c10fc1e081
- Add pkce.ts with generatePKCE() using Web Crypto API - Update anthropic.ts, google-gemini-cli.ts, google-antigravity.ts - Replace Buffer.from() with atob() for base64 decoding - Works in both Node.js 20+ and browsers The OAuth modules still use Node.js http.createServer for callbacks, so they only work in CLI environments, but they no longer crash on import in browser bundles.