Gitea's PUT/DELETE /user/starred/{owner}/{repo} require write:repository
token scope (verified against Gitea's route registration source), but
this app's OAuthClientConfig only ever requested read-only scopes,
enforced by a hard require() -- every star/unstar attempt was guaranteed
to fail server-side (403), surfaced as the reported red 'failed' star.
Adds write:repository as one narrow, explicit exception to the read-only
invariant (every other write scope, including the pre-existing unused
write:user, is still rejected). Requires one manual re-login on already
logged-in devices before it takes effect, since a refresh token carries
forward the scope it was originally granted under.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>