I'll help you create a POC demonstrating React Error Boundaries. Let me first check the codebase structure.

I have a good understanding of the codebase. I'll create a POC that demonstrates:

1. With Error Boundary - Clean fallback UI when errors occur
2. Without Error Boundary - Using try-catch with toast notifications (messy UX)

The counter will intentionally throw an error when it reaches a certain value (e.g., 5) to demonstrate the difference.

This POC demonstrates the power of React Error Boundaries with two side-by-side counters:

1. With Error Boundary (Left): When the counter hits 5, the error is caught gracefully and displays an inline fallback card with a "Try Again" button. The UI stays clean and recovery is intuitive.
2. Without Error Boundary (Right): Uses traditional try-catch with toast notifications. The toast is disconnected from the component, the counter gets stuck, and there's no clear recovery path.

Click the + button on each counter to see how they handle the error at value 5. The Error Boundary approach keeps errors contained and provides a much better user experience!

Now I have a full picture. To make this deployable on GitHub Pages, I need to:

1. Update next.config.mjs to enable static export
2. Add a GitHub Actions workflow for automated deployment
3. Add a .nojekyll file to prevent Jekyll processing

The codebase is now configured for GitHub Pages deployment. Here's what I changed:

1. Updated next.config.mjs - Added output: 'export' to generate static HTML, trailingSlash: true for proper routing, and commented-out basePath/assetPrefix options you can enable if deploying to a subpath (e.g., github.com/username/repo-name).
2. Created .github/workflows/deploy.yml - A GitHub Actions workflow that automatically builds and deploys to GitHub Pages on every push to main.
3. Added public/.nojekyll - Prevents GitHub Pages from processing with Jekyll (which ignores _next folders).

To deploy: Push to GitHub, go to your repo Settings > Pages > Source, select "GitHub Actions", and the workflow will handle the rest. If your repo is at username.github.io/repo-name, uncomment the basePath and assetPrefix lines in the config.