bce8d4e4c9
- Added `/login <provider>` command for direct OAuth provider login with automatic selector routing. - Added Kagi API key authentication support as new OAuth provider across ai and coding-agent packages. - Added optional `providerId` parameter to `showOAuthSelector()` for direct provider selection without manual input. - Simplified web search result formatting by removing empty sections (Answer, Sources, Meta, Related). - Fixed MCP tool schema dereferencing and Ajv validation warnings for non-standard format keywords. - Refactored OAuth login/logout logic into extracted handler methods for improved maintainability.