createGiteaClient(config, fetchImpl).getIssue(index) fetches one issue
and normalizes raw gitea JSON to a typed GiteaIssue with scheduler
facts precomputed via extractLabelFacts. Network is an injected
FetchLike (core has no DOM lib; global fetch is structurally
assignable), so it unit-tests against a stub — no live calls in the
suite. Non-2xx responses throw GiteaApiError carrying status + body.
Closes P1-1. Verified end-to-end against the live repo's issue #9.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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