Add Personal Access Token authentication

[Copilot]

Adds PAT authentication as an alternative to GitHub OAuth for users who prefer token-based login or need to bypass OAuth restrictions.

Changes

views/TokenGate.tsx

• Added toggle UI to switch between OAuth and PAT authentication methods
• Implemented PAT input form with validation and error handling
• Added direct link to GitHub token creation with pre-selected scopes (repo, read:user)
• Supports Enter key submission and proper state cleanup on method switching

UI

Initial login with both authentication options:

PAT input form:

Implementation

PAT authentication reuses the existing validateToken() flow - no changes needed to the GitHub service or storage layer. Both OAuth and PAT tokens are stored identically in localStorage and validated against the same GitHub API endpoint.

const handlePatLogin = async () => {
  if (!patToken.trim()) {
    setError('Please enter a Personal Access Token');
    return;
  }
  
  const user = await validateToken(patToken.trim());
  onSuccess(patToken.trim(), user);
};

Original prompt

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This section details on the original issue you should resolve

<issue_title>add support to login with PAT</issue_title>
<issue_description></issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes add support to login with PAT #22

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[github-actions]

🚀 Netlify Deployment

Deploy URL: https://694b68a87a5169a02c6a8905--my-test-site3.netlify.app

Branch: copilot/add-support-to-login-with-pat
Commit: 8fbb8f8