Replace custom build.ts dependency with standard Vite setup:
- package.json with Vite scripts (dev, build, preview)
- Use @modelcontextprotocol/ext-apps package imports
- Standard Vite project structure (index.html at root)
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>