Add automatic PDF print tests (with Cypress)

Some leads:
- [Stackoverflow: Convert HTML to PDF using Cypress](https://stackoverflow.com/questions/76620597/convert-html-to-pdf-using-cypress-io)
- [Cypress print test](https://github.com/bahmutov/cypress-grep-example/blob/add-print-spec/cypress/integration/print-spec.js)

The current issue is that Cypress prints its whole UI and also doesn't properly apply the print styles when running this.

Review the referenced Cypress print-spec.js example and the linked guidance on converting HTML to PDF with Cypress. Investigate how the current Cypress run captures the whole UI and handles print styles; done means automated PDF print tests that capture the intended content and apply the print styles correctly.

Written by the indexing model from the issue text.