Configure Cloudflare Pages to deploy the dist directory as static assets.
This fixes the deployment error "Missing entry-point to Worker script".
The frontend (static assets) will be served by Pages while the backend
(WebSocket server, Durable Objects) runs separately as a Worker.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
