fix: add cross-domain cookie navigation for UK/regional users

[Jah-yee]

Description

After login, navigate to accounts.google.com and myaccount.google.com to ensure .google.com cookies are set (not just regional variants like .google.co.uk). This fixes authentication failures for users in the UK and other regions where Google's login flow sets cookies on regional domains that notebooklm.google.com rejects.

Fix

• Added cross-domain navigation after user presses Enter in login flow
• Navigates to accounts.google.com → myaccount.google.com → notebooklm.google.com
• This triggers Google's cross-domain cookie propagation
• Failures are logged at debug level so they don't block login

Testing

This fix addresses the issue described in #146 where UK users get cookies on .google.co.uk that notebooklm.google.com rejects.

Closes #146

[gemini-code-assist]

Summary of Changes

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This pull request addresses a critical authentication issue affecting users in specific geographical regions, such as the UK. By introducing a series of post-login navigations, it ensures that the necessary .google.com cookies are correctly propagated across domains, thereby resolving instances where regional domain cookies (e.g., .google.co.uk) were not recognized by notebooklm.google.com. This change significantly improves the login experience and accessibility for a segment of the user base.

Highlights

• Authentication Fix for Regional Users: Implemented a solution to resolve authentication failures experienced by users in the UK and other regions, where Google's login flow sets cookies on regional domains that notebooklm.google.com previously rejected.
• Cross-Domain Cookie Navigation: Introduced a sequence of navigations to accounts.google.com, myaccount.google.com, and then back to notebooklm.google.com immediately after a user logs in, to trigger Google's cross-domain cookie propagation mechanism.
• Error Handling: Ensured that any failures during the cross-domain cookie navigation process are caught and logged at a debug level, preventing them from blocking the user's login flow.

Changelog

• src/notebooklm/cli/session.py
  • Added logic to perform cross-domain navigation after user login to ensure proper cookie setting.
  • Included error handling for the navigation process, logging failures at debug level.

Activity

• No specific activity has been recorded for this pull request yet.

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[gemini-code-assist]

Code Review

This pull request adds a helpful fix for users in regions with country-specific Google domains by navigating to global Google domains to set the correct cookies. The implementation is sound. I have two suggestions to improve the code: one for adhering to the project's logging style, and another to refactor the navigation logic for better maintainability.

[teng-lin]

Thanks for the contribution here — really appreciate you taking the time to investigate and propose a fix for the regional cookie issue. We already have an earlier PR open for the same problem in #151, so I’m going to close this one as a duplicate to keep the discussion in one place. Thanks again for the help.