fix(frontend): align failing button-label test with updated UI text

[Copilot]

frontend_build / frontend_build was failing because a frontend test still asserted the old button label after the UI copy changed. This PR updates the test expectation to match the current label and removes the stale assertion mismatch causing the workflow failure.

• Failure source

  • Test was coupled to outdated button text, so CI failed even though runtime behavior was correct.

• Change made

  • Updated the affected frontend test to query/assert against the new button label.
  • Kept scope limited to test expectations tied to the renamed label.

• Example

  // before
  expect(screen.getByRole('button', { name: 'Old label' })).toBeInTheDocument();
  
  // after
  expect(screen.getByRole('button', { name: 'New label' })).toBeInTheDocument();

[github-actions]

Visit the preview URL for this PR (updated for commit ab3bd3e):

https://tormap-36f44--pr582-copilot-fix-frontend-toxw0f1v.web.app

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