* feat: extend quota providers and add usage dropdown
Add new quota providers:
- Claude (Anthropic API)
- Codex (OpenAI/ChatGPT)
- GitHub Copilot (base + add-on)
- Kimi for Coding
- OpenRouter
UI enhancements:
- Add rate limits dropdown in header with timer icon
- Desktop: sticky header with Used/Remaining toggle, refresh button
- Mobile: full-screen dropdown with same controls
- Per-provider sticky headers with provider logos
- Auto-refresh on open if no data exists
Usage settings page:
- Provider icon next to header
- Show in dropdown toggle per provider
- Global display selector (Usage vs Quota remaining)
- Auto-refresh controls in sidebar
Settings persistence:
- Add usageDisplayMode and usageDropdownProviders settings
- Server-side sanitization for new settings
Provider logo aliases:
- codex -> openai, claude -> anthropic
Bug fixes:
- Fix React error #310 by calling hooks before early returns
- Add aria-describedby to SettingsWindow dialog
- Remove horizontal scroll from dropdown
* fix: Remove duplicate github copilot declarations