hf leaves a stale <sha>.<etag>.incomplete orphan in blobs/ after a resumed or
retried chunk even though the real file finished — so "download complete" and the
model page disagreed (settings said done, the page showed ⚠ incomplete).

- model list: an .incomplete file now counts as an unfinished download ONLY when its
  final blob (<sha>) is absent; an orphan whose final blob exists is ignored. Fixes
  the false badge for ALL HF models, not just colibri.
- colibri catalog: _colibri_repo_complete now tests for dangling snapshot symlinks
  (the true "file missing" signal) instead of .incomplete presence, so the settings
  "present" indicator matches reality.
- colibri catalog label → the real size (~429 GB / 400 GiB).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01LoSpEthysqmseCc6Geizty