- Created combined UsagePopover component with tab switching between providers
- Added Codex usage API endpoint and service (returns not available message)
- Updated BoardHeader to show single usage button for both providers
- Enhanced type definitions for Codex usage with primary/secondary rate limits
- Wired up Codex usage API in HTTP client
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
