'Staging' is not a single server: any beta-channel server pulls a release itself,
so a per-server 'deployed' step in the dev dashboard was arbitrary + contradicted
that model. The pipeline now tracks only the global build facts of a beta —
Tag (Gitea) → Mirror (GitHub-private) → CI. Removes PipelineStatus::testStep, the
test-server Setting/input/saveTestServer, and the now-orphaned lang keys.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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