Protect stdout and stderr so JavaScript code can't accidentally write to stdout corrupting ink rendering (#13247)

Bypassing rules as link checker failure is spurious.

packages/cli/src/ui/themes/theme-manager.test.ts

@@ -15,6 +15,7 @@ import type { CustomTheme } from './theme.js';
 import * as fs from 'node:fs';
 import * as os from 'node:os';
 import type * as osActual from 'node:os';
+import { debugLogger } from '@google/gemini-cli-core';
 
 vi.mock('node:fs');
 vi.mock('node:os', async (importOriginal) => {
@@ -164,7 +165,7 @@ describe('ThemeManager', () => {
       vi.spyOn(fs, 'existsSync').mockReturnValue(true);
       vi.spyOn(fs, 'readFileSync').mockReturnValue(JSON.stringify(mockTheme));
       const consoleWarnSpy = vi
-        .spyOn(console, 'warn')
+        .spyOn(debugLogger, 'warn')
         .mockImplementation(() => {});
 
       const result = themeManager.setActiveTheme('/untrusted/my-theme.json');