Extra Usage Display in /usage

What: Pro and Max plan users can now see their extra usage balance directly in the /usage command output.

How to use:

/usage  # Now shows extra usage section for eligible users

Details:

• Shows three states:
• Not enabled: "Extra usage not enabled • /extra-usage to enable"
• Unlimited: Shows "Unlimited" with no progress bar
• Metered: Shows utilization bar with spending (e.g., "$5.23 / $30.00 spent")
• Displays monthly reset date
• Controlled by feature flag claude_code_usage_show_extra_usage
• Only visible to Pro and Max subscribers
• Evidence: PM3() at line 481986, RJ0 title at line 482045