Capture off-platform links (mega/gdrive/mediafire/dropbox/pixeldrain) embedded
in post bodies so they're never silently dropped, and surface them in the post
view. The download worker (Phase 4) walks these rows.
- link_extract.py: pure extractor — <a href> + bare URLs, unwraps Patreon
redirect shims, PRESERVES the full url incl. #fragment (mega's key), dedups.
Reusable by every platform (runs off Post.description).
- external_link model + migration 0049: post_id/artist_id/host/url/label/status
/attempts/last_error/attachment_id/timing; CHECK whitelists (full enum incl.
worker statuses up front) + (post_id,url) unique.
- importer._sync_external_links: insert-missing on both import paths
(_apply_sidecar + upsert_post_record) so a re-import never resets a link's
status; runs for all platforms.
- post_feed_service.get_post: returns external_links (detail-only).
- PostCard: renders the links (host chip + label + status) once expanded.
- tests: extractor (5 hosts, fragment, shim unwrap, dedup), importer (record +
no-dup on reimport), serializer.
Refs FC #830.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
