Feature request: Statusline monthly usage from Anthropic API (per-user)

Feature request: Statusline monthly usage from Anthropic API (per-user)

The Claude Code statusline currently tracks monthly spend locally, which drifts from actual billed usage. It would be great if the statusline could pull real spend from Anthropic's usage API.

Blocker: The current Admin API only reports org-level costs, not per-user. This makes it impossible to programmatically track individual user spend — especially limiting for teams with per-user budgets (e.g. $75/month caps).

Two requests:

1. Anthropic Admin API should expose per-user usage breakdowns
2. Claude Code statusline should optionally fetch real spend via API key when available

This would allow the statusline to display accurate, real-time personal spend without manual workarounds.