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- Gallery: DELETE /api/gallery/all removes every image under output/; "Delete all" button with in-app confirm and a deleted/failed count. - Downloads: surface a clear, actionable message when CivitAI/HuggingFace returns 401/403 (model requires login/early-access, or the key/token lacks access) instead of a bare error, both at resolve time and during the download stream. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>