Describe the bug
A clear and concise description of what the bug is.
GitHub OAuth authentication fails when attempting to link a GitHub account. Users encounter a "redirect_uri is not associated with this application" error on GitHub's authorization page, preventing account linking.

To Reproduce
Steps to reproduce the behavior:
Navigate to the payout methods page
Click on the "Link" button in the GitHub account section
Get redirected to GitHub OAuth authorization page
See "redirect_uri is not associated with this application" error

Expected behavior
A clear and concise description of what you expected to happen.
When clicking the "Link" button, users should be redirected to GitHub's authorization page, then back to the application after authorizing, with their GitHub account successfully linked to their profile.

Screenshots or GIFs
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and

Info (please complete the following information):
Browser: Chrome, Edge
Version: Latest

Additional context
Add any other context about the problem here.
The issue occurred due to improper URL encoding of the redirect URI and a mismatch between the callback URL in the code and what was configured in the GitHub OAuth app settings. The setTimeout implementation in the redirect flow was also causing issues with the proper loading state.