Add test coverage for PortalColumn2 when window is undefined

Added test case "handles portal footer when window is not defined" to verify
that the Footer component renders correctly in SSR/test environments where
window is not defined.

This test covers the typeof window !== 'undefined' check on line 491 in
Footer/index.tsx, ensuring that the component gracefully handles the absence
of the window object without crashing.

Addresses Review 13 from RoyEJohnson.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

Author: 2 people

src/app/components/Footer/Footer.spec.tsx

@@ -112,6 +112,35 @@ describe('Footer', () => {
     expect(focusManager.captureOpeningElement).toHaveBeenCalledWith('contactdialog');
   });
 
+  it('handles portal footer when window is not defined', () => {
+    // Save the original window
+    const originalWindow = global.window;
+
+    // Mock window as undefined to simulate SSR/test environment
+    // @ts-expect-error Testing window undefined scenario
+    delete global.window;
+
+    const portalName = 'portalName';
+    const params = { portalName };
+    const state = {
+      navigation: {
+        match: { params },
+      },
+    } as unknown as AppState;
+    const store = createTestStore(state);
+
+    // Should render without crashing even when window is undefined
+    expect(() => {
+      const component = renderer.create(<TestContainer store={store}>
+        <Footer />
+      </TestContainer>);
+      component.unmount();
+    }).not.toThrow();
+
+    // Restore window
+    global.window = originalWindow;
+  });
+
 });
 
 describe('useContactDialog', () => {