Replace /api/v1/user with /api/v1/repos/{owner}/{repo} in three places:
- preflight_check() auth verification
- setup_codeberg_auth() --token flag verification
- setup_codeberg_auth() interactive flow verification
The repo endpoint only requires repo-level access, which matches the
scopes disinto actually needs (write:issue, write:repository). Tokens
without read:user scope now pass verification correctly.
Also use generic "token" as netrc login since the username is no longer
retrieved from the API (git operations authenticate via the token, not
the login field).
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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