Files
Naiyuan Qing c49c778613 fix(editor): align Preview gate with Download — survive URL-only sources (#2566)
The Eye button required a fully resolved Attachment record (URL-lookup
via `resolveAttachment(href)`) before showing. Download only required
the URL, falling back to `openExternal(href)` when the lookup missed.
Result: any case where the URL in markdown couldn't be reverse-matched
to the entity's `attachments` prop (cross-comment copy-paste, stale
caches) silently hid the Preview button while Download kept working —
edit and readonly surfaces diverged for the same content.

Widen the Preview gate to mirror Download: show the Eye whenever the
filename indicates a previewable type. Introduce a `PreviewSource`
tagged union — `{ kind: "full", attachment }` for the existing path,
`{ kind: "url", url, filename }` for the fallback. Media kinds
(pdf/video/audio) render directly from the URL; text kinds still
require an attachment id because the /content proxy is ID-keyed, so
`tryOpen` rejects URL+text combinations and PreviewContent has a
defensive fallback for direct mounts.

Side effects:
- `getPreviewKind` gains filename-extension fallbacks for video/audio
  (was PDF-only); without these the URL-only path can't infer kind
  when content_type is empty.
- AttachmentList in comment-card.tsx unchanged behaviorally — only the
  tryOpen call site is updated to the new signature.

Pre-existing architectural issues (AttachmentList readonly-only,
URL-based attachment lookup, per-entity ownership) are intentionally
out of scope.

Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
2026-05-14 11:33:48 +08:00
..