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- Create tests/test_auth/conftest.py with pytest fixtures - mock_browser: Mock PlaywrightBrowser for unit testing - mock_canvas: Mock canvas element for QR code screenshot - sample_cookies: Test cookie data with z_c0 login cookie - sample_cookies_no_login: Test cookies without login state - mock_env_file: Temporary .kb_env file fixture - intermediate_path: Temporary intermediate directory fixture Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>