Display premium request overage usage when personal allowance is exhausted

### Describe the feature or problem you'd like to solve

When a user exceeds their included monthly premium requests, extra requests are billed to the organization. The TUI currently shows "0% remaining" but doesn't display how many extra requests the user has consumed.

### Proposed solution

Current behavior

- Status shows "0% remaining" when personal allowance is exhausted
- No indication of overage consumption
- User has no visibility into billable overage requests they're generating

Proposed behavior

Show overage usage when allowance is exhausted, e.g.:

- 0% remaining • 42 over (127%)

Use case

- Users should understand when they're generating billable overage costs
- Helps with personal accountability and budget awareness
- Organizations may set spending caps; users should see consumption against those limits
- Avoids surprise when overage costs appear on billing

### Example prompts or workflows

_No response_

### Additional context

_No response_