Fix authentication and credential handling vulnerabilities

[lucasging]

Summary of Changes

This pull request addresses two high-severity vulnerabilities identified in the frontend/types/security-fix.ts file:

1. Missing Authentication Checks:

   • Added a check to ensure that a valid GitHub token is provided before making API calls to /api/fix-vulnerabilities.
   • This prevents unauthorized access by ensuring that only authenticated requests are processed.

2. Credential Handling Issues:

   • Implemented secure handling of the GitHub token by including it in the Authorization header as a Bearer token.
   • This change protects the token from being exposed in the request payload, reducing the risk of interception.

These changes enhance the security of API interactions by enforcing authentication and protecting sensitive credentials.

[m20arcusk]

I'm not sure i understand this code pls vibe code and repush