ts fixes from reorg + unit test work

src/components/WhatsNewModal.test.tsx

@@ -41,9 +41,7 @@ describe('WhatsNewModal', () => {
   it('should call onClose when the close icon button is clicked', () => {
     render(<WhatsNewModal {...defaultProps} />);
     // The close button is an SVG icon inside a button, best queried by its aria-label.
-    // Assuming the XCircleIcon doesn't have a specific label, we can find the button containing it.
-    // Let's assume the button has a label for accessibility.
-    const closeButton = screen.getByRole('button', { name: '' }); // Adjust if it has a label
+    const closeButton = screen.getByRole('button', { name: /close/i });
     fireEvent.click(closeButton);
     expect(mockOnClose).toHaveBeenCalledTimes(1);
   });