Enhance middleware authentication

[spacexbt]

This PR enhances the middleware authentication with the following improvements:

Changes Made

• Added comprehensive error handling with try-catch blocks
• Implemented additional security headers
• Added configuration constants for better maintainability
• Improved type safety with TypeScript interfaces
• Modularized code with helper functions
• Added comprehensive test coverage

New Features

• Extended public paths configuration
• Better error logging
• Security headers implementation
• OAuth flow improvements
• Proper error redirection

Testing

Added comprehensive test suite covering:

• Public path access
• OAuth flow handling
• Authentication validation
• Token refresh scenarios
• Error cases
• Security headers verification

Security Improvements

• Added X-Frame-Options header
• Added X-Content-Type-Options header
• Added Referrer-Policy header
• Added Permissions-Policy header
• Improved error handling for security-related failures

All tests are passing, and the code has been tested locally. Please review and let me know if any changes are needed.

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