Setup multiple account auth

[tranngoclai]

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• New feature
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[github-actions]

This PR doesn't fully meet our contributing guidelines and PR template.

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[github-actions]

Hey! Your PR title Setup multiple account auth doesn't follow conventional commit format.

Please update it to start with one of:

• feat: or feat(scope): new feature
• fix: or fix(scope): bug fix
• docs: or docs(scope): documentation changes
• chore: or chore(scope): maintenance tasks
• refactor: or refactor(scope): code refactoring
• test: or test(scope): adding or updating tests

Where scope is the package name (e.g., app, desktop, opencode).

See CONTRIBUTING.md for details.

[github-actions]

The following comment was made by an LLM, it may be inaccurate:

Found a potentially related PR:

PR #11832: feat(auth): multi-account OAuth support with auto-relogin
#11832

This PR appears directly related to your "Setup multiple account auth" PR as it addresses multi-account OAuth support and authentication features. You should check if:

• This PR is already merged or still in progress
• Whether your PR addresses the same feature or a different aspect of multi-account auth

I'd recommend reviewing PR #11832 to understand the existing approach and ensure your changes don't duplicate or conflict with it.