fix: redirect 401 to redirect url in payload

[lucaseduoli]

This pull request adds a global override for the window.fetch method in the frontend to automatically handle HTTP 401 (Unauthorized) responses. When a 401 is encountered, the code attempts to extract a redirect URL from the response payload and, if found, navigates the browser to that URL.

Authentication and Redirect Handling:

• Overrides window.fetch in the browser to check for HTTP 401 responses, and if present, parses the response for a redirect URL (redirect_url, redirectUrl, or redirect). If a valid URL is found, the browser is redirected to it. Errors during parsing are logged to the console.

[coderabbitai]

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