Pass string arguments as separate arguments

[Christdej]

Ready for review checklist:

• A self-review has been performed
• All commits run individually
• Temporary changes have been removed, like console.log, TODO, etc.
• The PR has been tested locally
• A test has been written
  • This change doesn't need a new test
• Relevant issues are linked
• Remaining work is documented in issues
  • There is no remaining work from this PR that require new issues
• The changes does not introduce dead code as unused imports, functions etc.

[Copilot]

Pull request overview

This PR refactors frontend API error logging to pass message parts to console.error as separate arguments instead of building a single interpolated string. It is a small observability-focused change in the shared API error handler used across the frontend API client.

Changes:

• Update handleError logging for ApiError instances to use formatted console.error arguments.
• Update generic error logging to keep the thrown error/object as a separate console argument.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.