v0.2.2

Fixes:
- Fix cross-provider model switching (MiniMax, Gemini, all providers)
- resolve_driver() no longer passes wrong API key when switching providers
- Add provider inference from model name prefix for uncataloged models
- Add MiniMax-M2.5 to model catalog (Frontier tier)

Features:
- GitHub Copilot OAuth device flow login
- OpenAI Codex provider with credential sync
- Claude Code CLI backend driver