fix(mcp): Display OAuth authentication messages in CLI UI instead of debug console (#6919)

Co-authored-by: Yoichiro Tanaka <yoichiro6642@gmail.com>
Co-authored-by: Jacob Richman <jacob314@gmail.com>

packages/cli/src/ui/commands/mcpCommand.test.ts

@@ -904,6 +904,7 @@ describe('mcpCommand', () => {
         'test-server',
         { enabled: true },
         'http://localhost:3000',
+        expect.any(Object),
       );
       expect(mockToolRegistry.discoverToolsForServer).toHaveBeenCalledWith(
         'test-server',