It looks like the build is choking on the return that lives inside the template-string’s inline .map() callback.
Moving that logic outside the template (and adding a quick “'use server'” pragma) eliminates the “Illegal return statement” error.

This update:

• Adds 'use server' to both API routes
• Builds any multi-line text before the template literal, sidestepping the inline return that was triggering the “Illegal return statement” error.

Everything should now compile and run without that syntax error. ✅

This eliminates the "}\" syntax problem and restores a valid async function recordTestCompletion declaration right after the component.