behavior is that it is not clear in the interface when the switch to extra usage happens the moment it happens and whether it's desired to rapidly consume all my credit to complete the task.

What Should Happen?

As a user, I should be dignified by consenting to both the switch to extra usage and _potentially_ the rate of consumption given the nature of the task irrespective of whatever periodic budget limit is set in billing settings. e.g. slow-and-steady vs. get-em-Jeff-get-em! (perhaps that a separate feature request)

Error Messages/Logs

Just a rate limit error that I cannot retrieve due to a separate /compact bug.

Steps to Reproduce

1. Max out usage quota
2. Max out extra usage quota
3. Notice it wasn’t obvious

Claude Model

Sonnet (default)

Is this a regression?

No, this never worked

Last Working Version

_No response_

Claude Code Version

2.1.75 (Claude Code)

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_