Add Cloudflare Pages deployment workflow

[haochenx]

Summary

• Added GitHub Actions workflow to automatically deploy webapp to Cloudflare Pages
• Production deployments on push to main (with tests)
• Preview deployments on pull requests (without tests for speed)

Configuration Required

Before this workflow can run, the following GitHub secrets need to be added:

• CLOUDFLARE_ACCOUNT_ID
• CLOUDFLARE_API_TOKEN

Deployment Details

• Project name: pyfinalo-webapp
• Build command: make build-webapp
• Output directory: webapp/app/dist
• Production URL: https://pyfinalo-webapp.pages.dev (after first deployment)

Test plan

• Workflow syntax is valid
• Secrets will need to be configured before first run
  - [ ] First deployment will create the Cloudflare Pages project

🤖 Generated with Claude Code

[github-actions]

🚀 Webapp deployed!

Preview URL: https://webapp-cloudflare-deployment.pyfinalo-webapp.pages.dev

The deployment should be available shortly. If the link doesn't work immediately, please wait a moment for Cloudflare to propagate the changes.

[github-actions]

🚀 Webapp deployed!

Preview URL: https://webapp-cloudflare-deployment.pyfinalo-webapp.pages.dev

The deployment should be available shortly. If the link doesn't work immediately, please wait a moment for Cloudflare to propagate the changes.

[github-actions]

🚀 Webapp deployed!

Preview URL: https://webapp-cloudflare-deployment.pyfinalo-webapp.pages.dev

The deployment should be available shortly. If the link doesn't work immediately, please wait a moment for Cloudflare to propagate the changes.

[haochenx]

@claude fix ci error

[github-actions]

🚀 Webapp deployed!

Preview URL: https://webapp-cloudflare-deployment.pyfinalo-webapp.pages.dev

The deployment should be available shortly. If the link doesn't work immediately, please wait a moment for Cloudflare to propagate the changes.