The 'stuck on the download page, model folder has only refs/ no weights' case
(a connection dropping/blocking mid-pull) is a recurring support report but
wasn't in the install troubleshooting guide. Add section 13 with the recovery
steps + antivirus/VPN/mirror escalation + a huggingface-cli manual fallback.
Docs-only; no version bump.
Co-authored-by: mergetest <test@local>
Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>